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Comment:Streamlined db access a little, test4 completes in reasonable time
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SHA1: a893c641ca8382904e2279a6c08147af4487721e
User & Date: matt on 2013-01-27 10:04:16
Other Links: branch diff | manifest | tags
Context
2013-01-27
12:22
Merged http-transport to trunk check-in: 6bba674f33 user: matt tags: trunk
10:04
Streamlined db access a little, test4 completes in reasonable time Closed-Leaf check-in: a893c641ca user: matt tags: http-transport
2013-01-25
23:55
Got http-server running clean against test1 check-in: d294210580 user: matt tags: http-transport
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Modified db.scm from [2a22e51a7a] to [94fba19596].

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     (debug:print 0 "  " ((condition-property-accessor 'exn 'message) exn))
     (print-call-chain)
     (thread-sleep! (random 120))
     (debug:print-info 0 "trying db call one more time....")
     (apply open-run-close-no-exception-handling proc idb params))
   (apply open-run-close-no-exception-handling proc idb params)))

(define open-run-close open-run-close-exception-handling)


(define *global-delta* 0)
(define *last-global-delta-printed* 0)

(define (open-run-close-measure  proc idb . params)
  (debug:print-info 11 "open-run-close-measure START, idb=" idb ", params=" params)
  (let* ((start-ms (current-milliseconds))








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     (debug:print 0 "  " ((condition-property-accessor 'exn 'message) exn))
     (print-call-chain)
     (thread-sleep! (random 120))
     (debug:print-info 0 "trying db call one more time....")
     (apply open-run-close-no-exception-handling proc idb params))
   (apply open-run-close-no-exception-handling proc idb params)))

;; (define open-run-close open-run-close-exception-handling)
(define open-run-close open-run-close-no-exception-handling)

(define *global-delta* 0)
(define *last-global-delta-printed* 0)

(define (open-run-close-measure  proc idb . params)
  (debug:print-info 11 "open-run-close-measure START, idb=" idb ", params=" params)
  (let* ((start-ms (current-milliseconds))
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Modified server.scm from [7120661741] to [12f5deda72].

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      (if (not (setup-for-run))
	  (begin
	    (debug:print 0 "ERROR: cannot find megatest.config, cannot start server, exiting")
	    (exit))))
  (let* (;; (iface           (if (string=? "-" hostn)
	 ;;        	      #f ;; (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 hostn))) ;; hostname)))
	 (start-port    (if (args:get-arg "-port")
			    (string->number (args:get-arg "-port"))
			    (+ 5000 (random 1001))))
	 (link-tree-path (config-lookup *configdat* "setup" "linktree")))
    (set! *cache-on* #t)
    (root-path     (if link-tree-path 
		       link-tree-path
		       (current-directory))) ;; WARNING: SECURITY HOLE. FIX ASAP!



    (vhost-map `(((* any) . ,(lambda (continue)


			       (let* (($   (request-vars source: 'both))
				      (dat ($ 'dat))
				      (res #f))
				 (cond
				  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ "hey"))
				   (send-response body: "hey there!\n"
						  headers: '((content-type text/plain))))


				  ((equal? (uri-path (request-uri (current-request)))
					   '(/ "ctrl"))
				   (let* ((packet (db:string->obj dat))
					  (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*)))
				     ;; (mutex-lock! *db:process-queue-mutex*) ;; trying a mutex
				     (set! res (open-run-close db:process-queue-item open-db packet))

				     ;; (mutex-unlock! *db:process-queue-mutex*)
				     (debug:print-info 11 "Return value from db:process-queue-item is " res)
				     (send-response body: (conc "<head>ctrl data</head>\n<body>"
								res
								"</body>")
						    headers: '((content-type text/plain)))))
				  (else (continue))))))))
    (server:try-start-server ipaddrstr start-port)))





;; (define (server:main-loop)
;;   (print "INFO: Exectuing main server loop")
;;   (access-log "megatest-http.log")
;;   (server-bind-address #f)
;;   (define-page (main-page-path)








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      (if (not (setup-for-run))
	  (begin
	    (debug:print 0 "ERROR: cannot find megatest.config, cannot start server, exiting")
	    (exit))))
  (let* (;; (iface           (if (string=? "-" hostn)
	 ;;        	      #f ;; (get-host-name) 
	 ;;        	      hostn))
	 (db              #f) ;;        (open-db)) ;; we don't want the server to be opening and closing the db unnecesarily
	 (hostname        (get-host-name))
	 (ipaddrstr       (let ((ipstr (if (string=? "-" hostn)
					   (string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
					   #f)))
			    (if ipstr ipstr hostn))) ;; hostname)))
	 (start-port    (if (args:get-arg "-port")
			    (string->number (args:get-arg "-port"))
			    (+ 5000 (random 1001))))
	 (link-tree-path (config-lookup *configdat* "setup" "linktree")))
    (set! *cache-on* #t)
    (root-path     (if link-tree-path 
		       link-tree-path
		       (current-directory))) ;; WARNING: SECURITY HOLE. FIX ASAP!

    ;; Setup the web server and a /ctrl interface
    ;;
    (vhost-map `(((* any) . ,(lambda (continue)
			       ;; open the db on the first call 
			       (if (not db)(set! db (open-db)))
			       (let* (($   (request-vars source: 'both))
				      (dat ($ 'dat))
				      (res #f))
				 (cond
				  ((equal? (uri-path (request-uri (current-request))) 
					   '(/ "hey"))
				   (send-response body: "hey there!\n"
						  headers: '((content-type text/plain))))
				  ;; This is the /ctrl path where data is handed to the server and
				  ;; responses 
				  ((equal? (uri-path (request-uri (current-request)))
					   '(/ "ctrl"))
				   (let* ((packet (db:string->obj dat))
					  (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*)))
				     ;; (mutex-lock! *db:process-queue-mutex*) ;; trying a mutex
				     ;; (set! res (open-run-close db:process-queue-item open-db packet))
				     (set! res (db:process-queue-item db packet))
				     ;; (mutex-unlock! *db:process-queue-mutex*)
				     (debug:print-info 11 "Return value from db:process-queue-item is " res)
				     (send-response body: (conc "<head>ctrl data</head>\n<body>"
								res
								"</body>")
						    headers: '((content-type text/plain)))))
				  (else (continue))))))))
    (server:try-start-server ipaddrstr start-port)
    ;; lite3:finalize! db)))
    ))



;; (define (server:main-loop)
;;   (print "INFO: Exectuing main server loop")
;;   (access-log "megatest-http.log")
;;   (server-bind-address #f)
;;   (define-page (main-page-path)
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   (set! *runremote* (list ipaddrstr portnum))
   (open-run-close tasks:remove-server-records tasks:open-db)
   (open-run-close tasks:server-register 
		   tasks:open-db 
		   (current-process-id)
		   ipaddrstr portnum 0 'live)
   (print "INFO: Trying to start server on " ipaddrstr ":" portnum)
   ;; (awful-start server:main-loop port: portnum) ;; ip-address: ipaddrstr 
   (start-server port: portnum)
   (print "INFO: server has been stopped")))

(define (server: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 
;;======================================================================




(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 
  (db:obj->string (vector success/fail query-sig result)))

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








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   (set! *runremote* (list ipaddrstr portnum))
   (open-run-close tasks:remove-server-records tasks:open-db)
   (open-run-close tasks:server-register 
		   tasks:open-db 
		   (current-process-id)
		   ipaddrstr portnum 0 'live)
   (print "INFO: Trying to start server on " ipaddrstr ":" portnum)
   ;; This starts the spiffy server
   (start-server port: portnum)
   (print "INFO: server has been stopped")))

(define (server: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 
;;======================================================================

;; 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 
  (db:obj->string (vector success/fail query-sig result)))

;;======================================================================
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	 (numretries 0))     
    (handle-exceptions
     exn
     (if (< numretries 200)
	 (server:client-send-receive serverdat msg))
     (begin
       (debug:print-info 11 "fullurl=" fullurl "\n")

       (max-retry-attempts 100)
       (retry-request? (lambda (request)
			 (thread-sleep! (/ (if (> numretries 100) 100 numretries) 10))
			 (set! numretries (+ numretries 1))
			 #t))



       (let* ((res   (with-input-from-request fullurl 
					      ;; #f
					      ;; msg 
					      (list (cons 'dat msg)) 
					      read-string)))
	 (debug:print-info 11 "got res=" res)
	 (let ((match (string-search (regexp "<body>(.*)<.body>") res)))








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	 (numretries 0))     
    (handle-exceptions
     exn
     (if (< numretries 200)
	 (server:client-send-receive serverdat msg))
     (begin
       (debug:print-info 11 "fullurl=" fullurl "\n")
       ;; set up the http-client here
       (max-retry-attempts 100)
       (retry-request? (lambda (request)
			 (thread-sleep! (/ (if (> numretries 100) 100 numretries) 10))
			 (set! numretries (+ numretries 1))
			 #t))
       ;; send the data and get the response
       ;; extract the needed info from the http data and 
       ;; process and return it.
       (let* ((res   (with-input-from-request fullurl 
					      ;; #f
					      ;; msg 
					      (list (cons 'dat msg)) 
					      read-string)))
	 (debug:print-info 11 "got res=" res)
	 (let ((match (string-search (regexp "<body>(.*)<.body>") res)))
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	(let ((host     (list-ref hostinfo 0))
	      (iface    (list-ref hostinfo 1))
	      (port     (list-ref hostinfo 2))
	      (pid      (list-ref hostinfo 3)))
	  (debug:print-info 2 "Setting up to connect to " hostinfo)
	  (server:client-connect iface port)) ;; )
	(if (> numtries 0)
	    (let (;; (exe (car (argv)))
		  (pid #f))
	      (debug:print-info 0 "No server available, attempting to start one...")
	      ;; (set! pid (process-run exe (list "-server" "-" "-debug" (if (list? *verbosity*)
	      ;;   							  (string-intersperse *verbosity* ",")
	      ;;   							  (conc *verbosity*)))))
	      (set! pid (process-fork (lambda ()
					;; (current-input-port  (open-input-file  "/dev/null"))
					;; (current-output-port (open-output-file "/dev/null"))
					;; (current-error-port  (open-output-file "/dev/null"))
					(server:launch))))
	      (let loop ((count 0))
		(let ((hostinfo (open-run-close tasks:get-best-server tasks:open-db)))
		  (if (not hostinfo)
		      (begin
			(debug:print-info 0 "Waiting for server pid=" pid " to start")
			(sleep 2) ;; give server time to start
			(if (< count 5)








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	(let ((host     (list-ref hostinfo 0))
	      (iface    (list-ref hostinfo 1))
	      (port     (list-ref hostinfo 2))
	      (pid      (list-ref hostinfo 3)))
	  (debug:print-info 2 "Setting up to connect to " hostinfo)
	  (server:client-connect iface port)) ;; )
	(if (> numtries 0)
	    (let ((exe (car (argv)))
		  (pid #f))
	      (debug:print-info 0 "No server available, attempting to start one...")
	      (set! pid (process-run exe (list "-server" "-" "-debug" (if (list? *verbosity*)
	        							  (string-intersperse *verbosity* ",")
	        							  (conc *verbosity*)))))
	      ;; (set! pid (process-fork (lambda ()
	      ;;   			(current-input-port  (open-input-file  "/dev/null"))
	      ;;   			(current-output-port (open-output-file "/dev/null"))
	      ;;   			(current-error-port  (open-output-file "/dev/null"))
	      ;;   			(server:launch))))
	      (let loop ((count 0))
		(let ((hostinfo (open-run-close tasks:get-best-server tasks:open-db)))
		  (if (not hostinfo)
		      (begin
			(debug:print-info 0 "Waiting for server pid=" pid " to start")
			(sleep 2) ;; give server time to start
			(if (< count 5)
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                          (if sdat sdat
                              (begin
                                (sleep 4)
                                (loop))))))
         (iface       (car server-info))
         (port        (cadr server-info))
         (last-access 0)

	 (spid        (open-run-close tasks:server-get-server-id tasks:open-db #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...
        (open-run-close tasks:server-update-heartbeat tasks:open-db 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)
              (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)))))))

;; all routes though here end in exit ...
(define (server: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 the standalone server")
  (let ((hostinfo (open-run-close tasks:get-best-server tasks:open-db)))

    (if hostinfo
	(debug:print-info 2 "NOT starting new server, one is already running on " (car hostinfo) ":" (cadr hostinfo))
	(if *toppath* 
	    (let* ((th2 (make-thread (lambda ()
				       (server:run 
					(if (args:get-arg "-server")
					    (args:get-arg "-server")








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                          (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 (server: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 the standalone server")
  (let ((hostinfo (open-run-close tasks:get-best-server tasks:open-db)))
    (debug:print 11 "server:launch hostinfo=" hostinfo)
    (if hostinfo
	(debug:print-info 2 "NOT starting new server, one is already running on " (car hostinfo) ":" (cadr hostinfo))
	(if *toppath* 
	    (let* ((th2 (make-thread (lambda ()
				       (server:run 
					(if (args:get-arg "-server")
					    (args:get-arg "-server")
︙︙

Modified tasks.scm from [30537add33] to [7e2c4cdfd8].

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;;======================================================================
;; Server and client management
;;======================================================================

;; state: 'live, 'shutting-down, 'dead
(define (tasks:server-register mdb pid interface port priority state)

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








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;;======================================================================
;; Server and client management
;;======================================================================

;; state: 'live, 'shutting-down, 'dead
(define (tasks:server-register mdb pid interface port priority state)
  (debug:print-info 11 "tasks:server-register " pid " " interface " " port " " priority " " state)
  (sqlite3:execute 
   mdb 
   "INSERT OR REPLACE INTO servers (pid,hostname,port,start_time,priority,state,mt_version,heartbeat,interface)
                             VALUES(?,  ?,       ?, strftime('%s','now'), ?, ?, ?, strftime('%s','now'),?);"
   pid (get-host-name) port priority (conc state) megatest-version interface)
  (list 
   (tasks:server-get-server-id mdb (get-host-name) interface port pid)
︙︙

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