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Comment:Interleaving query enablement, server side coded
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SHA1: 4980ca9f981af54ed0468ee01cb316a88ea50d49
User & Date: matt on 2012-11-12 00:04:43
Other Links: branch diff | manifest | tags
Context
2012-11-12
17:19
Backed out static only build of zmq libs in installall.sh check-in: a74be59f83 user: matt tags: interleaved-queries
00:04
Interleaving query enablement, server side coded check-in: 4980ca9f98 user: matt tags: interleaved-queries
2012-11-06
09:44
Testing ordering of loading zmq, fixes to deploy script check-in: 8c476e8627 user: mrwellan tags: trunk
Changes
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Modified server.scm from [c2beddecc4] to [8e93e2dd1b].

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      (cdb:client-call zsocket 'ping #t)
      (debug:print 4 "server:self-ping - I'm alive on " iface ":" port "!")
      (mutex-lock! *heartbeat-mutex*)
      (set! *server-loop-heart-beat* (current-seconds))
      (mutex-unlock! *heartbeat-mutex*)
      (loop))))
    





(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-socket     #f)

	 (zmq-socket-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)))
	 (actual-port    #f))
    ;; (set! zmq-socket (server:find-free-port-and-open iface zmq-socket 5555 0))
    (set! zmq-socket-dat (server:find-free-port-and-open ipaddrstr zmq-socket (if (args:get-arg "-port")
									      (string->number (args:get-arg "-port"))
									      (+ 5000 (random 1001)))
						     0))




    (set! zmq-socket  (cadr  zmq-socket-dat))


    (set! actual-port (caddr zmq-socket-dat))
    (set! *cache-on* #t)

    ;; (set! th1 (make-thread (lambda ()
    ;;     		     (server:self-ping ipaddrstr actual-port))))
    ;; (thread-start! th1)
    
    ;; 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))
		   (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
    ;;
    (let loop ()
      ;; ;; Ugly yuk. 
      ;; (mutex-lock! *incoming-mutex*)
      ;; (set! *server-loop-heart-beat* (list 'waiting (current-seconds)))
      ;; (mutex-unlock! *incoming-mutex*)
      (let* ((rawmsg (receive-message* zmq-socket))
	     (params (db:string->obj rawmsg)) ;; (with-input-from-string rawmsg (lambda ()(deserialize))))
	     (res    #f))
	;;; Ugly yuk. 
	;; (mutex-lock! *incoming-mutex*)
	;; (set! *server-loop-heart-beat* (list 'working (current-seconds)))
	;; (mutex-unlock! *incoming-mutex*)
	(debug:print-info 12 "server=> received params=" params)
	(set! res (cdb:cached-access params))
	(debug:print-info 12 "server=> processed res=" res)
	(send-message zmq-socket (db:obj->string res))
	(if (not *time-to-exit*)
	    (loop)
	    (begin








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      (cdb:client-call zsocket 'ping #t)
      (debug:print 4 "server:self-ping - I'm alive on " iface ":" port "!")
      (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)
	 (zmq-socket1     #f)
	 (zmq-socket2     #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))))


    (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-socket-dat))
    (set! zmq-socket1  (car   zmq-sdat1))
    (set! p1           (caddr zmq-sdat1))
    
    (set! zmq-sdat2    (cadr  zmq-socket-dat))
    (set! zmq-socket2  (car   zmq-sdat2))
    (set! p2           (caddr zmq-sdat2))

    (set! *cache-on* #t)

    ;; (set! th1 (make-thread (lambda ()
    ;;     		     (server:self-ping ipaddrstr actual-port))))
    ;; (thread-start! th1)
    
    ;; 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
    ;;
    (let loop ()




      (let* ((rawmsg (receive-message* zmq-socket1))
	     (params (db:string->obj rawmsg)) ;; (with-input-from-string rawmsg (lambda ()(deserialize))))
	     (res    #f))




	(debug:print-info 12 "server=> received params=" params)
	(set! res (cdb:cached-access params))
	(debug:print-info 12 "server=> processed res=" res)
	(send-message zmq-socket (db:obj->string res))
	(if (not *time-to-exit*)
	    (loop)
	    (begin
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		(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 #!key (trynum 50))
  (let ((s (if s s (make-socket 'rep)))
	(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")))

     (let ((zmq-url (conc "tcp://" iface ":" p)))
       (print "Trying to start server on " zmq-url)
       (bind-socket s zmq-url)







       (set! *runremote* #f)
       (debug:print 0 "Server started on " zmq-url)
       (mutex-lock! *heartbeat-mutex*)
       (set! *server-info* (open-run-close tasks:server-register tasks:open-db (current-process-id) iface p 0 'live))
       (mutex-unlock! *heartbeat-mutex*)
       (list iface s port)))))

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








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		(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 ipadrstr startport)
  (let* ((s1 (server:find-free-port-and-open ipadrstr #f startport 'pub))
	 (p1 (caddr s1))
	 (s2 (server:find-free-port-and-open ipadrstr #f (+ 1 (if p1 p1 (+ startport 1))) 'pull))
	 (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) iface p 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)))))))
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