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(declare (unit server))
(declare (uses common))
(declare (uses db))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.
(declare (uses synchash))
(declare (uses http-transport))
(declare (uses launch))
;; (declare (uses zmq-transport))
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(declare (unit server))
(declare (uses common))
(declare (uses db))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.
(declare (uses synchash))
(declare (uses http-transport))
(declare (uses rpc-transport))
(declare (uses nmsg-transport))
(declare (uses launch))
(declare (uses daemon))
(include "common_records.scm")
(include "db_records.scm")
(define (server:make-server-url hostport)
(if (not hostport)
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;;
;; all routes though here end in exit ...
;;
;; start_server
;;
(define (server:launch run-id)
(http-transport:launch run-id))
;;======================================================================
;; Q U E U E M A N A G E M E N T
;;======================================================================
;; We don't want to flush the queue if it was just flushed
(define *server:last-write-flush* (current-milliseconds))
;;======================================================================
;; S E R V E R U T I L I T I E S
;;======================================================================
;; Generate a unique signature for this server
(define (server:mk-signature)
(message-digest-string (md5-primitive)
(with-output-to-string
(lambda ()
(write (list (current-directory)
(argv)))))))
(db:obj->string (vector success/fail query-sig result)))
;; Given a run id start a server process ### NOTE ### > file 2>&1
;; if the run-id is zero and the target-host is set
;; try running on that host
;;
(define (server:run run-id)
(let* ((curr-host (get-host-name))
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;;
;; all routes though here end in exit ...
;;
;; start_server
;;
(define (server:launch run-id)
(case *transport-type*
((http)(http-transport:launch run-id))
((nmsg)(nmsg-transport:launch run-id))
((rpc) (rpc-transport:launch run-id))
(else (debug:print 0 "ERROR: unknown server type " *transport-type*))))
;; (else (debug:print 0 "ERROR: No known transport set, transport=" transport ", using rpc")
;; (rpc-transport:launch run-id)))))
;;======================================================================
;; S E R V E R U T I L I T I E S
;;======================================================================
;; Get the transport
(define (server:get-transport)
(if *transport-type*
*transport-type*
(let ((ttype (string->symbol
(or (args:get-arg "-transport")
(configf:lookup *configdat* "server" "transport")
"rpc"))))
(set! *transport-type* ttype)
ttype)))
;; Generate a unique signature for this server
(define (server:mk-signature)
(message-digest-string (md5-primitive)
(with-output-to-string
(lambda ()
(write (list (current-directory)
(argv)))))))
;; 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
(case (server:get-transport)
((rpc) (db:obj->string (vector success/fail query-sig result)))
((http) (db:obj->string (vector success/fail query-sig result)))
((zmq)
(let ((pub-socket (vector-ref *runremote* 1)))
(send-message pub-socket return-addr send-more: #t)
(send-message pub-socket (db:obj->string (vector success/fail query-sig result)))))
((fs) result)
(else
(debug:print 0 "ERROR: unrecognised transport type: " *transport-type*)
result)))
;; Given a run id start a server process ### NOTE ### > file 2>&1
;; if the run-id is zero and the target-host is set
;; try running on that host
;;
(define (server:run run-id)
(let* ((curr-host (get-host-name))
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(setenv "TARGETHOST" target-host)))
(setenv "TARGETHOST_LOGF" logfile)
(system (conc "nbfake " cmdln))
(unsetenv "TARGETHOST_LOGF")
(if (get-environment-variable "TARGETHOST")(unsetenv "TARGETHOST"))
;; (system cmdln)
(pop-directory)))
;; kind start up of servers, wait 40 seconds before allowing another server for a given
;; run-id to be launched
(define (server:kind-run run-id)
(let ((last-run-time (hash-table-ref/default *server-kind-run* run-id #f)))
(if (or (not last-run-time)
(> (- (current-seconds) last-run-time) 30))
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(setenv "TARGETHOST" target-host)))
(setenv "TARGETHOST_LOGF" logfile)
(system (conc "nbfake " cmdln))
(unsetenv "TARGETHOST_LOGF")
(if (get-environment-variable "TARGETHOST")(unsetenv "TARGETHOST"))
;; (system cmdln)
(pop-directory)))
(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*)))
;; kind start up of servers, wait 40 seconds before allowing another server for a given
;; run-id to be launched
(define (server:kind-run run-id)
(let ((last-run-time (hash-table-ref/default *server-kind-run* run-id #f)))
(if (or (not last-run-time)
(> (- (current-seconds) last-run-time) 30))
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(trycount 0))
(if server
;; note: client:start will set *runremote*. this needs to be changed
;; also, client:start will login to the server, also need to change that.
;;
;; client:start returns #t if login was successful.
;;
(let ((res (server:ping-server run-id
(tasks:hostinfo-get-interface server)
(tasks:hostinfo-get-port server))))
;; if the server didn't respond we must remove the record
(if res
#t
(begin
(debug:print-info 0 "server at " server " not responding, removing record")
(tasks:server-force-clean-running-records-for-run-id (db:delay-if-busy tdbdat) run-id
" server:check-if-running")
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(trycount 0))
(if server
;; note: client:start will set *runremote*. this needs to be changed
;; also, client:start will login to the server, also need to change that.
;;
;; client:start returns #t if login was successful.
;;
(let ((res (case *transport-type*
((http)(server:ping-server run-id
(tasks:hostinfo-get-interface server)
(tasks:hostinfo-get-port server)))
((nmsg)(nmsg-transport:ping (tasks:hostinfo-get-interface server)
(tasks:hostinfo-get-port server)
timeout: 2)))))
;; if the server didn't respond we must remove the record
(if res
#t
(begin
(debug:print-info 0 "server at " server " not responding, removing record")
(tasks:server-force-clean-running-records-for-run-id (db:delay-if-busy tdbdat) run-id
" server:check-if-running")
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(res "NOREPLY"))
(if (eof-object? inl)
(case (string->symbol res)
((NOREPLY) #f)
((LOGIN_OK) #t)
(else #f))
(loop (read-line) inl))))))
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(res "NOREPLY"))
(if (eof-object? inl)
(case (string->symbol res)
((NOREPLY) #f)
((LOGIN_OK) #t)
(else #f))
(loop (read-line) inl))))))
(define (server:login toppath)
(lambda (toppath)
(set! *last-db-access* (current-seconds))
(if (equal? *toppath* toppath)
(begin
;; (debug:print-info 2 "login successful")
#t)
(begin
;; (debug:print-info 2 "login failed")
#f))))
(define (server:get-timeout)
(let ((tmo (configf:lookup *configdat* "server" "timeout")))
(if (and (string? tmo)
(string->number tmo))
(* 60 60 (string->number tmo))
;; (* 3 24 60 60) ;; default to three days
(* 60 1) ;; default to one minute
;; (* 60 60 25) ;; default to 25 hours
)))
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