Megatest

mofiles/mtconfigf.o : mtconfigf/mtconfigf.scm
mofiles/ulex.o      : ulex/ulex.scm
mofiles/mutils.o    : mutils/mutils.scm
mofiles/cookie.o    : stml2/cookie.scm
mofiles/stml2.o     : stml2/stml2.scm

# for the modularized stuff

mofiles/commonmod.o : megatest-fossil-hash.scm mofiles/stml2.o \
                      mofiles/mtargs.o mofiles/pkts.o mofiles/mtconfigf.o \
                      mofiles/processmod.o
mofiles/pgdbmod.o   : mofiles/commonmod.o
mofiles/dbmod.o     : mofiles/commonmod.o mofiles/keysmod.o \
                      mofiles/tasksmod.o mofiles/odsmod.o
mofiles/tasksmod.o  : mofiles/commonmod.o mofiles/pgdbmod.o
mofiles/rmtmod.o    : mofiles/commonmod.o \
                      mofiles/apimod.o mofiles/ulex.o mofiles/itemsmod.o
mofiles/apimod.o    : mofiles/dbmod.o mofiles/commonmod.o mofiles/servermod.o
mofiles/runsmod.o   : mofiles/testsmod.o mofiles/mtmod.o
mofiles/mtmod.o     : mofiles/mtconfigf.o mofiles/rmtmod.o mofiles/tasksmod.o \
                      mofiles/dbmod.o mofiles/pgdbmod.o mofiles/launchmod.o \
                      mofiles/subrunmod.o
mofiles/servermod.o : mofiles/commonmod.o mofiles/dbmod.o
mofiles/testsmod.o  : mofiles/servermod.o mofiles/dbmod.o
mofiles/launchmod.o : mofiles/subrunmod.o mofiles/testsmod.o

# special cases where an upstream .import file is needed to compile a module
mofiles/rmtmod.o    : ulex.import.o

# Removed from megamod.o dep:   mofiles/ftail.o
mofiles/megamod.o   : \
   mofiles/rmtmod.o \
   mofiles/commonmod.o \
   mofiles/apimod.o \
   mofiles/archivemod.o \

(declare (unit archivemod))
(declare (uses commonmod))

(module archivemod
	*
	
(import scheme chicken data-structures extras)
(import (prefix sqlite3 sqlite3:) posix typed-records srfi-18 srfi-69 format ports srfi-1 matchable)
(import scheme (chicken base))
(import (prefix sqlite3 sqlite3:) typed-records srfi-18 srfi-69 format (chicken port) srfi-1 matchable)
(import commonmod)
;; (use (prefix ulex ulex:))

(include "common_records.scm")


)

((license "BSD")
 (category lang-exts)
 (author "Alex Shinn")
 (synopsis "Load modules lazily")
 (components (extension autoload)))

;;; autoload.meta -*- Hen -*-

((egg "autoload.egg")
 (synopsis "Load modules lazily")
 (category lang-exts)
 (license "BSD")
 (author "Alex Shinn")
 (doc-from-wiki)
 (files "autoload.meta" "autoload.scm" "autoload.release-info" "autoload.setup"))

;;;; autoload.scm -- load modules lazily
;;
;; Copyright (c) 2005-2009 Alex Shinn
;; All rights reserved.
;;
;; BSD-style license: http://www.debian.org/misc/bsd.license

;; Provides an Emacs-style autoload facility which takes the basic form
;;
;;   (autoload unit procedure-name ...)
;;
;; such that the first time procedure-name is called, it will perform a
;; runtime require of 'unit and then apply the procedure from the newly
;; loaded unit to the args it was passed.  Subsequent calls to
;; procedure-name will thereafter refer to the new procedure and will
;; thus not incur any overhead.
;;
;; You may also specify an alias for the procedure, and a default
;; procedure if the library can't be loaded:
;;
;;   (autoload unit (name alias default) ...)
;;
;; In this case, although the procedure name from the unit is "name,"
;; the form defines the autoload procedure as "alias."
;;
;; If the library can't be loaded then an error is signalled, unless
;; default is given, in which case the values are passed to that.
;;
;; Examples:
;;
;; ;; load iconv procedures lazily
;; (autoload iconv iconv iconv-open)
;;
;; ;; load some sqlite procedures lazily with "-" names
;; (autoload sqlite (sqlite:open sqlite-open)
;;                  (sqlite:execute sqlite-execute))
;;
;; ;; load md5 library, falling back on slower scheme version
;; (autoload scheme-md5 (md5:digest scheme-md5:digest))
;; (autoload md5 (md5:digest #f scheme-md5:digest))

(module autoload (autoload)

(import scheme (chicken base))

(define-syntax autoload
  (er-macro-transformer
   (lambda (expr rename compare)
     (let ((module (cadr expr))
           (procs (cddr expr))
           (_import (rename 'import))
           (_define (rename 'define))
           (_let (rename 'let))
           (_set! (rename 'set!))
           (_begin (rename 'begin))
           (_apply (rename 'apply))
           (_args (rename 'args))
           (_tmp (rename 'tmp))
           (_eval (rename 'eval))
           (_condition-case (rename 'condition-case)))
       `(,_begin
         ,@(map
            (lambda (x)
              (let* ((x (if (pair? x) x (list x)))
                     (name (car x))
                     (full-name
                      (string->symbol
                       (string-append (symbol->string module) "#"
                                      (symbol->string name))))
                     (alias (or (and (pair? (cdr x)) (cadr x)) name))
                     (default (and (pair? (cdr x)) (pair? (cddr x)) (caddr x))))
                (if default
                    `(,_define (,alias . ,_args)
                       (,_let ((,_tmp (,_condition-case
                                       (,_begin
                                        (,_eval
                                         (begin (require-library ,module)
                                                #f))
                                        (,_eval ',full-name))
                                        (exn () ,default))))
                           (,_set! ,alias ,_tmp)
                           (,_apply ,_tmp ,_args)))
                    `(,_define (,alias . ,_args)
                       (,_let ((,_tmp (,_begin
                                        (,_eval
                                         (begin (require-library ,module)
                                                 #f))
                                        (,_eval ',full-name))))
                         (,_set! ,alias ,_tmp)
                         (,_apply ,_tmp ,_args))))))
            procs))))))

)

(compile -s -O2 -j autoload autoload.scm)
(compile -s -O2 autoload.import.scm)

(install-extension 
 'autoload '("autoload.so" "autoload.import.so") 
 '((version 3.0) (syntax)))

(declare (unit clientmod))
(declare (uses commonmod))

(module clientmod
	*
	
(import scheme chicken data-structures extras)
(import (prefix sqlite3 sqlite3:) posix typed-records srfi-18 srfi-69 format ports srfi-1 matchable)
(import scheme (chicken base))
(import (prefix sqlite3 sqlite3:) typed-records srfi-18 srfi-69 format (chicken port) srfi-1 matchable)
(import commonmod)
;; (use (prefix ulex ulex:))

(include "common_records.scm")


)

;; 
;;     You should have received a copy of the GNU General Public License
;;     along with Megatest.  If not, see <http://www.gnu.org/licenses/>.
;;
;;======================================================================

;; (use trace)
(use typed-records)
(import typed-records)

;; moved to commonmod

;;======================================================================

(declare (unit commonmod))
(declare (uses mtargs))
;; (declare (uses stml2))
(declare (uses mtconfigf))
(declare (uses ulex))
(declare (uses pkts))
(module commonmod
	*
	
(import scheme chicken data-structures extras)
(import scheme (chicken base)) 

(use (prefix sqlite3 sqlite3:) posix typed-records srfi-18
     srfi-1 files format srfi-13 matchable 
     srfi-69 ports
     (prefix base64 base64:)
     regex-case regex hostinfo srfi-4
     (prefix dbi dbi:)
     stack
     md5 
     message-digest
     z3
     directory-utils
     sparse-vectors)

(import pkts)
(import ulex)
(import	(prefix mtconfigf configf:))
(import	(prefix mtargs args:))

(include "common_records.scm")
(include "megatest-fossil-hash.scm")
(include "megatest-version.scm")

    ;; TEST DATA
    test-data-rollup
    csv->test-data

    ;; MISC
    sync-inmem->db

    ;; TESTMETA
    ;; TESTMETAl
    testmeta-add-record
    testmeta-update-field

    ;; TASKS
    tasks-add
    tasks-set-state-given-param-key
    ))

;;======================================================================
;; ALLDATA
;;======================================================================
;;

;; attempt to consolidate a bunch of global information into one struct to toss around
(defstruct alldat
  ;; misc
  (denoise           (make-hash-table))
  (areapath          #f) ;; i.e. toppath
  (mtconfig          #f)
  (log-port          #f)
  (areadat           #f) ;; i.e. runremote
  (ulexdat           #f) ;; connection to the databases
  (rmt-mutex         (make-mutex))
  (db-sync-mutex     (make-mutex))
  (db-with-db-mutex  (make-mutex))
  (read-only-queries api:read-only-queries)
  (write-queries     api:write-queries)
  (max-api-process-requests 0)
  (api-process-request-count 0)

(declare (unit configfmod))
;; (declare (uses commonmod))

(module configfmod
	*
	
(import scheme chicken data-structures extras)
(import (prefix sqlite3 sqlite3:) posix typed-records srfi-18
	srfi-69 format ports srfi-1 matchable regex)
(import scheme (chicken base))
(import (prefix sqlite3 sqlite3:) typed-records srfi-18
	srfi-69 format (chicken port) srfi-1 matchable regex)
;; (import commonmod)
;; (use (prefix ulex ulex:))

(include "common_records.scm")

(define (configf:lookup cfgdat section var)
  (if (hash-table? cfgdat)

(declare (uses ulex.import))
(declare (uses cookie.import))
(declare (uses stml2.import))
(declare (uses ducttape-lib.import))
(declare (uses mtconfigf.import))

(declare (uses gutilsmod))
(declare (uses servermod))
(declare (uses megamod))
(declare (uses commonmod))
(declare (uses rmtmod))
(declare (uses runsmod))
(declare (uses dbmod))
(declare (uses testsmod))
(declare (uses tasksmod))
(declare (uses dcommonmod))
(declare (uses tasksmod))


(import gutilsmod)
(import servermod)
(import megamod)
(import commonmod)
(import rmtmod)
(import runsmod)
(import dbmod)
(import testsmod)
(import tasksmod)

       (iup:hbox
        (iup:button "Hide All" #:action (lambda (obj)
                                          (for-each (lambda (graph-cell)
                                                      (let* ((graph-dat   (hash-table-ref (dboard:tabdat-graph-cell-table tabdat) graph-cell)))
                                                        (dboard:graph-dat-flag-set! graph-dat #f)))
                                                    (hash-table-keys (dboard:tabdat-graph-cell-table tabdat)))))))
      ))))

;;======================================================================
;; SYSTEM MONITOR - Track relevant Megatest processes
;;======================================================================
;;
;; A gui for launching tests
;;
(define (dashboard:sysmon commondat tabdat #!key (tab-num #f))
  (let* ((drawing               (vg:drawing-new))
	 (sysmon-tab-updater (lambda ()	
			       (debug:catch-and-dump 
				(lambda ()
				  (let ((tabdat        (dboard:common-get-tabdat commondat tab-num: tab-num)))
				    (if tabdat
					(let ((last-data-update (dboard:tabdat-last-data-update tabdat))
					      (now-time         (current-seconds)))
					  (dashboard:sysmon-canvas-updater commondat tabdat tab-num) ;; redraws canvas on user input (I think...)
					  ))))
				   "dashboard:sysmon-tab-updater")))
	 (key-listboxes #f) ;; 
	 (update-keyvals (lambda ()
			   (dboard:target-updater tabdat))))
    (dboard:tabdat-drawing-set! tabdat drawing)
    (dboard:commondat-add-updater commondat sysmon-tab-updater tab-num: tab-num)
    (iup:vbox
     (let* ((cnv-obj (iup:canvas 
		      ;; #:size "250x250" ;; "500x400"
		      #:expand "YES"
		      #:scrollbar "YES"
		      #:posx "0.5"
		      #:posy "0.5"
		      #:action (make-canvas-action
				(lambda (c xadj yadj)
				  (debug:catch-and-dump
				   (lambda ()
				     (if (not (dboard:tabdat-cnv tabdat))
					 (let ((cnv     (dboard:tabdat-cnv tabdat)))
					   (dboard:tabdat-cnv-set! tabdat c)
					   (vg:drawing-cnv-set! (dboard:tabdat-drawing tabdat)
								(dboard:tabdat-cnv tabdat))))
				     (let ((drawing (dboard:tabdat-drawing tabdat))
					   (old-xadj (dboard:tabdat-xadj   tabdat))
					   (old-yadj (dboard:tabdat-yadj   tabdat)))
				       (if (not (and (eq? xadj old-xadj)(eq? yadj old-yadj)))
					   (begin
					     ;; (print  "xadj: " xadj " yadj: " yadj "changed: "(eq? xadj old-xadj) " " (eq? yadj old-yadj))
					     (dboard:tabdat-view-changed-set! tabdat #t)
					     (dboard:tabdat-xadj-set! tabdat (* -2000 (- xadj 0.5)))
					     (dboard:tabdat-yadj-set! tabdat (*  2000 (- yadj 0.5)))
					     ))))
				   "iup:canvas action")))
		      #:wheel-cb  (lambda (obj step x y dir) ;; dir is 4 for up and 5 for down. I think.
				    (debug:catch-and-dump
				     (lambda ()
				       (let* ((drawing (dboard:tabdat-drawing tabdat))
					      (scalex  (vg:drawing-scalex drawing)))
					 (dboard:tabdat-view-changed-set! tabdat #t)
					 ;; (print "step: " step " x: " x " y: " y " dir: " dir " scalex: " scalex)
					 (vg:drawing-scalex-set! drawing
								 (+ scalex
								    (if (> step 0)
									(* scalex  0.02)
									(* scalex -0.02))))))
				     "wheel-cb"))
		      )))
       cnv-obj))))

;; run times canvas updater
;;
(define (dashboard:sysmon-canvas-updater commondat tabdat tab-num)
  (let ((cnv (dboard:tabdat-cnv tabdat))
	(dwg (dboard:tabdat-drawing tabdat))
	(mtx (dboard:tabdat-runs-mutex tabdat))
	(vch (dboard:tabdat-view-changed tabdat)))
    (if (and cnv dwg vch)
	(begin
	  (vg:drawing-xoff-set! dwg (dboard:tabdat-xadj tabdat))
	  (vg:drawing-yoff-set! dwg (dboard:tabdat-yadj tabdat))
	  (mutex-lock! mtx)
	  (canvas-clear! cnv)
	  (vg:draw dwg tabdat)
	  (mutex-unlock! mtx)
	  (dboard:tabdat-view-changed-set! tabdat #f)))))
  


;;======================================================================
;; R U N
;;======================================================================
;;
;; display and manage a single run at a time

(define (make-dashboard-buttons commondat) ;;  runs-sum-dat new-view-dat)
  (let* ((stats-dat       (dboard:tabdat-make-data))
	 (runs-dat        (dboard:tabdat-make-data))
	 (onerun-dat      (dboard:tabdat-make-data)) ;; name for run-summary structure 
	 (runcontrols-dat (dboard:tabdat-make-data))
	 (runtimes-dat    (dboard:tabdat-make-data))
	 (sysmon-dat      (dboard:tabdat-make-data))
	 (nruns           (dboard:tabdat-numruns runs-dat))
	 (ntests          (dboard:tabdat-num-tests runs-dat))
	 (keynames        (dboard:tabdat-dbkeys runs-dat))
	 (nkeys           (length keynames))
	 (runsvec         (make-vector nruns))
	 (header          (make-vector nruns))
	 (lftcol          (make-vector ntests))

			  (dashboard:summary commondat stats-dat tab-num: 0)
			  runs-view
			  (dashboard:runs-summary commondat onerun-dat tab-num: 2)
			  ;; (dashboard:new-view db data new-view-dat tab-num: 3)
			  (dashboard:run-controls commondat runcontrols-dat tab-num: 3)
			  (dashboard:run-times commondat runtimes-dat tab-num: 4)
			  ;; ;; (dashboard:runs-summary commondat onerun-dat tab-num: 4)
			  (dashboard:sysmon commondat sysmon-dat tab-num: 5)
			  additional-views
			  )))
	;; (set! (iup:callback tabs tabchange-cb:) (lambda (a b c)(print "SWITCHED TO TAB: " a " " b " " c)))
	(iup:attribute-set! tabs "TABTITLE0" "Summary")
	(iup:attribute-set! tabs "TABTITLE1" "Runs")
	(iup:attribute-set! tabs "TABTITLE2" "Run Summary")
	(iup:attribute-set! tabs "TABTITLE3" "Run Control")
	(iup:attribute-set! tabs "TABTITLE4" "Run Times")
	(iup:attribute-set! tabs "TABTITLE5" "Sysmon")
	;; (iup:attribute-set! tabs "TABTITLE3" "New View")
	;; (iup:attribute-set! tabs "TABTITLE4" "Run Control")

	;; set the tab names for user added tabs
	(for-each
	 (lambda (tab-info)
	   (iup:attribute-set! tabs (conc "TABTITLE" (car tab-info)) (cdr tab-info)))
	 additional-tabnames)
	
	(iup:attribute-set! tabs "BGCOLOR" "190 190 190")
	;; make the iup tabs object available (for changing color for example)
	(dboard:commondat-hide-not-hide-tabs-set! commondat tabs)
	;; now set up the tabdat lookup
	(dboard:common-set-tabdat! commondat 0 stats-dat)
	(dboard:common-set-tabdat! commondat 1 runs-dat)
	(dboard:common-set-tabdat! commondat 2 onerun-dat)
	(dboard:common-set-tabdat! commondat 3 runcontrols-dat)
	(dboard:common-set-tabdat! commondat 4 runtimes-dat)
	(dboard:common-set-tabdat! commondat 5 sysmon-dat)

	(iup:vbox
	 tabs
	 ;; controls
	 ))))
    (vector keycol lftcol header runsvec)))

((license "BSD")
 (category db)
 (dependencies autoload sql-null)
 (test-dependencies test)
 (components (extension dbi)))

;; -*- scheme -*-
(
; Your egg's license:
(license "BSD")

; Pick one from the list of categories (see below) for your egg and enter it
; here.
(category db)

; A list of eggs dbi depends on.  If none, you can omit this declaration
; altogether. If you are making an egg for chicken 3 and you need to use
; procedures from the `files' unit, be sure to include the `files' egg in the
; `needs' section (chicken versions < 3.4.0 don't provide the `files' unit).
; `depends' is an alias to `needs'.
(needs (autoload "3.0") sql-null)

; A list of eggs required for TESTING ONLY.  See the `Tests' section.
(test-depends test)

(author "Matt Welland")
(synopsis "An abstract database interface."))

(repo fossil "http://www.kiatoa.com/cgi-bin/fossils/{egg-name}")
(uri zip "http://www.kiatoa.com/cgi-bin/fossils/{egg-name}/zip/{egg-name}.zip?uuid={egg-release}")
(release "0.5")
(release "0.4")
(release "0.3")
(release "0.2")
(release "0.1")

;;; dbi: Minimal gasket to postgresql, sqlite3 and mysql
;;;
;; Copyright (C) 2007-2018 Matt Welland
;; Copyright (C) 2016 Peter Bex
;; Redistribution and use in source and binary forms, with or without
;; modification, is permitted.
;;
;; THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
;; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
;; ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
;; LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
;; CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
;; OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
;; BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
;; LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
;; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
;; USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
;; DAMAGE.

;; ONLY A LOWEST COMMON DEMOMINATOR IS SUPPORTED!

;; d = db handle
;; t = statement handle
;; s = statement
;; l = proc
;; p = params
;;
;;          sqlite3                    postgres                   dbi
;; prepare: (prepare d s)              n/a                        prepare (sqlite3, pg)
;; for-each (for-each-row l d s . p)   (query-for-each l s d)     for-each-row
;; for-each (for-each-row l t . p)     n/a                        NOT YET
;; exec     (exec d s . p)             (query-tuples s d)      
;; exec     (exec t . p)               n/a

;; set to 'pg or 'sqlite3
;; (define dbi:type 'sqlite3) ;; or 'pg
;;  (dbi:open 'sqlite3 (list (cons 'dbname fullname)))

;;======================================================================
;; D B I
;;======================================================================
(module dbi
    (open db-dbtype db-conn for-each-row get-one get-one-row get-rows
     exec close escape-string mk-db now database? with-transaction fold-row
     prepare map-row convert prepare-exec get-res

     ;; TODO: These don't really belong here.  Also, the naming is not
     ;; consistent with the usual Scheme conventions.
     pgdatetime-get-year pgdatetime-get-month pgdatetime-get-day
     pgdatetime-get-hour pgdatetime-get-minute pgdatetime-get-second
     pgdatetime-get-microsecond
     pgdatetime-set-year! pgdatetime-set-month! pgdatetime-set-day!
     pgdatetime-set-hour! pgdatetime-set-minute! pgdatetime-set-second!
     pgdatetime-set-microsecond!

     lazy-bool)

(import (chicken base) (chicken process) (chicken file) (chicken time) (chicken string) (chicken format) (chicken time posix) scheme srfi-1 srfi-13)
(import (chicken condition) autoload sql-null)

(define-record-type db
  (make-db dbtype dbconn)
  db?
  (dbtype db-dbtype  db-dbtype-set!)
  (dbconn db-conn    db-conn-set!))

(define (missing-egg type eggname)
  (lambda _
    (error (printf
               "Cannot access ~A databases.  Please install the ~S egg and try again." type eggname))))

;; (define (sqlite3:statement? h) #f) ;; dummy - hope it gets clobbered if sqlite3 gets loaded

;; TODO: Make a convenience macro for this?
(define sqlite3-missing (missing-egg 'sqlite3 "sqlite3"))
(autoload sqlite3
          (open-database sqlite3:open-database sqlite3-missing)
          (for-each-row sqlite3:for-each-row sqlite3-missing)
          (execute sqlite3:execute sqlite3-missing)
          (with-transaction sqlite3:with-transaction sqlite3-missing)
          (finalize! sqlite3:finalize! sqlite3-missing)
          (make-busy-timeout sqlite3:make-busy-timeout sqlite3-missing)
          (set-busy-handler! sqlite3:set-busy-handler! sqlite3-missing)
          (database? sqlite3:database? sqlite3-missing)
          (prepare sqlite3:prepare sqlite3-missing)
          (fold-row sqlite3:fold-row sqlite3-missing)
          (map-row sqlite3:map-row sqlite3-missing)
          (statement? sqlite3:statement? sqlite3-missing))

(define sql-de-lite-missing (missing-egg 'sql-de-lite "sql-de-lite"))
(autoload sql-de-lite
          (open-database     sql:open-database     sql-de-lite-missing)
	  (close-database    sql:close-database    sql-de-lite-missing)
          (for-each-row      sql:for-each-row      sql-de-lite-missing)
	  (fold-rows         sql:fold-rows         sql-de-lite-missing)
          (exec              sql:exec              sql-de-lite-missing)
	  (fetch-value       sql:fetch-value       sql-de-lite-missing)
	  (with-transaction  sql:with-transaction  sql-de-lite-missing)
          (finalize!         sql:finalize!         sql-de-lite-missing)
          (make-busy-timeout sql:make-busy-timeout sql-de-lite-missing)
          (set-busy-handler! sql:set-busy-handler! sql-de-lite-missing)
	  (query             sql:query             sql-de-lite-missing)
	  (sql               sql:sql               sql-de-lite-missing))

(define pg-missing (missing-egg 'pg "postgresql"))
(autoload postgresql
          (connect pg:connect pg-missing)
          (row-for-each pg:row-for-each pg-missing)
          (with-transaction pg:with-transaction pg-missing)
          (query pg:query pg-missing)
          ;;(escape-string pg:escape-string pg-missing)
          (disconnect pg:disconnect pg-missing)
          (connection? pg:connection? pg-missing)
          (row-fold pg:row-fold pg-missing)
          (row-map pg:row-map pg-missing)
          (affected-rows pg:affected-rows pg-missing)
          (result? pg:result? pg-missing))

(define mysql-missing (missing-egg 'mysql "mysql-client"))
(autoload mysql-client 
  (make-mysql-connection mysql:make-connection mysql-missing)
  (mysql-null? mysql:mysql-null? mysql-missing))

(define (open dbtype dbinit)
  (make-db
   dbtype
   (case dbtype
     ((sqlite3)     (sqlite3:open-database (alist-ref 'dbname dbinit)))
     ((sql-de-lite) (sql:open-database (alist-ref 'dbname dbinit)))
     ((pg)          (pg:connect dbinit))
     ((mysql)       (mysql:make-connection (alist-ref 'host dbinit)
					   (alist-ref 'user dbinit)
					   (alist-ref 'password dbinit)
					   (alist-ref 'dbname dbinit)
					   port: (alist-ref 'port dbinit)))
     (else (error "Unsupported dbtype " dbtype)))))

(define (convert dbh)
  (cond
    ((database? dbh)           dbh) 
    ((sqlite3:database? dbh)   (make-db 'sqlite3 dbh))
    ((pg:connection? dbh)      (make-db 'pg dbh))
    ((not mysql:mysql-null?)   (make-db 'mysql dbh))
    (else (error "Unsupported database handle " dbh))))

(define (for-each-row proc dbh stmt . params)
    (let ((dbtype (db-dbtype dbh))
	  (conn    (db-conn dbh)))
      (case dbtype
        ((sqlite3) (sqlite3:for-each-row 
                    (lambda (first . remaining)
                      (let ((tuple (list->vector (cons first remaining))))
                        (proc tuple)))
                    conn
                    (apply sqlparam stmt params)))
	((sql-de-lite)(apply sql:query (sql:for-each-row
					(lambda (row)
					  (proc (list->vector row))))
			     (sql:sql conn stmt)
			     params))
        ((pg) (pg:row-for-each
               (lambda (tuple)
                 (proc (list->vector tuple)))
               (pg:query conn (apply sqlparam stmt params))))
        ((mysql) (let* ((replaced-sql (apply sqlparam stmt params))
                        (fetcher (conn replaced-sql)))
                   (fetcher (lambda (tuple)
                              (proc (list->vector tuple))))))
        (else (error "Unsupported dbtype " dbtype)))))

;; common idiom is to seek a single value, #f if no match
;; NOTE: wish to return first found. Do the set only if not set
(define (get-one dbh stmt . params)
  (let ((dbtype (db-dbtype dbh))
	(conn    (db-conn dbh)))
    (case dbtype
      ((sql-de-lite)
       (apply sql:query sql:fetch-value (sql:sql conn stmt) params))
      (else 
        (let ((res #f))
	  (apply for-each-row
		 (lambda (row)
		   (if (not res)
		       (set! res (vector-ref row 0))))
		 dbh
		 stmt 
		 params)
	  res)))))

;; common idiom is to seek a single value, #f if no match
;; NOTE: wish to return first found. Do the set only if not set
(define (get-one-row dbh stmt . params)
  (let ((res #f))
    (apply for-each-row
	   (lambda (row)
	     (if (not res)
	         (set! res row)))
	   dbh
	   stmt 
	   params)
    res))

;; common idiom is to seek a list of rows, '() if no match
(define (get-rows dbh stmt . params)
  (let ((res '()))
    (apply for-each-row
	   (lambda (row)
	     (set! res (cons row res)))
	   dbh
	   stmt 
	   params)
    (reverse res)))

(define (exec dbh stmt . params)
    (let ((dbtype (db-dbtype dbh))
      	 (conn   (db-conn dbh))
      	 (junk   #f))
          (case dbtype
            ((sqlite3) (apply sqlite3:execute conn stmt params))
            ((sql-de-lite)(apply sql:exec (sql:sql conn stmt) params))
            ((pg) (pg:query conn (apply sqlparam stmt params)))
            ((mysql) (conn (apply sqlparam stmt params)))
            (else (error "Unsupported dbtype " dbtype)))))

(define (with-transaction dbh proc)
  (let ((dbtype (db-dbtype dbh))
  (conn   (db-conn dbh)))
    (case dbtype
      ((sql-de-lite)(sql:with-transaction conn proc))
      ((sqlite3) (sqlite3:with-transaction
                  conn
                  (lambda () (proc))))
      ((pg) (pg:with-transaction
             conn (lambda () (proc))))
      ((mysql) 
        (conn "START TRANSACTION")
        (conn proc)
        (conn "COMMIT"))
      (else (error "Unsupported dbtype " dbtype)))))

(define (prepare dbh stmt)
  (let ((dbtype (db-dbtype dbh))
  (conn   (db-conn dbh)))
    (case dbtype
      ((sql-de-lite) dbh) ;; nop?
      ((sqlite3) (sqlite3:prepare conn stmt))
      ((pg) (exec dbh stmt) (cons (cons dbh (cadr (string-split stmt))) '()))
      ((mysql) (print "WIP"))
      (else (error "Unsupported dbtype" dbtype)))))

(define (fold-row proc init dbh stmt . params) ;; expecting (proc init/prev res)
  (let ((dbtype (db-dbtype dbh))
  (conn   (db-conn dbh)))
    (case dbtype
      ((sql-de-lite) (apply sql:query (sql:fold-rows proc init)
			    (sql:sql conn stmt) params))
      ((sqlite3)     (let ((newproc (lambda (prev . rem)
				      (proc rem prev))))
		       (apply sqlite3:fold-row newproc init conn stmt params))) ;; (fold-row PROC INIT DATABASE SQL . PARAMETERS)
      ((pg)          (pg:row-fold proc init (exec dbh stmt params)))
      ((mysql)       (fold proc '() (get-rows dbh stmt)))
      (else          (error "Unsupported dbtype" dbtype)))))

(define (map-row proc init dbh stmt . params)
  (let ((dbtype (db-dbtype dbh))
  (conn   (db-conn dbh)))
    (case dbtype
      ((sqlite3) (apply sqlite3:map-row proc conn stmt params))
      ((pg) (pg:row-map proc (exec dbh stmt params)))
      ((mysql) (map proc (get-rows dbh stmt)))
      (else (error "Unsupported dbtype" dbtype)))))

(define (prepare-exec stmth . params)
  (if (sqlite3:statement? stmth)
        (apply sqlite3:execute stmth params))
  (if (pair? stmth)
    (let* ((dbh (car (car stmth)))
          (dbtype (db-dbtype dbh))
          (conn   (db-conn dbh))
          (stmth-name (string->symbol (cdr (car stmth)))))
        (apply pg:query conn stmth-name params))))

(define (get-res handle option)
  (if (pg:result? handle)
      (case option
        ((affected-rows) (pg:affected-rows handle)))))
      
(define (close dbh)
  (cond
   ((database? dbh)
    (let ((dbtype (db-dbtype dbh))
 	  (conn   (db-conn dbh)))
      (case dbtype
	((sql-de-lite) (sql:close-database conn))
	((sqlite3)     (sqlite3:finalize! conn)) 
	((pg)          (pg:disconnect conn))
	((mysql)       (void)) ; The mysql-client egg doesn't support closing...
	(else (error "Unsupported dbtype " dbtype)))))
   ((pair? dbh)
    (let ((stmt (conc "DEALLOCATE " (cdr (car dbh)) ";")))
      (exec (car (car dbh)) stmt)))
   ((sqlite3:statement? dbh) ;; do this last so that *IF* it is a proper dbh it will be closed above and the sqlite3:statement? will not be called
    (sqlite3:finalize! dbh))
   
   ))

;;======================================================================
;; D B   M I S C
;;======================================================================

(define (escape-string str)
      (let ((parts (split-string str "'")))
	(string-intersperse parts "''")))
;;      (pg:escape-string val)))

;; convert values to appropriate strings
;;
(define (sqlparam-val->string val)
  (cond
   ((list?   val)(string-intersperse (map conc val) ",")) ;; (a b c) => a,b,c
   ((string? val)(string-append "'" (escape-string val) "'"))
   ((sql-null? val) "NULL")
   ((number? val)(number->string val))
   ((symbol? val)(sqlparam-val->string (symbol->string val)))
   ((boolean? val)
    (if val "TRUE" "FALSE"))  ;; should this be "TRUE" or 1?
                              ;; should this be "FALSE" or 0 or NULL?
   ((vector? val) ;; 'tis a date NB// 5/29/2011 - this is badly borked BUGGY!
    (sqlparam-val->string (time->string (seconds->local-time (current-seconds)))))
   (else
    (error "sqlparam: unknown type for value: " val)
    "")))

;; (sqlparam "INSERT INTO foo(name,age) VALUES(?,?);" "bob" 20)
;; NB// 1. values only!! 
;;      2. terminating semicolon required (used as part of logic)
;;
;; a=? 1 (number) => a=1
;; a=? 1 (string) => a='1'
;; a=? #f         => a=FALSE 
;; a=? a (symbol) => a=a 
;;
(define (sqlparam query . args)
  (let* ((query-parts (string-split query "?"))
         (num-parts    (length query-parts))
         (num-args    (length args)))
    (if (not (= (+ num-args 1) num-parts))
        (error "ERROR, sqlparam: wrong number of arguments or missing semicolon, " num-args " for query " query)
        (if (= num-args 0) query
            (let loop ((section (car query-parts))
                       (tail    (cdr query-parts))
                       (result  "")
                       (arg     (car args))
                       (argtail (cdr args)))
              (let* ((valstr    (sqlparam-val->string arg))
                     (newresult (string-append result section valstr)))
                (if (null? argtail) ;; we are done
                    (string-append newresult (car tail))
                    (loop
                     (car tail)
                     (cdr tail)
                     newresult
                     (car argtail)
                     (cdr argtail)))))))))

;; a poorly written but non-broken split-string
;;
(define (split-string strng delim)
  (if (eq? (string-length strng) 0) (list strng)
      (let loop ((head (make-string 1 (car (string->list strng))))
		 (tail (cdr (string->list strng)))
		 (dest '())
		 (temp ""))
	(cond ((equal? head delim)
	       (set! dest (append dest (list temp)))
	       (set! temp ""))
	      ((null? head) 
	       (set! dest (append dest (list temp))))
	      (else (set! temp (string-append temp head)))) ;; end if
	(cond ((null? tail)
	       (set! dest (append dest (list temp))) dest)
	      (else (loop (make-string 1 (car tail)) (cdr tail) dest temp))))))

(define (database? dbh)
  (if (db? dbh)
    (let ((dbtype (db-dbtype dbh))
    (conn   (db-conn dbh)))
      (case dbtype
        ((sqlite3)     (if (sqlite3:database? conn) #t #f))
	((sql-de-lite) #t) ;; don't know how to test for database
        ((pg) (if (pg:connection? conn) #t #f))
        ((mysql) #t)
        (else (error "Unsupported dbtype " dbtype)))) #f))

;;======================================================================
;; Convienence routines
;;======================================================================

;; make a db from a list of statements or open it if it already exists
(define (mk-db path file stmts)
  (let* ((fname    (conc path "/" file))
	 (dbexists (file-exists? fname))
	 (dbh      (if dbexists (open 'sqlite3 (list (cons 'dbname fname))) #f)))
    (if (not dbexists)
	(begin
	  (system (conc "mkdir -p " path)) ;; create the path
	  (set! dbh (open 'sqlite3 (list (cons 'dbname fname))))
	  (for-each 
	   (lambda (sqry)
	     (exec dbh sqry))
	   stmts)))
    (sqlite3:set-busy-handler!
     (db-conn dbh) (sqlite3:make-busy-timeout 1000000))
    dbh))

(define (now dbh)
  (let ((dbtype (db-dbtype dbh)))
    (case dbtype
      ((sqlite3) "datetime('now')")
      ;; Standard SQL
      (else      "now()"))))

(define (make-pgdatetime)(make-vector 7))
(define (pgdatetime-get-year          vec)    (vector-ref  vec 0))
(define (pgdatetime-get-month         vec)    (vector-ref  vec 1))
(define (pgdatetime-get-day           vec)    (vector-ref  vec 2))
(define (pgdatetime-get-hour          vec)    (vector-ref  vec 3))
(define (pgdatetime-get-minute        vec)    (vector-ref  vec 4))
(define (pgdatetime-get-second        vec)    (vector-ref  vec 5))
(define (pgdatetime-get-microsecond   vec)    (vector-ref  vec 6))
(define (pgdatetime-set-year!         vec val)(vector-set! vec 0 val))
(define (pgdatetime-set-month!        vec val)(vector-set! vec 1 val))
(define (pgdatetime-set-day!          vec val)(vector-set! vec 2 val))
(define (pgdatetime-set-hour!         vec val)(vector-set! vec 3 val))
(define (pgdatetime-set-minute!       vec val)(vector-set! vec 4 val))
(define (pgdatetime-set-second!       vec val)(vector-set! vec 5 val))
(define (pgdatetime-set-microsecond!  vec val)(vector-set! vec 6 val))

;; takes postgres date or timestamp
(define (pg-date->string pgdate)
  (conc (pgdatetime-get-month pgdate) "/"
	(pgdatetime-get-day   pgdate) "/"
	(pgdatetime-get-year  pgdate)))

;; takes postgres date or timestamp
(define (pg-datetime->string pgdate)
  (conc (pgdatetime-get-month pgdate) "/"
        (pgdatetime-get-day   pgdate) "/"
        (pgdatetime-get-year  pgdate) " "
	(pgdatetime-get-hour  pgdate) ":"
	(pgdatetime-get-minute pgdate)`))



;; map to 0 or 1 from a range of values
;;            #f => 0
;;            #t => 1
;;           "0" => 0
;;           "1" => 1
;;         FALSE => 0
;;          TRUE => 1
;; anything else => 1
(define (lazy-bool val)
  (case val
   ((#f) 0)
   ((#t) 1)
   ((0)  0)
   ((1)  1)
   (else
    (cond
     ((string? val)
      (let ((nval (string->number val)))
	(if nval 
	    (lazy-bool nval)
	    (cond
	     ((string=? val "FALSE") 0)
	     ((string=? val "TRUE")  1)
	     (else 1)))))
     ((symbol? val)
      (lazy-bool (symbol->string val)))
     (else 1)))))
)

;; Copyright 2007-2018, Matthew Welland.
;;
;;  This program is made available under the GNU GPL version 2.0 or
;;  greater. See the accompanying file COPYING for details.
;;
;;  This program is distributed WITHOUT ANY WARRANTY; without even the
;;  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;;  PURPOSE.

;;;; dbi.setup
(standard-extension 'dbi "0.5")

;;; dbi: Minimal gasket to postgresql, sqlite3 and mysql
;;;
;; Copyright (C) 2007-2016 Matt Welland
;; Redistribution and use in source and binary forms, with or without
;; modification, is permitted.
;;
;; THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
;; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
;; ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
;; LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
;; CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
;; OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
;; BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
;; LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
;; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
;; USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
;; DAMAGE.

;; WARNING: This example is basically useless, I'll rewrite it one of these days ....

(require-library margs dbi)

(define help "help me")

(define remargs (args:get-args 
		 (argv)
		 (list "-inf")
		 (list "-h")
		 args:arg-hash
		 0))

;; define DBPATH in setup.scm
(include "setup.scm")

(define (ftf:mk-db)
  (let* ((fname    (conc DBPATH "/ftfplan.db"))
 	 (dbexists (file-exists? fname))
	 (dbh      (if dbexists (dbi:open 'sqlite3 (list (cons 'dbname fname))) #f)))
    (if (not dbexists)
	(begin
	  ;; (print "fullname: " fullname)
	  (system (conc "mkdir -p " DBPATH)) ;; create the path
	  (set! dbh (dbi:open 'sqlite3 (list (cons 'dbname fname))))
	  (for-each 
	   (lambda (sqry)
	     ;; (print sqry)
	     (dbi:exec dbh sqry))
	   ;; types: 0 text, 1 jpg, 2 png, 3 svg, 4 spreadsheet, 5 audio, 6 video :: better specs to come...
	   (list
	    "CREATE TABLE pics     (id INTEGER PRIMARY KEY,name TEXT,dat_id INTEGER,thumb_dat_id INTEGER,created_on INTEGER,owner_id INTEGER);"
	    "CREATE TABLE dats     (id INTEGER PRIMARY KEY,md5sum TEXT,dat BLOB,type INTEGER);"
	     ;; on every modification a new tiddlers entry is created. When displaying the tiddlers do:
	     ;;    select where created_on < somedate order by created_on desc limit 1
	     "CREATE TABLE tiddlers (id INTEGER PRIMARY KEY,wiki_id INTEGER,name TEXT,rev INTEGER,dat_id INTEGER,created_on INTEGER,owner_id INTEGER);"
	     ;; rev and tag only utilized when user sets a tag. All results from a select as above for tiddlers are set to the tag
	     "CREATE TABLE revs     (id INTEGER PRIMARY KEY,tag TEXT);"
	     ;; wikis is here for when postgresql support is added or if a sub wiki is created. 
	     "CREATE TABLE wikis    (id INTEGER PRIMARY KEY,key_name TEXT,title TEXT,created_on INTEGER);"))
             ))
    dbh))

(define db (ftf:mk-db))

(dbi:exec db "INSERT INTO pics (name,owner_id) VALUES ('bob',1);")
(dbi:for-each-row (lambda (row)(print "Name: " (vector-ref row 0) ", owner_id: " (vector-ref row 1)))
   db
   "SELECT name,owner_id FROM pics;")

(import (prefix sqlite3 sqlite3:)
	posix typed-records srfi-18 srfi-69 format ports srfi-1
	matchable (prefix iup iup:)
	canvas-draw
	;; blindly copied from megamod
	(prefix base64 base64:)
	(prefix dbi dbi:)
	(prefix nanomsg nmsg:)
	;; (prefix nanomsg nmsg:)
	(prefix sqlite3 sqlite3:)
	call-with-environment-variables
	csv
	csv-xml
	data-structures
	directory-utils
	dot-locking

all : module-hierarchy.pdf

deps.data : ../../*scm
	cd ../..;csi -bq utils/deps.scm > docs/code/deps.data

module-hierarchy.dot : preamble.dot deps.data postamble.dot
	cat preamble.dot deps.data postamble.dot > module-hierarchy.dot

module-hierarchy.pdf : module-hierarchy.dot
	dot -Tpdf module-hierarchy.dot -o module-hierarchy.pdf

  node [shape=box,style=filled,fontname="clear",fontsize="10"];

  subgraph cluster_megatest {
    label="megatest";

    rmtmod [label="rmt mod"];
    // httpmod [label="http-transportmod"];
    // commonmod
// archivemod.scm
"commonmod" -> "archivemod";
// clientmod.scm
"commonmod" -> "clientmod";
// configfmod.scm
// subrunmod.scm
"commonmod" -> "subrunmod";
// ezstepsmod.scm
"commonmod" -> "ezstepsmod";
// itemsmod.scm
"commonmod" -> "itemsmod";
// gutilsmod.scm
// template-mod.scm
"sqlite3" -> "template-mod";
"commonmod" -> "template-mod";
// http-transportmod.scm
"commonmod" -> "http-transportmod";
"stml2" -> "http-transportmod";
"apimod" -> "http-transportmod";
"dbmod" -> "http-transportmod";
"testsmod" -> "http-transportmod";
"mtargs" -> "http-transportmod";
"mtconfigf" -> "http-transportmod";
// apimod.scm
"sqlite3" -> "apimod";
"commonmod" -> "apimod";
"dbmod" -> "apimod";
"servermod" -> "apimod";
// launchmod.scm
"sqlite3" -> "launchmod";
"commonmod" -> "launchmod";
// keysmod.scm
"sqlite3" -> "keysmod";
"srfi-13" -> "keysmod";
// testsmod.scm
"sqlite3" -> "testsmod";
"commonmod" -> "testsmod";
"servermod" -> "testsmod";
"itemsmod" -> "testsmod";
"dbmod" -> "testsmod";
// runconfigmod.scm
"commonmod" -> "runconfigmod";
// keysmod.scm
"srfi-13" -> "keysmod";
// launchmod.scm
"commonmod" -> "launchmod";
"mtconfigf" -> "testsmod";
"mtargs" -> "testsmod";
// vgmod.scm
"sqlite3" -> "vgmod";
// clientmod.scm
"sqlite3" -> "clientmod";
"commonmod" -> "clientmod";
// megamod.scm
"mtconfigf" -> "megamod";
"spiffy" -> "megamod";
"stml2" -> "megamod";
"mtargs" -> "megamod";
"commonmod" -> "megamod";
"keysmod" -> "megamod";
"pgdbmod" -> "megamod";
"tasksmod" -> "megamod";
"dbmod" -> "megamod";
"apimod" -> "megamod";
"ducttape-lib" -> "megamod";
"itemsmod" -> "megamod";
"pkts" -> "megamod";
"rmtmod" -> "megamod";
"mtmod" -> "megamod";
"testsmod" -> "megamod";
"servermod" -> "megamod";
"subrunmod" -> "megamod";
"itemsmod" -> "megamod";
"runsmod" -> "megamod";
// odsmod.scm
"commonmod" -> "odsmod";
// envmod.scm
"commonmod" -> "envmod";
// http-transportmod.scm
"commonmod" -> "http-transportmod";
"stml2" -> "http-transportmod";
"apimod" -> "http-transportmod";
"dbmod" -> "http-transportmod";
"testsmod" -> "http-transportmod";
// processmod.scm
// subrunmod.scm
"sqlite3" -> "subrunmod";
"commonmod" -> "subrunmod";
"mtconfigf" -> "subrunmod";
// tasksmod.scm
"sqlite3" -> "tasksmod";
"commonmod" -> "tasksmod";
"mtconfigf" -> "tasksmod";
"pgdbmod" -> "tasksmod";
// dbmod.scm
"sqlite3" -> "dbmod";
"commonmod" -> "dbmod";
"keysmod" -> "dbmod";
"files" -> "dbmod";
"tasksmod" -> "dbmod";
"odsmod" -> "dbmod";
"mtargs" -> "dbmod";
"mtconfigf" -> "dbmod";
// servermod.scm
"sqlite3" -> "servermod";
"commonmod" -> "servermod";
"dbmod" -> "servermod";
"tasksmod" -> "servermod";
"mtargs" -> "servermod";
"mtconfigf" -> "servermod";
// ezstepsmod.scm
"sqlite3" -> "ezstepsmod";
"commonmod" -> "ezstepsmod";
// odsmod.scm
"sqlite3" -> "odsmod";
"commonmod" -> "odsmod";
// mtmod.scm
"sqlite3" -> "mtmod";
"mtargs" -> "mtmod";
"mtconfigf" -> "mtmod";
"commonmod" -> "mtmod";
"dbmod" -> "mtmod";
"pgdbmod" -> "mtmod";
"rmtmod" -> "mtmod";
"servermod" -> "mtmod";
"stml2" -> "mtmod";
"subrunmod" -> "mtmod";
"tasksmod" -> "mtmod";
"testsmod" -> "mtmod";
// pgdbmod.scm
"commonmod" -> "pgdbmod";
// treemod.scm
"iup" -> "treemod";
// itemsmod.scm
"sqlite3" -> "itemsmod";
"commonmod" -> "itemsmod";
// runsmod.scm
"base64" -> "runsmod";
"commonmod" -> "runsmod";
"dbmod" -> "runsmod";
"itemsmod" -> "runsmod";
"mtmod" -> "runsmod";
"pgdbmod" -> "runsmod";
"mtargs" -> "runsmod";
"mtconfigf" -> "runsmod";
"rmtmod" -> "runsmod";
"servermod" -> "runsmod";
"stml2" -> "runsmod";
"subrunmod" -> "runsmod";
"tasksmod" -> "runsmod";
"testsmod" -> "runsmod";
// apimod.scm
// processmod.scm
"commonmod" -> "apimod";
"dbmod" -> "apimod";
"sqlite3" -> "processmod";
"servermod" -> "apimod";
// dbmod.scm
// rmtmod.scm
"commonmod" -> "dbmod";
"keysmod" -> "dbmod";
"files" -> "dbmod";
"sqlite3" -> "rmtmod";
"tasksmod" -> "dbmod";
"odsmod" -> "dbmod";
// dcommonmod.scm
"gutilsmod" -> "dcommonmod";
"commonmod" -> "dcommonmod";
"testsmod" -> "dcommonmod";
"megamod" -> "dcommonmod";
"canvas-draw" -> "dcommonmod";
"canvas-draw-iup" -> "dcommonmod";
// tasksmod.scm
"commonmod" -> "tasksmod";
"pgdbmod" -> "tasksmod";
// template-mod.scm
"commonmod" -> "template-mod";
// servermod.scm
"commonmod" -> "servermod";
"dbmod" -> "servermod";
"tasksmod" -> "servermod";
// treemod.scm
// commonmod.scm
"pkts" -> "commonmod";
// vgmod.scm
// rmtmod.scm
"ulex" -> "rmtmod";
"commonmod" -> "rmtmod";
"itemsmod" -> "rmtmod";
"apimod" -> "rmtmod";
"dbmod" -> "rmtmod";
// commonmod.scm
"sqlite3" -> "commonmod";
"pkts" -> "commonmod";
"mtconfigf" -> "commonmod";
"mtargs" -> "commonmod";
// pgdbmod.scm
"mtconfigf" -> "pgdbmod";
"mtargs" -> "pgdbmod";
"commonmod" -> "pgdbmod";
// envmod.scm
"sqlite3" -> "envmod";
"commonmod" -> "envmod";
// configfmod.scm
"sqlite3" -> "configfmod";
// dcommonmod.scm
"sqlite3" -> "dcommonmod";
"mtconfigf" -> "dcommonmod";
"gutilsmod" -> "dcommonmod";
"commonmod" -> "dcommonmod";
"servermod" -> "dcommonmod";
"testsmod" -> "dcommonmod";
"megamod" -> "dcommonmod";
"subrunmod" -> "dcommonmod";
"runsmod" -> "dcommonmod";
"rmtmod" -> "dcommonmod";
"dbmod" -> "dcommonmod";
"canvas-draw" -> "dcommonmod";
"canvas-draw-iup" -> "dcommonmod";
"iup" -> "dcommonmod";
"mtargs" -> "dcommonmod";
// gutilsmod.scm
"iup" -> "gutilsmod";
"canvas-draw" -> "gutilsmod";
// runconfigmod.scm
"sqlite3" -> "runconfigmod";
"commonmod" -> "runconfigmod";
// archivemod.scm
"sqlite3" -> "archivemod";
"commonmod" -> "archivemod";
    
}
  
}

    
}
  
}

//  Copyright 2006-2017, Matthew Welland.
// 
// This file is part of Megatest.
// 
//     Megatest is free software: you can redistribute it and/or modify
//     it under the terms of the GNU General Public License as published by
//     the Free Software Foundation, either version 3 of the License, or
//     (at your option) any later version.
// 
//     Megatest is distributed in the hope that it will be useful,
//     but WITHOUT ANY WARRANTY; without even the implied warranty of
//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//     GNU General Public License for more details.
// 
//     You should have received a copy of the GNU General Public License
//     along with Megatest.  If not, see <http://www.gnu.org/licenses/>.
// 
digraph megatest_code_hierarchy {
  ranksep=0.05;
  // rankdir=LR

  node [shape=box,style=filled,fontname="clear",fontsize="10"];

  subgraph cluster_megatest {
    label="megatest";

    rmtmod [label="rmt mod"];

(declare (unit envmod))
(declare (uses commonmod))

(module envmod
	*
	
(import scheme chicken data-structures extras)
(import (prefix sqlite3 sqlite3:) posix typed-records srfi-18 srfi-69 format ports srfi-1 matchable)
(import scheme (chicken base))
(import (prefix sqlite3 sqlite3:) typed-records srfi-18 srfi-69 format (chicken port) srfi-1 matchable)
(import commonmod)
;; (use (prefix ulex ulex:))

(include "common_records.scm")


)

(declare (unit ezstepsmod))
(declare (uses commonmod))

(module ezstepsmod
	*
	
(import scheme chicken data-structures extras)
(import (prefix sqlite3 sqlite3:) posix typed-records srfi-18 srfi-69 format ports srfi-1 matchable)
(import scheme (chicken base))
(import (prefix sqlite3 sqlite3:) typed-records srfi-18 srfi-69 format (chicken port) srfi-1 matchable)
(import commonmod)
;; (use (prefix ulex ulex:))

(include "common_records.scm")


)

(declare (uses mtargs))
(declare (uses mtconfigf))
(declare (uses testsmod))

(module apimod
	*
	
(import scheme chicken data-structures extras posix files
(import scheme (chicken base) (chicken file)
	srfi-13 srfi-18 spiffy http-client
	spiffy-directory-listing
	spiffy-request-vars tcp
	)
(import commonmod)
(import stml2)
(import apimod)

(declare (unit itemsmod))
(declare (uses commonmod))
(declare (uses mtconfigf))

(module itemsmod
	*
	
(import scheme chicken data-structures extras)
(use (prefix sqlite3 sqlite3:) posix typed-records srfi-18 srfi-69 format ports srfi-1 matchable)
(import scheme (chicken base))
(import (prefix sqlite3 sqlite3:) typed-records srfi-18 srfi-69 format (chicken port) srfi-1 matchable)
(import commonmod)
(import(prefix mtconfigf configf:))
;; (use (prefix ulex ulex:))

;; (include "common_records.scm")
;; (include "items-inc.scm")

;;======================================================================

(declare (unit keysmod))

(module keysmod
	*
	
(import scheme chicken data-structures extras)
(import (prefix sqlite3 sqlite3:) posix typed-records srfi-18 srfi-69 format ports srfi-1 matchable)
(import scheme (chicken base) )
(import (prefix sqlite3 sqlite3:) typed-records srfi-18 srfi-69 format (chicken port) srfi-1 matchable)
;; (import commonmod)

;; (use (prefix ulex ulex:))
(import srfi-13)

;; (include "common_records.scm")

(module megamod
	*
	
(import scheme chicken data-structures extras)
(use 
 (prefix base64 base64:)
 (prefix dbi dbi:)
 (prefix nanomsg nmsg:)
;; (prefix nanomsg nmsg:)
 (prefix sqlite3 sqlite3:)
 call-with-environment-variables
 csv
 csv-xml
 data-structures
 directory-utils
 dot-locking

;; (include "megatest-version.scm")

;; fake out readline usage of toplevel-command
(define (toplevel-command . a) #f)

(use (prefix sqlite3 sqlite3:) srfi-1 posix regex regex-case srfi-69 (prefix base64 base64:)
     readline apropos json http-client directory-utils typed-records
     http-client srfi-18 extras format)
     http-client srfi-18 extras format tcp6)

;; Added for csv stuff - will be removed
;;
(use sparse-vectors)

(declare (uses mtargs))
(declare (uses mtconfigf))

     usage
     get-args
     print-args
     any-defined?
     help
     )

(import scheme chicken data-structures extras posix ports files)
(use srfi-69 srfi-1)
(import scheme (chicken base) (chicken port) (chicken file) (chicken process-context))
(import srfi-69 srfi-1)

(define arg-hash (make-hash-table))
(define help "")

(define (get-arg arg . default)
  (if (null? default)
      (hash-table-ref/default arg-hash arg #f)

	 get-eval-string
         squelch-debug-prints
	 ;; misc
	 realpath
	 find-chicken-lib
         )

(import scheme chicken data-structures extras ports files)
(use posix typed-records srfi-18 pathname-expand posix-extras)
(use regex regex-case srfi-69 srfi-1 directory-utils extras srfi-13 )
(use srfi-69)
(import posix)
(import scheme (chicken base) (chicken string) (chicken file) (chicken port))
(import typed-records srfi-18 pathname-expand)
(import regex regex-case srfi-69 srfi-1 directory-utils srfi-13 )
(import (chicken io) (chicken condition) (chicken process-context))
(import (chicken process) (chicken pathname) (chicken pretty-print) (chicken time))
(import srfi-69 (chicken platform) (chicken sort))

;; stub debug printers overridden by set-debug-printers
(define (debug:print n e . args)
  (apply print args))
(define (debug:print-info n e . args)
  (apply print "INFO: " args))
(define (debug:print-error n e . args)
  (apply print "ERROR: " args))

;;(import (prefix mtdebug debug:))
;;(define args:any? args:any-defined?) ;; cannot name it any? in mtargs module


;; FROM common.scm
;;
;; this plugs a hole in posix-extras in recent chicken versions > 4.9)
(let-values (( (chicken-release-number chicken-major-version)
               (apply values
                      (map string->number
                           (take
                            (string-split (chicken-version) ".")
                            2)))))
  (if (or (> chicken-release-number 4)
	  (and (eq? 4 chicken-release-number) (> chicken-major-version 9)))
      (define ##sys#expand-home-path pathname-expand)))
;;;(let-values (( (chicken-release-number chicken-major-version)
;;;               (apply values
;;;                      (map string->number
;;;                           (take
;;;                            (string-split (chicken-version) ".")
;;;                            2)))))
;;;  (if (or (> chicken-release-number 4)
;;;	  (and (eq? 4 chicken-release-number) (> chicken-major-version 9)))
;;;      (define ##sys#expand-home-path pathname-expand)))


 ;;(define (set-verbosity v)(debug:set-verbosity v))

 (define *default-log-port* (current-error-port))

 (define (debug:print-error n . args) ;;; n available to end-users but ignored for

  (if (substring-index ":" key) ;; variables containing : are for internal use and cannot be environment variables.
      (debug:print-error 4 *default-log-port* "skip setting internal use only variables containing \":\"")
      (if (and (string? val)
	       (string? key))
	  (handle-exceptions
	      exn
	      (debug:print-error 0 *default-log-port* "bad value for setenv, key=" key ", value=" val)
	    (setenv key val))
	    (set-environment-variable! key val))
	  (debug:print-error 0 *default-log-port* "bad value for setenv, key=" key ", value=" val))))

;; accept an alist or hash table containing envvar/env value pairs (value of #f causes unset) 
;;   execute thunk in context of environment modified as per this list
;;   restore env to prior state then return value of eval'd thunk.
;;   ** this is not thread safe **
(define (with-env-vars delta-env-alist-or-hash-table thunk)
  (let* ((delta-env-alist (if (hash-table? delta-env-alist-or-hash-table)
                              (hash-table->alist delta-env-alist-or-hash-table)
                              delta-env-alist-or-hash-table))
         (restore-thunks
          (filter
           identity
           (map (lambda (env-pair)
                  (let* ((env-var     (car env-pair))
                         (new-val     (let ((tmp (cdr env-pair)))
                                        (if (list? tmp) (car tmp) tmp)))
                         (current-val (get-environment-variable env-var))
                         (restore-thunk
                          (cond
                           ((not current-val) (lambda () (unsetenv env-var)))
                           ((not current-val) (lambda () (unset-environment-variable! env-var)))
                           ((not (string? new-val)) #f)
                           ((eq? current-val new-val) #f)
                           (else 
                            (lambda () (setenv env-var current-val))))))
                            (lambda () (set-environment-variable! env-var current-val))))))
                    ;;(when (not (string? new-val))
                    ;;    (debug:print 0 *default-log-port* " PROBLEM: not a string: "new-val"\n from env-alist:\n"delta-env-alist)
                    ;;    (pp delta-env-alist)
                    ;;    (exit 1))
                        
                    
                    (cond
                     ((not new-val)  ;; modify env here
                      (unsetenv env-var))
                      (unset-environment-variable! env-var))
                     ((string? new-val)
                      (setenv env-var new-val)))
                      (set-environment-variable! env-var new-val)))
                    restore-thunk))
                delta-env-alist))))
    (let ((rv (thunk)))
      (for-each (lambda (x) (x)) restore-thunks) ;; restore env to original state
      rv)))

(define (cmd-run->list cmd #!key (delta-env-alist-or-hash-table '()))

				       (loop (configf:read-line inp res (calc-allow-system allow-system curr-section-name sections) settings)
					     curr-section-name #f #f)))
	       (configf:script-rx ( x include-script params);; handle-exceptions
                                  ;;    exn
                                  ;;    (begin
                                  ;;      (debug:print '(0 2 9) #f "INFO: include from script " include-script " failed.")
                                  ;;      (loop (configf:read-line inp res (calc-allow-system allow-system curr-section-name sections) settings) curr-section-name #f #f))
                                  (if (and (safe-file-exists? include-script)(file-execute-access? include-script))
                                  (if (and (safe-file-exists? include-script)(file-executable? include-script))
                                      (let* ((local-allow-system  (calc-allow-system allow-system curr-section-name sections))
                                             (env-delta  (cfgdat->env-alist curr-section-name res local-allow-system))
                                             (new-inp-port
                                              (with-env-vars
                                               env-delta
                                               (lambda ()
                                                 (open-input-pipe (conc include-script " " params))))))

;;
(define (find-and-read-config fname #!key (environ-patt #f)(given-toppath #f)(pathenvvar #f)(set-fields #f)(keep-filenames #f))
  (let* ((curr-dir   (current-directory))
         (configinfo (find-config fname toppath: given-toppath))
	 (toppath    (car configinfo))
	 (configfile (cadr configinfo)))
    (if toppath (change-directory toppath)) 
    (if (and toppath pathenvvar)(setenv pathenvvar toppath))
    (if (and toppath pathenvvar)(set-environment-variable! pathenvvar toppath))
    (let ((configdat  (if configfile 
			  (read-config configfile #f #t environ-patt: environ-patt
				       post-section-procs: (if set-fields (list (cons "^fields$" set-fields)   ) '())
				       #f
                                       keep-filenames: keep-filenames))))
      (if toppath (change-directory curr-dir))
      (list configdat toppath configfile fname))))

;; reads a refdb into an assoc array of assoc arrays
;;   returns (list dat msg)
(define (read-refdb refdb-path)
  (let ((sheets-file  (conc refdb-path "/sheet-names.cfg")))
    (if (not (safe-file-exists? sheets-file))
	(list #f (conc "ERROR: no refdb found at " refdb-path))
	(if (not (file-read-access? sheets-file))
	(if (not (file-readable? sheets-file))
	    (list #f (conc "ERROR: refdb file not readable at " refdb-path))
	    (let* ((sheets (with-input-from-file sheets-file
			     (lambda ()
			       (let loop ((inl (read-line))
					  (res '()))
				 (if (eof-object? inl)
				     (reverse res)

(declare (unit odsmod))
(declare (uses commonmod))

(module odsmod
	*
	
(import scheme chicken data-structures extras csv-xml regex)
(import scheme (chicken base) (chicken string) (chicken port) (chicken io) (chicken file) csv-xml regex)
(import (prefix sqlite3 sqlite3:) posix typed-records srfi-18 srfi-69
	format ports srfi-1 matchable srfi-13)
(import commonmod)
;; (use (prefix ulex ulex:))

(define ods:dirs
  '("Configurations2"

((license "BSD")
 (category os)
 (author "The CHICKEN team")
 (components (extension pathname-expand)))

;; -*-scheme-*-
((synopsis "Pathname expansion")
 (license "BSD")
 (category os)
 (doc-from-wiki)
 ;; No tests; this is very hard to do in a cross-platform way without
 ;; writing a reimplementation of the functionality in our tests...
 (author "The CHICKEN team"))

;;; Pathname expansion, to replace the deprecated core functionality.
;
; Copyright (c) 2014, The CHICKEN Team
; All rights reserved.
;
; Redistribution and use in source and binary forms, with or without
; modification, are permitted provided that the following conditions
; are met:
;
;   Redistributions of source code must retain the above copyright
;   notice, this list of conditions and the following disclaimer.
;
;   Redistributions in binary form must reproduce the above copyright
;   notice, this list of conditions and the following disclaimer in
;   the documentation and/or other materials provided with the
;   distribution.
;
;   Neither the name of the author nor the names of its contributors
;   may be used to endorse or promote products derived from this
;   software without specific prior written permission.
;
; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
; FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
; COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
; INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
; (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
; SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
; HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
; STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
; ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
; OF THE POSSIBILITY OF SUCH DAMAGE.

(module pathname-expand
    (pathname-expand)

(import (chicken base) (chicken pathname) (chicken condition) (chicken platform) scheme)
(import (chicken fixnum) (chicken process-context) (chicken process-context posix))
(import srfi-13 (chicken file) )

;; Expand pathname starting with "~", and/or apply base directory to
;; relative pathname
;
; Inspired by Gambit's "path-expand" procedure.

(define pathname-expand
  (let* ((home
          ;; Effective uid might be changed at runtime so this has to
          ;; be a lambda, but we could try to cache the result on uid.
          (lambda ()
            (cond-expand
              ((and windows (not cygwin))
               (or (get-environment-variable "USERPROFILE")
                   (get-environment-variable "HOME")
                   "."))
              (else
               (let ((info (user-information (current-effective-user-id))))
                 (list-ref info 5))))))
         (slash
          (cond-expand
            ((and windows (not cygwin)) '(#\\ #\/))
            (else '(#\/))))
         (ts (string-append "~" (string (car slash))))
         (tts (string-append "~" ts)))
    (lambda (path #!optional (base (current-directory)))
      (if (absolute-pathname? path)
          path
          (let ((len (string-length path)))
            (cond
             ((or (string=? "~~" path)
                  (and (fx>= len 3) (string=? tts (substring path 0 3))))
              ;; Repository-path
              (let ((rp (repository-path)))
                (if rp
                    (string-append rp (substring path 2 len))
                    (signal
                     (make-composite-condition
                      (make-property-condition
                       'exn 'location 'pathname-expand
                       'message "No repository path defined"
                       'arguments (list path))
                      (make-property-condition 'pathname-expand)
                      (make-property-condition 'repository-path))))))
             ((or (string=? "~" path)
                  (and (fx> len 2) (string=? ts (substring path 0 2))))
              ;; Current user's home dir
              (string-append (home) (substring path 1 len)))
             ((and (fx> len 0) (char=? #\~ (string-ref path 0)))
              ;; Arbitrary user's home dir
              (let ((rest (substring path 1 len)))
                (if (and (fx> len 1) (memq (string-ref path 1) slash))
                    (string-append (home) rest)
                    (let* ((p (string-index path (lambda (c) (memq c slash))))
                           (user (substring path 1 (or p len)))
                           (info (user-information user)))
                      (if info
                          (let ((dir (list-ref info 5)))
                            (if p
                                (make-pathname dir (substring path p))
                                dir))
                          (signal
                           (make-composite-condition
                            (make-property-condition
                             'exn 'location 'pathname-expand
                             'message "Cannot expand homedir for user"
                             'arguments (list path))
                            (make-property-condition 'pathname-expand)
                            (make-property-condition 'username))))))))
             (else (make-pathname base path))))))))

)

;; -*-scheme-*-
(standard-extension 'pathname-expand 0.1)

pktdb-pktspec

;; utility procs
increment-string ;; used to get indexes for strings in ref pkts
make-report      ;; make a .dot file 
)

(import (chicken base) scheme (chicken process) (chicken time posix) (chicken io) (chicken file))
(import chicken scheme data-structures posix srfi-1 regex srfi-13 srfi-69 ports extras)
(use crypt sha1 message-digest (prefix dbi dbi:) typed-records)
(import chicken.process-context.posix (chicken string) (chicken time) (chicken sort) (chicken file posix) (chicken condition) srfi-1 regex srfi-13 srfi-69 (chicken port) )
(import crypt sha1 message-digest (prefix dbi dbi:) typed-records)

;;======================================================================
;; DATA MANIPULATION UTILS
;;======================================================================

(define-inline (unescape-data data)
  (string-translate* data '(("\\n" . "\n") ("\\\\" . "\\"))))

     (for-each
      (lambda (pktsdir) ;; look at all
	(cond
	 ((not (file-exists? pktsdir))
	  (print "ERROR: packets directory " pktsdir " does not exist."))
	 ((not (directory? pktsdir))
	  (print "ERROR: packets directory path " pktsdir " is not a directory."))
	 ((not (file-read-access? pktsdir))
	 ((not (file-readable? pktsdir))
	  (print "ERROR: packets directory path " pktsdir " is not readable."))
	 (else
	  ;; (print "INFO: Loading packets found in " pktsdir)
	  (let ((pkts (glob (conc pktsdir "/*.pkt"))))
	    (for-each
	     (lambda (pkt)
	       (let* ((uuid    (cadr (string-match ".*/([0-9a-f]+).pkt" pkt)))

;;======================================================================

(declare (unit processmod))

(module processmod
	*
	
(import scheme chicken data-structures extras)
(import (prefix sqlite3 sqlite3:) posix typed-records srfi-18 srfi-69
	format ports srfi-1 matchable regex directory-utils)
(import scheme (chicken base) )
(import (prefix sqlite3 sqlite3:) typed-records srfi-18 srfi-69
	format (chicken port) srfi-1 matchable regex directory-utils)

;;======================================================================
;; supporting functions
;;======================================================================

)

(import (prefix ulex ulex:))

(import commonmod)
(import itemsmod)
(import apimod)
(import dbmod)

;; (include "rmt-inc.scm")

;;
;; THESE ARE ALL CALLED ON THE CLIENT SIDE!!!
;;

;; generate entries for ~/.megatestrc with the following
;;
;;  grep define ../rmt.scm | grep rmt: |perl -pi -e 's/\(define\s+\((\S+)\W.*$/\1/'|sort -u

			#f)))
	  (if cinfo
	      cinfo
	      (if (server:check-if-running areapath)
		  (client:setup areapath)
		  #f))))

;; return the handle struct for sending queries to a specific database
;;  - initializes the connection object if this is the first access
;;    - finds the "captain" and asks who to talk to for the given dbfname
;;    - establishes the connection to the current dbowner
;;
(define (rmt:connect alldat dbfname dbtype)
  (let* ((ulexdat    (or (alldat-ulexdat alldat)
			 (rmt:setup-ulex alldat))))
    (ulex:connect ulexdat dbfname dbtype)))
(define *send-receive-mutex* (make-mutex)) ;; should have separate mutex per run-id

;; setup the remote calls
(define (rmt:setup-ulex alldat)
  (let* ((new-ulexdat (ulex:setup))) ;; establish connection to ulex
    (alldat-ulexdat-set! alldat new-ulexdat)
    (let ((udata (alldat-ulexdat alldat)))
      ;; register all needed procs
      (ulex:register-handler udata 'ping common:get-full-version)
      (ulex:register-handler udata 'login common:get-full-version) ;; force setup of the connection
      new-ulexdat)))

;; set up a connection to the current owner of the dbfile associated with rid
;; then send the query to that dbfile owner and wait for a response.
;;
(define (rmt:send-receive cmd rid params #!key (attemptnum 1)(area-dat #f)) ;; start attemptnum at 1 so the modulo below works as expected
  (let* ((alldat   *alldat*)
	 (areapath (alldat-areapath alldat))
	 (dbtype   (if (or (not rid)(< rid 1)) ;; this is the criteria for "main.db"
		       'main 'runs))
	 (dbfname  (if (eq? dbtype 'main)
		       "main.db"
		       (conc rid ".db")))
	 (dbfile   (conc areapath "/.db/" dbfname))
	 (ulexconn (rmt:connect alldat dbfname dbtype)))  
  (rmt:open-qry-close-locally cmd 0 params))
    (rmt:open-qry-close-locally cmd 0 params)))

;;   
;; ;; #;(common:telemetry-log (conc "rmt:"(->string cmd))
;; ;; #;(define (rmt:send-receive cmd rid params #!key (attemptnum 1)(area-dat #f)) ;; start attemptnum at 1 so the modulo below works as expected
;; ;; 
;; ;; #;(common:telemetry-log (conc "rmt:"(->string cmd))
;; ;; payload: `((rid . ,rid)
;; ;; (params . ,params)))

(declare (unit runconfigmod))
(declare (uses commonmod))

(module runconfigmod
	*
	
(import scheme chicken data-structures extras)
(import (prefix sqlite3 sqlite3:) posix typed-records srfi-18 srfi-69 format ports srfi-1 matchable)
(import scheme (chicken base) )
(import (prefix sqlite3 sqlite3:) typed-records srfi-18 srfi-69 format (chicken port) srfi-1 matchable)
(import commonmod)
;; (use (prefix ulex ulex:))

(include "common_records.scm")


)

;;   <http://www.netscape.com/newsref/std/cookie_spec.html>

;; (declare (unit cookie))

(module cookie
    *

(import chicken scheme data-structures extras srfi-13 ports posix)
(import (chicken base) scheme queues srfi-13 (chicken port) (chicken io)(chicken file) (chicken format) (chicken string) (chicken time posix))
  
(require-extension srfi-1 srfi-13 srfi-14 regex)
;; (use  srfi-1 srfi-13 srfi-14 regex)
;; (declare (export parse-cookie-string construct-cookie-string))

;; #>
;; #include <time.h>

;; stml is a list of html strings

;; (declare (unit stml))

(module stml2
    *

(import chicken scheme data-structures extras srfi-13 ports posix srfi-69 files srfi-1) 
(import (chicken base) scheme queues srfi-13 (chicken port) (chicken io) (chicken file) srfi-69 srfi-1 (chicken condition)) 

(import cookie)
(use (prefix dbi dbi:) (prefix crypt c:) typed-records)
(import (prefix dbi dbi:) (prefix crypt c:) typed-records)

;; (declare (uses misc-stml))
(use regex)

;; The (usually global) sdat contains everything about the session
;;
(defstruct sdat

(declare (uses commonmod))
(declare (uses mtconfigf))

(module subrunmod
	*
	
(import scheme chicken data-structures extras)
(use (prefix sqlite3 sqlite3:) posix typed-records srfi-18
	srfi-69 format ports srfi-1 matchable irregex
(import scheme (chicken base))
(use (prefix sqlite3 sqlite3:) typed-records srfi-18
	srfi-69 format (chicken port) srfi-1 matchable irregex
	call-with-environment-variables)

(import commonmod)
(import  (prefix mtconfigf configf:))

;; (use (prefix ulex ulex:))

(declare (unit rmtmod))
(declare (uses commonmod))

(module rmtmod
	*
	
(import scheme chicken data-structures extras)
(import (prefix sqlite3 sqlite3:) posix typed-records srfi-18 srfi-69 format ports srfi-1 matchable)
(import scheme (chicken base))
(import (prefix sqlite3 sqlite3:) typed-records srfi-18 srfi-69 format (chicken port) srfi-1 matchable)
(import commonmod)
;; (use (prefix ulex ulex:))

(include "common_records.scm")


)

;;======================================================================

(declare (unit treemod))

(module treemod
	*
	
(import scheme chicken data-structures extras)
(import scheme (chicken base))
(import (prefix iup iup:)) ;; (prefix sqlite3 sqlite3:) posix typed-records srfi-18 srfi-69 format ports srfi-1 matchable)
;; (import commonmod) ;;; DO NOT ALLOW rmt*scm TO DEPEND ON common*scm!!!!
;; (include "common_records.scm")

)

;;   See README in the distribution at https://www.kiatoa.com/fossils/ulex
;; NOTES:
;;   Why sql-de-lite and not say, dbi?  - performance mostly, then simplicity.
;;
;;======================================================================

;; (use rpc pkts mailbox sqlite3)
  

(module ulex
    *
     ;;    #;(
     ;;     ;; areas
     ;;     make-area
     ;;     area->alist
     ;;     ;; server
     ;;     launch
     ;;     update-known-servers
     ;;     shutdown
     ;;     get-best-server
     ;;     ;; client side
     ;;     call
     ;;     ;; queries, procs and system commands (i.e. workers)
     ;;     register
     ;;     register-batch
     ;;     ;; database - note: most database stuff need not be exposed, these calls may be removed from exports in future
     ;;     open-db
     ;;     ;; ports
     ;;     pl-find-port
     ;;     pl-get-prev-used-port
     ;;     pl-open-db
     ;;     pl-open-run-close
     ;;     pl-release-port
     ;;     pl-set-port
     ;;     pl-take-port
     ;;     pl-is-port-available
     ;;     pl-get-port-state
     ;;     ;; system
     ;;     get-normalized-cpu-load
	 
     ;; )

(import scheme posix chicken data-structures ports extras files mailbox)
(import rpc srfi-18 pkts matchable regex
	typed-records srfi-69 srfi-1
	srfi-4 regex-case
	(prefix sqlite3 sqlite3:)
	foreign
	tcp) ;; ulex-netutil)

;;======================================================================
;; D E B U G   H E L P E R S
;;======================================================================
    
(define (dbg> . args)
  (with-output-to-port (current-error-port)
    (lambda ()
      (apply print "dbg> " args))))

(define (debug-pp . args)
  (if (get-environment-variable "ULEX_DEBUG")
      (with-output-to-port (current-error-port)
	(lambda ()
	  (apply pp args)))))

(define *default-debug-port* (current-error-port))

(define (sdbg> fn stage-name stage-start stage-end start-time . message)
  (if (get-environment-variable "ULEX_DEBUG")
      (with-output-to-port *default-debug-port* 
	(lambda ()
	  (apply print "ulex:" fn " " stage-name " took " (- (if stage-end stage-end (current-milliseconds)) stage-start) " ms. "
		 (if start-time
		     (conc "total time " (- (current-milliseconds) start-time)
			   " ms.")
		     "")
		 message
		 )))))

;;======================================================================
;; M A C R O S
;;======================================================================
;; iup callbacks are not dumping the stack, this is a work-around
;;

;; Some of these routines use:
;;
;;     http://www.cs.toronto.edu/~gfb/scheme/simple-macros.html
;;
;; Syntax for defining macros in a simple style similar to function definiton,
;;  when there is a single pattern for the argument list and there are no keywords.
;;
;; (define-simple-syntax (name arg ...) body ...)
;;

(define-syntax define-simple-syntax
  (syntax-rules ()
    ((_ (name arg ...) body ...)
     (define-syntax name (syntax-rules () ((name arg ...) (begin body ...)))))))

(define-simple-syntax (catch-and-dump proc procname)
  (handle-exceptions
   exn
   (begin
     (print-call-chain (current-error-port))
     (with-output-to-port (current-error-port)
       (lambda ()
         (print ((condition-property-accessor 'exn 'message) exn))
         (print "Callback error in " procname)
         (print "Full condition info:\n" (condition->list exn)))))
   (proc)))


;;======================================================================
;;  R E C O R D S
;;======================================================================

;; information about me as a server
;;
(defstruct area
  ;; about this area
  (useportlogger #f)
  (lowport       32768)
  (server-type   'auto)  ;; auto=create up to five servers/pkts, main=create pkts, passive=no pkt (unless there are no pkts at all)
  (conn          #f)
  (port          #f)
  (myaddr        (get-my-best-address))
  pktid          ;; get pkt from hosts table if needed
  pktfile
  pktsdir
  dbdir
  (dbhandles     (make-hash-table)) ;; fname => list-of-dbh, NOTE: Should really never need more than one?
  (mutex         (make-mutex))
  (rtable        (make-hash-table)) ;; registration table of available actions
  (dbs           (make-hash-table)) ;; filename => random number, used for choosing what dbs I serve
  ;; about other servers
  (hosts         (make-hash-table)) ;; key => hostdat
  (hoststats     (make-hash-table)) ;; key => alist of fname => ( qcount . qtime )
  (reqs          (make-hash-table)) ;; uri => queue
  ;; work queues
  (wqueues       (make-hash-table)) ;; fname => qdat
  (stats         (make-hash-table)) ;; fname => totalqueries
  (last-srvup    (current-seconds)) ;; last time we updated the known servers
  (cookie2mbox   (make-hash-table)) ;; map cookie for outstanding request to mailbox of awaiting call
  (ready #f)
  (health        (make-hash-table)) ;; ipaddr:port => num failed pings since last good ping
  )

;; host stats
;;
(defstruct hostdat
  (pkt      #f)
  (dbload   (make-hash-table))  ;; "dbfile.db" => queries/min
  (hostload #f)                 ;; normalized load ( 5min load / numcpus )
  )

;; dbdat
;;
(defstruct dbdat
  (dbh    #f)
  (fname  #f)
  (write-access #f)
  (sths   (make-hash-table))  ;; hash mapping query strings to handles
  )

;; qdat
;;
(defstruct qdat
  (writeq  (make-queue))
  (readq   (make-queue))
  (rwq     (make-queue))
  (logq    (make-queue)) ;; do we need a queue for logging? yes, if we use sqlite3 db for logging
  (osshort (make-queue))
  (oslong  (make-queue))
  (misc    (make-queue)) ;; used for things like ping-full
  )

;; calldat
;;
(defstruct calldat
  (ctype 'dbwrite)
  (obj   #f)              ;; this would normally be an SQL statement e.g. SELECT, INSERT etc.
  (rtime (current-milliseconds)))

;; make it a global? Well, it is local to area module

(import scheme posix-groups (chicken base) queues (chicken port) (chicken io) (chicken file) mailbox system-information)
(define *pktspec*
  `((server (hostname . h)
	    (port     . p)
	    (pid      . i)
	    (ipaddr   . a)
	    )
    (data   (hostname . h)  ;; sender hostname
	    (port     . p)  ;; sender port
	    (ipaddr   . a)  ;; sender ip
	    (hostkey  . k)  ;; sending host key - store info at server under this key
	    (servkey  . s)  ;; server key - this needs to match at server end or reject the msg
	    (format   . f)  ;; sb=serialized-base64, t=text, sx=sexpr, j=json
	    (data     . d)  ;; base64 encoded slln data
	    )))

(import srfi-18 pkts matchable regex
;; work item
;;
(defstruct witem
  (rhost #f)   ;; return host
  (ripaddr #f) ;; return ipaddr
  (rport #f)   ;; return port
  (servkey #f) ;; the packet representing the client of this workitem, used by final send-message
  (rdat  #f)   ;; the request - usually an sql query, type is rdat
  (action #f)  ;; the action: immediate, dbwrite, dbread,oslong, osshort
  (cookie #f)  ;; cookie id for response
  (data   #f)  ;; the data payload, i.e. parameters
  (result #f)  ;; the result from processing the data
  (caller #f)) ;; the calling peer according to rpc itself

	typed-records srfi-69 srfi-1
(define (trim-pktid pktid)
  (if (string? pktid)
      (substring pktid 0 4)
      "nopkt"))

	srfi-4 regex-case
(define (any->number num)
  (cond
   ((number? num) num)
   ((string? num) (string->number num))
   (else num)))

(use trace)
(trace-call-sites #t)

;;======================================================================
;; D A T A B A S E   H A N D L I N G 
;;======================================================================

;; look in dbhandles for a db, return it, else return #f
;;
(define (get-dbh acfg fname)
  (let ((dbh-lst (hash-table-ref/default (area-dbhandles acfg) fname '())))
    (if (null? dbh-lst)
	(begin
	  ;; (print "opening db for " fname)
	  (open-db acfg fname)) ;; Note that the handles get put back in the queue in the save-dbh calls
	(let ((rem-lst (cdr dbh-lst)))
	  ;; (print "re-using saved connection for " fname)
	  (hash-table-set! (area-dbhandles acfg) fname rem-lst)
	  (car dbh-lst)))))

(define (save-dbh acfg fname dbdat)
    ;; (print "saving dbh for " fname)
    (hash-table-set! (area-dbhandles acfg) fname (cons dbdat (hash-table-ref/default (area-dbhandles acfg) fname '()))))

;; open the database, if never before opened init it. put the handle in the
;; open db's hash table
;; returns: the dbdat
;;
(define (open-db acfg fname)
  (let* ((fullname     (conc (area-dbdir acfg) "/" fname))
	 (exists       (file-exists? fullname))
	 (write-access (if exists
			   (file-write-access? fullname)
			   (file-write-access? (area-dbdir acfg))))
	 (db           (sqlite3:open-database fullname))
	 (handler      (sqlite3:make-busy-timeout 136000))
	 )
    (sqlite3:set-busy-handler! db handler)
    (sqlite3:execute db "PRAGMA synchronous = 0;")
    (if (not exists) ;; need to init the db
	(if write-access
	    (let ((isql (get-rsql acfg 'dbinitsql))) ;; get the init sql statements
	      ;; (sqlite3:with-transaction
	(prefix sqlite3 sqlite3:)
	      ;;  db
	      ;;  (lambda ()
		 (if isql
		     (for-each
	(chicken foreign)
		      (lambda (sql)
			(sqlite3:execute db sql))
    (chicken sort)
		      isql)))
	    (print "ERROR: no write access to " (area-dbdir acfg))))
    (make-dbdat dbh: db fname: fname write-access: write-access)))

    (chicken process-context posix)
;; This is a low-level command to retrieve or to prepare, save and return a prepared statment
;; you must extract the db handle
;;
(define (get-sth db cache stmt)
  (if (hash-table-exists? cache stmt)
      (begin
	;; (print "Reusing cached stmt for " stmt)
	(hash-table-ref/default cache stmt #f))
      (let ((sth (sqlite3:prepare db stmt)))
	(hash-table-set! cache stmt sth)
	;; (print "prepared stmt for " stmt)
	sth)))

    (chicken process-context)
;; a little more expensive but does all the tedious deferencing - only use if you don't already
;; have dbdat and db sitting around
;;
(define (full-get-sth acfg fname stmt)
  (let* ((dbdat  (get-dbh acfg fname))
	 (db     (dbdat-dbh dbdat))
	 (sths   (dbdat-sths dbdat)))
    (get-sth db sths stmt)))

	tcp6
;; write to a db
;; acfg: area data
;; rdat: request data
;; hdat: (host . port)
;;
;; (define (dbwrite acfg rdat hdat data-in)
;;   (let* ((dbname (car data-in))
;; 	 (dbdat  (get-dbh acfg dbname))
;; 	 (db     (dbdat-dbh dbdat))
;; 	 (sths   (dbdat-sths dbdat))
;; 	 (stmt   (calldat-obj rdat))
;; 	 (sth    (get-sth db sths stmt))
;; 	 (data   (cdr data-in)))
;;     (print "dbname: " dbname " acfg: " acfg " rdat: " (calldat->alist rdat) " hdat: " hdat " data: " data)
;;     (print "dbdat: " (dbdat->alist dbdat))
;;     (apply sqlite3:execute sth data)
;;     (save-dbh acfg dbname dbdat)
;;     #t
	;; ulex-netutil
;;     ))

	hostinfo
(define (finalize-all-db-handles acfg)
  (let* ((dbhandles (area-dbhandles acfg))  ;; dbhandles is hash of fname ==> dbdat
	 (num       0))
    (for-each
    (chicken file posix)
     (lambda (area-name)
       (print "Closing handles for " area-name)
       (let ((dbdats (hash-table-ref/default dbhandles area-name '())))
	 (for-each
    (chicken random)
	  (lambda (dbdat)
	    ;; first close all statement handles
	    (for-each
    (chicken pretty-print)
	     (lambda (sth)
	       (sqlite3:finalize! sth)
    (chicken string)
	       (set! num (+ num 1)))
	     (hash-table-values (dbdat-sths dbdat)))
	    ;; now close the dbh
	    (set! num (+ num 1))
	    (sqlite3:finalize! (dbdat-dbh dbdat)))
	  dbdats)))
     (hash-table-keys dbhandles))
    (print "FINALIZED " num " dbhandles")))

    (chicken time)
;;======================================================================
;; W O R K   Q U E U E   H A N D L I N G 
;;======================================================================

    (chicken condition)
(define (register-db-as-mine acfg dbname)
  (let ((ht (area-dbs acfg)))
    (if (not (hash-table-ref/default ht dbname #f))
	(hash-table-set! ht dbname (random 10000)))))
	
	(chicken tcp)) ;; ulex-netutil)
(define (work-queue-add acfg fname witem)
  (let* ((work-queue-start (current-milliseconds))
	 (action           (witem-action witem)) ;; NB the action is the index into the rdat actions
	 (qdat             (or (hash-table-ref/default (area-wqueues acfg) fname #f)
			       (let ((newqdat (make-qdat)))
				 (hash-table-set! (area-wqueues acfg) fname newqdat)
				 newqdat)))
	 (rdat             (hash-table-ref/default (area-rtable acfg) action #f)))
    (if rdat
	(queue-add!
	 (case (calldat-ctype rdat)
	   ((dbwrite)   (register-db-as-mine acfg fname)(qdat-writeq qdat))
	   ((dbread)    (register-db-as-mine acfg fname)(qdat-readq  qdat))
	   ((dbrw)      (register-db-as-mine acfg fname)(qdat-rwq    qdat))
	   ((oslong)    (qdat-oslong qdat))
	   ((osshort)   (qdat-osshort qdat))
	   ((full-ping) (qdat-misc  qdat))
	   (else
	    (print "ERROR: no queue for " action ". Adding to dbwrite queue.")
	    (qdat-writeq qdat)))
	 witem)
	(case action
	  ((full-ping)(qdat-misc qdat))
	  (else
	   (print "ERROR: No action " action " was registered"))))
    (sdbg> "work-queue-add" "queue-add" work-queue-start #f #f)
    #t)) ;; for now, simply return #t to indicate request got to the queue

(define (doqueue acfg q fname dbdat dbh)
  ;; (print "doqueue: " fname)
  (let* ((start-time (current-milliseconds))
	 (qlen       (queue-length q)))
    (if (> qlen 1)
	(print "Processing queue of length " qlen))
    (let loop ((count      0)
	       (responses '()))
      (let ((delta (- (current-milliseconds) start-time)))
	(if (or (queue-empty? q)
		(> delta 400)) ;; stop working on this queue after 400ms have passed
	    (list count delta responses) ;; return count, delta and responses list
	    (let* ((witem  (queue-remove! q))
		   (action (witem-action witem))
		   (rdat   (witem-rdat   witem))
		   (stmt   (calldat-obj rdat))
		   (sth    (full-get-sth acfg fname stmt))
		   (ctype  (calldat-ctype rdat))
		   (data   (witem-data   witem))
		   (cookie (witem-cookie witem)))
	      ;; do the processing and save the result in witem-result
	      (witem-result-set!
	       witem
	       (case ctype ;; action
		 ((noblockwrite) ;; blind write, no ack of success returned
		  (apply sqlite3:execute sth data)
		  (sqlite3:last-insert-rowid dbh))
		 ((dbwrite)      ;; blocking write   
		  (apply sqlite3:execute sth data)
		  #t)
		 ((dbread) ;; TODO: consider breaking this up and shipping in pieces for large query
		  (apply sqlite3:map-row (lambda x x) sth data))
		 ((full-ping)  'full-ping)
		 (else (print "Not ready for action " action) #f)))
	      (loop (add1 count)
		    (if cookie
			(cons witem responses)
			responses))))))))

;; do up to 400ms of processing on each queue
;; - the work-queue-processor will allow the max 1200ms of work to complete but it will flag as overloaded
;; 
(define (process-db-queries acfg fname)
  (if (hash-table-exists? (area-wqueues acfg) fname)
      (let* ((process-db-queries-start-time (current-milliseconds))
	     (qdat             (hash-table-ref/default (area-wqueues acfg) fname #f))
	     (queue-sym->queue (lambda (queue-sym)
				 (case queue-sym  ;; lookup the queue from qdat given a name (symbol)
				   ((wqueue)  (qdat-writeq qdat))
				   ((rqueue)  (qdat-readq  qdat))
				   ((rwqueue) (qdat-rwq    qdat))
				   ((misc)    (qdat-misc   qdat))
				   (else #f))))
	     (dbdat   (get-dbh acfg fname))
	     (dbh     (if (dbdat? dbdat)(dbdat-dbh dbdat) #f))
	     (nowtime (current-seconds)))
	;; handle the queues that require a transaction
	;;
	(map ;; 
	 (lambda (queue-sym)
	   ;; (print "processing queue " queue-sym)
	   (let* ((queue (queue-sym->queue queue-sym)))
	     (if (not (queue-empty? queue))
		 (let ((responses
			(sqlite3:with-transaction ;; todo - catch exceptions...
			 dbh
			 (lambda ()
			   (let* ((res (doqueue acfg queue fname dbdat dbh))) ;; this does the work!
			     ;; (print "res=" res)
			     (match res
			      ((count delta responses)
			       (update-stats acfg fname queue-sym delta count)
			       (sdbg> "process-db-queries" "sqlite3-transaction" process-db-queries-start-time #f #f)
			       responses) ;; return responses
			      (else
			       (print "ERROR: bad return data from doqueue " res)))
			     )))))
		   ;; having completed the transaction, send the responses.
		   ;; (print "INFO: sending " (length responses) " responses.")
		   (let loop ((responses-left responses))
		     (cond
		      ((null? responses-left)  #t)
		      (else
		       (let* ((witem    (car responses-left))
			      (response (cdr responses-left)))  
			 (call-deliver-response acfg (witem-ripaddr witem)(witem-rport witem)
						(witem-cookie witem)(witem-result witem)))
		       (loop (cdr responses-left))))))
		 )))
	 '(wqueue rwqueue rqueue))
	
	;; handle misc queue
	;;
	;; (print "processing misc queue")
	(let ((queue (queue-sym->queue 'misc)))
	  (doqueue acfg queue fname dbdat dbh))
	;; ....
	(save-dbh acfg fname dbdat)
	#t ;; just to let the tests know we got here
	)
      #f ;; nothing processed
      ))

;; run all queues in parallel per db but sequentially per queue for that db.
;;  - process the queues every 500 or so ms
;;  - allow for long running queries to continue but all other activities for that
;;    db will be blocked.
;;
(define (work-queue-processor acfg)
  (let* ((threads (make-hash-table))) ;; fname => thread
    (let loop ((fnames      (hash-table-keys (area-wqueues acfg)))
	       (target-time (+ (current-milliseconds) 50)))
      ;;(if (not (null? fnames))(print "Processing for these databases: " fnames))
      (for-each
       (lambda (fname)
	 ;; (print "processing for " fname)
	 ;;(process-db-queries acfg fname))
	 (let ((th (hash-table-ref/default threads fname #f)))
	   (if (and th (not (member (thread-state th) '(dead terminated))))
	       (begin
		 (print "WARNING: worker thread for " fname " is taking a long time.")
		 (print "Thread is in state " (thread-state th)))
	       (let ((th1 (make-thread (lambda ()
					 ;; (catch-and-dump
					 ;;  (lambda ()
					    ;; (print "Process queries for " fname)
					    (let ((start-time (current-milliseconds)))
					      (process-db-queries acfg fname)
					      ;; (thread-sleep! 0.01) ;; need the thread to take at least some time
					      (hash-table-delete! threads fname)) ;; no mutexes?
					    fname)
					  "th1"))) ;; ))
		 (hash-table-set! threads fname th1)
		 (thread-start! th1)))))
       fnames)
      ;; (thread-sleep! 0.1) ;; give the threads some time to process requests
      ;; burn time until 400ms is up
      (let ((now-time (current-milliseconds)))
	(if (< now-time target-time)
	    (let ((delta (- target-time now-time)))
	      (thread-sleep! (/ delta 1000)))))
      (loop (hash-table-keys (area-wqueues acfg))
	    (+ (current-milliseconds) 50)))))

;;======================================================================
;; S T A T S   G A T H E R I N G
;; KEY FUNCTIONS - THESE ARE TOO BE EXPOSED AND USED
;;======================================================================

;; connection setup and management functions
(defstruct stat
  (qcount-avg  0)                  ;; coarse running average
  (qtime-avg   0)                  ;; coarse running average
  (qcount      0)                  ;; total
  (qtime       0)                  ;; total
  (last-qcount 0)                  ;; last 
  (last-qtime  0)                  ;; last
  (dbs        '())                 ;; list of db files handled by this node
  (when        0))                 ;; when the last query happened - seconds


;; This is the basic setup command. Must always be
(define (update-stats acfg fname bucket duration numqueries)
  (let* ((key   fname) ;; for now do not use bucket. Was: (conc fname "-" bucket)) ;; lazy but good enough
	 (stats (or (hash-table-ref/default (area-stats acfg) key #f)
		    (let ((newstats (make-stat)))
		      (hash-table-set! (area-stats acfg) key newstats)
		      newstats))))
    ;; when the last query happended (used to remove the fname from the active list)
    (stat-when-set! stats (current-seconds))
    ;; last values
    (stat-last-qcount-set! stats numqueries)
    (stat-last-qtime-set!  stats duration)
    ;; total over process lifetime
    (stat-qcount-set! stats (+ (stat-qcount stats) numqueries))
    (stat-qtime-set!  stats (+ (stat-qtime  stats) duration))
    ;; coarse average
    (stat-qcount-avg-set! stats (/ (+ (stat-qcount-avg stats) numqueries) 2))
    (stat-qtime-avg-set!  stats (/ (+ (stat-qtime-avg  stats) duration)   2))

;; called before connecting to a db using connect.
    ;; here is where we add the stats for a given dbfile
    (if (not (member fname (stat-dbs stats)))
	(stat-dbs-set! stats (cons fname (stat-dbs stats))))

    ))

;;======================================================================
;; S E R V E R   S T U F F 
;;======================================================================

;; this does NOT return!
;;
(define (find-free-port-and-open acfg)
  (let ((port (or (area-port acfg) 3200)))
    (handle-exceptions
	exn
	(begin
	  (print "INFO: cannot bind to port " (rpc:default-server-port) ", trying next port")
	  (area-port-set! acfg (+ port 1))
	  (find-free-port-and-open acfg))
      (rpc:default-server-port port)
      (area-port-set! acfg port)
      (tcp-read-timeout 120000)
      ;; ((rpc:make-server (tcp-listen port)) #t)
      (tcp-listen (rpc:default-server-port)
      ))))

;; find or become the captain
;; register this node by putting a packet into the pkts dir.
;; look for other servers
;; contact other servers and compile list of servers
;; there are two types of server
;;     main servers - dashboards, runners and dedicated servers - need pkt
;;     passive servers - test executers, step calls, list-runs - no pkt
;;
(define (register-node acfg hostip port-num)
  ;;(mutex-lock! (area-mutex acfg))
  (let* ((server-type  (area-server-type acfg)) ;; auto, main, passive (no pkt created)
	 (best-ip      (or hostip (get-my-best-address)))
	 (mtdir        (area-dbdir acfg))
	 (pktdir       (area-pktsdir acfg))) ;; conc mtdir "/.server-pkts")))
    (print "Registering node " best-ip ":" port-num)
    (if (not mtdir) ;; require a home for this node to put or find databases
	#f
	(begin
	  (if  (not (directory? pktdir))(create-directory pktdir))
	  ;; server is started, now create pkt if needed
	  (print "Starting server in " server-type " mode with port " port-num)
	  (if (member server-type '(auto main)) ;; TODO: if auto, count number of servers registers, if > 3 then don't put out a pkt
	      (begin
		(area-pktid-set! acfg
				 (write-alist->pkt
				  pktdir 
				  `((hostname . ,(get-host-name))
				    (ipaddr   . ,best-ip)
				    (port     . ,port-num)
				    (pid      . ,(current-process-id)))
				  pktspec: *pktspec*
				  ptype:   'server))
		(area-pktfile-set! acfg (conc pktdir "/" (area-pktid acfg) ".pkt"))))
	  (area-port-set!    acfg port-num)
	  #;(mutex-unlock! (area-mutex acfg))))))

;; setup and return a ulex object
(define *cookie-seqnum* 0)
(define (make-cookie key)
  (set! *cookie-seqnum* (add1 *cookie-seqnum*))
  ;;(print "MAKE COOKIE CALLED -- on "servkey"-"*cookie-seqnum*)
  (conc key "-" *cookie-seqnum*)
  )

;; dispatch locally if possible
;;
(define (call-deliver-response acfg ipaddr port cookie data)
  (if (and (equal? (area-myaddr acfg) ipaddr)
	   (equal? (area-port     acfg) port))
      (deliver-response acfg cookie data)
      ((rpc:procedure 'response ipaddr port) cookie data)))

(define (deliver-response acfg cookie data)
  (let ((deliver-response-start (current-milliseconds)))
    (thread-start! (make-thread
		    (lambda ()
		      (let loop ((tries-left 5))
			;;(print "TOP OF DELIVER_RESPONSE LOOP; triesleft="tries-left)
			;;(pp (hash-table->alist (area-cookie2mbox acfg)))
			(let* ((mbox (hash-table-ref/default (area-cookie2mbox acfg) cookie #f)))
			  (cond
			   ((eq? 0 tries-left)
			    (print "ulex:deliver-response: I give up. Mailbox never appeared. cookie="cookie)
			    )
			   (mbox
			    ;;(print "got mbox="mbox"  got data="data"  send.")
			    (mailbox-send! mbox data))
			   (else
			    ;;(print "no mbox yet.  look for "cookie)
			    (thread-sleep! (/ (- 6 tries-left) 10))
			    (loop (sub1 tries-left))))))
		      ;; (debug-pp (list (conc "ulex:deliver-response took " (- (current-milliseconds) deliver-response-start) " ms, cookie=" cookie " data=") data))
		      (sdbg> "deliver-response" "mailbox-send" deliver-response-start #f #f cookie)
		      )
		    (conc "deliver-response thread for cookie="cookie))))
  #t)

;; action:
;;   immediate - quick actions, no need to put in queues
;;   dbwrite   - put in dbwrite queue
;;   dbread    - put in dbread queue
;;   oslong    - os actions, e.g. du, that could take a long time
;;   osshort   - os actions that should be quick, e.g. df
;;
(define (request acfg from-ipaddr from-port servkey action cookie fname params) ;; std-peer-handler
  ;; NOTE: Use rpc:current-peer for getting return address
  (let* ((std-peer-handler-start (current-milliseconds))
	 ;; (raw-data               (alist-ref 'data     dat))
	 (rdat                   (hash-table-ref/default
				  (area-rtable acfg) action #f)) ;; this looks up the sql query or other details indexed by the action
	 (witem                  (make-witem ripaddr: from-ipaddr ;; rhost:   from-host   
					     rport:   from-port   action:  action
					     rdat:    rdat        cookie:  cookie
					     servkey: servkey     data:    params ;; TODO - rename data to params
					     caller:  (rpc:current-peer))))
    (if (not (equal? servkey (area-pktid acfg)))
	`(#f . ,(conc "I don't know you servkey=" servkey ", pktid=" (area-pktid acfg))) ;; immediately return this
	(let* ((ctype (if rdat 
			  (calldat-ctype rdat) ;; is this necessary? these should be identical
			  action)))
	  (sdbg> "std-peer-handler" "immediate" std-peer-handler-start #f #f)
	  (case ctype
	    ;; (dbwrite acfg rdat (cons from-ipaddr from-port) data)))
	    ((full-ping)  `(#t  "ack to full ping"        ,(work-queue-add acfg fname witem) ,cookie))
	    ((response)   `(#t  "ack from requestor"      ,(deliver-response acfg fname params)))
	    ((dbwrite)    `(#t  "db write submitted"      ,(work-queue-add acfg fname witem) ,cookie))
	    ((dbread)     `(#t  "db read submitted"       ,(work-queue-add acfg fname witem) ,cookie  ))
	    ((dbrw)       `(#t  "db read/write submitted" ,cookie))
	    ((osshort)    `(#t  "os short submitted"      ,cookie))
	    ((oslong)     `(#t  "os long submitted"       ,cookie))
	    (else         `(#f  "unrecognised action"     ,ctype)))))))

;; Call this to start the actual server
;;
;; start_server
;;
;;   mode: '
;;   handler: proc which takes pktrecieved as argument
;;

(define (start-server acfg)
(define (setup)
  (let* ((conn (find-free-port-and-open acfg))
	 (port (area-port acfg)))
    (rpc:publish-procedure!
     'delist-db
     (lambda (fname)
       (hash-table-delete! (area-dbs acfg) fname)))
    (rpc:publish-procedure!
     'calling-addr
     (lambda ()
       (rpc:current-peer)))
    (rpc:publish-procedure!
     'ping
     (lambda ()(real-ping acfg)))
    (rpc:publish-procedure!
     'request
     (lambda (from-addr from-port servkey action cookie dbname params)
       (request acfg from-addr from-port servkey action cookie dbname params)))
    (rpc:publish-procedure!
     'response
     (lambda (cookie res-dat)
       (deliver-response acfg cookie res-dat)))
    (area-ready-set! acfg #t)
    (area-conn-set! acfg conn)
    ((rpc:make-server conn) #f)));; ((tcp-listen (rpc:default-server-port)) #t)


  (let* ((udata (make-udat))
	 (cpkts (get-all-captain-pkts udata)) ;; read captain pkts
(define (launch acfg) ;;  #!optional (proc std-peer-handler))
  (print "starting launch")
  (update-known-servers acfg) ;; gotta do this on every start (thus why limit number of publicised servers)
  #;(let ((original-handler (current-exception-handler))) ;; is th
    (lambda (exception)
      (server-exit-procedure)
      (original-handler exception)))
  (on-exit (lambda ()
	     (shutdown acfg))) ;; (finalize-all-db-handles acfg)))
  ;; set up the rpc handler
  (let* ((th1  (make-thread
		(lambda ()(start-server acfg))
		"server thread"))
	 (th2   (make-thread
		 (lambda ()
		   (print "th2 starting")
		   (let loop ()
		     (work-queue-processor acfg)
		     (print "work-queue-processor crashed!")
		     (loop)))
		 "work queue thread")))
    (thread-start! th1)
    (thread-start! th2)
    (let loop ()
      (thread-sleep! 0.025)
      (if (area-ready acfg)
	  #t
	  (loop)))
    ;; attempt to fix my address
    (let* ((all-addr (get-all-ips-sorted)))	     ;; could use (tcp-addresses conn)?
      (let loop ((rem-addrs all-addr))
	(if (null? rem-addrs)
	    (begin
	      (print "ERROR: Failed to figure out the ip address of myself as a server. Giving up.")
	      (exit 1)) ;; BUG Changeme to raising an exception
		
	 (captn (get-winning-pkt cpkts)))
	    (let* ((addr      (car rem-addrs))
		   (good-addr (handle-exceptions
				  exn
				  #f
				((rpc:procedure 'calling-addr addr (area-port acfg))))))
	      (if good-addr
		  (begin
		    (print "Got good-addr of " good-addr)
		    (area-myaddr-set! acfg good-addr))
		  (loop (cdr rem-addrs)))))))
    (register-node acfg (area-myaddr acfg)(area-port acfg))
    (print "INFO: Server started on " (area-myaddr acfg) ":" (area-port acfg))
    ;; (update-known-servers acfg) ;; gotta do this on every start (thus why limit number of publicised servers)
    ))

(define (clear-server-pkt acfg)
  (let ((pktf (area-pktfile acfg)))
    (if pktf (delete-file* pktf))))

(define (shutdown acfg)
  (let (;;(conn (area-conn    acfg))
	(pktf (area-pktfile acfg))
	(port (area-port    acfg)))
    (if pktf (delete-file* pktf))
    (send-all "imshuttingdown")
    ;; (rpc:close-all-connections!) ;; don't know if this is actually needed
    (finalize-all-db-handles acfg)))

    (if captn
(define (send-all msg)
  #f)

	(let* ((port   (alist-ref 'port   captn))
;; given a area record look up all the packets
;;
(define (get-all-server-pkts acfg)
  (let ((all-pkt-files (glob (conc (area-pktsdir acfg) "/*.pkt"))))
    (map (lambda (pkt-file)
	   (read-pkt->alist pkt-file pktspec: *pktspec*))
	 all-pkt-files)))

	       (host   (alist-ref 'host   captn))
#;((Z . "9a0212302295a19610d5796fce0370fa130758e9")
  (port . "34827")
  (pid . "28748")
  (hostname . "zeus")
  (T . "server")
  (D . "1549427032.0"))

	       (ipaddr (alist-ref 'ipaddr captn))
#;(define (get-my-best-address)
  (let ((all-my-addresses (get-all-ips))) ;; (vector->list (hostinfo-addresses (hostname->hostinfo (get-host-name))))))
    (cond
     ((null? all-my-addresses)
      (get-host-name))                                          ;; no interfaces?
     ((eq? (length all-my-addresses) 1)
      (ip->string (car all-my-addresses)))                      ;; only one to choose from, just go with it
     (else 
      (ip->string (car (filter (lambda (x)                      ;; take any but 127.
				 (not (eq? (u8vector-ref x 0) 127)))
			       all-my-addresses)))))))

	       (pid    (alist-ref 'pid    captn))
;; whoami? I am my pkt
;;
(define (whoami? acfg)
  (hash-table-ref/default (area-hosts acfg)(area-pktid acfg) #f))

	       (Z      (alist-ref 'Z      captn)))
;;======================================================================
;; "Client side" operations
;;======================================================================

(define (safe-call call-key host port . params)
  (handle-exceptions
   exn
   (begin
     (print "Call " call-key " to " host ":" port " failed")
     #f)
   (apply (rpc:procedure call-key host port) params)))

;; ;; convert to/from string / sexpr
;; 
;; (define (string->sexpr str)
;;   (if (string? str)
;;       (with-input-from-string str read)
;;       str))
;; 
;; (define (sexpr->string s)
;;   (with-output-to-string (lambda ()(write s))))

;; is the server alive?
;;
(define (ping acfg host port)
  (let* ((myaddr     (area-myaddr acfg))
	 (myport     (area-port   acfg))
	 (start-time (current-milliseconds))
	 (res        (if (and (equal? myaddr host)
			      (equal? myport port))
			 (real-ping acfg)
			 ((rpc:procedure 'ping host port)))))
    (cons (- (current-milliseconds) start-time)
	  res)))

;; returns ( ipaddr port alist-fname=>randnum )
(define (real-ping acfg)
  `(,(area-myaddr acfg) ,(area-port acfg) ,(get-host-stats acfg)))

;; is the server alive AND the queues processing?
;;
#;(define (full-ping acfg servpkt)
  (let* ((start-time (current-milliseconds))
	 (res        (send-message acfg servpkt '(full-ping) 'full-ping)))
    (cons (- (current-milliseconds) start-time)
	  res))) ;; (equal? res "got ping"))))


	  (udat-captain-address-set! udata ipaddr)
;; look up all pkts and get the server id (the hash), port, host/ip
;; store this info in acfg
;; return the number of responsive servers found
;;
;; DO NOT VERIFY THAT THE SERVER IS ALIVE HERE. This is called at times where the current server is not yet alive and cannot ping itself
;;
(define (update-known-servers acfg)
  ;; readll all pkts
  ;; foreach pkt; if it isn't me ping the server; if alive, add to hosts hash, else rm the pkt
  (let* ((start-time (current-milliseconds))
	 (all-pkts  (delete-duplicates
		     (append (get-all-server-pkts acfg)
			     (hash-table-values (area-hosts acfg)))))
	 (hostshash (area-hosts acfg))
	 (my-id     (area-pktid acfg))
	 (pktsdir   (area-pktsdir acfg)) ;; needed to remove pkts from non-responsive servers
	 (numsrvs   0)
	 (delpkt    (lambda (pktsdir sid)
		      (print "clearing out server " sid)
		      (delete-file* (conc pktsdir "/" sid ".pkt"))
		      (hash-table-delete! hostshash sid))))
    (area-last-srvup-set! acfg (current-seconds))
    (for-each
     (lambda (servpkt)
       (if (list? servpkt)
	   ;; (pp servpkt)
	   (let* ((shost (alist-ref 'ipaddr servpkt))
		  (sport (any->number (alist-ref 'port servpkt)))
		  (res   (handle-exceptions
			  exn
			  (begin
			    ;; (print "INFO: bad server on " shost ":" sport)
			    #f)
			  (ping acfg shost sport)))
	  (udat-captain-host-set!    udata host)
		  (sid   (alist-ref 'Z servpkt)) ;; Z code is our name for the server
		  (url   (conc shost ":" sport))
		  )
	     #;(if (or (not res)
		     (null? res))
		 (begin
		   (print "STRANGE: ping of " url " gave " res)))
	     
	  (udat-captain-port-set!    udata port)
	     ;; (print "Got " res " from " shost ":" sport)
	     (match res
		    ((qduration . payload)
		     ;; (print "Server pkt:" (alist-ref 'ipaddr servpkt) ":" (alist-ref 'port servpkt)
		     ;;        (if payload
	  (udat-captain-pid-set!     udata pid)
		     ;;            "Success" "Fail"))
		     (match payload
			    ((host port stats)
			     ;; (print "From " host ":" port " got stats: " stats)
			     (if (and host port stats)
				 (let ((url (conc host ":" port)))
	  (if (ping udata (conc ipaddr ":" port))
				   (hash-table-set! hostshash sid servpkt)
				   ;; store based on host:port
				   (hash-table-set! (area-hoststats acfg) sid stats))
				 (print "missing data from the server, not sure what that means!"))
			     (set! numsrvs (+ numsrvs 1)))
			    (#f
			     (print "Removing pkt " sid " due to #f from server or failed ping")
			     (delpkt pktsdir sid))
			    (else
			     (print "Got ")(pp res)(print " from server ")(pp servpkt) " but response did not match (#f/#t . msg)")))
		    (else
		     ;; here we delete the pkt - can't reach the server, remove it
		     ;; however this logic is inadequate. we should mark the server as checked
		     ;; and not good, if it happens a second time - then remove the pkt
		     ;; or something similar. I.e. don't be too quick to assume the server is wedged or dead
		     ;; could be it is simply too busy to reply
		     (let ((bad-pings (hash-table-ref/default (area-health acfg) url 0)))
		       (if (> bad-pings 1) ;; two bad pings - remove pkt
			   (begin
			     (print "INFO: " bad-pings " bad responses from " url ", deleting pkt " sid)
			     (delpkt pktsdir sid))
			   (begin
			     (print "INFO: " bad-pings " bad responses from " shost ":" sport " not deleting pkt yet")
			     (hash-table-set! (area-health acfg)
					      url
					      (+ (hash-table-ref/default (area-health acfg) url 0) 1))
			     ))
		       ))))
	   ;; servpkt is not actually a pkt?
	   (begin
	     (print "Bad pkt " servpkt))))
     all-pkts)
    (sdbg> "update-known-servers" "end" start-time #f #f " found " numsrvs
	   " servers, pkts: " (map (lambda (p)
				     (alist-ref 'Z p))
				   all-pkts))
    numsrvs))

	      udata
(defstruct srvstat
  (numfiles 0)   ;; number of db files handled by this server - subtract 1 for the db being currently looked at
  (randnum  #f)  ;; tie breaker number assigned to by the server itself - applies only to the db under consideration
  (pkt      #f)) ;; the server pkt

;;(define (srv->srvstat srvpkt)
  
;; Get the server best for given dbname and key
;;
;;   NOTE: key is not currently used. The key points to the kind of query, this may be useful for directing read-only queries.
;;
(define (get-best-server acfg dbname key)
  (let* (;; (servers (hash-table-values (area-hosts acfg)))
	 (servers     (area-hosts acfg))
	 (skeys       (sort (hash-table-keys servers) string>=?)) ;; a stable listing
	 (start-time  (current-milliseconds))
	 (srvstats    (make-hash-table))  ;; srvid => srvstat
	 (url         (conc (area-myaddr acfg) ":" (area-port acfg))))
    ;; (print "scores for " dbname ": " (map (lambda (k)(cons k (calc-server-score acfg dbname k))) skeys))
    (if (null? skeys)
	(if (> (update-known-servers acfg) 0)
	    (get-best-server acfg dbname key) ;; some risk of infinite loop here, TODO add try counter
	    (begin
	      (begin
	      (print "ERROR: no server found!") ;; since this process is also a server this should never happen
	      #f))
	(begin
	  ;; (print "in get-best-server with skeys=" skeys)
	  (if (> (- (current-seconds) (area-last-srvup acfg)) 10)
	      (begin
		(update-known-servers acfg)
		(sdbg> "get-best-server" "update-known-servers" start-time #f #f)))

		(remove-captain-pkt udata captn)
	  ;; for each server look at the list of dbfiles, total number of dbs being handled
	  ;; and the rand number, save the best host
	  ;; also do a delist-db for each server dbfile not used
	  (let* ((best-server       #f)
		 (servers-to-delist (make-hash-table)))
	    (for-each
	     (lambda (srvid)
	       (let* ((server    (hash-table-ref/default servers srvid #f))
		      (stats     (hash-table-ref/default (area-hoststats acfg) srvid '(()))))
		 ;; (print "stats: " stats)
 		 (if server
		     (let* ((dbweights (car stats))
			    (srvload   (length (filter (lambda (x)(not (equal? dbname (car x)))) dbweights)))
			    (dbrec     (alist-ref dbname dbweights equal?))  ;; get the pair with fname . randscore
			    (randnum   (if dbrec
					   dbrec ;; (cdr dbrec)
					   0)))
		       (hash-table-set! srvstats srvid (make-srvstat numfiles: srvload randnum: randnum pkt: server))))))
	     skeys)
	    
	    (let* ((sorted    (sort (hash-table-values srvstats) 
				    (lambda (a b)
				      (let ((numfiles-a (srvstat-numfiles a))
					    (numfiles-b (srvstat-numfiles b))
					    (randnum-a  (srvstat-randnum a))
					    (randnum-b  (srvstat-randnum b)))
					(if (< numfiles-a numfiles-b) ;; Note, I don't think adding an offset works here. Goal was only move file handling to a different server if it has 2 less
					    #t
					    (if (and (equal? numfiles-a numfiles-b)
						     (< randnum-a randnum-b))
						#t
						#f))))))
		(setup))))
		   (best      (if (null? sorted)
				  (begin
				    (print "ERROR: should never be null due to self as server.")
				    #f)
				  (srvstat-pkt (car sorted)))))
	      #;(print "SERVER(" url "): " dbname ": " (map (lambda (srv)
							    (let ((p (srvstat-pkt srv)))
							      (conc (alist-ref 'ipaddr p) ":" (alist-ref 'port p)
								    "(" (srvstat-numfiles srv)","(srvstat-randnum srv)")")))
							    sorted))
	      best))))))
    
	(setup-as-captain udata)) ;; this saves the thread to captain-thread and starts the thread
    ;; send out an "I'm about to exit notice to all known servers"
    ;;
(define (death-imminent acfg)
  '())
    ))

;;======================================================================
;; U L E X  -  T H E   I N T E R E S T I N G   S T U F F ! !
;;======================================================================

;; register a handler
;;   NOTES:
;;     dbinitsql   is reserved for a list of sql statements for initializing the db
;;     dbinitfn    is reserved for a db init function, if exists called after dbinitsql
;;     
(define (register acfg key obj #!optional (ctype 'dbwrite))
  (let ((ht (area-rtable acfg)))
    (if (hash-table-exists? ht key)
	(print "WARNING: redefinition of entry " key))
    (hash-table-set! ht key (make-calldat obj: obj ctype: ctype))))

;; connect to a specific dbfile
;; usage: register-batch acfg '((key1 . sql1) (key2 . sql2) ... )
;; NB// obj is often an sql query
;;
(define (register-batch acfg ctype data)
(define (connect udata dbfname dbtype)
  (let ((ht (area-rtable acfg)))
    (map (lambda (dat)
	   (hash-table-set! ht (car dat)(make-calldat obj: (cdr dat) ctype: ctype)))
	 data)))
  udata)

(define (initialize-area-calls-from-specfile area specfile)
  (let* ((callspec (with-input-from-file specfile read )))
    (for-each (lambda (group)
                (register-batch
                 area
                 (car group)
                 (cdr group)))
              callspec)))

;; get-rentry
;;
(define (get-rentry acfg key)
  (hash-table-ref/default (area-rtable acfg) key #f))

(define (get-rsql acfg key)
  (let ((cdat (get-rentry acfg key)))
    (if cdat
	(calldat-obj cdat)
	#f)))



;; blocking call:
;;    client                         server
;;    ------                         ------
;;    call()
;;    send-message()
;;    nmsg-send()
;;                                   nmsg-receive()
;;                                   nmsg-respond(ack,cookie)
;;    ack, cookie
;;    mbox-thread-wait(cookie)
;;                                   nmsg-send(client,cookie,result)
;;        nmsg-respond(ack)
;;        return result
;;
;; reserved action:
;;    'immediate
;;    'dbinitsql
;;
(define (call acfg dbname action params #!optional (count 0))
  (let* ((call-start-time     (current-milliseconds))
	 (srv                 (get-best-server acfg dbname action))
	 (post-get-start-time (current-milliseconds))
	 (rdat                (hash-table-ref/default (area-rtable acfg) action #f))
	 (myid                (trim-pktid (area-pktid acfg)))
	 (srvid               (trim-pktid (alist-ref 'Z srv)))
	 (cookie              (make-cookie myid)))
    (sdbg> "call" "get-best-server" call-start-time #f call-start-time " from: " myid " to server: " srvid " for " dbname " action: " action " params: " params " rdat: " rdat)
    (print "INFO: call to " (alist-ref 'ipaddr srv) ":" (alist-ref 'port srv) " from " (area-myaddr acfg) ":" (area-port acfg) " for " dbname)
    (if (and srv rdat) ;; need both to dispatch a request
	(let* ((ripaddr  (alist-ref 'ipaddr srv))
	       (rsrvid   (alist-ref 'Z srv))
	       (rport    (any->number (alist-ref 'port   srv)))
	       (res-full (if (and (equal? ripaddr (area-myaddr acfg))
				  (equal? rport   (area-port acfg)))
			     (request acfg ripaddr rport (area-pktid acfg) action cookie dbname params)
			     (safe-call 'request ripaddr rport
					(area-myaddr acfg)
					(area-port   acfg)
					#;(area-pktid acfg)
					rsrvid
					action cookie dbname params))))
	  ;; (print "res-full: " res-full)
	  (match res-full
	    ((response-ok response-msg rem ...)
	     (let* ((send-message-time (current-milliseconds))
		    ;; (match res-full
		    ;;  ((response-ok response-msg)
		    ;; (response-ok  (car res-full))
		    ;; (response-msg (cadr res-full)
		    )

	       ;; (res (take res-full 3))) ;; ctype == action, TODO: converge on one term <<=== what was this? BUG 
	       ;; (print "ulex:call: send-message took " (- send-message-time post-get-start-time) " ms params=" params)
	       (sdbg> "call" "send-message" post-get-start-time #f call-start-time)
	       (cond
		((not response-ok) #f)
		((member response-msg '("db read submitted" "db write submitted"))
		 (let* ((cookie-id   (cadddr res-full))
(define (ping udata host-port)
  (let ((cookie (make-cookie udata)))
			(mbox        (make-mailbox))
			(mbox-time   (current-milliseconds)))
    (send udata host-port 'ping "just pinging" (current-seconds))
		   (hash-table-set! (area-cookie2mbox acfg) cookie-id mbox)
		   (let* ((mbox-timeout-secs    20)
			  (mbox-timeout-result 'MBOX_TIMEOUT)
			  (res                  (mailbox-receive! mbox mbox-timeout-secs mbox-timeout-result))
			  (mbox-receive-time    (current-milliseconds)))
		     (hash-table-delete! (area-cookie2mbox acfg) cookie-id)
		     (sdbg> "call" "mailbox-receive" mbox-time #f call-start-time " from: " myid " to server: " srvid " for " dbname)
		     ;; (print "ulex:call mailbox-receive took " (- mbox-receive-time mbox-time) "ms params=" params)
		     res)))
		(else
		 (print "Unhandled response \""response-msg"\"")
		 #f))
	       ;; depending on what action (i.e. ctype) is we will block here waiting for
	       ;; all the data (mechanism to be determined)
	       ;;
	       ;; if res is a "working on it" then wait
	       ;;    wait for result
	       ;; mailbox thread wait on 
    ;; (mailbox-rec
	       
	       ;; if res is a "can't help you" then try a different server
	       ;; if res is a "ack" (e.g. for one-shot requests) then return res
	       ))
    ))
	    (else
	     (if (< count 10)
		 (let* ((url (conc (alist-ref 'ipaddr srv) ":" (alist-ref 'port srv))))
		   (thread-sleep! 1)
		   (print "ERROR: Bad result from " url ", dbname: " dbname ", action: " action ", params: " params ". Trying again in 1 second.")
		   (call acfg dbname action params (+ count 1)))
		 (begin
		   (error (conc "ERROR: " count " tries, still have improper response res-full=" res-full)))))))
	(begin
	  (if (not rdat)
	      (print "ERROR: action " action " not registered.")
	      (if (< count 10)
		 (begin
		   (thread-sleep! 1)
		   (area-hosts-set! acfg (make-hash-table)) ;; clear out all known hosts
		   (print "ERROR: no server found, srv=" srv ", trying again in 1 seconds")
		   (call acfg dbname action params (+ count 1)))
		 (begin
		   (error (conc "ERROR: no server found after 10 tries, srv=" srv ", giving up."))
		   #;(error "No server available"))))))))


;;======================================================================
;; U T I L I T I E S 
;;======================================================================

;; get a signature for identifing this process
;;
(define (get-process-signature)
  (cons (get-host-name)(current-process-id)))

;;======================================================================
;; S Y S T E M   S T U F F
;;======================================================================

;; get normalized cpu load by reading from /proc/loadavg and
;; /proc/cpuinfo return all three values and the number of real cpus
;; and the number of threads returns alist '((adj-cpu-load
;; . normalized-proc-load) ... etc.  keys: adj-proc-load,
;; adj-core-load, 1m-load, 5m-load, 15m-load
;;
(define (get-normalized-cpu-load)
  (let ((res (get-normalized-cpu-load-raw))
	(default `((adj-proc-load . 2) ;; there is no right answer
		   (adj-core-load . 2)
		   (1m-load       . 2)
		   (5m-load       . 0) ;; causes a large delta - thus causing default of throttling if stuff goes wrong
		   (15m-load      . 0)
		   (proc          . 1)
		   (core          . 1)
		   (phys          . 1)
		   (error         . #t))))
    (cond
     ((and (list? res)
	   (> (length res) 2))
      res)
     ((eq? res #f)   default) ;; add messages?
     ((eq? res #f) default)   ;; this would be the #eof
     (else default))))

(define (get-normalized-cpu-load-raw)
  (let* ((actual-host           (get-host-name))) ;; #f is localhost
    (let ((data  (append 
		  (with-input-from-file "/proc/loadavg" read-lines)
		  (with-input-from-file "/proc/cpuinfo" read-lines)
		  (list "end")))
	  (load-rx  (regexp "^([\\d\\.]+)\\s+([\\d\\.]+)\\s+([\\d\\.]+)\\s+.*$"))
	  (proc-rx  (regexp "^processor\\s+:\\s+(\\d+)\\s*$"))
	  (core-rx  (regexp "^core id\\s+:\\s+(\\d+)\\s*$"))
	  (phys-rx  (regexp "^physical id\\s+:\\s+(\\d+)\\s*$"))
	  (max-num  (lambda (p n)(max (string->number p) n))))
      ;; (print "data=" data)
      (if (null? data) ;; something went wrong
	  #f
	  (let loop ((hed      (car data))
		     (tal      (cdr data))
		     (loads    #f)
		     (proc-num 0)  ;; processor includes threads
		     (phys-num 0)  ;; physical chip on motherboard
		     (core-num 0)) ;; core
	    ;; (print hed ", " loads ", " proc-num ", " phys-num ", " core-num)
	    (if (null? tal) ;; have all our data, calculate normalized load and return result
		(let* ((act-proc (+ proc-num 1))
		       (act-phys (+ phys-num 1))
		       (act-core (+ core-num 1))
		       (adj-proc-load (/ (car loads) act-proc))
		       (adj-core-load (/ (car loads) act-core))
		       (result
			(append (list (cons 'adj-proc-load adj-proc-load)
				      (cons 'adj-core-load adj-core-load))
				(list (cons '1m-load (car loads))
				      (cons '5m-load (cadr loads))
				      (cons '15m-load (caddr loads)))
				(list (cons 'proc act-proc)
				      (cons 'core act-core)
				      (cons 'phys act-phys)))))
		  result)
		(regex-case
		    hed
		  (load-rx  ( x l1 l5 l15 ) (loop (car tal)(cdr tal)(map string->number (list l1 l5 l15)) proc-num phys-num core-num))
		  (proc-rx  ( x p         ) (loop (car tal)(cdr tal) loads           (max-num p proc-num) phys-num core-num))
		  (phys-rx  ( x p         ) (loop (car tal)(cdr tal) loads           proc-num (max-num p phys-num) core-num))
		  (core-rx  ( x c         ) (loop (car tal)(cdr tal) loads           proc-num phys-num (max-num c core-num)))
		  (else 
		   (begin
		     ;; (print "NO MATCH: " hed)
		     (loop (car tal)(cdr tal) loads proc-num phys-num core-num))))))))))

;;======================================================================
(define (get-host-stats acfg)
  (let ((stats-hash (area-stats acfg)))
    ;; use this opportunity to remove references to dbfiles which have not been accessed in a while
    (for-each
     (lambda (dbname)
       (let* ((stats       (hash-table-ref stats-hash dbname))
	      (last-access (stat-when stats)))
	 (if (and (> last-access 0)                             ;; if zero then there has been no access
		  (> (- (current-seconds) last-access) 10))     ;; not used in ten seconds
	     (begin
	       (print "Removing " dbname " from stats list")
	       (hash-table-delete! stats-hash dbname) ;; remove from stats hash
	       (stat-dbs-set! stats (hash-table-keys stats))))))
     (hash-table-keys stats-hash))
    
;; network utilities
    `(,(hash-table->alist (area-dbs acfg)) ;; dbname => randnum
      ,(map (lambda (dbname)  ;; dbname is the db name
	      (cons dbname (stat-when (hash-table-ref stats-hash dbname))))
	    (hash-table-keys stats-hash))
      (cpuload . ,(get-normalized-cpu-load)))))
    #;(stats   . ,(map (lambda (k) ;; create an alist from the stats data
		       (cons k (stat->alist (hash-table-ref (area-stats acfg) k))))
		     (hash-table-keys (area-stats acfg))))

;;======================================================================
#;(trace
 ;; assv
 ;; cdr
 ;; caar
 ;; ;; cdr
 ;; call
 ;; finalize-all-db-handles
 ;; get-all-server-pkts
 ;; get-normalized-cpu-load
 ;; get-normalized-cpu-load-raw
 ;; launch
 ;; nmsg-send
 ;; process-db-queries
 ;; receive-message
 ;; std-peer-handler
 ;; update-known-servers
 ;; work-queue-processor
 )


;;======================================================================
;; netutil
;;   move this back to ulex-netutil.scm someday?
;;======================================================================

;; #include <stdio.h>
;; #include <netinet/in.h>
;; #include <string.h>
;; #include <arpa/inet.h>

(foreign-declare "#include \"sys/types.h\"")
(foreign-declare "#include \"sys/socket.h\"")
(foreign-declare "#include \"ifaddrs.h\"")
(foreign-declare "#include \"arpa/inet.h\"")

;; get IP addresses from ALL interfaces
(define get-all-ips
(define (rate-ip ipaddr)
  (foreign-safe-lambda* scheme-object ()
    "

  (regex-case ipaddr
// from https://stackoverflow.com/questions/17909401/linux-c-get-default-interfaces-ip-address :


    ( "^127\\..*" _ 0 )
    ( "^(10\\.0|192\\.168)\\..*" _ 1 )
    C_word lst = C_SCHEME_END_OF_LIST, len, str, *a;
//    struct ifaddrs *ifa, *i;
//    struct sockaddr *sa;

    struct ifaddrs * ifAddrStruct = NULL;
    struct ifaddrs * ifa = NULL;
    void * tmpAddrPtr = NULL;

    if ( getifaddrs(&ifAddrStruct) != 0)
      C_return(C_SCHEME_FALSE);

//    for (i = ifa; i != NULL; i = i->ifa_next) {
    for (ifa = ifAddrStruct; ifa != NULL; ifa = ifa->ifa_next) {
        if (ifa->ifa_addr->sa_family==AF_INET) { // Check it is
            // a valid IPv4 address
            tmpAddrPtr = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
            char addressBuffer[INET_ADDRSTRLEN];
            inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, INET_ADDRSTRLEN);
//            printf(\"%s IP Address %s\\n\", ifa->ifa_name, addressBuffer);
            len = strlen(addressBuffer);
            a = C_alloc(C_SIZEOF_PAIR + C_SIZEOF_STRING(len));
            str = C_string(&a, len, addressBuffer);
            lst = C_a_pair(&a, str, lst);
        } 

//        else if (ifa->ifa_addr->sa_family==AF_INET6) { // Check it is
//            // a valid IPv6 address
//            tmpAddrPtr = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
//            char addressBuffer[INET6_ADDRSTRLEN];
//            inet_ntop(AF_INET6, tmpAddrPtr, addressBuffer, INET6_ADDRSTRLEN);
////            printf(\"%s IP Address %s\\n\", ifa->ifa_name, addressBuffer);
//            len = strlen(addressBuffer);
//            a = C_alloc(C_SIZEOF_PAIR + C_SIZEOF_STRING(len));
//            str = C_string(&a, len, addressBuffer);
//            lst = C_a_pair(&a, str, lst);
//       }

//       else {
    ( else 2 ) ))
//         printf(\" not an IPv4 address\\n\");
//       }

    }

    freeifaddrs(ifa);
    C_return(lst);

"))

;; Change this to bias for addresses with a reasonable broadcast value?
;;
(define (ip-pref-less? a b)
  (let* ((rate (lambda (ipstr)
                 (regex-case ipstr
                             ( "^127\\." _ 0 )
                             ( "^(10\\.0|192\\.168\\.)\\..*" _ 1 )
                             ( else 2 ) ))))
    (< (rate a) (rate b))))
  (> (rate-ip a) (rate-ip b)))
  

(define (get-my-best-address)
  (let ((all-my-addresses (get-all-ips))
        ;;(all-my-addresses-old (vector->list (hostinfo-addresses (hostname->hostinfo (get-host-name)))))
        )
    (cond

     ;;    		       all-my-addresses))))

     )))

(define (get-all-ips-sorted)
  (sort (get-all-ips) ip-pref-less?))

(define (get-all-ips)
  (map ip->string (vector->list 
		   (hostinfo-addresses
		    (host-information (get-host-name))))))

;; make it a global? Well, it is local to area module

(define *captain-pktspec*
  `((captain (host     . h)
	     (port     . p)
	     (pid      . i)
	     (ipaddr   . a)
	     )
    #;(data   (hostname . h)  ;; sender hostname
	    (port     . p)  ;; sender port
	    (ipaddr   . a)  ;; sender ip
	    (hostkey  . k)  ;; sending host key - store info at server under this key
	    (servkey  . s)  ;; server key - this needs to match at server end or reject the msg
	    (format   . f)  ;; sb=serialized-base64, t=text, sx=sexpr, j=json
	    (data     . d)  ;; base64 encoded slln data
	    )))

;; struct for keeping track of our world
;;(use trace)
;;(trace-call-sites #t)

(defstruct udat
  ;; captain info
  (captain-address #f)
  (captain-host    #f)
  (captain-port    #f)
  (captain-pid     #f)
  (ulex-dir        (conc (get-environment-variable "HOME") "/.ulex"))
  (cpkts-dir       (conc (get-environment-variable "HOME") "/.ulex/pkts"))
  (cpkt-spec       *captain-pktspec*)
  ;; this processes info
  (my-cpkt-key     #f)   ;; put Z card here when I create a pkt for myself as captain
  (my-address      #f)
  (my-hostname     #f)
  (my-port         #f)
  (my-pid          (current-process-id))
  ;; server and handler thread
  (serv-listener   #f)                 ;; this processes server info
  (handler-thread  #f)
  (handlers        (make-hash-table))
  (outgoing-conns  (make-hash-table))  ;; host:port -> conn
  (mboxes          (make-hash-table))  ;; key => mbox
  (work-queue      (make-queue))       ;; most stuff goes here
  (fast-queue      (make-queue))       ;; super quick stuff goes here (e.g. ping)
  (busy            #f)                 ;; is either of the queues busy
  ;; app info
  (appname         #f)
  (dbtypes         (make-hash-table))  ;; this should be an alist but hash is easier. dbtype => [ initproc syncproc ]
  ;; cookies
  (cnum            0) ;; cookie num
  )

;; struct for keeping track of others we are talking to

(defstruct peer
  (addr-port       #f)
  (hostname        #f)
  (pid             #f)
  (inp             #f)  ;; input port from the peer
  (oup             #f)  ;; output port to the peer
  (owns            '()) ;; list of databases this peer is currently handling
  )

(defstruct work
  (peer-dat   #f)
  (handlerkey #f)
  (qrykey     #f)
  (data       #f)
  (start      (current-milliseconds)))

;;======================================================================
;; Captain pkt functions
;;======================================================================

;; given a pkts dir read 
	;;(hash-table-set! ht dbname (pseudo-random-integer 10000)))))
;;
(define (get-all-captain-pkts udata)
  (let* ((pktsdir       (let ((d (udat-cpkts-dir udata)))
			  (if (file-exists? d)
			      d
			      (begin
				(create-directory d #t)
				d))))
	 (all-pkt-files (glob (conc pktsdir "/*.pkt")))
	 (pkt-spec      (udat-cpkt-spec udata)))
    (map (lambda (pkt-file)
	   (read-pkt->alist pkt-file pktspec: pkt-spec))
	 all-pkt-files)))

;; sort by D then Z, return one, choose the oldest then
;; differentiate if needed using the Z key
;;l
(define (get-winning-pkt pkts)
  (if (null? pkts)
      #f
      (car (sort pkts (lambda (a b)
			(let ((ad (string->number (alist-ref 'D a)))
			      (bd (string->number (alist-ref 'D b))))
			  (if (eq? a b)
			      (let ((az (alist-ref 'Z a))
				    (bz (alist-ref 'Z b)))
				(string>=? az bz))
			      (> ad bd))))))))

;; remove pkt associated with captn (the Z key .pkt)
;;
(define (remove-captain-pkt udata captn)
  (let ((Z       (alist-ref 'Z captn))
	(cpktdir (udat-cpkts-dir udata)))
    (delete-file* (conc cpktdir "/" Z ".pkt"))))
    

;;======================================================================
;; server primitives
;;======================================================================

(define (make-cookie udata)
  (let ((newcnum (+ (udat-cnum udata))))
    (udat-cnum-set! udata newcnum)
    (conc (udat-my-address udata) ":"
	  (udat-my-port    udata) "-"
	  (udat-my-pid     udata) "-"
	  newcnum)))

;; create a tcp listener and return a populated udat struct with
;; my port, address, hostname, pid etc.
;; return #f if fail to find a port to allocate.
;;
(define (start-server-find-port udata #!optional (port 4242)) 
  (handle-exceptions
      exn
      (if (< port 65535)(start-server-find-port udata (+ port 1)) #f)
    (connect-server udata port)))

(define (connect-server udata port)
  ;; (tcp-listener-socket LISTENER)(socket-name so)
  ;; sockaddr-address, sockaddr-port, sockaddr->string
  (let* ((tlsn (tcp-listen port 1000 #f)) ;; (tcp-listen TCPPORT [BACKLOG [HOST]])
	 (addr (get-my-best-address))) ;; (hostinfo-addresses (host-information (current-hostname)))
    (udat-my-address-set!    udata addr)
    (udat-my-port-set!       udata port)
    (udat-my-hostname-set!   udata (get-host-name))
    (udat-serv-listener-set! udata tlsn)
    udata))

;; put the host, ip, port and pid into a pkt in
;; the captain pkts dir
;;  - assumes user has already fired up a server
;;    which will be in the udata struct
;;
(define (create-captain-pkt udata)
  (if (not (udat-serv-listener udata))
      (begin
	(print "ERROR: create-captain-pkt called with out a listener")
	#f)
      (let* ((pktdat `((port   . ,(udat-my-port udata))
		       (host   . ,(udat-my-hostname udata))
		       (ipaddr . ,(udat-my-address udata))
		       (pid    . ,(udat-my-pid     udata))))
	     (pktdir  (udat-cpkts-dir udata))
	     (pktspec (udat-cpkt-spec udata))
	     )
	(udat-my-cpkt-key-set!
	 udata
	 (write-alist->pkt
	  pktdir
	  pktdat
	  pktspec: pktspec
	  ptype:   'captain))
	(udat-my-cpkt-key udata))))

;; NB// This needs to be started in a thread
;;
;; setup to be a captain
;;   - start server
;;   - create pkt
;;   - start server port handler
;;
(define (setup-as-captain udata)
  (if (start-server-find-port udata) ;; puts the server in udata
      (if (create-captain-pkt udata)
	  (let* ((th (make-thread (lambda ()
				    (ulex-handler udata)) "Captain handler")))
	    (udat-handler-thread-set! udata th)
	    (thread-start! th))
	  #f)
      #f))

(define (get-peer-dat udata host-port #!optional (hostname #f)(pid #f))
  (let* ((pdat (or (hash-table-ref/default (udat-outgoing-conns udata) host-port #f)
		   (handle-exceptions ;; ERROR - MAKE THIS EXCEPTION HANDLER MORE SPECIFIC
		    exn
		    #f
		    (let ((npdat (make-peer addr-port: host-port)))
		      (if hostname (peer-hostname-set! npdat hostname))
		      (if pid (peer-pid-set! npdat pid))
		      (let-values (((ninp noup)(tcp-connect host-port)))
			(peer-inp-set! npdat ninp)
			(peer-oup-set! npdat noup))
		      (hash-table-set! (udat-outgoing-conns udata) host-port npdat)
		      npdat)))))
    pdat))

(define (get-peer-ports udata host-port #!optional (hostname #f)(pid #f))
  (let ((pdat (get-peer-dat udata host-port hostname pid)))
    (if pdat
	 (values (peer-inp pdat)(peer-oup pdat))
	 (values #f #f))))

;; send structured data to recipient
;;
;;  NOTE: qrykey is what was called the "cookie" previously
;;
(define (send udata host-port handler qrykey data #!key (hostname #f)(pid #f)(params '()))
  (let-values (((inp oup)(get-peer-ports udata host-port hostname pid)))
    ;; CONTROL LINE: (note: removed the hostname - I don't think it adds much value
    ;;
    ;;    handlerkey host:port pid qrykey params ...
    ;;
    (if (and inp oup)
	(begin
	  (write-line (conc
		       handler " "
		       (udat-my-address  udata) ":" (udat-my-port udata) " "
		       ;; (udat-my-hostname udata) " "
		       (udat-my-pid  udata) " "
		       qrykey
		       (if (null? params) "" (conc " " (string-intersperse params " "))))
		      oup)
	  (write-line data oup)
	  #t
	  ;; NOTE: DO NOT BE TEMPTED TO LOOK AT ANY DATA ON INP HERE!
	  ;;       (there is a listener for handling that)
	  )
	#f))) ;; #f means failed to connect and send

;; send a request to the given host-port and register a mailbox in udata
;; wait for the mailbox data and return it
;;
(define (send-receive udata host-port handler qrykey data #!key (hostname #f)(pid #f)(params '()))
  (let ((mbox      (make-mailbox))
	(mbox-time (current-milliseconds))
	(mboxes    (udat-mboxes udata)))
    (hash-table-set! mboxes qrykey mbox)
    (if (send udata host-port handler qrykey data hostname: hostname pid: pid params: params)
	(let* ((mbox-timeout-secs    20)
	       (mbox-timeout-result 'MBOX_TIMEOUT)
	       (res                  (mailbox-receive! mbox mbox-timeout-secs mbox-timeout-result))
	       (mbox-receive-time    (current-milliseconds)))
	  (hash-table-delete! mboxes qrykey)
	  res)
	#f))) ;; #f means failed to communicate

(define (add-to-work-queue udata peer-dat handlerkey qrykey data)
  (let ((wdat (make-work peer-dat: peer-dat handlerkey: handlerkey qrykey: qrykey data: data)))
    (if (udat-busy udata)
	(queue-add! (udat-work-queue udata) wdat)
	(process-work udata wdat)) ;; passing in wdat tells process-work to first process the passed in wdat
    ))

(define (do-work udata wdat)
  #f)

(define (process-work udata #!optional wdat)
  (if wdat (do-work udata wdat)) ;; process wdat
  (let ((wqueue (udat-work-queue udata)))
    (if (not (queue-empty? wqueue))
	(let loop ((wd (queue-remove! wqueue)))
	  (do-work udata wd)
	  (if (not (queue-empty? wqueue))
	      (loop (queue-remove! wqueue)))))))

;; send back ack - this is tcp we are talking about, do we really need an ack?
;;
;; NOTE: No need to send back host:port of self - that is locked in by qrykey
;;
(define (send-ack udata host-port qrykey) ;;  #!optional (hostname #f)(pid #f))
  (send udata host-port "ack" qrykey qrykey)) ;; we must send a second line - for the ack let it be the qrykey 
  
;; 
;;
(define (ulex-handler udata)
  (let* ((serv-listener (udat-serv-listener udata)))
    (let-values (((inp oup)(tcp-accept serv-listener)))
      ;; data comes as two lines
      ;;   handlerkey resp-addr:resp-port hostname pid qrykey [dbpath/dbfile.db]
      ;;   data
      (let loop ((state 'start))
	(let* ((controldat (read-line inp))
	       (data       (read-line inp)))
	  (match (string-split controldat)
	    ((handlerkey host:port pid qrykey params ...)
	     (print "handlerkey: " handlerkey " host:port: " host:port " pid: " pid " qrykey: " qrykey " params: " params)
	     (case (string->symbol handlerkey)
	       ((ack)(print "Got ack!"))
	       ((ping)
		(let* ((proc (hash-table-ref/default (udat-handlers udata) 'ping #f))
		       (val  (if proc (proc) "gotping")))
		  (send udata host:port "version" qrykey val)))
	       ((rucaptain)
		(send udata host:port "iamcaptain" qrykey (if (udat-my-cpkt-key udata)
							      "yes"
							      "no")))
	       (else
		;; (send-ack udata host:port qrykey)
		(add-to-work-queue udata (get-peer-dat udata host:port) handlerkey qrykey data)))
	     (else (print "BAD DATA? handler=" handlerkey " data=" data)))))
	(loop state)))))

;; add a proc to the handler list
(define (register-handler udata key proc)
  (hash-table-set! (udat-handlers udata) key proc))


;;======================================================================
;; Generic db handling
;;   setup a inmem db instance
;;   open connection to on-disk db
;;   sync on-disk db to inmem
;;   get lock in on-disk db for dbowner of this db
;;   put sync-proc, init-proc, on-disk handle, inmem handle in dbconn stuct
;;   return the stuct
;;======================================================================

(defstruct dbconn
  (inmem  #f)
  (conn   #f)
  (sync   #f) ;; sync proc
  (init   #f) ;; init proc
  (lastsync (current-seconds))
  )

(defstruct dbinfo
  (initproc #f)
  (syncproc #f))

;; open inmem and disk database
;;   init with initproc
;;   return db struct
;;
;;   appname; megatest, ulex or something else.
;;
(define (setup-db-connection udata fname-in appname dbtype)
  (let* ((is-ulex (eq? appname 'ulex))
	 (dbinf   (if is-ulex ;; ulex is a built-in special case
		      (make-dbinfo initproc: ulexdb-init syncproc: ulexdb-sync)
		      (hash-table-ref/default (udat-dbtypes udata) dbtype #f)))
	 (initproc (dbinfo-initproc dbinf))
	 (syncproc (dbinfo-syncproc dbinf))
	 (fname   (if is-ulex
		      (conc (udat-ulex-dir udata) "/ulex.db")
		      fname-in))
	 (inmem-db (open-and-initdb udata #f 'inmem (dbinfo-initproc dbinf)))
	 (disk-db  (open-and-initdb udata fname 'disk (dbinfo-initproc dbinf))))
    (make-dbconn inmem: inmem-db conn: disk-db sync: syncproc init: initproc)))

;; dest='inmem or 'disk
;;
(define (open-and-initdb udata filename dest init-proc)
  (let* ((inmem    (eq? dest 'inmem))
	 (dbfile   (if inmem
		       ":INMEM:"
		       filename))
	 (dbexists (if inmem #t (file-exists? dbfile)))
	 (db       (sqlite3:open-database dbfile)))
    (sqlite3:set-busy-handler! db (sqlite3:make-busy-timeout 136000))
    (if (not dbexists)
	(init-proc db))
    db))


;;======================================================================
;; Ulex db
;;======================================================================

(define (ulexdb-init db inmem)
  (sqlite3:with-transaction
   db
   (lambda ()
     (for-each
      (lambda (stmt)
	(if stmt (sqlite3:execute db stmt)))
      `("CREATE TABLE IF NOT EXISTS processes 
                 (id INTEGER PRIMARY KEY,
                  host  TEXT NOT NULL,
                  ipadr TEXT NOT NULL,
                  port  INTEGER NOT NULL,
                  pid   INTEGER NOT NULL,
                  regtime INTEGER DEFAULT (strftime('%s','now')),
                  last_update INTEGER DEFAULT (strftime('%s','now')));"
	(if inmem
	    "CREATE TRIGGER  IF NOT EXISTS update_proces_trigger AFTER UPDATE ON processes
                             FOR EACH ROW
                               BEGIN 
                                 UPDATE processes SET last_update=(strftime('%s','now'))
                                   WHERE id=old.id;
                               END;"
	    #f))))))

;; open databases, do initial sync
(define (ulexdb-sync dbconndat udata)
  #f)


) ;; END OF ULEX


;;; ;;======================================================================
;;; ;; D E B U G   H E L P E R S
;;; ;;======================================================================
;;;     
;;; (define (dbg> . args)
;;;   (with-output-to-port (current-error-port)
;;;     (lambda ()
;;;       (apply print "dbg> " args))))
;;; 
;;; (define (debug-pp . args)
;;;   (if (get-environment-variable "ULEX_DEBUG")
;;;       (with-output-to-port (current-error-port)
;;; 	(lambda ()
;;; 	  (apply pp args)))))
;;; 
;;; (define *default-debug-port* (current-error-port))
;;; 
;;; (define (sdbg> fn stage-name stage-start stage-end start-time . message)
;;;   (if (get-environment-variable "ULEX_DEBUG")
;;;       (with-output-to-port *default-debug-port* 
;;; 	(lambda ()
;;; 	  (apply print "ulex:" fn " " stage-name " took " (- (if stage-end stage-end (current-milliseconds)) stage-start) " ms. "
;;; 		 (if start-time
;;; 		     (conc "total time " (- (current-milliseconds) start-time)
;;; 			   " ms.")
;;; 		     "")
;;; 		 message
;;; 		 )))))

;;======================================================================
;; M A C R O S
;;======================================================================
;; iup callbacks are not dumping the stack, this is a work-around
;;

;; Some of these routines use:
;;
;;     http://www.cs.toronto.edu/~gfb/scheme/simple-macros.html
;;
;; Syntax for defining macros in a simple style similar to function definiton,
;;  when there is a single pattern for the argument list and there are no keywords.
;;
;; (define-simple-syntax (name arg ...) body ...)
;;
;; 
;; (define-syntax define-simple-syntax
;;   (syntax-rules ()
;;     ((_ (name arg ...) body ...)
;;      (define-syntax name (syntax-rules () ((name arg ...) (begin body ...)))))))
;; 
;; (define-simple-syntax (catch-and-dump proc procname)
;;   (handle-exceptions
;;    exn
;;    (begin
;;      (print-call-chain (current-error-port))
;;      (with-output-to-port (current-error-port)
;;        (lambda ()
;;          (print ((condition-property-accessor 'exn 'message) exn))
;;          (print "Callback error in " procname)
;;          (print "Full condition info:\n" (condition->list exn)))))
;;    (proc)))
;; 
;; 
;;======================================================================
;;  R E C O R D S
;;======================================================================

;;; ;; information about me as a server
;;; ;;
;;; (defstruct area
;;;   ;; about this area
;;;   (useportlogger #f)
;;;   (lowport       32768)
;;;   (server-type   'auto)  ;; auto=create up to five servers/pkts, main=create pkts, passive=no pkt (unless there are no pkts at all)
;;;   (conn          #f)
;;;   (port          #f)
;;;   (myaddr        (get-my-best-address))
;;;   pktid          ;; get pkt from hosts table if needed
;;;   pktfile
;;;   pktsdir
;;;   dbdir
;;;   (dbhandles     (make-hash-table)) ;; fname => list-of-dbh, NOTE: Should really never need more than one?
;;;   (mutex         (make-mutex))
;;;   (rtable        (make-hash-table)) ;; registration table of available actions
;;;   (dbs           (make-hash-table)) ;; filename => random number, used for choosing what dbs I serve
;;;   ;; about other servers
;;;   (hosts         (make-hash-table)) ;; key => hostdat
;;;   (hoststats     (make-hash-table)) ;; key => alist of fname => ( qcount . qtime )
;;;   (reqs          (make-hash-table)) ;; uri => queue
;;;   ;; work queues
;;;   (wqueues       (make-hash-table)) ;; fname => qdat
;;;   (stats         (make-hash-table)) ;; fname => totalqueries
;;;   (last-srvup    (current-seconds)) ;; last time we updated the known servers
;;;   (cookie2mbox   (make-hash-table)) ;; map cookie for outstanding request to mailbox of awaiting call
;;;   (ready #f)
;;;   (health        (make-hash-table)) ;; ipaddr:port => num failed pings since last good ping
;;;   )
;;; 
;;; ;; host stats
;;; ;;
;;; (defstruct hostdat
;;;   (pkt      #f)
;;;   (dbload   (make-hash-table))  ;; "dbfile.db" => queries/min
;;;   (hostload #f)                 ;; normalized load ( 5min load / numcpus )
;;;   )
;;; 
;;; ;; dbdat
;;; ;;
;;; (defstruct dbdat
;;;   (dbh    #f)
;;;   (fname  #f)
;;;   (write-access #f)
;;;   (sths   (make-hash-table))  ;; hash mapping query strings to handles
;;;   )
;;; 
;;; ;; qdat
;;; ;;
;;; (defstruct qdat
;;;   (writeq  (make-queue))
;;;   (readq   (make-queue))
;;;   (rwq     (make-queue))
;;;   (logq    (make-queue)) ;; do we need a queue for logging? yes, if we use sqlite3 db for logging
;;;   (osshort (make-queue))
;;;   (oslong  (make-queue))
;;;   (misc    (make-queue)) ;; used for things like ping-full
;;;   )
;;; 
;;; ;; calldat
;;; ;;
;;; (defstruct calldat
;;;   (ctype 'dbwrite)
;;;   (obj   #f)              ;; this would normally be an SQL statement e.g. SELECT, INSERT etc.
;;;   (rtime (current-milliseconds)))
;;; 
;;; ;; make it a global? Well, it is local to area module
;;; 
;;; (define *pktspec*
;;;   `((server (hostname . h)
;;; 	    (port     . p)
;;; 	    (pid      . i)
;;; 	    (ipaddr   . a)
;;; 	    )
;;;     (data   (hostname . h)  ;; sender hostname
;;; 	    (port     . p)  ;; sender port
;;; 	    (ipaddr   . a)  ;; sender ip
;;; 	    (hostkey  . k)  ;; sending host key - store info at server under this key
;;; 	    (servkey  . s)  ;; server key - this needs to match at server end or reject the msg
;;; 	    (format   . f)  ;; sb=serialized-base64, t=text, sx=sexpr, j=json
;;; 	    (data     . d)  ;; base64 encoded slln data
;;; 	    )))
;;; 
;;; ;; work item
;;; ;;
;;; (defstruct witem
;;;   (rhost #f)   ;; return host
;;;   (ripaddr #f) ;; return ipaddr
;;;   (rport #f)   ;; return port
;;;   (servkey #f) ;; the packet representing the client of this workitem, used by final send-message
;;;   (rdat  #f)   ;; the request - usually an sql query, type is rdat
;;;   (action #f)  ;; the action: immediate, dbwrite, dbread,oslong, osshort
;;;   (cookie #f)  ;; cookie id for response
;;;   (data   #f)  ;; the data payload, i.e. parameters
;;;   (result #f)  ;; the result from processing the data
;;;   (caller #f)) ;; the calling peer according to rpc itself
;;; 
;;; (define (trim-pktid pktid)
;;;   (if (string? pktid)
;;;       (substring pktid 0 4)
;;;       "nopkt"))
;;; 
;;; (define (any->number num)
;;;   (cond
;;;    ((number? num) num)
;;;    ((string? num) (string->number num))
;;;    (else num)))
;;; 
;;; (use trace)
;;; (trace-call-sites #t)
;;; 
;;; ;;======================================================================
;;; ;; D A T A B A S E   H A N D L I N G 
;;; ;;======================================================================
;;; 
;;; ;; look in dbhandles for a db, return it, else return #f
;;; ;;
;;; (define (get-dbh acfg fname)
;;;   (let ((dbh-lst (hash-table-ref/default (area-dbhandles acfg) fname '())))
;;;     (if (null? dbh-lst)
;;; 	(begin
;;; 	  ;; (print "opening db for " fname)
;;; 	  (open-db acfg fname)) ;; Note that the handles get put back in the queue in the save-dbh calls
;;; 	(let ((rem-lst (cdr dbh-lst)))
;;; 	  ;; (print "re-using saved connection for " fname)
;;; 	  (hash-table-set! (area-dbhandles acfg) fname rem-lst)
;;; 	  (car dbh-lst)))))
;;; 
;;; (define (save-dbh acfg fname dbdat)
;;;     ;; (print "saving dbh for " fname)
;;;     (hash-table-set! (area-dbhandles acfg) fname (cons dbdat (hash-table-ref/default (area-dbhandles acfg) fname '()))))
;;; 
;;; ;; open the database, if never before opened init it. put the handle in the
;;; ;; open db's hash table
;;; ;; returns: the dbdat
;;; ;;
;;; (define (open-db acfg fname)
;;;   (let* ((fullname     (conc (area-dbdir acfg) "/" fname))
;;; 	 (exists       (file-exists? fullname))
;;; 	 (write-access (if exists
;;; 			   (file-write-access? fullname)
;;; 			   (file-write-access? (area-dbdir acfg))))
;;; 	 (db           (sqlite3:open-database fullname))
;;; 	 (handler      (sqlite3:make-busy-timeout 136000))
;;; 	 )
;;;     (sqlite3:set-busy-handler! db handler)
;;;     (sqlite3:execute db "PRAGMA synchronous = 0;")
;;;     (if (not exists) ;; need to init the db
;;; 	(if write-access
;;; 	    (let ((isql (get-rsql acfg 'dbinitsql))) ;; get the init sql statements
;;; 	      ;; (sqlite3:with-transaction
;;; 	      ;;  db
;;; 	      ;;  (lambda ()
;;; 		 (if isql
;;; 		     (for-each
;;; 		      (lambda (sql)
;;; 			(sqlite3:execute db sql))
;;; 		      isql)))
;;; 	    (print "ERROR: no write access to " (area-dbdir acfg))))
;;;     (make-dbdat dbh: db fname: fname write-access: write-access)))
;;; 
;;; ;; This is a low-level command to retrieve or to prepare, save and return a prepared statment
;;; ;; you must extract the db handle
;;; ;;
;;; (define (get-sth db cache stmt)
;;;   (if (hash-table-exists? cache stmt)
;;;       (begin
;;; 	;; (print "Reusing cached stmt for " stmt)
;;; 	(hash-table-ref/default cache stmt #f))
;;;       (let ((sth (sqlite3:prepare db stmt)))
;;; 	(hash-table-set! cache stmt sth)
;;; 	;; (print "prepared stmt for " stmt)
;;; 	sth)))
;;; 
;;; ;; a little more expensive but does all the tedious deferencing - only use if you don't already
;;; ;; have dbdat and db sitting around
;;; ;;
;;; (define (full-get-sth acfg fname stmt)
;;;   (let* ((dbdat  (get-dbh acfg fname))
;;; 	 (db     (dbdat-dbh dbdat))
;;; 	 (sths   (dbdat-sths dbdat)))
;;;     (get-sth db sths stmt)))
;;; 
;;; ;; write to a db
;;; ;; acfg: area data
;;; ;; rdat: request data
;;; ;; hdat: (host . port)
;;; ;;
;;; ;; (define (dbwrite acfg rdat hdat data-in)
;;; ;;   (let* ((dbname (car data-in))
;;; ;; 	 (dbdat  (get-dbh acfg dbname))
;;; ;; 	 (db     (dbdat-dbh dbdat))
;;; ;; 	 (sths   (dbdat-sths dbdat))
;;; ;; 	 (stmt   (calldat-obj rdat))
;;; ;; 	 (sth    (get-sth db sths stmt))
;;; ;; 	 (data   (cdr data-in)))
;;; ;;     (print "dbname: " dbname " acfg: " acfg " rdat: " (calldat->alist rdat) " hdat: " hdat " data: " data)
;;; ;;     (print "dbdat: " (dbdat->alist dbdat))
;;; ;;     (apply sqlite3:execute sth data)
;;; ;;     (save-dbh acfg dbname dbdat)
;;; ;;     #t
;;; ;;     ))
;;; 
;;; (define (finalize-all-db-handles acfg)
;;;   (let* ((dbhandles (area-dbhandles acfg))  ;; dbhandles is hash of fname ==> dbdat
;;; 	 (num       0))
;;;     (for-each
;;;      (lambda (area-name)
;;;        (print "Closing handles for " area-name)
;;;        (let ((dbdats (hash-table-ref/default dbhandles area-name '())))
;;; 	 (for-each
;;; 	  (lambda (dbdat)
;;; 	    ;; first close all statement handles
;;; 	    (for-each
;;; 	     (lambda (sth)
;;; 	       (sqlite3:finalize! sth)
;;; 	       (set! num (+ num 1)))
;;; 	     (hash-table-values (dbdat-sths dbdat)))
;;; 	    ;; now close the dbh
;;; 	    (set! num (+ num 1))
;;; 	    (sqlite3:finalize! (dbdat-dbh dbdat)))
;;; 	  dbdats)))
;;;      (hash-table-keys dbhandles))
;;;     (print "FINALIZED " num " dbhandles")))
;;; 
;;; ;;======================================================================
;;; ;; W O R K   Q U E U E   H A N D L I N G 
;;; ;;======================================================================
;;; 
;;; (define (register-db-as-mine acfg dbname)
;;;   (let ((ht (area-dbs acfg)))
;;;     (if (not (hash-table-ref/default ht dbname #f))
;;; 	(hash-table-set! ht dbname (random 10000)))))
;;; 	
;;; (define (work-queue-add acfg fname witem)
;;;   (let* ((work-queue-start (current-milliseconds))
;;; 	 (action           (witem-action witem)) ;; NB the action is the index into the rdat actions
;;; 	 (qdat             (or (hash-table-ref/default (area-wqueues acfg) fname #f)
;;; 			       (let ((newqdat (make-qdat)))
;;; 				 (hash-table-set! (area-wqueues acfg) fname newqdat)
;;; 				 newqdat)))
;;; 	 (rdat             (hash-table-ref/default (area-rtable acfg) action #f)))
;;;     (if rdat
;;; 	(queue-add!
;;; 	 (case (calldat-ctype rdat)
;;; 	   ((dbwrite)   (register-db-as-mine acfg fname)(qdat-writeq qdat))
;;; 	   ((dbread)    (register-db-as-mine acfg fname)(qdat-readq  qdat))
;;; 	   ((dbrw)      (register-db-as-mine acfg fname)(qdat-rwq    qdat))
;;; 	   ((oslong)    (qdat-oslong qdat))
;;; 	   ((osshort)   (qdat-osshort qdat))
;;; 	   ((full-ping) (qdat-misc  qdat))
;;; 	   (else
;;; 	    (print "ERROR: no queue for " action ". Adding to dbwrite queue.")
;;; 	    (qdat-writeq qdat)))
;;; 	 witem)
;;; 	(case action
;;; 	  ((full-ping)(qdat-misc qdat))
;;; 	  (else
;;; 	   (print "ERROR: No action " action " was registered"))))
;;;     (sdbg> "work-queue-add" "queue-add" work-queue-start #f #f)
;;;     #t)) ;; for now, simply return #t to indicate request got to the queue
;;; 
;;; (define (doqueue acfg q fname dbdat dbh)
;;;   ;; (print "doqueue: " fname)
;;;   (let* ((start-time (current-milliseconds))
;;; 	 (qlen       (queue-length q)))
;;;     (if (> qlen 1)
;;; 	(print "Processing queue of length " qlen))
;;;     (let loop ((count      0)
;;; 	       (responses '()))
;;;       (let ((delta (- (current-milliseconds) start-time)))
;;; 	(if (or (queue-empty? q)
;;; 		(> delta 400)) ;; stop working on this queue after 400ms have passed
;;; 	    (list count delta responses) ;; return count, delta and responses list
;;; 	    (let* ((witem  (queue-remove! q))
;;; 		   (action (witem-action witem))
;;; 		   (rdat   (witem-rdat   witem))
;;; 		   (stmt   (calldat-obj rdat))
;;; 		   (sth    (full-get-sth acfg fname stmt))
;;; 		   (ctype  (calldat-ctype rdat))
;;; 		   (data   (witem-data   witem))
;;; 		   (cookie (witem-cookie witem)))
;;; 	      ;; do the processing and save the result in witem-result
;;; 	      (witem-result-set!
;;; 	       witem
;;; 	       (case ctype ;; action
;;; 		 ((noblockwrite) ;; blind write, no ack of success returned
;;; 		  (apply sqlite3:execute sth data)
;;; 		  (sqlite3:last-insert-rowid dbh))
;;; 		 ((dbwrite)      ;; blocking write   
;;; 		  (apply sqlite3:execute sth data)
;;; 		  #t)
;;; 		 ((dbread) ;; TODO: consider breaking this up and shipping in pieces for large query
;;; 		  (apply sqlite3:map-row (lambda x x) sth data))
;;; 		 ((full-ping)  'full-ping)
;;; 		 (else (print "Not ready for action " action) #f)))
;;; 	      (loop (add1 count)
;;; 		    (if cookie
;;; 			(cons witem responses)
;;; 			responses))))))))
;;; 
;;; ;; do up to 400ms of processing on each queue
;;; ;; - the work-queue-processor will allow the max 1200ms of work to complete but it will flag as overloaded
;;; ;; 
;;; (define (process-db-queries acfg fname)
;;;   (if (hash-table-exists? (area-wqueues acfg) fname)
;;;       (let* ((process-db-queries-start-time (current-milliseconds))
;;; 	     (qdat             (hash-table-ref/default (area-wqueues acfg) fname #f))
;;; 	     (queue-sym->queue (lambda (queue-sym)
;;; 				 (case queue-sym  ;; lookup the queue from qdat given a name (symbol)
;;; 				   ((wqueue)  (qdat-writeq qdat))
;;; 				   ((rqueue)  (qdat-readq  qdat))
;;; 				   ((rwqueue) (qdat-rwq    qdat))
;;; 				   ((misc)    (qdat-misc   qdat))
;;; 				   (else #f))))
;;; 	     (dbdat   (get-dbh acfg fname))
;;; 	     (dbh     (if (dbdat? dbdat)(dbdat-dbh dbdat) #f))
;;; 	     (nowtime (current-seconds)))
;;; 	;; handle the queues that require a transaction
;;; 	;;
;;; 	(map ;; 
;;; 	 (lambda (queue-sym)
;;; 	   ;; (print "processing queue " queue-sym)
;;; 	   (let* ((queue (queue-sym->queue queue-sym)))
;;; 	     (if (not (queue-empty? queue))
;;; 		 (let ((responses
;;; 			(sqlite3:with-transaction ;; todo - catch exceptions...
;;; 			 dbh
;;; 			 (lambda ()
;;; 			   (let* ((res (doqueue acfg queue fname dbdat dbh))) ;; this does the work!
;;; 			     ;; (print "res=" res)
;;; 			     (match res
;;; 			      ((count delta responses)
;;; 			       (update-stats acfg fname queue-sym delta count)
;;; 			       (sdbg> "process-db-queries" "sqlite3-transaction" process-db-queries-start-time #f #f)
;;; 			       responses) ;; return responses
;;; 			      (else
;;; 			       (print "ERROR: bad return data from doqueue " res)))
;;; 			     )))))
;;; 		   ;; having completed the transaction, send the responses.
;;; 		   ;; (print "INFO: sending " (length responses) " responses.")
;;; 		   (let loop ((responses-left responses))
;;; 		     (cond
;;; 		      ((null? responses-left)  #t)
;;; 		      (else
;;; 		       (let* ((witem    (car responses-left))
;;; 			      (response (cdr responses-left)))  
;;; 			 (call-deliver-response acfg (witem-ripaddr witem)(witem-rport witem)
;;; 						(witem-cookie witem)(witem-result witem)))
;;; 		       (loop (cdr responses-left))))))
;;; 		 )))
;;; 	 '(wqueue rwqueue rqueue))
;;; 	
;;; 	;; handle misc queue
;;; 	;;
;;; 	;; (print "processing misc queue")
;;; 	(let ((queue (queue-sym->queue 'misc)))
;;; 	  (doqueue acfg queue fname dbdat dbh))
;;; 	;; ....
;;; 	(save-dbh acfg fname dbdat)
;;; 	#t ;; just to let the tests know we got here
;;; 	)
;;;       #f ;; nothing processed
;;;       ))
;;; 
;;; ;; run all queues in parallel per db but sequentially per queue for that db.
;;; ;;  - process the queues every 500 or so ms
;;; ;;  - allow for long running queries to continue but all other activities for that
;;; ;;    db will be blocked.
;;; ;;
;;; (define (work-queue-processor acfg)
;;;   (let* ((threads (make-hash-table))) ;; fname => thread
;;;     (let loop ((fnames      (hash-table-keys (area-wqueues acfg)))
;;; 	       (target-time (+ (current-milliseconds) 50)))
;;;       ;;(if (not (null? fnames))(print "Processing for these databases: " fnames))
;;;       (for-each
;;;        (lambda (fname)
;;; 	 ;; (print "processing for " fname)
;;; 	 ;;(process-db-queries acfg fname))
;;; 	 (let ((th (hash-table-ref/default threads fname #f)))
;;; 	   (if (and th (not (member (thread-state th) '(dead terminated))))
;;; 	       (begin
;;; 		 (print "WARNING: worker thread for " fname " is taking a long time.")
;;; 		 (print "Thread is in state " (thread-state th)))
;;; 	       (let ((th1 (make-thread (lambda ()
;;; 					 ;; (catch-and-dump
;;; 					 ;;  (lambda ()
;;; 					    ;; (print "Process queries for " fname)
;;; 					    (let ((start-time (current-milliseconds)))
;;; 					      (process-db-queries acfg fname)
;;; 					      ;; (thread-sleep! 0.01) ;; need the thread to take at least some time
;;; 					      (hash-table-delete! threads fname)) ;; no mutexes?
;;; 					    fname)
;;; 					  "th1"))) ;; ))
;;; 		 (hash-table-set! threads fname th1)
;;; 		 (thread-start! th1)))))
;;;        fnames)
;;;       ;; (thread-sleep! 0.1) ;; give the threads some time to process requests
;;;       ;; burn time until 400ms is up
;;;       (let ((now-time (current-milliseconds)))
;;; 	(if (< now-time target-time)
;;; 	    (let ((delta (- target-time now-time)))
;;; 	      (thread-sleep! (/ delta 1000)))))
;;;       (loop (hash-table-keys (area-wqueues acfg))
;;; 	    (+ (current-milliseconds) 50)))))
;;; 
;;; ;;======================================================================
;;; ;; S T A T S   G A T H E R I N G
;;; ;;======================================================================
;;; 
;;; (defstruct stat
;;;   (qcount-avg  0)                  ;; coarse running average
;;;   (qtime-avg   0)                  ;; coarse running average
;;;   (qcount      0)                  ;; total
;;;   (qtime       0)                  ;; total
;;;   (last-qcount 0)                  ;; last 
;;;   (last-qtime  0)                  ;; last
;;;   (dbs        '())                 ;; list of db files handled by this node
;;;   (when        0))                 ;; when the last query happened - seconds
;;; 
;;; 
;;; (define (update-stats acfg fname bucket duration numqueries)
;;;   (let* ((key   fname) ;; for now do not use bucket. Was: (conc fname "-" bucket)) ;; lazy but good enough
;;; 	 (stats (or (hash-table-ref/default (area-stats acfg) key #f)
;;; 		    (let ((newstats (make-stat)))
;;; 		      (hash-table-set! (area-stats acfg) key newstats)
;;; 		      newstats))))
;;;     ;; when the last query happended (used to remove the fname from the active list)
;;;     (stat-when-set! stats (current-seconds))
;;;     ;; last values
;;;     (stat-last-qcount-set! stats numqueries)
;;;     (stat-last-qtime-set!  stats duration)
;;;     ;; total over process lifetime
;;;     (stat-qcount-set! stats (+ (stat-qcount stats) numqueries))
;;;     (stat-qtime-set!  stats (+ (stat-qtime  stats) duration))
;;;     ;; coarse average
;;;     (stat-qcount-avg-set! stats (/ (+ (stat-qcount-avg stats) numqueries) 2))
;;;     (stat-qtime-avg-set!  stats (/ (+ (stat-qtime-avg  stats) duration)   2))
;;; 
;;;     ;; here is where we add the stats for a given dbfile
;;;     (if (not (member fname (stat-dbs stats)))
;;; 	(stat-dbs-set! stats (cons fname (stat-dbs stats))))
;;; 
;;;     ))
;;; 
;;; ;;======================================================================
;;; ;; S E R V E R   S T U F F 
;;; ;;======================================================================
;;; 
;;; ;; this does NOT return!
;;; ;;
;;; (define (find-free-port-and-open acfg)
;;;   (let ((port (or (area-port acfg) 3200)))
;;;     (handle-exceptions
;;; 	exn
;;; 	(begin
;;; 	  (print "INFO: cannot bind to port " (rpc:default-server-port) ", trying next port")
;;; 	  (area-port-set! acfg (+ port 1))
;;; 	  (find-free-port-and-open acfg))
;;;       (rpc:default-server-port port)
;;;       (area-port-set! acfg port)
;;;       (tcp-read-timeout 120000)
;;;       ;; ((rpc:make-server (tcp-listen port)) #t)
;;;       (tcp-listen (rpc:default-server-port)
;;;       ))))
;;; 
;;; ;; register this node by putting a packet into the pkts dir.
;;; ;; look for other servers
;;; ;; contact other servers and compile list of servers
;;; ;; there are two types of server
;;; ;;     main servers - dashboards, runners and dedicated servers - need pkt
;;; ;;     passive servers - test executers, step calls, list-runs - no pkt
;;; ;;
;;; (define (register-node acfg hostip port-num)
;;;   ;;(mutex-lock! (area-mutex acfg))
;;;   (let* ((server-type  (area-server-type acfg)) ;; auto, main, passive (no pkt created)
;;; 	 (best-ip      (or hostip (get-my-best-address)))
;;; 	 (mtdir        (area-dbdir acfg))
;;; 	 (pktdir       (area-pktsdir acfg))) ;; conc mtdir "/.server-pkts")))
;;;     (print "Registering node " best-ip ":" port-num)
;;;     (if (not mtdir) ;; require a home for this node to put or find databases
;;; 	#f
;;; 	(begin
;;; 	  (if  (not (directory? pktdir))(create-directory pktdir))
;;; 	  ;; server is started, now create pkt if needed
;;; 	  (print "Starting server in " server-type " mode with port " port-num)
;;; 	  (if (member server-type '(auto main)) ;; TODO: if auto, count number of servers registers, if > 3 then don't put out a pkt
;;; 	      (begin
;;; 		(area-pktid-set! acfg
;;; 				 (write-alist->pkt
;;; 				  pktdir 
;;; 				  `((hostname . ,(get-host-name))
;;; 				    (ipaddr   . ,best-ip)
;;; 				    (port     . ,port-num)
;;; 				    (pid      . ,(current-process-id)))
;;; 				  pktspec: *pktspec*
;;; 				  ptype:   'server))
;;; 		(area-pktfile-set! acfg (conc pktdir "/" (area-pktid acfg) ".pkt"))))
;;; 	  (area-port-set!    acfg port-num)
;;; 	  #;(mutex-unlock! (area-mutex acfg))))))
;;; 
;;; (define *cookie-seqnum* 0)
;;; (define (make-cookie key)
;;;   (set! *cookie-seqnum* (add1 *cookie-seqnum*))
;;;   ;;(print "MAKE COOKIE CALLED -- on "servkey"-"*cookie-seqnum*)
;;;   (conc key "-" *cookie-seqnum*)
;;;   )
;;; 
;;; ;; dispatch locally if possible
;;; ;;
;;; (define (call-deliver-response acfg ipaddr port cookie data)
;;;   (if (and (equal? (area-myaddr acfg) ipaddr)
;;; 	   (equal? (area-port     acfg) port))
;;;       (deliver-response acfg cookie data)
;;;       ((rpc:procedure 'response ipaddr port) cookie data)))
;;; 
;;; (define (deliver-response acfg cookie data)
;;;   (let ((deliver-response-start (current-milliseconds)))
;;;     (thread-start! (make-thread
;;; 		    (lambda ()
;;; 		      (let loop ((tries-left 5))
;;; 			;;(print "TOP OF DELIVER_RESPONSE LOOP; triesleft="tries-left)
;;; 			;;(pp (hash-table->alist (area-cookie2mbox acfg)))
;;; 			(let* ((mbox (hash-table-ref/default (area-cookie2mbox acfg) cookie #f)))
;;; 			  (cond
;;; 			   ((eq? 0 tries-left)
;;; 			    (print "ulex:deliver-response: I give up. Mailbox never appeared. cookie="cookie)
;;; 			    )
;;; 			   (mbox
;;; 			    ;;(print "got mbox="mbox"  got data="data"  send.")
;;; 			    (mailbox-send! mbox data))
;;; 			   (else
;;; 			    ;;(print "no mbox yet.  look for "cookie)
;;; 			    (thread-sleep! (/ (- 6 tries-left) 10))
;;; 			    (loop (sub1 tries-left))))))
;;; 		      ;; (debug-pp (list (conc "ulex:deliver-response took " (- (current-milliseconds) deliver-response-start) " ms, cookie=" cookie " data=") data))
;;; 		      (sdbg> "deliver-response" "mailbox-send" deliver-response-start #f #f cookie)
;;; 		      )
;;; 		    (conc "deliver-response thread for cookie="cookie))))
;;;   #t)
;;; 
;;; ;; action:
;;; ;;   immediate - quick actions, no need to put in queues
;;; ;;   dbwrite   - put in dbwrite queue
;;; ;;   dbread    - put in dbread queue
;;; ;;   oslong    - os actions, e.g. du, that could take a long time
;;; ;;   osshort   - os actions that should be quick, e.g. df
;;; ;;
;;; (define (request acfg from-ipaddr from-port servkey action cookie fname params) ;; std-peer-handler
;;;   ;; NOTE: Use rpc:current-peer for getting return address
;;;   (let* ((std-peer-handler-start (current-milliseconds))
;;; 	 ;; (raw-data               (alist-ref 'data     dat))
;;; 	 (rdat                   (hash-table-ref/default
;;; 				  (area-rtable acfg) action #f)) ;; this looks up the sql query or other details indexed by the action
;;; 	 (witem                  (make-witem ripaddr: from-ipaddr ;; rhost:   from-host   
;;; 					     rport:   from-port   action:  action
;;; 					     rdat:    rdat        cookie:  cookie
;;; 					     servkey: servkey     data:    params ;; TODO - rename data to params
;;; 					     caller:  (rpc:current-peer))))
;;;     (if (not (equal? servkey (area-pktid acfg)))
;;; 	`(#f . ,(conc "I don't know you servkey=" servkey ", pktid=" (area-pktid acfg))) ;; immediately return this
;;; 	(let* ((ctype (if rdat 
;;; 			  (calldat-ctype rdat) ;; is this necessary? these should be identical
;;; 			  action)))
;;; 	  (sdbg> "std-peer-handler" "immediate" std-peer-handler-start #f #f)
;;; 	  (case ctype
;;; 	    ;; (dbwrite acfg rdat (cons from-ipaddr from-port) data)))
;;; 	    ((full-ping)  `(#t  "ack to full ping"        ,(work-queue-add acfg fname witem) ,cookie))
;;; 	    ((response)   `(#t  "ack from requestor"      ,(deliver-response acfg fname params)))
;;; 	    ((dbwrite)    `(#t  "db write submitted"      ,(work-queue-add acfg fname witem) ,cookie))
;;; 	    ((dbread)     `(#t  "db read submitted"       ,(work-queue-add acfg fname witem) ,cookie  ))
;;; 	    ((dbrw)       `(#t  "db read/write submitted" ,cookie))
;;; 	    ((osshort)    `(#t  "os short submitted"      ,cookie))
;;; 	    ((oslong)     `(#t  "os long submitted"       ,cookie))
;;; 	    (else         `(#f  "unrecognised action"     ,ctype)))))))
;;; 
;;; ;; Call this to start the actual server
;;; ;;
;;; ;; start_server
;;; ;;
;;; ;;   mode: '
;;; ;;   handler: proc which takes pktrecieved as argument
;;; ;;
;;; 
;;; (define (start-server acfg)
;;;   (let* ((conn (find-free-port-and-open acfg))
;;; 	 (port (area-port acfg)))
;;;     (rpc:publish-procedure!
;;;      'delist-db
;;;      (lambda (fname)
;;;        (hash-table-delete! (area-dbs acfg) fname)))
;;;     (rpc:publish-procedure!
;;;      'calling-addr
;;;      (lambda ()
;;;        (rpc:current-peer)))
;;;     (rpc:publish-procedure!
;;;      'ping
;;;      (lambda ()(real-ping acfg)))
;;;     (rpc:publish-procedure!
;;;      'request
;;;      (lambda (from-addr from-port servkey action cookie dbname params)
;;;        (request acfg from-addr from-port servkey action cookie dbname params)))
;;;     (rpc:publish-procedure!
;;;      'response
;;;      (lambda (cookie res-dat)
;;;        (deliver-response acfg cookie res-dat)))
;;;     (area-ready-set! acfg #t)
;;;     (area-conn-set! acfg conn)
;;;     ((rpc:make-server conn) #f)));; ((tcp-listen (rpc:default-server-port)) #t)
;;; 
;;; 
;;; (define (launch acfg) ;;  #!optional (proc std-peer-handler))
;;;   (print "starting launch")
;;;   (update-known-servers acfg) ;; gotta do this on every start (thus why limit number of publicised servers)
;;;   #;(let ((original-handler (current-exception-handler))) ;; is th
;;;     (lambda (exception)
;;;       (server-exit-procedure)
;;;       (original-handler exception)))
;;;   (on-exit (lambda ()
;;; 	     (shutdown acfg))) ;; (finalize-all-db-handles acfg)))
;;;   ;; set up the rpc handler
;;;   (let* ((th1  (make-thread
;;; 		(lambda ()(start-server acfg))
;;; 		"server thread"))
;;; 	 (th2   (make-thread
;;; 		 (lambda ()
;;; 		   (print "th2 starting")
;;; 		   (let loop ()
;;; 		     (work-queue-processor acfg)
;;; 		     (print "work-queue-processor crashed!")
;;; 		     (loop)))
;;; 		 "work queue thread")))
;;;     (thread-start! th1)
;;;     (thread-start! th2)
;;;     (let loop ()
;;;       (thread-sleep! 0.025)
;;;       (if (area-ready acfg)
;;; 	  #t
;;; 	  (loop)))
;;;     ;; attempt to fix my address
;;;     (let* ((all-addr (get-all-ips-sorted)))	     ;; could use (tcp-addresses conn)?
;;;       (let loop ((rem-addrs all-addr))
;;; 	(if (null? rem-addrs)
;;; 	    (begin
;;; 	      (print "ERROR: Failed to figure out the ip address of myself as a server. Giving up.")
;;; 	      (exit 1)) ;; BUG Changeme to raising an exception
;;; 		
;;; 	    (let* ((addr      (car rem-addrs))
;;; 		   (good-addr (handle-exceptions
;;; 				  exn
;;; 				  #f
;;; 				((rpc:procedure 'calling-addr addr (area-port acfg))))))
;;; 	      (if good-addr
;;; 		  (begin
;;; 		    (print "Got good-addr of " good-addr)
;;; 		    (area-myaddr-set! acfg good-addr))
;;; 		  (loop (cdr rem-addrs)))))))
;;;     (register-node acfg (area-myaddr acfg)(area-port acfg))
;;;     (print "INFO: Server started on " (area-myaddr acfg) ":" (area-port acfg))
;;;     ;; (update-known-servers acfg) ;; gotta do this on every start (thus why limit number of publicised servers)
;;;     ))
;;; 
;;; (define (clear-server-pkt acfg)
;;;   (let ((pktf (area-pktfile acfg)))
;;;     (if pktf (delete-file* pktf))))
;;; 
;;; (define (shutdown acfg)
;;;   (let (;;(conn (area-conn    acfg))
;;; 	(pktf (area-pktfile acfg))
;;; 	(port (area-port    acfg)))
;;;     (if pktf (delete-file* pktf))
;;;     (send-all "imshuttingdown")
;;;     ;; (rpc:close-all-connections!) ;; don't know if this is actually needed
;;;     (finalize-all-db-handles acfg)))
;;; 
;;; (define (send-all msg)
;;;   #f)
;;; 
;;; ;; given a area record look up all the packets
;;; ;;
;;; (define (get-all-server-pkts acfg)
;;;   (let ((all-pkt-files (glob (conc (area-pktsdir acfg) "/*.pkt"))))
;;;     (map (lambda (pkt-file)
;;; 	   (read-pkt->alist pkt-file pktspec: *pktspec*))
;;; 	 all-pkt-files)))
;;; 
;;; #;((Z . "9a0212302295a19610d5796fce0370fa130758e9")
;;;   (port . "34827")
;;;   (pid . "28748")
;;;   (hostname . "zeus")
;;;   (T . "server")
;;;   (D . "1549427032.0"))
;;; 
;;; #;(define (get-my-best-address)
;;;   (let ((all-my-addresses (get-all-ips))) ;; (vector->list (hostinfo-addresses (hostname->hostinfo (get-host-name))))))
;;;     (cond
;;;      ((null? all-my-addresses)
;;;       (get-host-name))                                          ;; no interfaces?
;;;      ((eq? (length all-my-addresses) 1)
;;;       (ip->string (car all-my-addresses)))                      ;; only one to choose from, just go with it
;;;      (else 
;;;       (ip->string (car (filter (lambda (x)                      ;; take any but 127.
;;; 				 (not (eq? (u8vector-ref x 0) 127)))
;;; 			       all-my-addresses)))))))
;;; 
;;; ;; whoami? I am my pkt
;;; ;;
;;; (define (whoami? acfg)
;;;   (hash-table-ref/default (area-hosts acfg)(area-pktid acfg) #f))
;;; 
;;; ;;======================================================================
;;; ;; "Client side" operations
;;; ;;======================================================================
;;; 
;;; (define (safe-call call-key host port . params)
;;;   (handle-exceptions
;;;    exn
;;;    (begin
;;;      (print "Call " call-key " to " host ":" port " failed")
;;;      #f)
;;;    (apply (rpc:procedure call-key host port) params)))
;;; 
;;; ;; ;; convert to/from string / sexpr
;;; ;; 
;;; ;; (define (string->sexpr str)
;;; ;;   (if (string? str)
;;; ;;       (with-input-from-string str read)
;;; ;;       str))
;;; ;; 
;;; ;; (define (sexpr->string s)
;;; ;;   (with-output-to-string (lambda ()(write s))))
;;; 
;;; ;; is the server alive?
;;; ;;
;;; (define (ping acfg host port)
;;;   (let* ((myaddr     (area-myaddr acfg))
;;; 	 (myport     (area-port   acfg))
;;; 	 (start-time (current-milliseconds))
;;; 	 (res        (if (and (equal? myaddr host)
;;; 			      (equal? myport port))
;;; 			 (real-ping acfg)
;;; 			 ((rpc:procedure 'ping host port)))))
;;;     (cons (- (current-milliseconds) start-time)
;;; 	  res)))
;;; 
;;; ;; returns ( ipaddr port alist-fname=>randnum )
;;; (define (real-ping acfg)
;;;   `(,(area-myaddr acfg) ,(area-port acfg) ,(get-host-stats acfg)))
;;; 
;;; ;; is the server alive AND the queues processing?
;;; ;;
;;; #;(define (full-ping acfg servpkt)
;;;   (let* ((start-time (current-milliseconds))
;;; 	 (res        (send-message acfg servpkt '(full-ping) 'full-ping)))
;;;     (cons (- (current-milliseconds) start-time)
;;; 	  res))) ;; (equal? res "got ping"))))
;;; 
;;; 
;;; ;; look up all pkts and get the server id (the hash), port, host/ip
;;; ;; store this info in acfg
;;; ;; return the number of responsive servers found
;;; ;;
;;; ;; DO NOT VERIFY THAT THE SERVER IS ALIVE HERE. This is called at times where the current server is not yet alive and cannot ping itself
;;; ;;
;;; (define (update-known-servers acfg)
;;;   ;; readll all pkts
;;;   ;; foreach pkt; if it isn't me ping the server; if alive, add to hosts hash, else rm the pkt
;;;   (let* ((start-time (current-milliseconds))
;;; 	 (all-pkts  (delete-duplicates
;;; 		     (append (get-all-server-pkts acfg)
;;; 			     (hash-table-values (area-hosts acfg)))))
;;; 	 (hostshash (area-hosts acfg))
;;; 	 (my-id     (area-pktid acfg))
;;; 	 (pktsdir   (area-pktsdir acfg)) ;; needed to remove pkts from non-responsive servers
;;; 	 (numsrvs   0)
;;; 	 (delpkt    (lambda (pktsdir sid)
;;; 		      (print "clearing out server " sid)
;;; 		      (delete-file* (conc pktsdir "/" sid ".pkt"))
;;; 		      (hash-table-delete! hostshash sid))))
;;;     (area-last-srvup-set! acfg (current-seconds))
;;;     (for-each
;;;      (lambda (servpkt)
;;;        (if (list? servpkt)
;;; 	   ;; (pp servpkt)
;;; 	   (let* ((shost (alist-ref 'ipaddr servpkt))
;;; 		  (sport (any->number (alist-ref 'port servpkt)))
;;; 		  (res   (handle-exceptions
;;; 			  exn
;;; 			  (begin
;;; 			    ;; (print "INFO: bad server on " shost ":" sport)
;;; 			    #f)
;;; 			  (ping acfg shost sport)))
;;; 		  (sid   (alist-ref 'Z servpkt)) ;; Z code is our name for the server
;;; 		  (url   (conc shost ":" sport))
;;; 		  )
;;; 	     #;(if (or (not res)
;;; 		     (null? res))
;;; 		 (begin
;;; 		   (print "STRANGE: ping of " url " gave " res)))
;;; 	     
;;; 	     ;; (print "Got " res " from " shost ":" sport)
;;; 	     (match res
;;; 		    ((qduration . payload)
;;; 		     ;; (print "Server pkt:" (alist-ref 'ipaddr servpkt) ":" (alist-ref 'port servpkt)
;;; 		     ;;        (if payload
;;; 		     ;;            "Success" "Fail"))
;;; 		     (match payload
;;; 			    ((host port stats)
;;; 			     ;; (print "From " host ":" port " got stats: " stats)
;;; 			     (if (and host port stats)
;;; 				 (let ((url (conc host ":" port)))
;;; 				   (hash-table-set! hostshash sid servpkt)
;;; 				   ;; store based on host:port
;;; 				   (hash-table-set! (area-hoststats acfg) sid stats))
;;; 				 (print "missing data from the server, not sure what that means!"))
;;; 			     (set! numsrvs (+ numsrvs 1)))
;;; 			    (#f
;;; 			     (print "Removing pkt " sid " due to #f from server or failed ping")
;;; 			     (delpkt pktsdir sid))
;;; 			    (else
;;; 			     (print "Got ")(pp res)(print " from server ")(pp servpkt) " but response did not match (#f/#t . msg)")))
;;; 		    (else
;;; 		     ;; here we delete the pkt - can't reach the server, remove it
;;; 		     ;; however this logic is inadequate. we should mark the server as checked
;;; 		     ;; and not good, if it happens a second time - then remove the pkt
;;; 		     ;; or something similar. I.e. don't be too quick to assume the server is wedged or dead
;;; 		     ;; could be it is simply too busy to reply
;;; 		     (let ((bad-pings (hash-table-ref/default (area-health acfg) url 0)))
;;; 		       (if (> bad-pings 1) ;; two bad pings - remove pkt
;;; 			   (begin
;;; 			     (print "INFO: " bad-pings " bad responses from " url ", deleting pkt " sid)
;;; 			     (delpkt pktsdir sid))
;;; 			   (begin
;;; 			     (print "INFO: " bad-pings " bad responses from " shost ":" sport " not deleting pkt yet")
;;; 			     (hash-table-set! (area-health acfg)
;;; 					      url
;;; 					      (+ (hash-table-ref/default (area-health acfg) url 0) 1))
;;; 			     ))
;;; 		       ))))
;;; 	   ;; servpkt is not actually a pkt?
;;; 	   (begin
;;; 	     (print "Bad pkt " servpkt))))
;;;      all-pkts)
;;;     (sdbg> "update-known-servers" "end" start-time #f #f " found " numsrvs
;;; 	   " servers, pkts: " (map (lambda (p)
;;; 				     (alist-ref 'Z p))
;;; 				   all-pkts))
;;;     numsrvs))
;;; 
;;; (defstruct srvstat
;;;   (numfiles 0)   ;; number of db files handled by this server - subtract 1 for the db being currently looked at
;;;   (randnum  #f)  ;; tie breaker number assigned to by the server itself - applies only to the db under consideration
;;;   (pkt      #f)) ;; the server pkt
;;; 
;;; ;;(define (srv->srvstat srvpkt)
;;;   
;;; ;; Get the server best for given dbname and key
;;; ;;
;;; ;;   NOTE: key is not currently used. The key points to the kind of query, this may be useful for directing read-only queries.
;;; ;;
;;; (define (get-best-server acfg dbname key)
;;;   (let* (;; (servers (hash-table-values (area-hosts acfg)))
;;; 	 (servers     (area-hosts acfg))
;;; 	 (skeys       (sort (hash-table-keys servers) string>=?)) ;; a stable listing
;;; 	 (start-time  (current-milliseconds))
;;; 	 (srvstats    (make-hash-table))  ;; srvid => srvstat
;;; 	 (url         (conc (area-myaddr acfg) ":" (area-port acfg))))
;;;     ;; (print "scores for " dbname ": " (map (lambda (k)(cons k (calc-server-score acfg dbname k))) skeys))
;;;     (if (null? skeys)
;;; 	(if (> (update-known-servers acfg) 0)
;;; 	    (get-best-server acfg dbname key) ;; some risk of infinite loop here, TODO add try counter
;;; 	    (begin
;;; 	      (print "ERROR: no server found!") ;; since this process is also a server this should never happen
;;; 	      #f))
;;; 	(begin
;;; 	  ;; (print "in get-best-server with skeys=" skeys)
;;; 	  (if (> (- (current-seconds) (area-last-srvup acfg)) 10)
;;; 	      (begin
;;; 		(update-known-servers acfg)
;;; 		(sdbg> "get-best-server" "update-known-servers" start-time #f #f)))
;;; 
;;; 	  ;; for each server look at the list of dbfiles, total number of dbs being handled
;;; 	  ;; and the rand number, save the best host
;;; 	  ;; also do a delist-db for each server dbfile not used
;;; 	  (let* ((best-server       #f)
;;; 		 (servers-to-delist (make-hash-table)))
;;; 	    (for-each
;;; 	     (lambda (srvid)
;;; 	       (let* ((server    (hash-table-ref/default servers srvid #f))
;;; 		      (stats     (hash-table-ref/default (area-hoststats acfg) srvid '(()))))
;;; 		 ;; (print "stats: " stats)
;;;  		 (if server
;;; 		     (let* ((dbweights (car stats))
;;; 			    (srvload   (length (filter (lambda (x)(not (equal? dbname (car x)))) dbweights)))
;;; 			    (dbrec     (alist-ref dbname dbweights equal?))  ;; get the pair with fname . randscore
;;; 			    (randnum   (if dbrec
;;; 					   dbrec ;; (cdr dbrec)
;;; 					   0)))
;;; 		       (hash-table-set! srvstats srvid (make-srvstat numfiles: srvload randnum: randnum pkt: server))))))
;;; 	     skeys)
;;; 	    
;;; 	    (let* ((sorted    (sort (hash-table-values srvstats) 
;;; 				    (lambda (a b)
;;; 				      (let ((numfiles-a (srvstat-numfiles a))
;;; 					    (numfiles-b (srvstat-numfiles b))
;;; 					    (randnum-a  (srvstat-randnum a))
;;; 					    (randnum-b  (srvstat-randnum b)))
;;; 					(if (< numfiles-a numfiles-b) ;; Note, I don't think adding an offset works here. Goal was only move file handling to a different server if it has 2 less
;;; 					    #t
;;; 					    (if (and (equal? numfiles-a numfiles-b)
;;; 						     (< randnum-a randnum-b))
;;; 						#t
;;; 						#f))))))
;;; 		   (best      (if (null? sorted)
;;; 				  (begin
;;; 				    (print "ERROR: should never be null due to self as server.")
;;; 				    #f)
;;; 				  (srvstat-pkt (car sorted)))))
;;; 	      #;(print "SERVER(" url "): " dbname ": " (map (lambda (srv)
;;; 							    (let ((p (srvstat-pkt srv)))
;;; 							      (conc (alist-ref 'ipaddr p) ":" (alist-ref 'port p)
;;; 								    "(" (srvstat-numfiles srv)","(srvstat-randnum srv)")")))
;;; 							    sorted))
;;; 	      best))))))
;;;     
;;;     ;; send out an "I'm about to exit notice to all known servers"
;;;     ;;
;;; (define (death-imminent acfg)
;;;   '())
;;; 
;;; ;;======================================================================
;;; ;; U L E X  -  T H E   I N T E R E S T I N G   S T U F F ! !
;;; ;;======================================================================
;;; 
;;; ;; register a handler
;;; ;;   NOTES:
;;; ;;     dbinitsql   is reserved for a list of sql statements for initializing the db
;;; ;;     dbinitfn    is reserved for a db init function, if exists called after dbinitsql
;;; ;;     
;;; (define (register acfg key obj #!optional (ctype 'dbwrite))
;;;   (let ((ht (area-rtable acfg)))
;;;     (if (hash-table-exists? ht key)
;;; 	(print "WARNING: redefinition of entry " key))
;;;     (hash-table-set! ht key (make-calldat obj: obj ctype: ctype))))
;;; 
;;; ;; usage: register-batch acfg '((key1 . sql1) (key2 . sql2) ... )
;;; ;; NB// obj is often an sql query
;;; ;;
;;; (define (register-batch acfg ctype data)
;;;   (let ((ht (area-rtable acfg)))
;;;     (map (lambda (dat)
;;; 	   (hash-table-set! ht (car dat)(make-calldat obj: (cdr dat) ctype: ctype)))
;;; 	 data)))
;;; 
;;; (define (initialize-area-calls-from-specfile area specfile)
;;;   (let* ((callspec (with-input-from-file specfile read )))
;;;     (for-each (lambda (group)
;;;                 (register-batch
;;;                  area
;;;                  (car group)
;;;                  (cdr group)))
;;;               callspec)))
;;; 
;;; ;; get-rentry
;;; ;;
;;; (define (get-rentry acfg key)
;;;   (hash-table-ref/default (area-rtable acfg) key #f))
;;; 
;;; (define (get-rsql acfg key)
;;;   (let ((cdat (get-rentry acfg key)))
;;;     (if cdat
;;; 	(calldat-obj cdat)
;;; 	#f)))
;;; 
;;; 
;;; 
;;; ;; blocking call:
;;; ;;    client                         server
;;; ;;    ------                         ------
;;; ;;    call()
;;; ;;    send-message()
;;; ;;    nmsg-send()
;;; ;;                                   nmsg-receive()
;;; ;;                                   nmsg-respond(ack,cookie)
;;; ;;    ack, cookie
;;; ;;    mbox-thread-wait(cookie)
;;; ;;                                   nmsg-send(client,cookie,result)
;;; ;;        nmsg-respond(ack)
;;; ;;        return result
;;; ;;
;;; ;; reserved action:
;;; ;;    'immediate
;;; ;;    'dbinitsql
;;; ;;
;;; (define (call acfg dbname action params #!optional (count 0))
;;;   (let* ((call-start-time     (current-milliseconds))
;;; 	 (srv                 (get-best-server acfg dbname action))
;;; 	 (post-get-start-time (current-milliseconds))
;;; 	 (rdat                (hash-table-ref/default (area-rtable acfg) action #f))
;;; 	 (myid                (trim-pktid (area-pktid acfg)))
;;; 	 (srvid               (trim-pktid (alist-ref 'Z srv)))
;;; 	 (cookie              (make-cookie myid)))
;;;     (sdbg> "call" "get-best-server" call-start-time #f call-start-time " from: " myid " to server: " srvid " for " dbname " action: " action " params: " params " rdat: " rdat)
;;;     (print "INFO: call to " (alist-ref 'ipaddr srv) ":" (alist-ref 'port srv) " from " (area-myaddr acfg) ":" (area-port acfg) " for " dbname)
;;;     (if (and srv rdat) ;; need both to dispatch a request
;;; 	(let* ((ripaddr  (alist-ref 'ipaddr srv))
;;; 	       (rsrvid   (alist-ref 'Z srv))
;;; 	       (rport    (any->number (alist-ref 'port   srv)))
;;; 	       (res-full (if (and (equal? ripaddr (area-myaddr acfg))
;;; 				  (equal? rport   (area-port acfg)))
;;; 			     (request acfg ripaddr rport (area-pktid acfg) action cookie dbname params)
;;; 			     (safe-call 'request ripaddr rport
;;; 					(area-myaddr acfg)
;;; 					(area-port   acfg)
;;; 					#;(area-pktid acfg)
;;; 					rsrvid
;;; 					action cookie dbname params))))
;;; 	  ;; (print "res-full: " res-full)
;;; 	  (match res-full
;;; 	    ((response-ok response-msg rem ...)
;;; 	     (let* ((send-message-time (current-milliseconds))
;;; 		    ;; (match res-full
;;; 		    ;;  ((response-ok response-msg)
;;; 		    ;; (response-ok  (car res-full))
;;; 		    ;; (response-msg (cadr res-full)
;;; 		    )
;;; 	       ;; (res (take res-full 3))) ;; ctype == action, TODO: converge on one term <<=== what was this? BUG 
;;; 	       ;; (print "ulex:call: send-message took " (- send-message-time post-get-start-time) " ms params=" params)
;;; 	       (sdbg> "call" "send-message" post-get-start-time #f call-start-time)
;;; 	       (cond
;;; 		((not response-ok) #f)
;;; 		((member response-msg '("db read submitted" "db write submitted"))
;;; 		 (let* ((cookie-id   (cadddr res-full))
;;; 			(mbox        (make-mailbox))
;;; 			(mbox-time   (current-milliseconds)))
;;; 		   (hash-table-set! (area-cookie2mbox acfg) cookie-id mbox)
;;; 		   (let* ((mbox-timeout-secs    20)
;;; 			  (mbox-timeout-result 'MBOX_TIMEOUT)
;;; 			  (res                  (mailbox-receive! mbox mbox-timeout-secs mbox-timeout-result))
;;; 			  (mbox-receive-time    (current-milliseconds)))
;;; 		     (hash-table-delete! (area-cookie2mbox acfg) cookie-id)
;;; 		     (sdbg> "call" "mailbox-receive" mbox-time #f call-start-time " from: " myid " to server: " srvid " for " dbname)
;;; 		     ;; (print "ulex:call mailbox-receive took " (- mbox-receive-time mbox-time) "ms params=" params)
;;; 		     res)))
;;; 		(else
;;; 		 (print "Unhandled response \""response-msg"\"")
;;; 		 #f))
;;; 	       ;; depending on what action (i.e. ctype) is we will block here waiting for
;;; 	       ;; all the data (mechanism to be determined)
;;; 	       ;;
;;; 	       ;; if res is a "working on it" then wait
;;; 	       ;;    wait for result
;;; 	       ;; mailbox thread wait on 
;;; 	       
;;; 	       ;; if res is a "can't help you" then try a different server
;;; 	       ;; if res is a "ack" (e.g. for one-shot requests) then return res
;;; 	       ))
;;; 	    (else
;;; 	     (if (< count 10)
;;; 		 (let* ((url (conc (alist-ref 'ipaddr srv) ":" (alist-ref 'port srv))))
;;; 		   (thread-sleep! 1)
;;; 		   (print "ERROR: Bad result from " url ", dbname: " dbname ", action: " action ", params: " params ". Trying again in 1 second.")
;;; 		   (call acfg dbname action params (+ count 1)))
;;; 		 (begin
;;; 		   (error (conc "ERROR: " count " tries, still have improper response res-full=" res-full)))))))
;;; 	(begin
;;; 	  (if (not rdat)
;;; 	      (print "ERROR: action " action " not registered.")
;;; 	      (if (< count 10)
;;; 		 (begin
;;; 		   (thread-sleep! 1)
;;; 		   (area-hosts-set! acfg (make-hash-table)) ;; clear out all known hosts
;;; 		   (print "ERROR: no server found, srv=" srv ", trying again in 1 seconds")
;;; 		   (call acfg dbname action params (+ count 1)))
;;; 		 (begin
;;; 		   (error (conc "ERROR: no server found after 10 tries, srv=" srv ", giving up."))
;;; 		   #;(error "No server available"))))))))
;;; 
;;; 
;;; ;;======================================================================
;;; ;; U T I L I T I E S 
;;; ;;======================================================================
;;; 
;;; ;; get a signature for identifing this process
;;; ;;
;;; (define (get-process-signature)
;;;   (cons (get-host-name)(current-process-id)))
;;; 
;;; ;;======================================================================
;;; ;; S Y S T E M   S T U F F
;;; ;;======================================================================
;;; 
;;; ;; get normalized cpu load by reading from /proc/loadavg and
;;; ;; /proc/cpuinfo return all three values and the number of real cpus
;;; ;; and the number of threads returns alist '((adj-cpu-load
;;; ;; . normalized-proc-load) ... etc.  keys: adj-proc-load,
;;; ;; adj-core-load, 1m-load, 5m-load, 15m-load
;;; ;;
;;; (define (get-normalized-cpu-load)
;;;   (let ((res (get-normalized-cpu-load-raw))
;;; 	(default `((adj-proc-load . 2) ;; there is no right answer
;;; 		   (adj-core-load . 2)
;;; 		   (1m-load       . 2)
;;; 		   (5m-load       . 0) ;; causes a large delta - thus causing default of throttling if stuff goes wrong
;;; 		   (15m-load      . 0)
;;; 		   (proc          . 1)
;;; 		   (core          . 1)
;;; 		   (phys          . 1)
;;; 		   (error         . #t))))
;;;     (cond
;;;      ((and (list? res)
;;; 	   (> (length res) 2))
;;;       res)
;;;      ((eq? res #f)   default) ;; add messages?
;;;      ((eq? res #f) default)   ;; this would be the #eof
;;;      (else default))))
;;; 
;;; (define (get-normalized-cpu-load-raw)
;;;   (let* ((actual-host           (get-host-name))) ;; #f is localhost
;;;     (let ((data  (append 
;;; 		  (with-input-from-file "/proc/loadavg" read-lines)
;;; 		  (with-input-from-file "/proc/cpuinfo" read-lines)
;;; 		  (list "end")))
;;; 	  (load-rx  (regexp "^([\\d\\.]+)\\s+([\\d\\.]+)\\s+([\\d\\.]+)\\s+.*$"))
;;; 	  (proc-rx  (regexp "^processor\\s+:\\s+(\\d+)\\s*$"))
;;; 	  (core-rx  (regexp "^core id\\s+:\\s+(\\d+)\\s*$"))
;;; 	  (phys-rx  (regexp "^physical id\\s+:\\s+(\\d+)\\s*$"))
;;; 	  (max-num  (lambda (p n)(max (string->number p) n))))
;;;       ;; (print "data=" data)
;;;       (if (null? data) ;; something went wrong
;;; 	  #f
;;; 	  (let loop ((hed      (car data))
;;; 		     (tal      (cdr data))
;;; 		     (loads    #f)
;;; 		     (proc-num 0)  ;; processor includes threads
;;; 		     (phys-num 0)  ;; physical chip on motherboard
;;; 		     (core-num 0)) ;; core
;;; 	    ;; (print hed ", " loads ", " proc-num ", " phys-num ", " core-num)
;;; 	    (if (null? tal) ;; have all our data, calculate normalized load and return result
;;; 		(let* ((act-proc (+ proc-num 1))
;;; 		       (act-phys (+ phys-num 1))
;;; 		       (act-core (+ core-num 1))
;;; 		       (adj-proc-load (/ (car loads) act-proc))
;;; 		       (adj-core-load (/ (car loads) act-core))
;;; 		       (result
;;; 			(append (list (cons 'adj-proc-load adj-proc-load)
;;; 				      (cons 'adj-core-load adj-core-load))
;;; 				(list (cons '1m-load (car loads))
;;; 				      (cons '5m-load (cadr loads))
;;; 				      (cons '15m-load (caddr loads)))
;;; 				(list (cons 'proc act-proc)
;;; 				      (cons 'core act-core)
;;; 				      (cons 'phys act-phys)))))
;;; 		  result)
;;; 		(regex-case
;;; 		    hed
;;; 		  (load-rx  ( x l1 l5 l15 ) (loop (car tal)(cdr tal)(map string->number (list l1 l5 l15)) proc-num phys-num core-num))
;;; 		  (proc-rx  ( x p         ) (loop (car tal)(cdr tal) loads           (max-num p proc-num) phys-num core-num))
;;; 		  (phys-rx  ( x p         ) (loop (car tal)(cdr tal) loads           proc-num (max-num p phys-num) core-num))
;;; 		  (core-rx  ( x c         ) (loop (car tal)(cdr tal) loads           proc-num phys-num (max-num c core-num)))
;;; 		  (else 
;;; 		   (begin
;;; 		     ;; (print "NO MATCH: " hed)
;;; 		     (loop (car tal)(cdr tal) loads proc-num phys-num core-num))))))))))
;;; 
;;; (define (get-host-stats acfg)
;;;   (let ((stats-hash (area-stats acfg)))
;;;     ;; use this opportunity to remove references to dbfiles which have not been accessed in a while
;;;     (for-each
;;;      (lambda (dbname)
;;;        (let* ((stats       (hash-table-ref stats-hash dbname))
;;; 	      (last-access (stat-when stats)))
;;; 	 (if (and (> last-access 0)                             ;; if zero then there has been no access
;;; 		  (> (- (current-seconds) last-access) 10))     ;; not used in ten seconds
;;; 	     (begin
;;; 	       (print "Removing " dbname " from stats list")
;;; 	       (hash-table-delete! stats-hash dbname) ;; remove from stats hash
;;; 	       (stat-dbs-set! stats (hash-table-keys stats))))))
;;;      (hash-table-keys stats-hash))
;;;     
;;;     `(,(hash-table->alist (area-dbs acfg)) ;; dbname => randnum
;;;       ,(map (lambda (dbname)  ;; dbname is the db name
;;; 	      (cons dbname (stat-when (hash-table-ref stats-hash dbname))))
;;; 	    (hash-table-keys stats-hash))
;;;       (cpuload . ,(get-normalized-cpu-load)))))
;;;     #;(stats   . ,(map (lambda (k) ;; create an alist from the stats data
;;; 		       (cons k (stat->alist (hash-table-ref (area-stats acfg) k))))
;;; 		     (hash-table-keys (area-stats acfg))))
;;; 
;;; #;(trace
;;;  ;; assv
;;;  ;; cdr
;;;  ;; caar
;;;  ;; ;; cdr
;;;  ;; call
;;;  ;; finalize-all-db-handles
;;;  ;; get-all-server-pkts
;;;  ;; get-normalized-cpu-load
;;;  ;; get-normalized-cpu-load-raw
;;;  ;; launch
;;;  ;; nmsg-send
;;;  ;; process-db-queries
;;;  ;; receive-message
;;;  ;; std-peer-handler
;;;  ;; update-known-servers
;;;  ;; work-queue-processor
;;;  )
;;; 
;;; ;;======================================================================
;;; ;; netutil
;;; ;;   move this back to ulex-netutil.scm someday?
;;; ;;======================================================================
;;; 
;;; ;; #include <stdio.h>
;;; ;; #include <netinet/in.h>
;;; ;; #include <string.h>
;;; ;; #include <arpa/inet.h>
;;; 
;;; (foreign-declare "#include \"sys/types.h\"")
;;; (foreign-declare "#include \"sys/socket.h\"")
;;; (foreign-declare "#include \"ifaddrs.h\"")
;;; (foreign-declare "#include \"arpa/inet.h\"")
;;; 
;;; ;; get IP addresses from ALL interfaces
;;; (define get-all-ips
;;;   (foreign-safe-lambda* scheme-object ()
;;;     "
;;; 
;;; // from https://stackoverflow.com/questions/17909401/linux-c-get-default-interfaces-ip-address :
;;; 
;;; 
;;;     C_word lst = C_SCHEME_END_OF_LIST, len, str, *a;
;;; //    struct ifaddrs *ifa, *i;
;;; //    struct sockaddr *sa;
;;; 
;;;     struct ifaddrs * ifAddrStruct = NULL;
;;;     struct ifaddrs * ifa = NULL;
;;;     void * tmpAddrPtr = NULL;
;;; 
;;;     if ( getifaddrs(&ifAddrStruct) != 0)
;;;       C_return(C_SCHEME_FALSE);
;;; 
;;; //    for (i = ifa; i != NULL; i = i->ifa_next) {
;;;     for (ifa = ifAddrStruct; ifa != NULL; ifa = ifa->ifa_next) {
;;;         if (ifa->ifa_addr->sa_family==AF_INET) { // Check it is
;;;             // a valid IPv4 address
;;;             tmpAddrPtr = &((struct sockaddr_in *)ifa->ifa_addr)->sin_addr;
;;;             char addressBuffer[INET_ADDRSTRLEN];
;;;             inet_ntop(AF_INET, tmpAddrPtr, addressBuffer, INET_ADDRSTRLEN);
;;; //            printf(\"%s IP Address %s\\n\", ifa->ifa_name, addressBuffer);
;;;             len = strlen(addressBuffer);
;;;             a = C_alloc(C_SIZEOF_PAIR + C_SIZEOF_STRING(len));
;;;             str = C_string(&a, len, addressBuffer);
;;;             lst = C_a_pair(&a, str, lst);
;;;         } 
;;; 
;;; //        else if (ifa->ifa_addr->sa_family==AF_INET6) { // Check it is
;;; //            // a valid IPv6 address
;;; //            tmpAddrPtr = &((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr;
;;; //            char addressBuffer[INET6_ADDRSTRLEN];
;;; //            inet_ntop(AF_INET6, tmpAddrPtr, addressBuffer, INET6_ADDRSTRLEN);
;;; ////            printf(\"%s IP Address %s\\n\", ifa->ifa_name, addressBuffer);
;;; //            len = strlen(addressBuffer);
;;; //            a = C_alloc(C_SIZEOF_PAIR + C_SIZEOF_STRING(len));
;;; //            str = C_string(&a, len, addressBuffer);
;;; //            lst = C_a_pair(&a, str, lst);
;;; //       }
;;; 
;;; //       else {
;;; //         printf(\" not an IPv4 address\\n\");
;;; //       }
;;; 
;;;     }
;;; 
;;;     freeifaddrs(ifa);
;;;     C_return(lst);
;;; 
;;; "))
;;; 
;;; ;; Change this to bias for addresses with a reasonable broadcast value?
;;; ;;
;;; (define (ip-pref-less? a b)
;;;   (let* ((rate (lambda (ipstr)
;;;                  (regex-case ipstr
;;;                              ( "^127\\." _ 0 )
;;;                              ( "^(10\\.0|192\\.168\\.)\\..*" _ 1 )
;;;                              ( else 2 ) ))))
;;;     (< (rate a) (rate b))))
;;;   
;;; 
;;; (define (get-my-best-address)
;;;   (let ((all-my-addresses (get-all-ips))
;;;         ;;(all-my-addresses-old (vector->list (hostinfo-addresses (hostname->hostinfo (get-host-name)))))
;;;         )
;;;     (cond
;;;      ((null? all-my-addresses)
;;;       (get-host-name))                                          ;; no interfaces?
;;;      ((eq? (length all-my-addresses) 1)
;;;       (car all-my-addresses))                      ;; only one to choose from, just go with it
;;;      
;;;      (else
;;;       (car (sort all-my-addresses ip-pref-less?)))
;;;      ;; (else 
;;;      ;;  (ip->string (car (filter (lambda (x)                      ;; take any but 127.
;;;      ;;    			 (not (eq? (u8vector-ref x 0) 127)))
;;;      ;;    		       all-my-addresses))))
;;; 
;;;      )))
;;; 
;;; (define (get-all-ips-sorted)
;;;   (sort (get-all-ips) ip-pref-less?))
;;; 
;;; 
)