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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))
(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))
;;; Ugly yuk.
;; (mutex-lock! *incoming-mutex*)
;; (set! *server-loop-heart-beat* (list 'working (current-seconds)))
;; (mutex-unlock! *incoming-mutex*)
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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)))))
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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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