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;; [x] [ ] - return results
;; [x] [ ] 6. Add timeout processing
;; [x] [ ] - after 60 seconds
;; [ ] [ ] i. check server alive, connect to new if necessary
;; [ ] [ ] ii. resend request
;; [ ] [ ] 7. Turn self ping back on
(define (nmsg-transport:make-server-url hostport)
(define (nmsg-transport:make-server-url hostport #!key (bindall #f))
(if (not hostport)
#f
(conc "tcp://" (car hostport) ":" (cadr hostport))))
(conc "tcp://" (if bindall "*" (car hostport)) ":" (cadr hostport))))
(define *server-loop-heart-beat* (current-seconds))
(define *heartbeat-mutex* (make-mutex))
;;======================================================================
;; S E R V E R
;;======================================================================
(define-inline (nmsgsock:get-pub dat)(vector-ref dat 0))
(define-inline (nmsgsock:get-pull dat)(vector-ref dat 1))
(define-inline (nmsgsock:set-pub! dat s)(vector-set! dat s 0))
(define-inline (nmsgsock:set-pull! dat s)(vector-set! dat s 0))
hostn)
(if (not *toppath*)
(if (not (launch:setup-for-run))
(begin
"server thread"))
(tdbdat (tasks:open-db)))
(thread-start! server-thread)
(if (nmsg-transport:ping hostn start-port)
(begin
(debug:print 0 "ERROR: cannot find megatest.config, cannot start server, exiting")
(exit))))
(let* ((db (open-db)) ;; here we *do not* want to be opening and closing the db
(nmsg-sdat1 #f)
(nmsg-sdat2 #f)
(pull-socket #f)
(pub-socket #f)
(p1 #f)
(p2 #f)
(nmsg-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! nmsg-sockets-dat (nmsg-transport:setup-ports ipaddrstr (if (args:get-arg "-port")
(string->number (args:get-arg "-port"))
(+ 5000 (random 1001)))))
(set! nmsg-sdat1 (car nmsg-sockets-dat))
(set! pull-socket (cadr nmsg-sdat1)) ;; (iface s port)
(set! p1 (caddr nmsg-sdat1))
(set! nmsg-sdat2 (cadr nmsg-sockets-dat))
(set! pub-socket (cadr nmsg-sdat2))
(set! p2 (caddr nmsg-sdat2))
(set! *cache-on* #t)
(set! *runremote* (vector pull-socket pub-socket)) ;; overloading the use of *runremote* BUG!?
;; what to do when we quit
;;
;; (on-exit (lambda ()
;; (if (and *toppath* *server-info*)
;; (open-run-close tasks:server-deregister-self tasks:open-db (car *server-info*))
;; (let loop ()
;; (let ((queue-len 0))
;; (thread-sleep! (random 5))
;; (mutex-lock! *incoming-mutex*)
;; (set! queue-len (length *incoming-data*))
;; (mutex-unlock! *incoming-mutex*)
;; (if (> queue-len 0)
;; (begin
;; (debug:print-info 0 "Queue not flushed, waiting ...")
;; (loop))))))))
;; The heavy lifting
;;
;; make-vector-record cdb packet client-sig qtype immediate query-sig params qtime
;;
(debug:print-info 11 "Server setup complete, start listening for messages")
(let loop ((queue-lst '()))
(let* ((rawmsg (receive-message* pull-socket))
(packet (db:string->obj rawmsg))
(qtype (cdb:packet-get-qtype packet)))
(debug:print-info 12 "server=> received packet=" packet)
(if (not (member qtype '(sync ping)))
(begin
(mutex-lock! *heartbeat-mutex*)
(set! *last-db-access* (current-seconds))
(mutex-unlock! *heartbeat-mutex*)))
(if #t ;; (cdb:packet-get-immediate packet) ;; process immediately or put in queue
(begin
(db:process-queue-item db packet)
;; (open-run-close db:process-queue #f pub-socket (cons packet queue-lst))
(loop '()))
(loop (cons packet queue-lst)))))))
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;; GET REAL QUEUE LENGTH FROM THE VARIABLE
(let ((queue-len 0)) ;; FOR NOW DO NOT DO THIS (cdb:client-call nmsg-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))
;; (open-run-close tasks:server-update-heartbeat tasks:open-db (car server-info))
;; (if ;; (or (> numrunning 0) ;; stay alive for two days after last access
(mutex-lock! *heartbeat-mutex*)
(set! last-access *last-db-access*)
(mutex-unlock! *heartbeat-mutex*)
(if (> (+ last-access
;; (* 50 60 60) ;; 48 hrs
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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)))))))
;; all routes though here end in exit ...
;;
(define (nmsg-transport:find-free-port-and-open iface s port stype #!key (trynum 50))
(let ((s (if s s (make-socket stype)))
(p (if (number? port) port 5555))
(old-handler (current-exception-handler)))
(define (nmsg-transport:launch run-id)
(let* ((tdbdat (tasks:open-db))
(dbstruct (db:setup run-id))
(hostn (or (args:get-arg "-server") "-")))
(set! *run-id* run-id)
;; with nbfake daemonize isn't really needed
;;
;; (if (args:get-arg "-daemonize")
;; (begin
;; (daemon:ize)
;; (if *alt-log-file* ;; we should re-connect to this port, I think daemon:ize disrupts it
;; (begin
;; (current-error-port *alt-log-file*)
(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)
(nmsg-transport:find-free-port-and-open iface s (+ p 1) trynum: (- trynum 1))
(debug:print-info 0 "Tried ports up to " p
" but all were in use. Please try a different port range by starting the server with parameter \" -port N\" where N is the starting port number to use"))
(exit)) ;; To exit or not? That is the question.
(let ((nmsg-url (conc "tcp://" iface ":" p)))
(debug:print 2 "Trying to start server on " nmsg-url)
(bind-socket s nmsg-url)
(list iface s port)))))
(define (nmsg-transport:setup-ports ipaddrstr startport)
(let* ((s1 (nmsg-transport:find-free-port-and-open ipaddrstr #f startport 'pull))
(p1 (caddr s1))
(s2 (nmsg-transport:find-free-port-and-open ipaddrstr #f (+ 1 (if p1 p1 (+ startport 1))) 'pub))
(p2 (caddr s2)))
(set! *runremote* #f)
(debug:print 0 "Server started on " ipaddrstr " ports " p1 " and " p2)
(mutex-lock! *heartbeat-mutex*)
(set! *server-info* (open-run-close tasks:server-register
tasks:open-db
(current-process-id)
ipaddrstr p1
0
'live
'nmsg
pubport: p2))
(debug:print-info 11 "*server-info* set to " *server-info*)
(mutex-unlock! *heartbeat-mutex*)
(list s1 s2)))
;;======================================================================
;; S E R V E R U T I L I T I E S
;;======================================================================
;;
(define (nmsg-transport:client-socket-connect iface port #!key (context #f)(type 'req)(subscriptions '()))
;;
(define (nmsg-transport:ping hostn port #!key (return-socket #t)(expected-key #f)(our-key #f))
(debug:print-info 3 "client-connect " iface ":" port ", type=" type ", subscriptions=" subscriptions)
(let ((connect-ok #f)
(nmsg-socket (if context
(make-socket type context)
(make-socket type)))
(conurl (nmsg-transport:make-server-url (list iface port))))
(if (socket? nmsg-socket)
(begin
;; first apply subscriptions
(for-each (lambda (subscription)
(debug:print 2 "Subscribing to " subscription)
(socket-option-set! nmsg-socket 'subscribe subscription))
subscriptions)
(connect-socket nmsg-socket conurl)
nmsg-socket)
(begin
(debug:print 0 "ERROR: Failed to open socket to " conurl)
#f))))
(define (nmsg-transport:client-connect iface pullport pubport)
(define (nmsg-transport:client-connect iface portnum)
(let* ((push-socket (nmsg-transport:client-socket-connect iface pullport type: 'push))
(sub-socket (nmsg-transport:client-socket-connect iface pubport
type: 'sub
subscriptions: (list (client:get-signature) "all")))
(nmsg-sockets (vector push-socket sub-socket))
(set! *runremote* nmsg-sockets)
(set! *nm-port* nmsg-sockets)
nmsg-sockets)
(begin
(debug:print-info 2 "Failed to login or connect to " conurl)
(set! *runremote* #f)
#f))))
;; run nmsg-transport:keep-running in a parallel thread to monitor that the db is being
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(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 (nmsg-transport:launch)
(if (not *toppath*)
(if (not (launch:setup-for-run))
(begin
(debug:print 0 "ERROR: cannot find megatest.config, exiting")
(exit))))
(debug:print-info 2 "Starting nmsg server")
(if *toppath*
(let* (;; (th1 (make-thread (lambda ()
;; (let ((server-info #f))
;; ;; wait for the server to be online and available
;; (let loop ()
;; (debug:print-info 2 "Waiting for the server to come online before starting heartbeat")
;; (thread-sleep! 2)
;; (mutex-lock! *heartbeat-mutex*)
;; (set! server-info *server-info* )
;; (mutex-unlock! *heartbeat-mutex*)
;; (if (not server-info)(loop)))
;; (debug:print 2 "Server alive, starting self-ping")
;; (nmsg-transport:self-ping server-info)
;; ))
;; "Self ping"))
(th2 (make-thread (lambda ()
(nmsg-transport:run
(if (args:get-arg "-server")
(args:get-arg "-server")
"-"))) "Server run"))
;; (th3 (make-thread (lambda ()(nmsg-transport:keep-running)) "Keep running"))
)
(set! *client-non-blocking-mode* #t)
;; (thread-start! th1)
(thread-start! th2)
;; (thread-start! th3)
(set! *didsomething* #t)
;; (thread-join! th3)
(thread-join! th2)
)
(debug:print 0 "ERROR: Failed to setup for megatest")))
(define (nmsg-transport:client-launch)
(set-signal-handler! signal/int nmsg-transport:client-signal-handler)
(if (nmsg-transport:client-setup)
(debug:print-info 2 "connected as client")
(begin
(debug:print 0 "ERROR: Failed to connect as client")
(exit))))
;;======================================================================
;; Defunct functions
;;======================================================================
;; ping a server and return number of clients or #f (if no response)
;; NOT IN USE!
(define (nmsg-transport:ping host port #!key (secs 10)(return-socket #f))
(cdb:use-non-blocking-mode
(lambda ()
(let* ((res #f)
(th1 (make-thread
(lambda ()
(let* ((nmsg-context (make-context 1))
(nmsg-socket (nmsg-transport:client-connect host port context: nmsg-context)))
(if nmsg-socket
(if (nmsg-transport:client-login nmsg-socket)
(let ((numclients (cdb:num-clients nmsg-socket)))
(if (not return-socket)
(begin
(nmsg-transport:client-logout nmsg-socket)
(close-socket nmsg-socket)))
(set! res (list #t numclients (if return-socket nmsg-socket #f))))
(begin
;; (close-socket nmsg-socket)
(set! res (list #f "CAN'T LOGIN" #f))))
(set! res (list #f "CAN'T CONNECT" #f)))))
"Ping: th1"))
(th2 (make-thread
(lambda ()
(let loop ((count 1))
(debug:print-info 1 "Ping " count " server on " host " at port " port)
(thread-sleep! 2)
(if (< count (/ secs 2))
(loop (+ count 1))))
;; (thread-terminate! th1)
(set! res (list #f "TIMED OUT" #f)))
"Ping: th2")))
(thread-start! th2)
(thread-start! th1)
(handle-exceptions
exn
(set! res (list #f "TIMED OUT" #f))
(thread-join! th1 secs))
res))))
;; (define (nmsg-transport:self-ping server-info)
;; ;; server-info: server-id interface pullport pubport
;; (let ((iface (list-ref server-info 1))
;; (pullport (list-ref server-info 2))
;; (pubport (list-ref server-info 3)))
;; (nmsg-transport:client-connect iface pullport pubport)
;; (let loop ()
;; (thread-sleep! 2)
;; (cdb:client-call *runremote* 'ping #t)
;; (debug:print 4 "nmsg-transport:self-ping - I'm alive on " iface ":" pullport "/" pubport "!")
;; (mutex-lock! *heartbeat-mutex*)
;; (set! *server-loop-heart-beat* (current-seconds))
;; (mutex-unlock! *heartbeat-mutex*)
;; (loop))))
(define (nmsg-transport:reply pubsock target query-sig success/fail result)
(debug:print-info 11 "nmsg-transport:reply target=" target ", result=" result)
(send-message pubsock target send-more: #t)
(send-message pubsock (db:obj->string (vector success/fail query-sig result))))
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(use json format)
(declare (unit rmt))
(declare (uses api))
(declare (uses tdb))
(declare (uses http-transport))
(declare (uses nmsg-transport))
;;
;; THESE ARE ALL CALLED ON THE CLIENT SIDE!!!
;;
;; ;; For debugging add the following to ~/.megatestrc
;;
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cinfo
;; NB// can cache the answer for server running for 10 seconds ...
;; ;; (and (not (rmt:write-frequency-over-limit? cmd run-id))
(if (tasks:server-running-or-starting? (db:delay-if-busy (tasks:open-db)) run-id)
(client:setup run-id)
#f))))
;; cmd is a symbol
;; vars is a json string encoding the parameters for the call
;;
(let* ((dat (http-transport:client-api-send-receive run-id connection-info cmd jparams))
((http)(http-transport:client-api-send-receive run-id connection-info cmd jparams))
((nm) (nm-transport:client-api-send-receive run-id connection-info cmd jparams))
(else (exit))))
(res (if (vector? dat) (vector-ref dat 1) #f))
(success (if (vector? dat) (vector-ref dat 0) #f)))
(http-transport:server-dat-update-last-access connection-info)
(if success
(db:string->obj res)
;; (if (< attemptnum 100)
;; (begin
;; (hash-table-delete! *runremote* run-id)
;; (thread-sleep! 0.5)
;; (rmt:send-receive cmd rid params attempnum: (+ attemptnum 1)))
;; (begin
;; (print-call-chain (current-error-port))
;; (debug:print 0 "ERROR: too many attempts to communicate have failed. Giving up. Kill your mtest processes and start over")
;; (exit 1)))))
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