Megatest

(define *rpc:listener*      #f) ;; if set up for server communication this will hold the tcp port
(define *runremote*         #f) ;; 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)
(define *server-id*         #f)
(define *server-info*       #f)
(define *time-to-exit*      #f)
(define *received-response* #f)
(define *default-numtries*  2)

(define *target*            (make-hash-table)) ;; cache the target here; target is keyval1/keyval2/.../keyvalN
(define *keys*              (make-hash-table)) ;; cache the keys here
(define *keyvals*           (make-hash-table))
(define *toptest-paths*     (make-hash-table)) ;; cache toptest path settings here
(define *test-paths*        (make-hash-table)) ;; cache test-id to test run paths here
(define *test-ids*          (make-hash-table)) ;; cache run-id, testname, and item-path => test-id

;;  PURPOSE.
;;======================================================================

;;======================================================================
;; Database access
;;======================================================================

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

(use sqlite3 srfi-1 posix regex regex-case srfi-69 csv-xml s11n md5 message-digest)
(import (prefix sqlite3 sqlite3:))

(use zmq)

(declare (unit db))
(declare (uses common))
(declare (uses keys))

			       (if currstatus (conc "status='" currstatus "' AND ") "")
			       " run_id=? AND testname=? AND NOT (item_path='' AND testname in (SELECT DISTINCT testname FROM tests WHERE testname=? AND item_path != ''));")))
		;;(debug:print 0 "QRY: " qry)
		(sqlite3:execute db qry run-id newstate newstatus testname testname)))
	    testnames))

(define (cdb:delete-tests-in-state zmqsocket run-id state)
  (cdb:client-call zmqsocket 'delete-tests-in-state #t *default-numtries* run-id state))

;; speed up for common cases with a little logic
(define (db:test-set-state-status-by-id db test-id newstate newstatus newcomment)
  (cond
   ((and newstate newstatus newcomment)
    (sqlite3:exectute db "UPDATE tests SET state=?,status=?,comment=? WHERE id=?;" newstate newstatus test-id))
   ((and newstate newstatus)

(define (db:test-set-comment db test-id comment)
  (sqlite3:execute 
   db 
   "UPDATE tests SET comment=? WHERE id=?;"
   comment test-id))

(define (cdb:test-set-rundir! zmqsocket run-id test-name item-path rundir)
  (cdb:client-call zmqsocket 'test-set-rundir #t *default-numtries* rundir run-id test-name item-path))

(define (cdb:test-set-rundir-by-test-id zmqsocket test-id rundir)
  (cdb:client-call zmqsocket 'test-set-rundir-by-test-id #t *default-numtries* rundir test-id))

(define (db:test-get-rundir-from-test-id db test-id)
  (let ((res #f)) ;; (hash-table-ref/default *test-paths* test-id #f)))
    ;; (if res
    ;;     res
    ;;     (begin
    (sqlite3:for-each-row
     (lambda (tpath)
       (set! res tpath))
     db 
     "SELECT rundir FROM tests WHERE id=?;"
     test-id)
    ;; (hash-table-set! *test-paths* test-id res)
    res)) ;; ))

(define (cdb:test-set-log! zmqsocket test-id logf)
  (if (string? logf)(cdb:client-call zmqsocket 'test-set-log #f *default-numtries* logf test-id)))

;;======================================================================
;; Misc. test related queries
;;======================================================================

(define (db:test-get-paths-matching db keynames target fnamepatt #!key (res '()))
  (let* ((testpatt   (if (args:get-arg "-testpatt")(args:get-arg "-testpatt") "%"))

;; (define (db:updater)
;;   (debug:print-info 4 "Starting cache processing")
;;   (let loop ()
;;     (thread-sleep! 10) ;; move save time around to minimize regular collisions?
;;     (db:write-cached-data)
;;     (loop)))













































































(define (db:obj->string obj)(with-output-to-string (lambda ()(serialize obj))))
(define (db:string->obj msg)(with-input-from-string msg (lambda ()(deserialize))))

(define (cdb:use-non-blocking-mode proc)
  (set! *client-non-blocking-mode* #t)
  (let ((res (proc)))
    (set! *client-non-blocking-mode* #f)
    res))
  
;; params = 'target cached remparams
;;
;; make-vector-record cdb packet client-sig qtype immediate query-sig params qtime
;;
(define (cdb:client-call zmq-sockets qtype immediate numretries . params)
  (debug:print-info 11 "cdb:client-call zmq-sockets=" zmq-sockets ", qtype=" qtype ", immediate=" immediate ", numretries=" numretries ", params=" params)
  (let* ((push-socket (vector-ref zmq-sockets 0))
	 (sub-socket  (vector-ref zmq-sockets 1))
	 (client-sig  (server:get-client-signature))
	 (query-sig   (message-digest-string (md5-primitive) (conc qtype immediate params)))
	 (zdat        (db:obj->string (vector client-sig qtype immediate query-sig params (current-seconds)))) ;; (with-output-to-string (lambda ()(serialize params))))
	 (res  #f)

	 (send-receive (lambda ()
			 (debug:print-info 11 "sending message")
			 (send-message push-socket zdat)
			 (debug:print-info 11 "message sent")
			 (let ((rmsg receive-message*)) ;; (if *client-non-blocking-mode* receive-message* receive-message)))
			   ;; get the sender info
			   ;; this should match (server:get-client-signature)
			   ;; we will need to process "all" messages here some day
			   (rmsg sub-socket)
			   ;; now get the actual message
			   (set! res (db:string->obj (rmsg  sub-socket))))))
	 (timeout (lambda ()
		    (thread-sleep! 60)
		    (if (not res)
			(if (> numretries 0)
			    (begin
			      (debug:print 0 "WARNING: no reply to query " params ", trying again")
			      (apply cdb:client-call zmq-sockets qtype immediate (- numretries 1) params))
			    (begin
			      (debug:print 0 "ERROR: cdb:client-call timed out " params ", exiting.")
			      (exit 5)))))))

    (debug:print-info 11 "Starting threads")
    (let ((th1 (make-thread send-receive "send receive"))
	  (th2 (make-thread timeout      "timeout")))
      (thread-start! th1)
      (thread-start! th2)
      (thread-join!  th1)
      (debug:print-info 11 "cdb:client-call returning res=" res)
      res)))
  
(define (cdb:set-verbosity zmq-socket val)
  (cdb:client-call zmq-socket 'set-verbosity #f *default-numtries* val))

(define (cdb:login zmq-sockets keyval signature)
  (cdb:client-call zmq-sockets 'login #t *default-numtries* keyval megatest-version signature))

(define (cdb:logout zmq-socket keyval signature)
  (cdb:client-call zmq-socket 'logout #t *default-numtries* keyval signature))

(define (cdb:num-clients zmq-socket)
  (cdb:client-call zmq-socket 'numclients #t *default-numtries*))

(define (cdb:test-set-status-state zmqsocket test-id status state msg)
  (if msg
      (cdb:client-call zmqsocket 'state-status-msg #t *default-numtries* state status msg test-id)
      (cdb:client-call zmqsocket 'state-status #t *default-numtries* state status test-id))) ;; run-id test-name item-path minutes cpuload diskfree tmpfree) 

(define (cdb:test-rollup-test_data-pass-fail zmqsocket test-id)
  (cdb:client-call zmqsocket 'test_data-pf-rollup #t *default-numtries* test-id test-id test-id test-id))

(define (cdb:pass-fail-counts zmqsocket test-id fail-count pass-count)
  (cdb:client-call zmqsocket 'pass-fail-counts #t *default-numtries* fail-count pass-count test-id))

(define (cdb:tests-register-test zmqsocket run-id test-name item-path)
  (let ((item-paths (if (equal? item-path "")
			(list item-path)
			(list item-path ""))))
    (cdb:client-call zmqsocket 'register-test #t *default-numtries* run-id test-name item-path)))

(define (cdb:flush-queue zmqsocket)
  (cdb:client-call zmqsocket 'flush #f *default-numtries*))

(define (cdb:kill-server zmqsocket)
  (cdb:client-call zmqsocket 'killserver #f *default-numtries*))

(define (cdb:roll-up-pass-fail-counts zmqsocket run-id test-name item-path status)
  (cdb:client-call zmqsocket 'immediate #f *default-numtries* open-run-close db:roll-up-pass-fail-counts #f run-id test-name item-path status))

(define (cdb:get-test-info zmqsocket run-id test-name item-path)
  (cdb:client-call zmqsocket 'immediate #f *default-numtries* open-run-close db:get-test-info #f run-id test-name item-path))

(define (cdb:get-test-info-by-id zmqsocket test-id)
  (cdb:client-call zmqsocket 'immediate #f *default-numtries* open-run-close db:get-test-info-by-id #f test-id))

;; db should be db open proc or #f
(define (cdb:remote-run proc db . params)
  (apply cdb:client-call *runremote* 'immediate #f *default-numtries* open-run-close proc #f params))

(define (db:test-get-logfile-info db run-id test-name)
  (let ((res #f))
    (sqlite3:for-each-row 
     (lambda (path final_logf)
       (set! logf final_logf)
       (set! res (list path final_logf))

                                    THEN 'PASS'
                                    ELSE status
                                    END WHERE id=?;")
	'(test-set-log            "UPDATE tests SET final_logf=? WHERE id=?;")
	'(test-set-rundir-by-test-id "UPDATE tests SET rundir=? WHERE id=?")
	'(test-set-rundir         "UPDATE tests SET rundir=? WHERE run_id=? AND testname=? AND item_path=?;")
	'(delete-tests-in-state   "DELETE FROM tests WHERE state=? AND run_id=?;")
	'(tests:test-set-toplog   "UPDATE tests SET final_logf=? WHERE run_id=? AND testname=? AND item_path='';")
    ))

;; do not run these as part of the transaction
(define db:special-queries   '(rollup-tests-pass-fail
			       db:roll-up-pass-fail-counts
                               login
                               immediate
			       flush))

;; not used, intended to indicate to run in calling process
(define db:run-local-queries '()) ;; rollup-tests-pass-fail))

;; The queue is a list of vectors where the zeroth slot indicates the type of query to
;; apply and the second slot is the time of the query and the third entry is a list of 
;; values to be applied
;;
(define (db:process-queue pubsock indata)
  (open-run-close
   (lambda (db . junkparams)
     (let ((queries    (make-hash-table))
	   (data       (sort indata (lambda (a b)
				      (< (cdb:packet-get-qtime a)(cdb:packet-get-qtime b))))))



       (if (> (length data) 0)
	   (debug:print-info 4 "Writing cached data " data))

       ;; prepare the needed statements, do each only once
       (for-each (lambda (request-item)
		   (let ((stmt-key (cdb:packet-get-qtype request-item)))
		     (debug:print-info 11 "stmt-key=" stmt-key ", request-item=" request-item)
		     (if (not (hash-table-ref/default queries stmt-key #f))
			 (let ((stmt (alist-ref stmt-key db:queries)))
			   (debug:print-info 11 "stmt-key=" stmt-key ", stmt=" stmt)
			   (if stmt
			       (hash-table-set! queries stmt-key (sqlite3:prepare db (car stmt)))
			       (if (procedure? stmt-key)
				   (hash-table-set! queries stmt-key #f)
				   (if (not (member stmt-key db:special-queries))
				       (debug:print 0 "ERROR: Missing query spec for " stmt-key "!"))))))))
		 data)
       
       ;; outer loop to handle special queries that cannot be handled in the
       ;; transaction.
       (let outerloop ((special-qry #f)
		       (stmts       data))
	 (debug:print-info 11 "special-qry=" special-qry ", stmts=" stmts)
	 (if special-qry

	     ;; handle a query that cannot be part of the grouped queries
	     (let* ((stmt-key       (cdb:packet-get-qtype special-qry))
		    (return-address (cdb:packet-get-client-sig special-qry))
		    (qry            (hash-table-ref/default queries stmt-key #f))
		    (params         (cdb:packet-get-params special-qry)))
	       (debug:print-info 11 "Special queries/requests stmt-key=" stmt-key ", return-address=" return-address ", qry=" qry ", params=" params)
	       (cond
		;; Special queries
		((string? qry)
		 (apply sqlite3:execute db qry params)
		 (server:reply pubsock return-address #t))
		;; ((and (not (null? params))
		;;       (procedure? (car params)))
		;;  (let ((proc      (car params))
		;;        (remparams (cdr params)))
		;;    ;; we are being handed a procedure so call it
		;;    (debug:print-info 11 "Running (apply " proc " " db " " remparams ")")
		;;    (server:reply pubsock return-address (apply proc db remparams))))
		
		(else 
		 (case stmt-key
		   ((immediate)
		    (let ((proc      (car params))
			  (remparams (cdr params)))
		      ;; we are being handed a procedure so call it
		      (debug:print-info 11 "Running (apply " proc " " remparams ")")
		      (server:reply pubsock return-address (apply proc remparams))))
		   ((login)
		    (if (< (length params) 3) ;; should get toppath, version and signature
			'(#f "login failed due to missing params") ;; missing params
			(let ((calling-path (car   params))
			      (calling-vers (cadr  params))
			      (client-key   (caddr params)))
			  (if (and (equal? calling-path *toppath*)
				   (equal? megatest-version calling-vers))
			      (begin
				(hash-table-set! *logged-in-clients* client-key (current-seconds))
				(server:reply  pubsock return-address '(#t "successful login")))      ;; path matches - pass! Should vet the caller at this time ...
			      (list #f (conc "Login failed due to mismatch paths: " calling-path ", " *toppath*))))))
		   ((flush)
		    (server:reply pubsock return-address '(#t "sucessful flush")))
		   (else
		    (debug:print 0 "ERROR: Unrecognised queued call " qry " " params)))))
	       (if (not (null? stmts))
		   (outerloop #f stmts)))

	     ;; handle normal queries
	     (let ((rem (sqlite3:with-transaction 
			 db
			 (lambda ()
			   (debug:print-info 11 "flushing " stmts " to db")
			   (if (null? stmts)
			       stmts
			       (let innerloop ((hed (car stmts))
					       (tal (cdr stmts)))
				 (let ((params         (cdb:packet-get-params hed))
				       (return-address (cdb:packet-get-client-sig hed))
				       (stmt-key       (cdb:packet-get-qtype hed)))
				   (if (or (not (hash-table-ref/default queries stmt-key #f))
					   (member stmt-key db:special-queries))
				       (begin
					 (debug:print-info 11 "Handling special statement " stmt-key)
					 (cons hed tal))
				       (begin
					 (debug:print-info 11 "Executing " stmt-key " for " params)
					 (apply sqlite3:execute (hash-table-ref queries stmt-key) params)
					 (server:reply pubsock return-address #t)
					 (if (not (null? tal))
					     (innerloop (car tal)(cdr tal))
					     '()))
				       ))))))))
	       (if (not (null? rem))
		   (outerloop (car rem)(cdr rem))))))
       (for-each (lambda (stmt-key)

(define-inline (db:step-stable-set-end!       vec val)(vector-set! vec 2 val))
(define-inline (db:step-stable-set-status!    vec val)(vector-set! vec 3 val))
(define-inline (db:step-stable-set-runtime!   vec val)(vector-set! vec 4 val))

;; use this one for db-get-run-info
(define-inline (db:get-row    vec)(vector-ref vec 1))

;; The data structure for handing off requests via wire
(define (make-cdb:packet)(make-vector 6))
(define-inline (cdb:packet-get-client-sig   vec)    (vector-ref  vec 0))
(define-inline (cdb:packet-get-qtype        vec)    (vector-ref  vec 1))
(define-inline (cdb:packet-get-immediate    vec)    (vector-ref  vec 2))
(define-inline (cdb:packet-get-query-sig    vec)    (vector-ref  vec 3))
(define-inline (cdb:packet-get-params       vec)    (vector-ref  vec 4))
(define-inline (cdb:packet-get-qtime        vec)    (vector-ref  vec 5))
(define-inline (cdb:packet-set-client-sig!  vec val)(vector-set! vec 0 val))
(define-inline (cdb:packet-set-qtype!       vec val)(vector-set! vec 1 val))
(define-inline (cdb:packet-set-immediate!   vec val)(vector-set! vec 2 val))
(define-inline (cdb:packet-set-query-sig!   vec val)(vector-set! vec 3 val))
(define-inline (cdb:packet-set-params!      vec val)(vector-set! vec 4 val))
(define-inline (cdb:packet-set-qtime!       vec val)(vector-set! vec 5 val))

  -rebuild-db             : bring the database schema up to date
  -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
  -list-servers            : list the servers 

  -repl                   : start a repl (useful for extending megatest)

Spreadsheet generation
  -extract-ods fname.ods  : extract an open document spreadsheet from the database
  -pathmod path           : insert path, i.e. path/runame/itempath/logfile.html
                            will clear the field if no rundir/testname/itempath/logfile
                            if it contains forward slashes the path will be converted

megatest -test-files 'logs/*.log' -target ubuntu/n%/no% :runname w49% -testpatt test_mt%

Called as " (string-intersperse (argv) " ") "
Built from " megatest-fossil-hash ))

;;  -gui                    : start a gui interface
;;  -config fname           : override the runconfig file with fname
;;  -kill-server host:port|pid : kill server specified by host:port or pid

;; process args
(define remargs (args:get-args 
		 (argv)
		 (list  "-runtests"  ;; run a specific test
			"-config"    ;; override the config file name
			"-execute"   ;; run the command encoded in the base64 parameter

			":variable"
			":value"
			":expected"
			":tol"
			":units"
			;; misc
			"-server"
			"-kill-server"
			"-port"
			"-extract-ods"
			"-pathmod"
			"-env2file"
			"-setvars"
			"-set-state-status"
			"-debug" ;; for *verbosity* > 2

			"-summarize-items"
		        "-gui"
			;; misc
			"-archive"
			"-repl"
			"-lock"
			"-unlock"
			"-list-servers"
			;; queries
			"-test-paths" ;; get path(s) to a test, ordered by youngest first

			"-runall"    ;; run all tests
			"-remove-runs"
			"-usequeue"
			"-rebuild-db"

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

(if (args:get-arg "-server")
    (begin
      (debug:print 1 "Launching server...")
      (server:launch)))

(if (args:get-arg "-list-servers")
	;; (args:get-arg "-kill-server"))
    (let ((tl (setup-for-run)))
      (if tl 
	  (let ((servers (open-run-close tasks:get-all-servers tasks:open-db))
		(fmtstr  "~5a~8a~8a~20a~20a~10a~10a~10a~10a\n")
		(servers-to-kill '()))
	    (format #t fmtstr "Id" "MTver" "Pid" "Host" "Interface" "OutPort" "InPort" "LastBeat" "State")
	    (format #t fmtstr "==" "=====" "===" "====" "=========" "=======" "======" "========" "=====")
	    (for-each 
	     (lambda (server)
	       (let* (;; (killinfo   (args:get-arg "-kill-server"))
		      ;; (khost-port (if killinfo (if (substring-index ":" killinfo)(string-split ":") #f) #f))
		      ;; (kpid       (if killinfo (if (substring-index ":" killinfo) #f (string->number killinfo)) #f))
		      (id         (vector-ref server 0))
		      (pid        (vector-ref server 1))
		      (hostname   (vector-ref server 2))
		      (interface  (vector-ref server 3))
		      (pullport   (vector-ref server 4))
		      (pubport    (vector-ref server 5))
		      (start-time (vector-ref server 6))
		      (priority   (vector-ref server 7))
		      (state      (vector-ref server 8))
		      (mt-ver     (vector-ref server 9))
		      (last-update (vector-ref server 10)) ;;   (open-run-close tasks:server-alive? tasks:open-db #f hostname: hostname port: port))
		      (killed     #f)
		      (status     (< last-update 20)))
		 ;;   (zmq-sockets (if status (server:client-connect hostname port) #f)))
		 ;; no need to login as status of #t indicates we are connecting to correct 
		 ;; server
		 (if (equal? state "dead")
		     (if (> last-update (* 25 60 60)) ;; keep records around for slighly over a day.
			 (open-run-close tasks:server-deregister tasks:open-db hostname pullport: pullport pid: pid action: 'delete))
		     (if (> last-update 20)        ;; Mark as dead if not updated in last 20 seconds




			 (open-run-close tasks:server-deregister tasks:open-db hostname pullport: pullport pid: pid)))





		 (format #t fmtstr id mt-ver pid hostname interface pullport pubport last-update
			 (if status "alive" "dead"))))
	     servers)
	    (debug:print-info 1 "Done with listservers")
	    (set! *didsomething* #t)
	    (exit) ;; must do, would have to add checks to many/all calls below
	    )
	  (exit)))
    ;; 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))
	(debug:print-info 1 "Server connection not needed")
	
	(server:client-launch)))

;;======================================================================
;; Remove old run(s)
;;======================================================================

;; since several actions can be specified on the command line the removal

;; 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)
;; (import (prefix rpc rpc:))

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

(use zmq)

(declare (unit server))

(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")

;; 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)
;; [ ]  [ ]    5. Add processing of subscription hits
;; [ ]  [ ]        - done when get key 
;; [ ]  [ ]        - return results
;; [ ]  [ ]    6. Add timeout processing
;; [ ]  [ ]        - after 60 seconds
;; [ ]  [ ]            i. check server alive, connect to new if necessary
;; [ ]  [ ]           ii. resend request
;; [ ]  [ ]    7. Turn self ping back on

(define (server: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))

;; (define (server: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)))
;;     (server:client-connect iface pullport pubport)
;;     (let loop ()
;;       (thread-sleep! 2)
;;       (cdb:client-call *runremote* 'ping #t)
;;       (debug:print 4 "server: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-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 (server:run hostn)
  (debug:print 0 "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* ((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 (server: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)

    ;; what to do when we quit
    ;;
    (on-exit (lambda ()
	       (if (and *toppath* *server-info*)
		   (begin
		     (open-run-close tasks:server-deregister-self tasks:open-db ipaddrstr p1 p2))
		   (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
    ;;
    (let loop ((queue-lst '()))




      (let* ((rawmsg (receive-message* pull-socket))
	     (packet (db:string->obj rawmsg)))





	(debug:print-info 12 "server=> received packet=" packet)





	(if #t ;; (cdb:packet-get-immediate packet) ;; process immediately or put in queue
	    (begin

	      (db:process-queue pub-socket (cons packet queue-lst))

	      (loop '()))
	    (loop (cons packet queue-lst)))))))

(define (server:reply pubsock target result)
  (debug:print-info 11 "server:reply target=" target ", result=" result)
  (send-message pubsock target send-more: #t)
  (send-message pubsock (db:obj->string result)))

;; run server:keep-running in a parallel thread to monitor that the db is being 
;; used and to shutdown after sometime if it is not.
;;
(define (server: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
				(sleep 4)
				(loop))))))
	 (iface       (cadr server-info))
	 (pullport    (caddr server-info))
	 (pubport     (cadddr server-info)) ;; id interface pullport pubport)
	 ;; (zmq-sockets (server:client-connect iface pullport pubport))
	 )
    (let loop ((count 0))
      (thread-sleep! 4) ;; no need to do this very often

      ;; (let ((queue-len (string->number (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
      (if (> (+ *last-db-access* 
		;; (* 48 60 60)    ;; 48 hrs
		;; 60              ;; one minute
		(* 60 60)       ;; one hour
		)
	     (current-seconds))
	  (begin

	    (debug:print-info 2 "Server continuing, seconds since last db access: " (- (current-seconds) *last-db-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 (server: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)
	   (server: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 0 "Trying to start server on " zmq-url)
       (bind-socket s zmq-url)
       (list iface s port)))))

(define (server:setup-ports ipaddrstr startport)
  (let* ((s1 (server:find-free-port-and-open ipaddrstr #f startport 'pull))
	 (p1 (caddr s1))
	 (s2 (server: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 p2 0 'live))
    (mutex-unlock! *heartbeat-mutex*)
    (list s1 s2)))

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

(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*)))

;; 
(define (server: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     (server: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 (server:client-login zmq-sockets)
  (cdb:login zmq-sockets *toppath* (server:get-client-signature)))

(define (server:client-logout zmq-socket)
  (let ((ok (and (socket? zmq-socket)
		 (cdb:logout zmq-socket *toppath* (server:get-client-signature)))))
    ;; (close-socket zmq-socket)
    ok))

(define (server:client-connect iface pullport pubport)
  (let* ((push-socket (server:client-socket-connect iface pullport type: 'push))
	 (sub-socket  (server:client-socket-connect iface pubport
						    type: 'sub
						    subscriptions: (list (server:get-client-signature) "all")))
	 (zmq-sockets (vector push-socket sub-socket))
	 (login-res   #f))
    (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))))

;; Do all the connection work, start a server if not already running
(define (server:client-setup #!key (numtries 50))
  (if (not *toppath*)
      (if (not (setup-for-run))
	  (begin
	    (debug:print 0 "ERROR: failed to find megatest.config, exiting")
	    (exit))))
  (let ((hostinfo   (open-run-close tasks:get-best-server tasks:open-db)))
    (if hostinfo
	(let ((host     (list-ref hostinfo 0))
	      (iface    (list-ref hostinfo 1))
	      (pullport (list-ref hostinfo 2))
	      (pubport  (list-ref hostinfo 3)))
	  (debug:print-info 2 "Setting up to connect to " hostinfo)
	  ;; (handle-exceptions
	  ;;   exn
	  ;;  (begin
	  ;;    ;; something went wrong in connecting to the server. In this scenario it is ok
	  ;;    ;; to try again
	  ;;    (debug:print 0 "ERROR: Failed to open a connection to the server at: " hostinfo)
	  ;;    (debug:print 0 "   EXCEPTION: " ((condition-property-accessor 'exn 'message) exn))
	  ;;    (debug:print 0 "   perhaps jobs killed with -9? Removing server records")
	  ;;    (open-run-close tasks:server-deregister tasks:open-db host pullport: pullport)
	  ;;    (server:client-setup (- numtries 1))
	  ;;    #f)
	   (server:client-connect iface pullport pubport)) ;; )












	(if (> numtries 0)
	    (let ((exe (car (argv))))
	      (debug:print-info 1 "No server available, attempting to start one...")
	      (process-run exe (list "-server" "-" "-debug" (conc *verbosity*)))
	      (sleep 5) ;; give server time to start
	      ;; we are starting a server, do not try again! That can lead to 
	      ;; recursively starting many processes!!!

	    (debug:print 0 "ERROR: cannot find megatest.config, exiting")
	    (exit))))
  (debug:print-info 1 "Starting the standalone server")
  (let ((hostinfo (open-run-close tasks:get-best-server tasks:open-db)))
    (if hostinfo
	(debug:print-info 1 "NOT starting new server, one is already running on " (car hostinfo) ":" (cadr hostinfo))
	(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 1 "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 1 "Server alive, starting self-ping")
		   ;;      		 (server:self-ping server-info)
		   ;;      		 ))
		   ;;      	     "Self ping"))
		   (th2 (make-thread (lambda ()
				       (server:run (args:get-arg "-server"))) "Server run"))
		   (th3 (make-thread (lambda ()(server: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")))
    (exit)))

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

;; ping a server and return number of clients or #f (if no response)
;; NOT IN USE!
(define (server: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))

;;======================================================================
;; Tasks db
;;======================================================================

(define (tasks:open-db)
  (let* ((dbpath  (conc *toppath* "/monitor.db"))
	 (exists  (if (file-exists? dbpath)
		      ;; BUGGISHNESS: Remove this code in six months. Today is 11/13/2012
		      (if (< (file-change-time dbpath) 1352851396.0)
			  (begin
			    (debug:print 0 "NOTE: removing old db file " dbpath)
			    (delete-file dbpath)
			    #f)
			  #t)
		      #f))
	 (mdb     (sqlite3:open-database dbpath)) ;; (never-give-up-open-db dbpath))
	 (handler (make-busy-timeout 36000)))
    (sqlite3:set-busy-handler! mdb handler)
    (sqlite3:execute mdb (conc "PRAGMA synchronous = 0;"))
    (if (not exists)
	(begin
	  (sqlite3:execute mdb "CREATE TABLE IF NOT EXISTS tasks_queue (id INTEGER PRIMARY KEY,

                                hostname TEXT,
                                username TEXT,
                               CONSTRAINT monitors_constraint UNIQUE (pid,hostname));")
	  (sqlite3:execute mdb "CREATE TABLE IF NOT EXISTS servers (id INTEGER PRIMARY KEY,
                                  pid INTEGER,
                                  interface TEXT,
                                  hostname TEXT,
                                  pullport INTEGER,
                                  pubport  INTEGER,
                                  start_time TIMESTAMP,
                                  priority INTEGER,
                                  state TEXT,
                                  mt_version TEXT,
                                  heartbeat TIMESTAMP,
                               CONSTRAINT servers_constraint UNIQUE (pid,hostname,pullport,pubport));")
	  (sqlite3:execute mdb "CREATE TABLE IF NOT EXISTS clients (id INTEGER PRIMARY KEY,
                                  server_id INTEGER,
                                  pid INTEGER,
                                  hostname TEXT,
                                  cmdline TEXT,
                                  login_time TIMESTAMP,
                                  logout_time TIMESTAMP DEFAULT -1,
                                CONSTRAINT clients_constraint UNIQUE (pid,hostname));")
                                  
	  ))
    mdb))
    
;;======================================================================
;; Server and client management
;;======================================================================

;; state: 'live, 'shutting-down, 'dead
(define (tasks:server-register mdb pid interface pullport pubport priority state)
  (sqlite3:execute 
   mdb 
   "INSERT OR REPLACE INTO servers (pid,hostname,pullport,pubport,start_time,priority,state,mt_version,heartbeat,interface)
                             VALUES(?,  ?,       ?,       ?, strftime('%s','now'), ?, ?, ?, strftime('%s','now'),?);"
   pid (get-host-name) pullport pubport priority (conc state) megatest-version interface)
  (list 
   (tasks:server-get-server-id mdb (get-host-name) pullport pid)
   interface
   pullport
   pubport))

;; NB// two servers with same pid on different hosts will be removed from the list if pid: is used!
(define (tasks:server-deregister mdb hostname #!key (pullport #f)(pid #f)(action 'markdead))
  (debug:print-info 11 "server-deregister " hostname ", pullport " pullport ", pid " pid)
  (if pid
      (case action
	((delete)(sqlite3:execute mdb "DELETE FROM servers WHERE pid=?;" pid))
	(else    (sqlite3:execute mdb "UPDATE servers SET state='dead' WHERE pid=?;" pid)))
      (if pullport
	  (case action
	    ((delete)(sqlite3:execute mdb "DELETE FROM servers WHERE  hostname=? AND pullport=?;" hostname port))
	    (else    (sqlite3:execute mdb "UPDATE servers SET state='dead' WHERE hostname=? AND pullport=?;" hostname pullport)))
	  (debug:print 0 "ERROR: tasks:server-deregister called with neither pid nor port specified"))))

(define (tasks:server-deregister-self mdb hostname)
  (tasks:server-deregister mdb hostname pid: (current-process-id)))

(define (tasks:server-get-server-id mdb hostname pullport pid)
  (let ((res #f))
    (sqlite3:for-each-row
     (lambda (id)
       (set! res id))
     mdb
     (if (and hostname  pid)
	 "SELECT id FROM servers WHERE hostname=? AND pid=?;"
	 "SELECT id FROM servers WHERE hostname=? AND pullport=?;")
     hostname (if pid pid pullport))
    res))

(define (tasks:server-update-heartbeat mdb server-id)
  (sqlite3:execute mdb "UPDATE servers SET heartbeat=strftime('%s','now') WHERE id=?;" server-id))

;; alive servers keep the heartbeat field upto date with seconds every 6 or so seconds
(define (tasks:server-alive? mdb server-id #!key (hostname #f)(pullport #f)(pid #f))
  (let* ((server-id  (if server-id 
			 server-id
			 (tasks:server-get-server-id mdb hostname pullport pid)))
	 (heartbeat-delta 99e9))
    (sqlite3:for-each-row
     (lambda (delta)
       (set! heartbeat-delta delta))
     mdb "SELECT strftime('%s','now')-heartbeat FROM servers WHERE id=?;" server-id)
    (< heartbeat-delta 10)))

;; ping each server in the db and return first found that responds. 
;; remove any others. will not necessarily remove all!
(define (tasks:get-best-server mdb)
  (let ((res '())
	(best #f))
    (sqlite3:for-each-row
     (lambda (id hostname interface pullport pubport pid)
       (set! res (cons (list hostname interface pullport pubport pid) res))
       (debug:print-info 2 "Found existing server " hostname ":" pullport " registered in db"))
     mdb
     "SELECT id,hostname,interface,pullport,pubport,pid FROM servers
         WHERE strftime('%s','now')-heartbeat < 10
               AND mt_version=? ORDER BY start_time ASC LIMIT 1;" megatest-version)

    (if (null? res) #f
	(let loop ((hed (car res))
		   (tal (cdr res)))
	  ;; (print "hed=" hed ", tal=" tal)
	  (let* ((host     (list-ref hed 0))
		 (iface    (list-ref hed 1))
		 (pullport (list-ref hed 2))
		 (pubport  (list-ref hed 3))
		 (pid      (list-ref hed 4))
		 (alive    (open-run-close tasks:server-alive? tasks:open-db #f hostname: host pullport: pullport)))
	    (if alive
		(begin
		  (debug:print-info 2 "Found an existing, alive, server " host ", " pullport " and " pubport ".")
		  (list host iface pullport pubport))
		(begin
		  (debug:print-info 1 "Marking " host ":" pullport " as dead in server registry.")
		  (if pullport
		      (open-run-close tasks:server-deregister tasks:open-db host pullport: pullport)
		      (open-run-close tasks:server-deregister tasks:open-db host pid:  pid))
		  (if (null? tal)
		      #f
		      (loop (car tal)(cdr tal))))))))))

(define (tasks:mark-server hostname pullport pid state)
  (if port
      (open-run-close tasks:server-deregister tasks:open-db hostname port: port)
      (open-run-close tasks:server-deregister tasks:open-db hostname pid:  pid)))


;; NOTE: NOT PORTED TO WORK WITH pullport/pubport
(define (tasks:kill-server status hostname port pid)
  (debug:print-info 1 "Removing defunct server record for " hostname ":" port)
  (if port
      (open-run-close tasks:server-deregister tasks:open-db hostname port: port)
      (open-run-close tasks:server-deregister tasks:open-db hostname pid:  pid))
  (if status ;; #t means alive
      (begin

	    (if (equal? hostname (get-host-name))
		(begin
		  (debug:print-info 1 "Sending signal/term to " pid " on " hostname)
		  (process-signal pid signal/term)  ;; local machine, send sig term
		  (thread-sleep! 5)                 ;; give it five seconds to die peacefully then do a brutal kill
		  (process-signal pid signal/kill)) 
		(debug:print 0 "WARNING: Can't kill frozen server on remote host " hostname))))))



(define (tasks:get-all-servers mdb)
  (let ((res '()))
    (sqlite3:for-each-row
     (lambda (id pid hostname interface pullport pubport start-time priority state mt-version last-update)
       (set! res (cons (vector id pid hostname interface pullport pubport start-time priority state mt-version last-update) res)))
     mdb
     "SELECT id,pid,hostname,interface,pullport,pubport,start_time,priority,state,mt_version,strftime('%s','now')-heartbeat AS last_update FROM servers ORDER BY start_time DESC;")
    res))
       

;;======================================================================
;; Tasks and Task monitors
;;======================================================================

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

(test "setup for run" #t (begin (setup-for-run)
				(string? (getenv "MT_RUN_AREA_HOME"))))

(test "server-register, get-best-server" #t (let ((res #f))
					      (open-run-close tasks:server-register tasks:open-db 1 "bob" 1234 1235 100 'live)
					      (set! res (open-run-close tasks:get-best-server tasks:open-db))
					      (number? (cadddr res))))

(test "de-register server" #t (let ((res #f))
				(open-run-close tasks:server-deregister tasks:open-db "bob" pullport: 1234)
				(list? (open-run-close tasks:get-best-server tasks:open-db))))

(define hostinfo #f)
(test "get-best-server" #t (let ((dat (open-run-close tasks:get-best-server tasks:open-db)))
			     (set! hostinfo dat) ;; host ip pullport pubport
			     (and (string? (car dat))
				  (number? (caddr dat)))))

(test #f #t (let ((zmq-socket (server:client-connect
			       (cadr hostinfo)
			       (caddr hostinfo)
			       (cadddr hostinfo))))
	      (set! *runremote* zmq-socket)
	      (socket? (vector-ref *runremote* 0))))

(test #f #t (let ((res (server:client-login *runremote*)))
	      (car res)))

(test #f #t (socket? (vector-ref *runremote* 0)))

;; (test #f #t (server:client-setup))

(test #f #t (car (cdb:login *runremote* *toppath* *my-client-signature*)))



;;======================================================================
;; C O N F I G   F I L E S 
;;======================================================================

(define conffile #f)
(test "Read a config" #t (hash-table? (read-config "test.config" #f #f)))
(test "Read a config that doesn't exist" #t (hash-table? (read-config "nada.config" #f #f)))

(use zmq posix)

(define cname "Bob")
(define runtime 10)
(let ((args (argv)))
  (if (< (length args) 3)
      (begin
	(print "Usage: mockupclient clientname runtime")
	(exit))
      (begin
	(set! cname (cadr args))
	(set! runtime (string->number (caddr args))))))
      
;; (define start-delay (/ (random 100) 9))
;; (define runtime     (+ 1 (/ (random 200) 2)))

(print "Starting client " cname " with runtime " runtime)

(include "mockupclientlib.scm")

(set! endtime (+ (current-seconds) runtime))

(let loop ()
  (let ((x (random 15))
	(varname (list-ref (list "hello" "goodbye" "saluton" "kiaorana")(random 4))))
    (case x
      ;; ((1)(dbaccess cname 'sync "nodat"    #f))
      ((2 3 4 5)(dbaccess cname 'set varname (random 999)))
      ((6 7 8 9 10)(print cname ": Get \"" varname "\" " (dbaccess cname 'get varname #f)))
      (else
       (thread-sleep! 0.011)))
    (if (< (current-seconds) endtime)
	(loop))))

(print "Client " cname " all done!!")

;; pub/sub with envelope address
;; Note that if you don't insert a sleep, the server will crash with SIGPIPE as soon
;; as a client disconnects.  Also a remaining client may receive tons of
;; messages afterward.

(use zmq srfi-18 sqlite3)

(define pub (make-socket 'pub))
(define pull (make-socket 'pull))
(define cname "server")
(define total-db-accesses 0)
(define start-time (current-seconds))

(bind-socket pub "tcp://*:5563")
(bind-socket pull "tcp://*:5564")

(define (open-db)
  (let* ((dbpath    "mockup.db")
	 (dbexists  (file-exists? dbpath))
	 (db        (open-database dbpath)) ;; (never-give-up-open-db dbpath))
	 (handler   (make-busy-timeout 10)))
    (set-busy-handler! db handler)
    (if (not dbexists)
	(for-each
	 (lambda (stmt)
	   (execute db stmt))
	 (list
	  "PRAGMA SYNCHRONOUS=0;"
	  "CREATE TABLE clients (id INTEGER PRIMARY KEY,name TEXT,num_accesses INTEGER DEFAULT 0);"
	  "CREATE TABLE vars    (var TEXT,val TEXT,CONSTRAINT vars_constraint UNIQUE (var));")))
    db))

(define cid-cache (make-hash-table))

(define (get-client-id db cname)
  (let ((cid (hash-table-ref/default cid-cache cname #f)))
    (if cid 
	cid
	(begin
	  (execute db "INSERT OR REPLACE INTO clients (name) VALUES(?);" cname)
	  (for-each-row 
	   (lambda (id)
	     (set! cid id))
	   db
	   "SELECT id FROM clients WHERE name=?;" cname)
	  (hash-table-set! cid-cache cname cid)
	  (set! total-db-accesses (+ total-db-accesses 2))
	  cid))))

(define (count-client db cname)
  (let ((cid (get-client-id db cname)))
    (execute db "UPDATE clients SET num_accesses=num_accesses+1 WHERE id=?;" cid)
    (set! total-db-accesses (+ total-db-accesses 1))
    ))

(define db (open-db))
;; (define queuelst '())
;; (define mx1 (make-mutex))

(define max-queue-len 0)

(define (process-queue queuelst)
  (let ((queuelen (length queuelst)))
    (if (> queuelen max-queue-len)
	(set! max-queue-len queuelen))
    (for-each
     (lambda (item)
       (let ((cname (vector-ref item 1))
	     (clcmd (vector-ref item 2))
	     (cdata (vector-ref item 3)))
	 (send-message pub cname send-more: #t)
	 (send-message pub (case clcmd
			     ((sync)
			      (conc queuelen))
			     ((set)
			      (set! total-db-accesses (+ total-db-accesses 1))
			      (apply execute db "INSERT OR REPLACE INTO vars (var,val) VALUES (?,?);" (string-split cdata))
			      "ok")
			     ((get)
			      (set! total-db-accesses (+ total-db-accesses 1))
			      (let ((res "noval"))
				(for-each-row
				 (lambda (val)
				   (set! res val))
				 db 
				 "SELECT val FROM vars WHERE var=?;" cdata)
				res))
			     (else (conc "unk cmd: " clcmd))))))
     queuelst)))

(define th1 (make-thread 
	     (lambda ()
	       (let ((last-run 0)) ;; current-seconds when run last
		 (let loop ((queuelst '()))
		   (let* ((indat (receive-message* pull))
			  (parts (string-split indat ":"))
			  (cname (car parts))                   ;; client name
			  (clcmd (string->symbol (cadr parts))) ;; client cmd
			  (cdata (caddr parts))                 ;; client data
			  (svect (vector (current-seconds) cname clcmd cdata))) ;; record for the queue
		     (count-client db cname)
		     (case clcmd
		       ((sync) ;; just process the queue
			(print "Got sync from " cname)
			(process-queue (cons svect queuelst))
			(loop '()))
		       ((get)
			(process-queue (cons svect queuelst))
			(loop '()))
		       (else
			(loop (cons svect queuelst))))))))
	     "server thread"))

(include "mockupclientlib.scm")

;; send a sync to the pull port
(define th2 (make-thread
	     (lambda ()
	       (let ((last-action-time (current-seconds)))
		 (let loop ()
		   (thread-sleep! 5)
		   (let ((queuelen (string->number (dbaccess "server" 'sync "nada" #f)))
			 (last-action-delta #f))
		     (if (> queuelen 1)(set! last-action-time (current-seconds)))
		     (set! last-action-delta (- (current-seconds) last-action-time))
		     (print "Server: Got queuelen=" queuelen ", last-action-delta=" last-action-delta)
		     (if (< last-action-delta 60)
			 (loop)
			 (print "Server exiting, 25 seconds since last access"))))))
	     "sync thread"))

(thread-start! th1)
(thread-start! th2)
(thread-join! th2)

(let* ((run-time       (- (current-seconds) start-time))
       (queries/second (/  total-db-accesses run-time)))
  (print "Server exited! Total db accesses=" total-db-accesses " in " run-time " seconds for " queries/second " queries/second with max queue length of: " max-queue-len))

#!/bin/bash

rm -f mockup.db

echo Compiling mockupserver.scm and mockupclient.scm
csc mockupserver.scm
csc mockupclient.scm

echo Starting server
./mockupserver &

sleep 1

echo Starting clients
for i in a b c d e f g h i j k l m n o p q s t u v w x y z; 
  do
  for k in a b;
    do
    for j in 0 1 2 3 4 5 6 7 8 9;
      do
      waittime=`random 0 60`
      runtime=`random 5 120`
      echo "Starting client $i$k$j with waittime $waittime and runtime $runtime" 
      (sleep $waittime;./mockupclient $i$k$j $runtime) &
    done
  done
done

wait
echo testmockup.sh script done
# echo "Waiting for 5 seconds then killing all mockupserver and mockupclient processes"
# sleep 30
# killall -v mockupserver mockupclient

#! /bin/env bash

set -x

# Copyright 2007-2010, 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.

echo You may need to do the following first:
echo sudo apt-get install libreadline-dev
echo sudo apt-get install libwebkitgtk-dev 
echo sudo apt-get install libmotif3 -OR- set KTYPE=26g4
echo KTYPE can be 26, 26g4, or 32
echo KTYPE=$KTYPE
echo You are using PREFIX=$PREFIX
echo You are using proxy="$proxy"
echo 
echo "Set additional_libpath to help find gtk or other libraries, don't forget a leading :"

if [[ -e ${ZEROMQ}${zpatchlev}.tar.gz ]] ; then
    tar xfz ${ZEROMQ}.tar.gz
    cd ${ZEROMQ}
    ln -s $PREFIX/include/uuid src
    # LDFLAGS=-L$PREFIX/lib ./configure --prefix=$PREFIX 
    
    ./configure --enable-static --prefix=$PREFIX --with-uuid=$PREFIX LDFLAGS="-L$PREFIX/lib" CPPFLAGS="-fPIC -I$PREFIX/include" LIBS="-lgcc"
    # --disable-shared CPPFLAGS="-fPIC 
    # LDFLAGS="-L/usr/lib64 -L$PREFIX/lib" ./configure --enable-static --prefix=$PREFIX 
    make
    make install
    CSC_OPTIONS="-I$PREFIX/include -L$CSCLIBS" chicken-install $PROX zmq
    # CSC_OPTIONS="-I$PREFIX/include -L$CSCLIBS" chicken-install $PROX -deploy -prefix $DEPLOYTARG zmq
fi