Megatest

# make install CSCOPTS='-accumulate-profile -profile-name $(PWD)/profile-ww$(shell date +%V.%u)'
PREFIX=$(PWD)
CSCOPTS= 
INSTALL=install
SRCFILES = common.scm items.scm launch.scm \
           ods.scm runconfig.scm server.scm configf.scm \
           db.scm keys.scm margs.scm megatest-version.scm \
           process.scm runs.scm tasks.scm tests.scm genexample.scm \
	   http-transport.scm filedb.scm \
           client.scm gutils.scm synchash.scm daemon.scm mt.scm dcommon.scm \
	   tree.scm ezsteps.scm lock-queue.scm sdb.scm \
	   rmt.scm api.scm tdb.scm rpc-transport.scm

GUISRCF  = dashboard-tests.scm dashboard-guimonitor.scm 

OFILES   = $(SRCFILES:%.scm=%.o)
GOFILES  = $(GUISRCF:%.scm=%.o)

ADTLSCR=mt_laststep mt_runstep mt_ezstep

# Special dependencies for the includes
tests.o db.o launch.o runs.o dashboard-tests.o dashboard-guimonitor.o dashboard-main.o monitor.o dashboard.o megatest.o : db_records.scm
tests.o runs.o dashboard.o dashboard-tests.o dashboard-main.o  : run_records.scm
db.o ezsteps.o keys.o launch.o megatest.o monitor.o runs-for-ref.o runs.o tests.o : key_records.scm
tests.o tasks.o dashboard-tasks.o : task_records.scm
runs.o : test_records.scm
megatest.o : megatest-fossil-hash.scm
client.scm common.scm configf.scm dashboard-guimonitor.scm dashboard-tests.scm dashboard.scm db.scm dcommon.scm ezsteps.scm fs-transport.scm http-transport.scm index-tree.scm items.scm keys.scm launch.scm megatest.scm monitor.scm mt.scm newdashboard.scm runconfig.scm runs.scm server.scm tdb.scm tests.scm tree.scm zmq-transport.scm : common_records.scm rpc-transport.scm

# Temporary while transitioning to new routine
# runs.o : run-tests-queue-classic.scm  run-tests-queue-new.scm

megatest-fossil-hash.scm : $(SRCFILES) megatest.scm *_records.scm
	echo "(define megatest-fossil-hash \"$(MTESTHASH)\")" > megatest-fossil-hash.new
	if ! diff -q megatest-fossil-hash.new megatest-fossil-hash.scm ; then echo copying .new to .scm;cp -f megatest-fossil-hash.new megatest-fossil-hash.scm;fi

;; Not currently used! But, I think it *should* be used!!!
(define (client:logout serverdat)
  (let ((ok (and (socket? serverdat)
		 (cdb:logout serverdat *toppath* (client:get-signature)))))
    ok))

(define (client:connect iface port)
  (case (server:get-transport)
    ((rpc)  (rpc:client-connect  iface port))
    ((http) (http:client-connect iface port))
    ((zmq)  (zmq:client-connect  iface port))
    (else   (rpc:client-connect  iface port))))

(define (client:login-no-auto-setup server-info run-id)
  (case (server:get-transport)
    ((rpc)  (rpc:login-no-auto-client-setup server-info run-id))
    ((http) (rmt:login-no-auto-client-setup server-info run-id))
    (else   (rpc:login-no-auto-client-setup server-info run-id))))

(define (client:setup  run-id #!key (remaining-tries 10) (failed-connects 0))
  (case (server:get-transport)
    ((rpc) (rpc-transport:client-setup run-id)) ;;(client:setup-rpc run-id))
    ((http)(client:setup-http run-id))
    (else  (rpc-transport:client-setup run-id)))) ;; (client:setup-rpc run-id))))

;; (define (client:setup-rpc run-id)
;;   (debug:print 0 "INFO: client:setup remaining-tries=" remaining-tries)
;;   (if (<= remaining-tries 0)
;;       (begin
;; 	(debug:print 0 "ERROR: failed to start or connect to server for run-id " run-id)
;; 	(exit 1))
;;       (let ((host-info (hash-table-ref/default *runremote* run-id #f)))
;; 	(debug:print-info 0 "client:setup host-info=" host-info ", remaining-tries=" remaining-tries)
;; 	(if host-info
;; 	    (let* ((iface     (car  host-info))
;; 		   (port      (cadr host-info))
;; 		   (start-res (client:connect iface port))
;; 		   ;; (ping-res  (server:ping-server run-id iface port))
;; 		   (ping-res  (client:login-no-auto-setup start-res run-id)))
;; 	      (if ping-res   ;; sucessful login?
;; 		  (begin
;; 		    (hash-table-set! *runremote* run-id start-res)
;; 		    start-res)  ;; return the server info
;; 		  (if (member remaining-tries '(3 4 6))
;; 		      (begin    ;; login failed
;; 			(debug:print 25 "INFO: client:setup start-res=" start-res ", run-id=" run-id ", server-dat=" host-info)
;; 			(hash-table-delete! *runremote* run-id)
;; 			(open-run-close tasks:server-force-clean-run-record
;; 			 		tasks:open-db
;; 			 		run-id 
;; 			 		(car  host-info)
;; 			 		(cadr host-info)
;; 					" client:setup (host-info=#t)")
;; 			(thread-sleep! 5)
;; 			(client:setup run-id remaining-tries: 10)) ;; (- remaining-tries 1)))
;; 		      (begin
;; 			(debug:print 25 "INFO: client:setup failed to connect, start-res=" start-res ", run-id=" run-id ", host-info=" host-info)
;; 			(thread-sleep! 5)
;; 			(client:setup run-id remaining-tries: (- remaining-tries 1))))))
;; 	    ;; YUK: rename server-dat here
;; 	    (let* ((server-dat (open-run-close tasks:get-server tasks:open-db run-id)))
;; 	      (debug:print-info 0 "client:setup server-dat=" server-dat ", remaining-tries=" remaining-tries)
;; 	      (if server-dat
;; 		  (let* ((iface     (tasks:hostinfo-get-interface server-dat))
;; 			 (port      (tasks:hostinfo-get-port      server-dat))
;; 			 (start-res (http-transport:client-connect iface port))
;; 			 ;; (ping-res  (server:ping-server run-id iface port))
;; 			 (ping-res  (rmt:login-no-auto-client-setup start-res run-id)))
;; 		    (if start-res
;; 			(begin
;; 			  (hash-table-set! *runremote* run-id start-res)
;; 			  start-res)
;; 			(if (member remaining-tries '(2 5))
;; 			    (begin    ;; login failed
;; 			      (debug:print 25 "INFO: client:setup start-res=" start-res ", run-id=" run-id ", server-dat=" server-dat)
;; 			      (hash-table-delete! *runremote* run-id)
;; 			      (open-run-close tasks:server-force-clean-run-record
;; 					      tasks:open-db
;; 					      run-id 
;; 					      (tasks:hostinfo-get-interface server-dat)
;; 					      (tasks:hostinfo-get-port      server-dat)
;; 					      " client:setup (server-dat = #t)")
;; 			      (thread-sleep! 2)
;; 			      (server:try-running run-id)
;; 			      (thread-sleep! 10) ;; give server a little time to start up
;; 			      (client:setup run-id remaining-tries: 10)) ;; (- remaining-tries 1)))
;; 			    (begin
;; 			      (debug:print 25 "INFO: client:setup start-res=" start-res ", run-id=" run-id ", server-dat=" server-dat)
;; 			      (thread-sleep! 5)
;; 			      (client:setup run-id remaining-tries: (- remaining-tries 1))))))
;; 		  (begin    ;; no server registered
;; 		    (if (eq? remaining-tries 2)
;; 			(begin
;; 			  ;; (open-run-close tasks:server-clean-out-old-records-for-run-id tasks:open-db run-id " client:setup (server-dat=#f)")
;; 			  (client:setup run-id remaining-tries: 10))
;; 			(begin
;; 			  (thread-sleep! 2) 
;; 			  (debug:print 25 "INFO: client:setup start-res (not defined here), run-id=" run-id ", server-dat=" server-dat)
;; 			  (if (< (open-run-close tasks:num-in-available-state tasks:open-db run-id) 3)
;; 			      (begin
;; 				;; (open-run-close tasks:server-clean-out-old-records-for-run-id tasks:open-db run-id " client:setup (server-dat=#f)")
;; 				(server:try-running run-id)))
;; 			  (thread-sleep! 10) ;; give server a little time to start up
;; 			  (client:setup run-id remaining-tries: (- remaining-tries 1)))))))))))

;; Do all the connection work, look up the transport type and set up the
;; connection if required.
;;
;; There are two scenarios. 
;;   1. We are a test manager and we received *transport-type* and *runremote* via cmdline
;;   2. We are a run tests, list runs or other interactive process and we must figure out
;;      *transport-type* and *runremote* from the monitor.db
;;
;; client:setup
;;
;; lookup_server, need to remove *runremote* stuff
;;
(define (client:setup-http run-id #!key (remaining-tries 10) (failed-connects 0))
  (debug:print 0 "INFO: client:setup remaining-tries=" remaining-tries)
  (if (<= remaining-tries 0)
      (begin
	(debug:print 0 "ERROR: failed to start or connect to server for run-id " run-id)
	(exit 1))
      (let ((host-info (hash-table-ref/default *runremote* run-id #f)))
	(debug:print-info 0 "client:setup host-info=" host-info ", remaining-tries=" remaining-tries)
	(if host-info
	    (let* ((iface     (car  host-info))
		   (port      (cadr host-info))
		   (start-res (client:connect iface port))
		   ;; (ping-res  (server:ping-server run-id iface port))
		   (ping-res  (client:login-no-auto-setup start-res run-id)))
	      (if ping-res   ;; sucessful login?
		  (begin
		    (hash-table-set! *runremote* run-id start-res)
		    start-res)  ;; return the server info
		  (if (member remaining-tries '(3 4 6))
		      (begin    ;; login failed
			(debug:print 25 "INFO: client:setup start-res=" start-res ", run-id=" run-id ", server-dat=" host-info)

(define *passnum*           0) ;; when running track calls to run-tests or similar

;; DATABASE
(define *open-dbs* (vector #f (make-hash-table))) ;; megatestdb run-id-dbs

;; SERVER
(define *my-client-signature* #f)
(define *transport-type*    #f)
(define *megatest-db*       #f)
(define *rpc:listener*      #f) ;; if set up for server communication this will hold the tcp port
(define *runremote*         (make-hash-table)) ;; if set up for server communication this will hold <host port>
(define *last-db-access*    (current-seconds))  ;; update when db is accessed via server
(define *max-cache-size*    0)
(define *logged-in-clients* (make-hash-table))
(define *client-non-blocking-mode* #f)

;; Copyright 2006-2012, 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.

(require-extension (srfi 18) extras tcp s11n)

(use sqlite3 srfi-1 posix regex regex-case srfi-69 hostinfo md5 message-digest)
(import (prefix sqlite3 sqlite3:))

(use spiffy uri-common intarweb http-client spiffy-request-vars)

(tcp-buffer-size 2048)

(declare (unit fs-transport))

(declare (uses common))
(declare (uses db))
(declare (uses tests))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.

(include "common_records.scm")
(include "db_records.scm")


;;======================================================================
;; F S   T R A N S P O R T   S E R V E R
;;======================================================================

;; There is no "server" per se but a convience routine to make it non
;; necessary to be reopening the db over and over again.
;;

(define (fs:process-queue-item packet)
  (if (not *megatest-db*) ;; we will require that (setup-for-run) has already been called
      (set! *megatest-db* (open-db)))
  (debug:print-info 11 "fs:process-queue-item called with packet=" packet)
  (db:process-queue-item *megatest-db* packet))
      

				  ((equal? (uri-path (request-uri (current-request)))
					   '(/ "api"))
				   (send-response body:    (api:process-request db $) ;; the $ is the request vars proc
						  headers: '((content-type text/plain)))
				   (mutex-lock! *heartbeat-mutex*)
				   (set! *last-db-access* (current-seconds))
				   (mutex-unlock! *heartbeat-mutex*))





















				  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ ""))
				   (send-response body: (http-transport:main-page)))
				  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ "runs"))
				   (send-response body: (http-transport:main-page)))
				  ((equal? (uri-path (request-uri (current-request))) 

			       (* 60 60 (string->number tmo))
			       ;; (* 3 24 60 60) ;; default to three days
			       ;; (* 60 1)         ;; default to one minute
			       (* 60 60 25)      ;; default to 25 hours
			       ))))
    (let loop ((count         0)
	       (server-state 'available))


      ;; Use this opportunity to sync the inmemdb to db
      (let ((start-time (current-milliseconds))
	    (sync-time  #f)
	    (rem-time   #f))

	(if *inmemdb* (db:sync-touched *inmemdb* force-sync: #t))
	(set! sync-time  (- (current-milliseconds) start-time))

	  ;; Database connection
	  (set! *inmemdb*  (db:setup run-id))
	  (thread-start! th2)
	  (thread-start! th3)
	  (set! *didsomething* #t)
	  (thread-join! th2)
	  (exit)))))

(define (http:ping run-id host-port)
  (let* ((server-dat (http-transport:client-connect (car host-port)(cadr host-port)))
	 (login-res  (rmt:login-no-auto-client-setup server-dat run-id)))
    (if (and (list? login-res)
	     (car login-res))
	(begin
	  (print "LOGIN_OK")
	  (exit 0))
	(begin
	  (print "LOGIN_FAILED")
	  (exit 1)))))

(define (http-transport:server-signal-handler signum)
  (handle-exceptions
   exn
   (debug:print " ... exiting ...")
   (let ((th1 (make-thread (lambda ()
			     (thread-sleep! 1))

;; Copyright 2006-2012, 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.

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

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

;; (use zmq)

(declare (uses common))
(declare (uses megatest-version))
(declare (uses margs))
(declare (uses runs))
(declare (uses launch))
(declare (uses server))
(declare (uses client))
(declare (uses tests))
(declare (uses genexample))
(declare (uses daemon))
(declare (uses db))


(declare (uses tdb))
(declare (uses mt))
(declare (uses api))
(declare (uses tasks)) ;; only used for debugging.

(define *db* #f) ;; this is only for the repl, do not use in general!!!!

  -cleanup-db             : remove any orphan records, vacuum the db
  -update-meta            : update the tests metadata for all tests
  -env2file fname         : write the environment to fname.csh and fname.sh
  -setvars VAR1=val1,VAR2=val2 : Add environment variables to a run NB// these are
                                 overwritten by values set in config files.
  -server -|hostname      : start the server (reduces contention on megatest.db), use
                            - to automatically figure out hostname
  -transport http|zmq     : use http or zmq for transport (default is http) 
  -daemonize              : fork into background and disconnect from stdin/out
  -list-servers           : list the servers 
  -stop-server id         : stop server specified by id (see output of -list-servers), use
                            0 to kill all
  -repl                   : start a repl (useful for extending megatest)
  -load file.scm          : load and run file.scm
  -mark-incompletes       : find and mark incomplete tests

			":expected"
			":tol"
			":units"
			;; misc
			"-start-dir"
			"-server"
			"-stop-server"
			"-transport"
			"-kill-server"
			"-port"
			"-extract-ods"
			"-pathmod"
			"-env2file"
			"-setvars"
			"-set-state-status"
			"-set-run-status"

(if (args:get-arg "-ping")
    (let* ((run-id    (string->number (args:get-arg "-run-id")))
	   (host-port (let ((slst (string-split   (args:get-arg "-ping") ":")))
			(if (eq? (length slst) 2)
			    (list (car slst)(string->number (cadr slst)))
			    #f)))
	   (toppath   (setup-for-run)))
      (set! *did-something* #t)
      (if (not run-id)
	  (begin
	    (debug:print 0 "ERROR: must specify run-id when doing ping, -run-id n")
	    (print "ERROR: No run-id")
	    (exit 1))
	  (if (not host-port)
	      (begin
		(debug:print 0 "ERROR: argument to -ping is host:port, got " (args:get-arg "-ping"))
		(print "ERROR: bad host:port")
		(exit 1))
	      (case (server:get-transport)
		((http)(http:ping run-id host-port))
		((rpc)  ((rpc:procedure 'server:login (car host-port)(cadr host-port)) *toppath*)) ;; (rpc-transport:ping  run-id (car host-port)(cadr host-port)))


		(else  (debug:print 0 "ERROR: No transport set")(exit)))))))





;;======================================================================
;; Start the server - can be done in conjunction with -runall or -runtests (one day...)
;;   we start the server if not running else start the client thread
;;======================================================================

(if (args:get-arg "-server")

    ;;  Setup client for all expect listed here
    (if (null? (lset-intersection 
		     equal?
		     (hash-table-keys args:arg-hash)
		     '("-list-servers"
		       "-stop-server"
		       "-show-cmdinfo"
		       "-list-runs"
		       "-ping")))
	(if (setup-for-run)
	    (let ((run-id    (and (args:get-arg "-run-id")
				  (string->number (args:get-arg "-run-id")))))
	      ;; (set! *fdb*   (filedb:open-db (conc *toppath* "/db/paths.db")))
	      ;; if not list or kill then start a client (if appropriate)
	      (if (or (args-defined? "-h" "-version" "-gen-megatest-area" "-gen-megatest-test")
		      (eq? (length (hash-table-keys args:arg-hash)) 0))

;; Get test paths matching target, runname, and testpatt
(if (or (args:get-arg "-test-files")(args:get-arg "-test-paths"))
    ;; if we are in a test use the MT_CMDINFO data
    (if (getenv "MT_CMDINFO")
	(let* ((startingdir (current-directory))
	       (cmdinfo   (read (open-input-string (base64:base64-decode (getenv "MT_CMDINFO")))))
	       ;; (runremote (assoc/default 'runremote cmdinfo))
	       (transport (assoc/default 'transport cmdinfo))
	       (testpath  (assoc/default 'testpath  cmdinfo))
	       (test-name (assoc/default 'test-name cmdinfo))
	       (runscript (assoc/default 'runscript cmdinfo))
	       (db-host   (assoc/default 'db-host   cmdinfo))
	       (run-id    (assoc/default 'run-id    cmdinfo))
	       (itemdat   (assoc/default 'itemdat   cmdinfo))
	       (state     (args:get-arg ":state"))

;; Archive tests matching target, runname, and testpatt
(if (args:get-arg "-archive")
    ;; if we are in a test use the MT_CMDINFO data
    (if (getenv "MT_CMDINFO")
	(let* ((startingdir (current-directory))
	       (cmdinfo   (read (open-input-string (base64:base64-decode (getenv "MT_CMDINFO")))))
	       ;; (runremote (assoc/default 'runremote cmdinfo))
	       (transport (assoc/default 'transport cmdinfo))
	       (testpath  (assoc/default 'testpath  cmdinfo))
	       (test-name (assoc/default 'test-name cmdinfo))
	       (runscript (assoc/default 'runscript cmdinfo))
	       (db-host   (assoc/default 'db-host   cmdinfo))
	       (run-id    (assoc/default 'run-id    cmdinfo))
	       (itemdat   (assoc/default 'itemdat   cmdinfo))
	       (state     (args:get-arg ":state"))

(define (megatest:step step state status logfile msg)
  (if (not (getenv "MT_CMDINFO"))
      (begin
	(debug:print 0 "ERROR: MT_CMDINFO env var not set, -step must be called *inside* a megatest invoked environment!")
	(exit 5))
      (let* ((cmdinfo   (read (open-input-string (base64:base64-decode (getenv "MT_CMDINFO")))))
	     ;; (runremote (assoc/default 'runremote cmdinfo))
	     (transport (assoc/default 'transport cmdinfo))
	     (testpath  (assoc/default 'testpath  cmdinfo))
	     (test-name (assoc/default 'test-name cmdinfo))
	     (runscript (assoc/default 'runscript cmdinfo))
	     (db-host   (assoc/default 'db-host   cmdinfo))
	     (run-id    (assoc/default 'run-id    cmdinfo))
	     (test-id   (assoc/default 'test-id   cmdinfo))
	     (itemdat   (assoc/default 'itemdat   cmdinfo))

    (if (not (getenv "MT_CMDINFO"))
	(begin
	  (debug:print 0 "ERROR: MT_CMDINFO env var not set, commands -test-status, -runstep and -setlog must be called *inside* a megatest environment!")
	  (exit 5))
	(let* ((startingdir (current-directory))
	       (cmdinfo   (read (open-input-string (base64:base64-decode (getenv "MT_CMDINFO")))))
	       ;; (runremote (assoc/default 'runremote cmdinfo))
	       (transport (assoc/default 'transport cmdinfo))
	       (testpath  (assoc/default 'testpath  cmdinfo))
	       (test-name (assoc/default 'test-name cmdinfo))
	       (runscript (assoc/default 'runscript cmdinfo))
	       (db-host   (assoc/default 'db-host   cmdinfo))
	       (run-id    (assoc/default 'run-id    cmdinfo))
	       (test-id   (assoc/default 'test-id   cmdinfo))
	       (itemdat   (assoc/default 'itemdat   cmdinfo))

;; Exit and clean up
;;======================================================================

(if *runremote* (close-all-connections!))

(if (not *didsomething*)
    (debug:print 0 help))

;; (if *runremote* (rpc:close-all-connections!))

(if (not (eq? *globalexitstatus* 0))
    (if (or (args:get-arg "-runtests")(args:get-arg "-runall"))
        (begin
           (debug:print 0 "NOTE: Subprocesses with non-zero exit code detected: " *globalexitstatus*)
           (exit 0))
        (case *globalexitstatus*
         ((0)(exit 0))
         ((1)(exit 1))
         ((2)(exit 2))
         (else (exit 3)))))

;; )


;;======================================================================
;;  S U P P O R T   F U N C T I O N S
;;======================================================================

(define (rmt:call-transport run-id connection-info cmd jparams)
  (case (server:get-transport)
    ((rpc)  ( rpc-transport:client-api-send-receive run-id connection-info cmd jparams))
    ((http) (http-transport:client-api-send-receive run-id connection-info cmd jparams))
    ((fs)   ( fs-transport:client-api-send-receive run-id connection-info cmd jparams))
    ((zmq)  (zmq-transport:client-api-send-receive run-id connection-info cmd jparams))
    (else   ( rpc-transport:client-api-send-receive run-id connection-info cmd jparams))))

;; cmd is a symbol
;; vars is a json string encoding the parameters for the call
;;
(define (rmt:send-receive cmd rid params)
  (let* ((run-id  (if rid rid 0))
	 (connection-info (let ((cinfo (hash-table-ref/default *runremote* run-id #f)))
			    (if cinfo
				cinfo
				(let loop ((numtries 100))
				  (let ((res (client:setup run-id)))
				    (if res 
					(hash-table-ref/default *runremote* run-id #f) ;; client:setup filled this in (hopefully)
					(if (> numtries 0)
					    (begin
					      (thread-sleep! 10)
					      (loop (- numtries 1)))
					    (begin
					      (debug:print 0 "ERROR: 100 tries and no server, giving up")
					      (exit 1)))))))))
	 (jparams         (db:obj->string params))
	 (res             (rmt:call-transport connection-info cmd jparams)))
    (if res
	(db:string->obj res) ;; (rmt:json-str->dat res)
	(let ((new-connection-info (client:setup run-id)))
	  (debug:print 0 "WARNING: Communication failed, trying call to http-transport:client-api-send-receive again.")
	  (rmt:send-receive cmd run-id params)))))

(define (rmt:send-receive-no-auto-client-setup connection-info cmd run-id params)

;; Copyright 2006-2012, 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.

(require-extension (srfi 18) extras tcp s11n rpc)
(import (prefix rpc rpc:))

(use sqlite3 srfi-1 posix regex regex-case srfi-69 hostinfo md5 message-digest)
(import (prefix sqlite3 sqlite3:))

(declare (unit rpc-transport))

(declare (uses common))
(declare (uses db))
(declare (uses tests))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.

(include "common_records.scm")
(include "db_records.scm")

;; procstr is the name of the procedure to be called as a string
(define (rpc-transport:autoremote procstr params)
  (handle-exceptions
   exn
   (begin
     (debug:print 1 "Remote failed for " proc " " params)
     (apply (eval (string->symbol procstr)) params))
   ;; (if *runremote*
   ;;    (apply (eval (string->symbol (conc "remote:" procstr))) params)
   (apply (eval (string->symbol procstr)) params)))

;; all routes though here end in exit ...
;;
;; start_server? 
;;
(define (rpc-transport:launch run-id)
  (set! *run-id*   run-id)
  (if (args:get-arg "-daemonize")
      (daemon:ize))
  (if (server:check-if-running run-id)
      (begin
	(debug:print 0 "INFO: Server for run-id " run-id " already running")
	(exit 0)))
  (let loop ((server-id (open-run-close tasks:server-lock-slot tasks:open-db run-id))
	     (remtries  4))
    (if (not server-id)
	(if (> remtries 0)
	    (begin
	      (thread-sleep! 2)
	      (loop (open-run-close tasks:server-lock-slot tasks:open-db run-id)
		    (- remtries 1)))
	    (begin
	      ;; since we didn't get the server lock we are going to clean up and bail out
	      (debug:print-info 2 "INFO: server pid=" (current-process-id) ", hostname=" (get-host-name) " not starting due to other candidates ahead in start queue")
	      (open-run-close tasks:server-delete-records-for-this-pid tasks:open-db " rpc-transport:launch")
	      ))
	(let* ((th2 (rpc-transport:run 
		     (if (args:get-arg "-server")
			 (args:get-arg "-server")
			 "-")
		     run-id
		     server-id))
	       (th3 (make-thread (lambda ()
				   (rpc-transport:keep-running run-id server-id))
				 "Keep running")))
	  ;; Database connection
	  (set! *inmemdb*  (db:setup run-id))
	  (thread-start! th2)
	  (thread-start! th3)
	  (set! *didsomething* #t)
	  (thread-join! th3)
	  (exit)))))

(define (rpc-transport:run hostn run-id server-id)
  (debug:print 2 "Attempting to start the rpc server ...")
  (let* ((db              #f)
	 (hostname        (get-host-name))
	 (ipaddrstr       (let ((ipstr (if (string=? "-" hostn)
					   ;; (string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
					   (server:get-best-guess-address hostname)
					   #f)))
			    (if ipstr ipstr hostn))) ;; hostname))) 
	 (start-port      (open-run-close tasks:server-get-next-port tasks:open-db))
	 (link-tree-path  (configf:lookup *configdat* "setup" "linktree"))
	 (rpc:listener    (rpc-transport:find-free-port-and-open (rpc:default-server-port)))
	 (th1             (make-thread
			   (cute (rpc:make-server rpc:listener) "rpc:server")
			   'rpc:server))
	 (hostname        (if (string=? "-" hostn)
			      (get-host-name) 
			      hostn))
	 (ipaddrstr       (if (string=? "-" hostn)
			      (server:get-best-guess-address hostname) ;; (string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
			      #f))
	 (portnum         (rpc:default-server-port))
	 (host:port       (conc (if ipaddrstr ipaddrstr hostname) ":" portnum))
	 (tdb             (tasks:open-db)))
    (set! db *inmemdb*)
    (open-run-close tasks:server-set-interface-port 
		    tasks:open-db 
		    server-id 
		    ipaddrstr portnum)
    (debug:print 0 "Server started on " host:port)
    
    (trace rpc:publish-procedure!)
    (rpc:publish-procedure! 'server:login server:login)

    ;;======================================================================
    ;;	  ;; end of publish-procedure section
    ;;======================================================================
    ;;
    (on-exit (lambda ()
	       (open-run-close tasks:server-set-state! tasks:open-db server-id "stopped")))

    (set! *rpc:listener* rpc:listener)
    (tasks:server-set-state! tdb server-id "running")
    th1
    ))

(define (rpc-transport:keep-running run-id server-id)
  ;; if none running or if > 20 seconds since 
  ;; server last used then start shutdown
  (let loop ((count 0))
    (thread-sleep! 5) ;; no need to do this very often
    (let ((numrunning -1)) ;; (db:get-count-tests-running db)))
      (if (or (> numrunning 0)
	      (> (+ *last-db-access* 60)(current-seconds)))
	  (begin
	    (debug:print-info 0 "Server continuing, tests running: " numrunning ", seconds since last db access: " (- (current-seconds) *last-db-access*))
	    (loop (+ 1 count)))
	  (begin
	    (debug:print-info 0 "Starting to shutdown the server side")
	    (open-run-close tasks:server-delete-record tasks:open-db server-id " rpc-transport:try-start-server stop")
	    (thread-sleep! 10)
	    (debug:print-info 0 "Max cached queries was " *max-cache-size*)
	    (debug:print-info 0 "Server shutdown complete. Exiting")
	    )))))

(define (rpc-transport:find-free-port-and-open port)
  (handle-exceptions
   exn
	  (begin
     (print "Failed to bind to port " (rpc:default-server-port) ", trying next port")
     (rpc-transport:find-free-port-and-open (+ port 1)))
   (rpc:default-server-port port)
   (tcp-read-timeout 240000)
   (tcp-listen (rpc:default-server-port) 10000)))

(define (rpc-transport:ping run-id host port)
  (handle-exceptions
   exn
   (begin
     (print "SERVER_NOT_FOUND")
     (exit 1))
   (let ((login-res ((rpc:procedure 'server:login host port) *toppath*)))
     (if (and (list? login-res)
	      (car login-res))
	 (begin
	   (print "LOGIN_OK")
	   (exit 0))
	 (begin
	   (print "LOGIN_FAILED")
	   (exit 1))))))

(define (rpc-transport:client-setup run-id #!key (remtries 10))
  (if *runremote*
      (begin
	(debug:print 0 "ERROR: Attempt to connect to server but already connected")
	#f)
      (let* ((host-info (hash-table-ref/default *runremote* run-id #f))) ;; (open-run-close db:get-var #f "SERVER"))
	(if host-info
	    (let ((iface    (car host-info))
		  (port     (cadr host-info))
		  (ping-res ((rpc:procedure 'server:login host port) *toppath*)))
	      (if ping-res
		  (let ((server-dat (list iface port #f #f #f)))
		    (hash-table-set! *runremote* run-id server-dat)
		    server-dat)
		  (begin
		    (server:try-running run-id)
		    (thread-sleep! 2)
		    (rpc-transport:client-setup run-id (- remtries 1)))))
 	    (let* ((server-db-info (open-run-close tasks:get-server tasks:open-db run-id)))
 	      (debug:print-info 0 "client:setup server-dat=" server-dat ", remaining-tries=" remaining-tries)
	      (if server-db-info
 		  (let* ((iface     (tasks:hostinfo-get-interface server-db-info))
 			 (port      (tasks:hostinfo-get-port      server-db-info))
			 (server-dat (list iface port #f #f #f))
 			 (ping-res  ((rpc:procedure 'server:login host port) *toppath*)))
 		    (if start-res
 			(begin
 			  (hash-table-set! *runremote* run-id server-dat)
			  server-dat)
			(begin
			  (server:try-running run-id)
			  (thread-sleep! 2)
			  (rpc-transport:client-setup run-id (- remtries 1)))))
		  (begin
		    (server:try-running run-id)
		    (thread-sleep! 2)
		    (rpc-transport:client-setup run-id (- remtries 1)))))))))
;; 
;; 	     (port     (if (and hostinfo (> (length hostdat) 1))(cadr hostdat) #f)))
;; 	(if (and port
;; 		 (string->number port))
;; 	    (let ((portn (string->number port)))
;; 	      (debug:print-info 2 "Setting up to connect to host " host ":" port)
;; 	      (handle-exceptions
;; 	       exn
;; 	       (begin
;; 		 (debug:print 0 "ERROR: Failed to open a connection to the server at host: " host " port: " port)
;; 		 (debug:print 0 "   EXCEPTION: " ((condition-property-accessor 'exn 'message) exn))
;; 		 ;; (open-run-close 
;; 		 ;;  (lambda (db . param) 
;; 		 ;;    (sqlite3:execute db "DELETE FROM metadat WHERE var='SERVER'"))
;; 		 ;;  #f)
;; 		 (set! *runremote* #f))
;; 	       (if (and (not (args:get-arg "-server")) ;; no point in the server using the server using the server
;; 			((rpc:procedure 'server:login host portn) *toppath*))
;; 		   (begin
;; 		     (debug:print-info 2 "Logged in and connected to " host ":" port)
;; 		     (set! *runremote* (vector host portn)))
;; 		   (begin
;; 		     (debug:print-info 2 "Failed to login or connect to " host ":" port)
;; 		     (set! *runremote* #f)))))
;; 	    (debug:print-info 2 "no server available")))))

(declare (unit server))

(declare (uses common))
(declare (uses db))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.
(declare (uses synchash))
(declare (uses http-transport))
(declare (uses rpc-transport))
(declare (uses daemon))

(include "common_records.scm")
(include "db_records.scm")

(define (server:make-server-url hostport)
  (if (not hostport)

;;

;; all routes though here end in exit ...
;;
;; start_server
;;
(define (server:launch run-id)
  (let ((transport (server:get-transport)))
    (case transport
      ((http) (http-transport:launch run-id))
      ((rpc)  (rpc-transport:launch run-id))


      (else   (debug:print 0 "ERROR: No known transport set, transport=" transport ", using rpc")
	      (rpc-transport:launch run-id)))))



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

;; Get the transport
(define (server:get-transport)
  (if *transport-type*
      *transport-type*
      (let ((ttype (string->symbol
		    (or (args:get-arg "-transport")
			(configf:lookup *configdat* "server" "transport")
			"rpc"))))
	(set! *transport-type* ttype)
	ttype)))
	    
;; Generate a unique signature for this server
(define (server:mk-signature)
  (message-digest-string (md5-primitive) 
			 (with-output-to-string
			   (lambda ()
			     (write (list (current-directory)
					  (argv)))))))


;; When using zmq this would send the message back (two step process)
;; with spiffy or rpc this simply returns the return data to be returned
;; 
(define (server:reply return-addr query-sig success/fail result)
  (debug:print-info 11 "server:reply return-addr=" return-addr ", result=" result)
  ;; (send-message pubsock target send-more: #t)
  ;; (send-message pubsock 
  (case (server:get-transport)
    ((rpc)  (db:obj->string (vector success/fail query-sig result)))
    ((http) (db:obj->string (vector success/fail query-sig result)))
    ((zmq)
     (let ((pub-socket (vector-ref *runremote* 1)))
       (send-message pub-socket return-addr send-more: #t)
       (send-message pub-socket (db:obj->string (vector success/fail query-sig result)))))
    ((fs)   result)
    (else 
     (debug:print 0 "ERROR: unrecognised transport type: " *transport-type*)
     result)))

;; Given a run id start a server process    ### NOTE ### > file 2>&1 
;; if the run-id is zero and the target-host is set 
;; try running on that host
;;
(define  (server:run run-id)
  (let* ((target-host (configf:lookup *configdat* "server" "homehost" ))
	 (cmdln (conc (common:get-megatest-exe)
		      " -server - -run-id " run-id " >> " *toppath* "/db/" run-id ".log 2>&1 &")))
    (debug:print 0 "INFO: Starting server (" cmdln ") as none running ...")
    (push-directory *toppath*)
    (if target-host
	(begin
	  (set-environment-variable "TARGETHOST" target-host)
	  (system (conc "nbfake " cmdln)))
	(system cmdln))
    (pop-directory)))

(define (server:get-client-signature)
  (if *my-client-signature* *my-client-signature*
      (let ((sig (server:mk-signature)))
	(set! *my-client-signature* sig)
	*my-client-signature*)))

;; kind start up of servers, wait 40 seconds before allowing another server for a given
;; run-id to be launched
(define (server:kind-run run-id)
  (let ((last-run-time (hash-table-ref/default *server-kind-run* run-id #f)))
    (if (or (not last-run-time)
	    (> (- (current-seconds) last-run-time) 40))

		(res "NOREPLY"))
       (if (eof-object? inl)
	   (case (string->symbol res)
	     ((NOREPLY)  #f)
	     ((LOGIN_OK) #t)
	     (else       #f))
	   (loop (read-line) inl))))))

(define (server:login toppath)
  (lambda (toppath)
    (set! *last-db-access* (current-seconds))
    (if (equal? *toppath* toppath)
	(begin
	  ;; (debug:print-info 2 "login successful")
	  #t)
	(begin
	  ;; (debug:print-info 2 "login failed")
	  #f))))

	
;; register that this server may come online (first to register goes though with the process)
(define (tasks:server-set-available mdb run-id)
  (sqlite3:execute 
   mdb 
   "INSERT INTO servers (pid,hostname,port,pubport,start_time,      priority,state,mt_version,heartbeat,   interface,transport,run_id)
                   VALUES(?, ?,       ?,   ?, strftime('%s','now'), ?,       ?,    ?,-1,?,        ?,        ?);"
   (current-process-id)          ;; pid
   (get-host-name)               ;; hostname
   -1                            ;; port
   -1                            ;; pubport
   (random 1000)                 ;; priority (used a tiebreaker on get-available)
   "available"                   ;; state
   (common:version-signature)    ;; mt_version
   -1                            ;; interface
   (conc (server:get-transport)) ;; transport
   run-id
   ))

(define (tasks:num-in-available-state mdb run-id)
  (let ((res 0))
    (sqlite3:for-each-row
     (lambda (num-in-queue)

;;;; client.scm
(use rpc posix)

(define call (rpc:procedure 'foo "localhost"))

(do ((i 10 (sub1 i)))
    ((zero? i))
  (print "-> " (call (random 100))))

;;;; server.scm
(use rpc)

(rpc:publish-procedure!
 'foo
 (lambda (x)
   (print "foo: " x)
   #f))

(rpc:publish-procedure!
 'fini
 (lambda () (print "fini") (thread-start! (lambda () (thread-sleep! 3) (print "terminate") (exit))) #f))

((rpc:make-server (tcp-listen (rpc:default-server-port))) #t)

# XTERM   [system xterm]
# RUNDEAD [system exit 56]

[server]

# If the server can't be started on this port it will try the next port until
# it succeeds
port 9080

# This server will keep running this number of hours after last access. 
# Three minutes is 0.05 hours
# timeout 0.025
timeout 0.25

## disks are:

;; Copyright 2006-2012, 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.

(require-extension (srfi 18) extras tcp s11n)

(use sqlite3 srfi-1 posix regex regex-case srfi-69 hostinfo md5 message-digest)
(import (prefix sqlite3 sqlite3:))

(use zmq)

(declare (unit zmq-transport))

(declare (uses common))
(declare (uses db))
(declare (uses tests))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.
(declare (uses server))

(include "common_records.scm")
(include "db_records.scm")

;; Transition to pub --> sub with pull <-- push
;;
;;   1. client sends request to server via push to the pull port
;;   2. server puts request in queue or processes immediately as appropriate
;;   3. server puts responses from completed requests into pub port 
;;
;; TODO
;;
;; Done Tested
;; [x]  [ ]    1. Add columns pullport pubport to servers table
;; [x]  [ ]    2. Add rm of monitor.db if older than 11/12/2012 
;; [x]  [ ]    3. Add create of pullport and pubport with finding of available ports
;; [x]  [ ]    4. Add client compose of request
;; [x]  [ ]        - name of client: testname/itempath-test_id-hostname 
;; [x]  [ ]        - name of request: callname, params
;; [x]  [ ]        - request key: f(clientname, callname, params)
;; [x]  [ ]    5. Add processing of subscription hits
;; [x]  [ ]        - done when get key 
;; [x]  [ ]        - return results
;; [x]  [ ]    6. Add timeout processing
;; [x]  [ ]        - after 60 seconds
;; [ ]  [ ]            i. check server alive, connect to new if necessary
;; [ ]  [ ]           ii. resend request
;; [ ]  [ ]    7. Turn self ping back on

(define (zmq-transport:make-server-url hostport)
  (if (not hostport)
      #f
      (conc "tcp://" (car hostport) ":" (cadr hostport))))

(define  *server-loop-heart-beat* (current-seconds))
(define *heartbeat-mutex* (make-mutex))

;;======================================================================
;; S E R V E R
;;======================================================================

(define-inline (zmqsock:get-pub  dat)(vector-ref dat 0))
(define-inline (zmqsock:get-pull dat)(vector-ref dat 1))
(define-inline (zmqsock:set-pub! dat s)(vector-set! dat s 0))
(define-inline (zmqsock:set-pull! dat s)(vector-set! dat s 0))

(define (zmq-transport:run hostn)
  (debug:print 2 "Attempting to start the server ...")
  (if (not *toppath*)
      (if (not (setup-for-run))
	  (begin
	    (debug:print 0 "ERROR: cannot find megatest.config, cannot start server, exiting")
	    (exit))))
  (let* ((db              (open-db)) ;; here we *do not* want to be opening and closing the db
	 (zmq-sdat1       #f)
	 (zmq-sdat2       #f)
	 (pull-socket     #f)
	 (pub-socket      #f)
	 (p1              #f)
	 (p2              #f)
	 (zmq-sockets-dat #f)
	 (iface           (if (string=? "-" hostn)
			      "*" ;; (get-host-name) 
			      hostn))
	 (hostname        (get-host-name))
	 (ipaddrstr       (let ((ipstr (if (string=? "-" hostn)
					   (string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
					   #f)))
			    (if ipstr ipstr hostname)))
	 (last-run       0))
    (set! zmq-sockets-dat (zmq-transport:setup-ports ipaddrstr (if (args:get-arg "-port")
			    (string->number (args:get-arg "-port"))
							    (+ 5000 (random 1001)))))

    (set! zmq-sdat1    (car   zmq-sockets-dat))
    (set! pull-socket  (cadr  zmq-sdat1)) ;; (iface s  port)
    (set! p1           (caddr zmq-sdat1))
    
    (set! zmq-sdat2    (cadr  zmq-sockets-dat))
    (set! pub-socket   (cadr  zmq-sdat2))
    (set! p2           (caddr zmq-sdat2))

    (set! *cache-on* #t)

    (set! *runremote* (vector pull-socket pub-socket)) ;; overloading the use of *runremote* BUG!?

    ;; what to do when we quit
    ;;
;;     (on-exit (lambda ()
;; 	       (if (and *toppath* *server-info*)
;; 		   (open-run-close tasks:server-deregister-self tasks:open-db (car *server-info*))
;; 		   (let loop () 
;; 		     (let ((queue-len 0))
;; 		       (thread-sleep! (random 5))
;; 		       (mutex-lock! *incoming-mutex*)
;; 		       (set! queue-len (length *incoming-data*))
;; 		       (mutex-unlock! *incoming-mutex*)
;; 		       (if (> queue-len 0)
;; 			   (begin
;; 			     (debug:print-info 0 "Queue not flushed, waiting ...")
;; 			     (loop))))))))

    ;; The heavy lifting
    ;;
    ;; make-vector-record cdb packet client-sig qtype immediate query-sig params qtime
    ;;
    (debug:print-info 11 "Server setup complete, start listening for messages")
    (let loop ((queue-lst '()))
      (let* ((rawmsg (receive-message* pull-socket))
	     (packet (db:string->obj rawmsg))
	     (qtype  (cdb:packet-get-qtype packet)))
	(debug:print-info 12 "server=> received packet=" packet)
	(if (not (member qtype '(sync ping)))
	    (begin
	      (mutex-lock! *heartbeat-mutex*)
	      (set! *last-db-access* (current-seconds))
	      (mutex-unlock! *heartbeat-mutex*)))
	(if #t ;; (cdb:packet-get-immediate packet) ;; process immediately or put in queue
	    (begin
	      (db:process-queue-item db packet)
	      ;; (open-run-close db:process-queue #f pub-socket (cons packet queue-lst))
	      
	      (loop '()))
	    (loop (cons packet queue-lst)))))))

;; run zmq-transport:keep-running in a parallel thread to monitor that the db is being 
;; used and to shutdown after sometime if it is not.
;;
(define (zmq-transport:keep-running)
  ;; if none running or if > 20 seconds since 
  ;; server last used then start shutdown
  ;; This thread waits for the server to come alive
  (let* ((server-info (let loop ()
			(let ((sdat #f))
			  (mutex-lock! *heartbeat-mutex*)
			  (set! sdat *server-info*)
			  (mutex-unlock! *heartbeat-mutex*)
			  (if sdat sdat
			      (begin
				(debug:print 12 "WARNING: server not started yet, waiting few seconds before trying again")
				(sleep 4)
				(loop))))))
	 (iface       (cadr server-info))
	 (pullport    (caddr server-info))
	 (pubport     (cadddr server-info)) ;; id interface pullport pubport)
	 ;; (zmq-sockets (zmq-transport:client-connect iface pullport pubport))
	 (last-access 0))
    (debug:print-info 11 "heartbeat started for zmq server on " iface " " pullport " " pubport)
    (let loop ((count 0))
      (thread-sleep! 4) ;; no need to do this very often
      ;; NB// sync currently does NOT return queue-length
      ;; GET REAL QUEUE LENGTH FROM THE VARIABLE
      (let ((queue-len 0)) ;; FOR NOW DO NOT DO THIS (cdb:client-call zmq-sockets 'sync #t 1)))
      ;; (print "Server running, count is " count)
	(if (< count 1) ;; 3x3 = 9 secs aprox
	    (loop (+ count 1)))

	;; NOTE: Get rid of this mechanism! It really is not needed...
	(open-run-close tasks:server-update-heartbeat tasks:open-db (car server-info))

	;; (if ;; (or (> numrunning 0) ;; stay alive for two days after last access
	(mutex-lock! *heartbeat-mutex*)
	(set! last-access *last-db-access*)
	(mutex-unlock! *heartbeat-mutex*)
	(if (> (+ last-access
		  ;; (* 50 60 60)    ;; 48 hrs
		  ;; 60              ;; one minute
		  ;; (* 60 60)       ;; one hour
		  (* 45 60)          ;; 45 minutes, until the db deletion bug is fixed.
		  )
	       (current-seconds))
	    (begin
	      (debug:print-info 2 "Server continuing, seconds since last db access: " (- (current-seconds) last-access))
	      (loop 0))
	    (begin
	      (debug:print-info 0 "Starting to shutdown the server.")
	      ;; need to delete only *my* server entry (future use)
	      (set! *time-to-exit* #t)
	      (open-run-close tasks:server-deregister-self tasks:open-db (get-host-name))
	      (thread-sleep! 1)
	      (debug:print-info 0 "Max cached queries was " *max-cache-size*)
	      (debug:print-info 0 "Server shutdown complete. Exiting")
	      (exit)))))))

(define (zmq-transport:find-free-port-and-open iface s port stype #!key (trynum 50))
  (let ((s (if s s (make-socket stype)))
        (p (if (number? port) port 5555))
        (old-handler (current-exception-handler)))
    (handle-exceptions
     exn
     (begin
       (debug:print 0 "Failed to bind to port " p ", trying next port")
       (debug:print 0 "   EXCEPTION: " ((condition-property-accessor 'exn 'message) exn))
       ;; (old-handler)
       ;; (print-call-chain)
       (if (> trynum 0)
           (zmq-transport:find-free-port-and-open iface s (+ p 1) trynum: (- trynum 1))
           (debug:print-info 0 "Tried ports up to " p 
                             " but all were in use. Please try a different port range by starting the server with parameter \" -port N\" where N is the starting port number to use"))
       (exit)) ;; To exit or not? That is the question.
     (let ((zmq-url (conc "tcp://" iface ":" p)))
       (debug:print 2 "Trying to start server on " zmq-url)
       (bind-socket s zmq-url)
       (list iface s port)))))

(define (zmq-transport:setup-ports ipaddrstr startport)
  (let* ((s1 (zmq-transport:find-free-port-and-open ipaddrstr #f startport 'pull))
         (p1 (caddr s1))
         (s2 (zmq-transport:find-free-port-and-open ipaddrstr #f (+ 1 (if p1 p1 (+ startport 1))) 'pub))
         (p2 (caddr s2)))
    (set! *runremote* #f)
    (debug:print 0 "Server started on " ipaddrstr " ports " p1 " and " p2)
    (mutex-lock! *heartbeat-mutex*)
    (set! *server-info* (open-run-close tasks:server-register 
					tasks:open-db 
					(current-process-id) 
					ipaddrstr p1 
					0 
					'live
					'zmq
					pubport: p2))
    (debug:print-info 11 "*server-info* set to " *server-info*)
    (mutex-unlock! *heartbeat-mutex*)
    (list s1 s2)))

(define (zmq-transport:mk-signature)
  (message-digest-string (md5-primitive) 
			 (with-output-to-string
			   (lambda ()
			     (write (list (current-directory)
					  (argv)))))))

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

;;======================================================================
;; C L I E N T S
;;======================================================================

;; 
(define (zmq-transport:client-socket-connect iface port #!key (context #f)(type 'req)(subscriptions '()))
  (debug:print-info 3 "client-connect " iface ":" port ", type=" type ", subscriptions=" subscriptions)
  (let ((connect-ok #f)
	(zmq-socket (if context 
			(make-socket type context)
			(make-socket type)))
	(conurl     (zmq-transport:make-server-url (list iface port))))
    (if (socket? zmq-socket)
     (begin
	  ;; first apply subscriptions
	  (for-each (lambda (subscription)
		      (debug:print 2 "Subscribing to " subscription)
		      (socket-option-set! zmq-socket 'subscribe subscription))
		    subscriptions)
	  (connect-socket zmq-socket conurl)
	  zmq-socket)
	(begin
	  (debug:print 0 "ERROR: Failed to open socket to " conurl)
	  #f))))

(define (zmq-transport:client-connect iface pullport pubport)
  (let* ((push-socket (zmq-transport:client-socket-connect iface pullport type: 'push))
	 (sub-socket  (zmq-transport:client-socket-connect iface pubport
						    type: 'sub
						    subscriptions: (list (server:get-client-signature) "all")))
	 (zmq-sockets (vector push-socket sub-socket))
	 (login-res   #f))
    (debug:print-info 11 "zmq-transport:client-connect started. Next is login")
    (set! login-res (server:client-login zmq-sockets))
    (if (and (not (null? login-res))
	     (car login-res))
	(begin
	  (debug:print-info 2 "Logged in and connected to " iface ":" pullport "/" pubport ".")
	  (set! *runremote* zmq-sockets)
	  zmq-sockets)
	(begin
	  (debug:print-info 2 "Failed to login or connect to " conurl)
	  (set! *runremote* #f)
	  #f))))

;; run zmq-transport:keep-running in a parallel thread to monitor that the db is being 
;; used and to shutdown after sometime if it is not.
;;
(define (zmq-transport:keep-running)
  ;; if none running or if > 20 seconds since 
  ;; server last used then start shutdown
  ;; This thread waits for the server to come alive
  (let* ((server-info (let loop ()
                        (let ((sdat #f))
                          (mutex-lock! *heartbeat-mutex*)
                          (set! sdat *runremote*)
                          (mutex-unlock! *heartbeat-mutex*)
                          (if sdat sdat
                              (begin
                                (sleep 4)
                                (loop))))))
         (iface       (car server-info))
         (port        (cadr server-info))
         (last-access 0)
	 (tdb         (tasks:open-db))
	 (spid        (tasks:server-get-server-id tdb #f iface port #f)))
    (print "Keep-running got server pid " spid ", using iface " iface " and port " port)
    (let loop ((count 0))
      (thread-sleep! 4) ;; no need to do this very often
      ;; NB// sync currently does NOT return queue-length
      (let () ;; (queue-len (cdb:client-call server-info 'sync #t 1)))
      ;; (print "Server running, count is " count)
        (if (< count 1) ;; 3x3 = 9 secs aprox
            (loop (+ count 1)))
        
        ;; NOTE: Get rid of this mechanism! It really is not needed...
        (tasks:server-update-heartbeat tdb spid)
      
        ;; (if ;; (or (> numrunning 0) ;; stay alive for two days after last access
        (mutex-lock! *heartbeat-mutex*)
        (set! last-access *last-db-access*)
        (mutex-unlock! *heartbeat-mutex*)
        (if (> (+ last-access
                  ;; (* 50 60 60)    ;; 48 hrs
                  ;; 60              ;; one minute
                  ;; (* 60 60)       ;; one hour
                  (* 45 60)          ;; 45 minutes, until the db deletion bug is fixed.
                  )
               (current-seconds))
            (begin
              (debug:print-info 2 "Server continuing, seconds since last db access: " (- (current-seconds) last-access))
              (loop 0))
            (begin
              (debug:print-info 0 "Starting to shutdown the server.")
              ;; need to delete only *my* server entry (future use)
              (set! *time-to-exit* #t)
              (tasks:server-deregister-self tdb (get-host-name))
              (thread-sleep! 1)
              (debug:print-info 0 "Max cached queries was " *max-cache-size*)
              (debug:print-info 0 "Server shutdown complete. Exiting")
              (exit)))))))

;; all routes though here end in exit ...
(define (zmq-transport:launch)
  (if (not *toppath*)
      (if (not (setup-for-run))
	  (begin
	    (debug:print 0 "ERROR: cannot find megatest.config, exiting")
	    (exit))))
  (debug:print-info 2 "Starting zmq server")
  (if *toppath* 
      (let* (;; (th1 (make-thread (lambda ()
	     ;;      	       (let ((server-info #f))
	     ;;      		 ;; wait for the server to be online and available
	     ;;      		 (let loop ()
	     ;;			   (debug:print-info 2 "Waiting for the server to come online before starting heartbeat")
	     ;;      		   (thread-sleep! 2)
	     ;;      		   (mutex-lock! *heartbeat-mutex*)
	     ;;      		   (set! server-info *server-info* )
	     ;;      		   (mutex-unlock! *heartbeat-mutex*)
	     ;;      		   (if (not server-info)(loop)))
	     ;;			 (debug:print 2 "Server alive, starting self-ping")
	     ;;      		 (zmq-transport:self-ping server-info)
	     ;;      		 ))
	     ;;      	     "Self ping"))
	     (th2 (make-thread (lambda ()
				 (zmq-transport:run 
				  (if (args:get-arg "-server")
				      (args:get-arg "-server")
				      "-"))) "Server run"))
	     ;; (th3 (make-thread (lambda ()(zmq-transport:keep-running)) "Keep running"))
	     )
	(set! *client-non-blocking-mode* #t)
	;; (thread-start! th1)
	(thread-start! th2)
	;; (thread-start! th3)
	(set! *didsomething* #t)
	;; (thread-join! th3)
	(thread-join! th2)
	)
      (debug:print 0 "ERROR: Failed to setup for megatest")))

(define (zmq-transport:client-signal-handler signum)
  (handle-exceptions
   exn
   (debug:print " ... exiting ...")
   (let ((th1 (make-thread (lambda ()
			     (if (not *received-response*)
				 (receive-message* *runremote*))) ;; flush out last call if applicable
			   "eat response"))
	 (th2 (make-thread (lambda ()
			     (debug:print 0 "ERROR: Received ^C, attempting clean exit. Please be patient and wait a few seconds before hitting ^C again.")
			     (thread-sleep! 3) ;; give the flush three seconds to do it's stuff
			     (debug:print 0 "       Done.")
			     (exit 4))
			   "exit on ^C timer")))
     (thread-start! th2)
     (thread-start! th1)
     (thread-join! th2))))

(define (zmq-transport:client-launch)
  (set-signal-handler! signal/int zmq-transport:client-signal-handler)
   (if (zmq-transport:client-setup)
       (debug:print-info 2 "connected as client")
       (begin
	 (debug:print 0 "ERROR: Failed to connect as client")
	 (exit))))

;;======================================================================
;; Defunct functions
;;======================================================================

;; ping a server and return number of clients or #f (if no response)
;; NOT IN USE!
(define (zmq-transport:ping host port #!key (secs 10)(return-socket #f))
  (cdb:use-non-blocking-mode
   (lambda ()
     (let* ((res #f)
	    (th1 (make-thread
		  (lambda ()
		    (let* ((zmq-context (make-context 1))
			   (zmq-socket  (zmq-transport:client-connect host port context: zmq-context)))
		      (if zmq-socket
			  (if (zmq-transport:client-login zmq-socket)
			      (let ((numclients (cdb:num-clients zmq-socket)))
				(if (not return-socket)
				    (begin
				      (zmq-transport:client-logout zmq-socket)
				      (close-socket  zmq-socket)))
				(set! res (list #t numclients (if return-socket zmq-socket #f))))
			      (begin
				;; (close-socket zmq-socket)
				(set! res (list #f "CAN'T LOGIN" #f))))
			  (set! res (list #f "CAN'T CONNECT" #f)))))
		  "Ping: th1"))
	    (th2 (make-thread
		  (lambda ()
		    (let loop ((count 1))
		      (debug:print-info 1 "Ping " count " server on " host " at port " port)
		      (thread-sleep! 2)
		      (if (< count (/ secs 2))
			  (loop (+ count 1))))
		    ;; (thread-terminate! th1)
		    (set! res (list #f "TIMED OUT" #f)))
		  "Ping: th2")))
       (thread-start! th2)
       (thread-start! th1)
       (handle-exceptions
	exn
	(set! res (list #f "TIMED OUT" #f))
	(thread-join! th1 secs))
       res))))

;; (define (zmq-transport:self-ping server-info)
;;   ;; server-info: server-id interface pullport pubport
;;   (let ((iface    (list-ref server-info 1))
;; 	(pullport (list-ref server-info 2))
;; 	(pubport  (list-ref server-info 3)))
;;     (zmq-transport:client-connect iface pullport pubport)
;;     (let loop ()
;;       (thread-sleep! 2)
;;       (cdb:client-call *runremote* 'ping #t)
;;       (debug:print 4 "zmq-transport:self-ping - I'm alive on " iface ":" pullport "/" pubport "!")
;;       (mutex-lock! *heartbeat-mutex*)
;;       (set! *server-loop-heart-beat* (current-seconds))
;;       (mutex-unlock! *heartbeat-mutex*)
;;       (loop))))
    
(define (zmq-transport:reply pubsock target query-sig success/fail result)
  (debug:print-info 11 "zmq-transport:reply target=" target ", result=" result)
  (send-message pubsock target send-more: #t)
  (send-message pubsock (db:obj->string (vector success/fail query-sig result))))