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;;======================================================================
;; Call this to start the actual server
;;
(define *db:process-queue-mutex* (make-mutex))
(define (http-transport:run hostn run-id server-id)
(debug:print 2 *default-log-port* "Attempting to start the server ...")
(let* ((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))) ".")
(server:get-best-guess-address hostname)
#f)))
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;;======================================================================
;; Call this to start the actual server
;;
(define *db:process-queue-mutex* (make-mutex))
(define (http-transport:run hostn)
(debug:print 2 *default-log-port* "Attempting to start the server ...")
(let* ((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))) ".")
(server:get-best-guess-address hostname)
#f)))
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(send-response body: "hey there!\n"
headers: '((content-type text/plain))))
((equal? (uri-path (request-uri (current-request)))
'(/ "hey"))
(send-response body: "hey there!\n"
headers: '((content-type text/plain))))
(else (continue))))))))
(http-transport:try-start-server run-id ipaddrstr start-port server-id)))
;; This is recursively run by http-transport:run until sucessful
;;
(define (http-transport:try-start-server run-id ipaddrstr portnum server-id)
(let ((config-hostname (configf:lookup *configdat* "server" "hostname"))
(tdbdat (tasks:open-db)))
(debug:print-info 0 *default-log-port* "http-transport:try-start-server time=" (seconds->time-string (current-seconds)) " run-id=" run-id " ipaddrsstr=" ipaddrstr " portnum=" portnum " server-id=" server-id " config-hostname=" config-hostname)
(handle-exceptions
exn
(begin
(print-error-message exn)
(if (< portnum 64000)
(begin
(debug:print 0 *default-log-port* "WARNING: attempt to start server failed. Trying again ...")
(debug:print 0 *default-log-port* " message: " ((condition-property-accessor 'exn 'message) exn))
(debug:print 0 *default-log-port* "exn=" (condition->list exn))
(portlogger:open-run-close portlogger:set-failed portnum)
(debug:print 0 *default-log-port* "WARNING: failed to start on portnum: " portnum ", trying next port")
(thread-sleep! 0.1)
;; get_next_port goes here
(http-transport:try-start-server run-id
ipaddrstr
(portlogger:open-run-close portlogger:find-port)
server-id))
(begin
(tasks:server-force-clean-run-record (db:delay-if-busy tdbdat) run-id ipaddrstr portnum " http-transport:try-start-server")
(tasks:server-set-interface-port
(db:delay-if-busy tdbdat)
server-id
ipaddrstr portnum)
;; (portlogger:open-run-close portlogger:set-port portnum "released")
(tasks:server-force-clean-run-record (db:delay-if-busy tdbdat) run-id ipaddrstr portnum " http-transport:try-start-server")
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(send-response body: "hey there!\n"
headers: '((content-type text/plain))))
((equal? (uri-path (request-uri (current-request)))
'(/ "hey"))
(send-response body: "hey there!\n"
headers: '((content-type text/plain))))
(else (continue))))))))
(http-transport:try-start-server ipaddrstr start-port)))
;; This is recursively run by http-transport:run until sucessful
;;
(define (http-transport:try-start-server ipaddrstr portnum)
(let ((config-hostname (configf:lookup *configdat* "server" "hostname")))
(debug:print-info 0 *default-log-port* "http-transport:try-start-server time=" (seconds->time-string (current-seconds)) " ipaddrsstr=" ipaddrstr " portnum=" portnum " config-hostname=" config-hostname)
(handle-exceptions
exn
(begin
(print-error-message exn)
(if (< portnum 64000)
(begin
(debug:print 0 *default-log-port* "WARNING: attempt to start server failed. Trying again ...")
(debug:print 0 *default-log-port* " message: " ((condition-property-accessor 'exn 'message) exn))
(debug:print 0 *default-log-port* "exn=" (condition->list exn))
(portlogger:open-run-close portlogger:set-failed portnum)
(debug:print 0 *default-log-port* "WARNING: failed to start on portnum: " portnum ", trying next port")
(thread-sleep! 0.1)
;; get_next_port goes here
(http-transport:try-start-server ipaddrstr
(portlogger:open-run-close portlogger:find-port)))
(begin
(print "ERROR: Tried and tried but could not start the server"))))
;; any error in following steps will result in a retry
(set! *server-info* (list ipaddrstr portnum))
(debug:print 0 *default-log-port* "INFO: Trying to start server on " ipaddrstr ":" portnum)
;; This starts the spiffy server
;; NEED WAY TO SET IP TO #f TO BIND ALL
;; (start-server bind-address: ipaddrstr port: portnum)
(if config-hostname ;; this is a hint to bind directly
(start-server port: portnum bind-address: (if (equal? config-hostname "-")
ipaddrstr
config-hostname))
(start-server port: portnum))
(portlogger:open-run-close portlogger:set-port portnum "released")
(debug:print 1 *default-log-port* "INFO: server has been stopped"))))
;;======================================================================
;; S E R V E R U T I L I T I E S
;;======================================================================
;;======================================================================
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(api-req (make-request method: 'POST uri: api-uri))
(server-dat (vector iface port api-uri api-url api-req (current-seconds))))
server-dat))
;; run http-transport:keep-running in a parallel thread to monitor that the db is being
;; used and to shutdown after sometime if it is not.
;;
(define (http-transport:keep-running server-id run-id)
;; if none running or if > 20 seconds since
;; server last used then start shutdown
;; This thread waits for the server to come alive
(debug:print-info 0 *default-log-port* "Starting the sync-back, keep alive thread in server for run-id=" run-id)
(let* ((tdbdat (tasks:open-db))
(server-start-time (current-seconds))
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(api-req (make-request method: 'POST uri: api-uri))
(server-dat (vector iface port api-uri api-url api-req (current-seconds))))
server-dat))
;; run http-transport:keep-running in a parallel thread to monitor that the db is being
;; used and to shutdown after sometime if it is not.
;;
(define (http-transport:keep-running)
;; if none running or if > 20 seconds since
;; server last used then start shutdown
;; This thread waits for the server to come alive
(debug:print-info 0 *default-log-port* "Starting the sync-back, keep alive thread in server for run-id=" run-id)
(let* ((server-start-time (current-seconds))
(server-info (let loop ((start-time (current-seconds))
(changed #t)
(last-sdat "not this"))
(let ((sdat #f))
(thread-sleep! 0.01)
(debug:print-info 0 *default-log-port* "Waiting for server alive signature")
(mutex-lock! *heartbeat-mutex*)
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sdat)
(begin
(debug:print-info 0 *default-log-port* "Still waiting, last-sdat=" last-sdat)
(sleep 4)
(if (> (- (current-seconds) start-time) 120) ;; been waiting for two minutes
(begin
(debug:print-error 0 *default-log-port* "transport appears to have died, exiting server " server-id " for run " run-id)
(tasks:server-delete-record (db:delay-if-busy tdbdat) server-id "failed to start, never received server alive signature")
(exit))
(loop start-time
(equal? sdat last-sdat)
sdat)))))))
(iface (car server-info))
(port (cadr server-info))
(last-access 0)
(server-timeout (server:get-timeout))
(server-going #f))
(let loop ((count 0)
(server-state 'available)
(bad-sync-count 0)
(start-time (current-milliseconds)))
;;(BB> "http-transport: top of loop; count="count" server-state="server-state" bad-sync-count="bad-sync-count" server-going="server-going)
;; Removed code is pasted below (keeping it around until we are clear it is not needed).
;; no *dbstruct-db* yet, set running after our first pass through and start the db
(if (eq? server-state 'available)
(let ((new-server-id (tasks:server-am-i-the-server? (db:delay-if-busy tdbdat) run-id))) ;; try to ensure no double registering of servers
(if (equal? new-server-id server-id)
(begin
(tasks:server-set-state! (db:delay-if-busy tdbdat) server-id "dbprep")
;;(BB> "http-transport: ->dbprep")
(thread-sleep! 0.5) ;; give some margin for queries to complete before switching from file based access to server based access
(set! *dbstruct-db* (db:setup)) ;; run-id))
(set! server-going #t)
(tasks:server-set-state! (db:delay-if-busy tdbdat) server-id "running")
;;(BB> "http-transport: ->running")
(server:write-dotserver *toppath* iface port (current-process-id) 'http)
(thread-start! *watchdog*)
(server:complete-attempt *toppath*))
(begin ;; gotta exit nicely
;;(BB> "http-transport: ->collision")
(tasks:server-set-state! (db:delay-if-busy tdbdat) server-id "collision")
(http-transport:server-shutdown server-id port))))))
(begin
(debug:print-info 0 *default-log-port* "interface changed, refreshing iface and port info")
(set! iface (car sdat))
(set! port (cadr sdat))
(server:write-dotserver *toppath* iface port (current-process-id) 'http)))
;; Transfer *db-last-access* to last-access to use in checking that we are still alive
(mutex-lock! *heartbeat-mutex*)
(set! last-access *db-last-access*)
(mutex-unlock! *heartbeat-mutex*)
;; (debug:print 11 *default-log-port* "last-access=" last-access ", server-timeout=" server-timeout)
;;
;; no_traffic, no running tests, if server 0, no running servers
;;
;; (let ((wait-on-running (configf:lookup *configdat* "server" b"wait-on-running"))) ;; wait on running tasks (if not true then exit on time out)
;;
((not (server:confirm-dotserver *toppath* iface port (current-process-id) 'http))
(debug:print-info 0 *default-log-port* "Server .server file does not exist or contents do not match. Initiate server shutdown.")
(http-transport:server-shutdown server-id port))
;;
;; Consider implementing some smarts here to re-insert the record or kill self is
;; the db indicates so
;;
;; (if (tasks:server-am-i-the-server? tdb run-id)
;; (tasks:server-set-state! tdb server-id "running"))
;;
;; code cut out from above
;;
;; (condition-case
;; ;; (if (and (member (mutex-state *db-sync-mutex*) '(abandoned not-abandoned))
;; ;; (> (- (current-seconds) *db-last-sync*) 5)) ;; if not currently being synced nor recently synced
;; (db:sync-touched *dbstruct-db* *run-id* force-sync: #t) ;; usually done in the watchdog, not here.
;; ((sync-failed)(cond
;; ((> bad-sync-count 10) ;; time to give up
;; (http-transport:server-shutdown server-id port))
;; (else ;; (> bad-sync-count 0) ;; we've had a fail or two, delay and loop
;; (thread-sleep! 5)
;; (loop count server-state (+ bad-sync-count 1)))))
;; ((exn)
;; (debug:print-error 0 *default-log-port* "error from sync code other than 'sync-failed. Attempting to gracefully shutdown the server")
;; (tasks:server-delete-record (db:delay-if-busy tdbdat) server-id " http-transport:keep-running crashed")
;; (exit)))
;; (set! sync-time (- (current-milliseconds) start-time))
;; (set! rem-time (quotient (- 4000 sync-time) 1000))
;; (debug:print 4 *default-log-port* "SYNC: time= " sync-time ", rem-time=" rem-time)
;;
;; (if (and (<= rem-time 4)
;; (> rem-time 0))
;; (thread-sleep! rem-time)
;; (thread-sleep! 4))) ;; fallback for if the math is changed ...
(tasks:server-set-state! (db:delay-if-busy tdbdat) server-id "shutting-down")
(set! *time-to-exit* #t) ;; tell on-exit to be fast as we've already cleaned up
(portlogger:open-run-close portlogger:set-port port "released")
(thread-sleep! 5)
;; (debug:print-info 0 *default-log-port* "Max cached queries was " *max-cache-size*)
;; (debug:print-info 0 *default-log-port* "Number of cached writes " *number-of-writes*)
;; (debug:print-info 0 *default-log-port* "Average cached write time "
;; (if (eq? *number-of-writes* 0)
;; "n/a (no writes)"
;; (/ *writes-total-delay*
;; *number-of-writes*))
;; " ms")
;; (debug:print-info 0 *default-log-port* "Number non-cached queries " *number-non-write-queries*)
;; (debug:print-info 0 *default-log-port* "Average non-cached time "
;; (if (eq? *number-non-write-queries* 0)
;; "n/a (no queries)"
;; (/ *total-non-write-delay*
;; *number-non-write-queries*))
;; " ms")
(db:print-current-query-stats)
(debug:print-info 0 *default-log-port* "Server shutdown complete. Exiting")
(tasks:server-delete-record (db:delay-if-busy tdbdat) server-id " http-transport:keep-running complete")
;; if the .server file contained :myport then we can remove it
(server:remove-dotserver-file *toppath* port)
;;(BB> "http-transport:server-shutdown -> exit")
(exit)))
;; all routes though here end in exit ...
;;
;; start_server?
;;
(define (http-transport:launch run-id)
(server:attempting-start *toppath*)
(let* ((tdbdat (tasks:open-db)))
(set! *run-id* run-id)
(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*)
(current-output-port *alt-log-file*)))))
(if (and (server:read-dotserver *toppath*)
(server:check-if-running run-id))
(begin
(debug:print 0 *default-log-port* "INFO: Server for run-id " run-id " already running")
(exit 0))
(begin ;; ok, no server detected, clean out any lingering records
(tasks:server-force-clean-running-records-for-run-id (db:delay-if-busy tdbdat) run-id "notresponding")))
(let loop ((server-id (tasks:server-lock-slot (db:delay-if-busy tdbdat) run-id))
(remtries 4))
(if (not server-id)
(if (> remtries 0)
(begin
(thread-sleep! 2)
(loop (tasks:server-lock-slot (db:delay-if-busy tdbdat) run-id)
(- remtries 1)))
(begin
;; since we didn't get the server lock we are going to clean up and bail out
(debug:print-info 2 *default-log-port* "INFO: server pid=" (current-process-id) ", hostname=" (get-host-name) " not starting due to other candidates ahead in start queue")
(tasks:server-delete-records-for-this-pid (db:delay-if-busy tdbdat) " http-transport:launch")
(server:complete-attempt *toppath*)
))
(let* ((th2 (make-thread (lambda ()
(debug:print-info 0 *default-log-port* "Server run thread started")
(http-transport:run
(if (args:get-arg "-server")
(args:get-arg "-server")
"-")
run-id
server-id)) "Server run"))
(th3 (make-thread (lambda ()
(debug:print-info 0 *default-log-port* "Server monitor thread started")
(http-transport:keep-running server-id run-id))
"Keep running")))
(thread-start! th2)
(thread-sleep! 0.25) ;; give the server time to settle before starting the keep-running monitor.
(thread-start! th3)
(set! *didsomething* #t)
(thread-join! th2)
(exit))))))
;; (define (http:ping run-id host-port)
;; (let* ((server-dat (http-transport:client-connect (car host-port)(cadr host-port)))
;; (login-res (rmt:login-no-auto-client-setup server-dat run-id)))
;; (if (and (list? login-res)
;; (car login-res))
;; (begin
;; (print "LOGIN_OK")
;; (exit 0))
;; (begin
;; (print "LOGIN_FAILED")
;; (exit 1)))))
(define (http-transport:server-signal-handler signum)
(signal-mask! signum)
(handle-exceptions
exn
(debug:print 0 *default-log-port* " ... exiting ...")
(let ((th1 (make-thread (lambda ()
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sdat)
(begin
(debug:print-info 0 *default-log-port* "Still waiting, last-sdat=" last-sdat)
(sleep 4)
(if (> (- (current-seconds) start-time) 120) ;; been waiting for two minutes
(begin
(debug:print-error 0 *default-log-port* "transport appears to have died, exiting server " server-id " for run " run-id)
;; (tasks:server-delete-record (db:delay-if-busy tdbdat) server-id "failed to start, never received server alive signature")
(exit))
(loop start-time
(equal? sdat last-sdat)
sdat)))))))
(iface (car server-info))
(port (cadr server-info))
(last-access 0)
(server-timeout (server:get-timeout))
(server-going #f))
(let loop ((count 0)
(server-state 'available)
(bad-sync-count 0)
(start-time (current-milliseconds)))
;; Use this opportunity to sync the tmp db to megatest.db
(if (not server-going) ;; *dbstruct-db*
(begin
(debug:print 0 *default-log-port* "SERVER: dbprep")
(set! *dbstruct-db* (db:setup)) ;; run-id))
(set! server-going #t)
(debug:print 0 *default-log-port* "SERVER: running") ;; NOTE: the server is NOT yet marked as running in the log. We do that in the keep-running routine.
(thread-start! *watchdog*)))
;; when things go wrong we don't want to be doing the various queries too often
;; so we strive to run this stuff only every four seconds or so.
(let* ((sync-time (- (current-milliseconds) start-time))
(rem-time (quotient (- 4000 sync-time) 1000)))
(if (and (<= rem-time 4)
(> rem-time 0))
(thread-sleep! rem-time)))
(if (< count 1) ;; 3x3 = 9 secs aprox
(loop (+ count 1) 'running bad-sync-count (current-milliseconds)))
;; Check that iface and port have not changed (can happen if server port collides)
(mutex-lock! *heartbeat-mutex*)
(set! sdat *server-info*)
(mutex-unlock! *heartbeat-mutex*)
(if (or (not (equal? sdat (list iface port)))
(not server-id))
(let ((new-iface (car sdat))
(new-port (cadr sdat)))
(debug:print-info 0 *default-log-port* "WARNING: interface changed, refreshing iface and port info")
(set! iface new-iface)
(set! port new-port)
(debug:print 0 *default-log-port* "SERVER STARTED: " iface ":" port " " (current-seconds))))
;; Transfer *db-last-access* to last-access to use in checking that we are still alive
(mutex-lock! *heartbeat-mutex*)
(set! last-access *db-last-access*)
(mutex-unlock! *heartbeat-mutex*)
(if (common:low-noise-print 120 (conc "server running on " iface ":" port))
(debug:print-info 0 *default-log-port* "SERVER STARTED: " iface ":" port " " (current-seconds)))
(let* ((hrs-since-start (/ (- (current-seconds) server-start-time) 3600))
(adjusted-timeout (if (> hrs-since-start 1)
(- server-timeout (inexact->exact (round (* hrs-since-start 60)))) ;; subtract 60 seconds per hour
server-timeout)))
(if (common:low-noise-print 120 "server timeout")
(debug:print-info 0 *default-log-port* "Adjusted server timeout: " adjusted-timeout))
(cond
((and *server-run*
(> (+ last-access server-timeout)
(current-seconds)))
(if (common:low-noise-print 120 "server continuing")
(debug:print-info 0 *default-log-port* "Server continuing, seconds since last db access: " (- (current-seconds) last-access)))
(loop 0 server-state bad-sync-count (current-milliseconds)))
(else
(debug:print-info 0 *default-log-port* "Server timeed out. seconds since last db access: " (- (current-seconds) last-access))
(http-transport:server-shutdown server-id port)))))))
(define (http-transport:server-shutdown server-id port)
(let ((tdbdat (tasks:open-db)))
;;(BB> "http-transport:server-shutdown called")
(debug:print-info 0 *default-log-port* "Starting to shutdown the server. pid="(current-process-id))
;;
;; start_shutdown
;;
;; (tasks:server-set-state! (db:delay-if-busy tdbdat) server-id "shutting-down")
(set! *time-to-exit* #t) ;; tell on-exit to be fast as we've already cleaned up
(portlogger:open-run-close portlogger:set-port port "released")
(thread-sleep! 1)
;; (debug:print-info 0 *default-log-port* "Max cached queries was " *max-cache-size*)
;; (debug:print-info 0 *default-log-port* "Number of cached writes " *number-of-writes*)
;; (debug:print-info 0 *default-log-port* "Average cached write time "
;; (if (eq? *number-of-writes* 0)
;; "n/a (no writes)"
;; (/ *writes-total-delay*
;; *number-of-writes*))
;; " ms")
;; (debug:print-info 0 *default-log-port* "Number non-cached queries " *number-non-write-queries*)
;; (debug:print-info 0 *default-log-port* "Average non-cached time "
;; (if (eq? *number-non-write-queries* 0)
;; "n/a (no queries)"
;; (/ *total-non-write-delay*
;; *number-non-write-queries*))
;; " ms")
(db:print-current-query-stats)
(debug:print-info 0 *default-log-port* "Server shutdown complete. Exiting")
;; (tasks:server-delete-record (db:delay-if-busy tdbdat) server-id " http-transport:keep-running complete")
;; if the .server file contained :myport then we can remove it
;; (server:remove-dotserver-file *toppath* port)
;;(BB> "http-transport:server-shutdown -> exit")
(exit)))
;; all routes though here end in exit ...
;;
;; start_server?
;;
(define (http-transport:launch)
(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*)
(current-output-port *alt-log-file*)))))
(let* ((th2 (make-thread (lambda ()
(debug:print-info 0 *default-log-port* "Server run thread started")
(http-transport:run
(if (args:get-arg "-server")
(args:get-arg "-server")
"-")
)) "Server run"))
(th3 (make-thread (lambda ()
(debug:print-info 0 *default-log-port* "Server monitor thread started")
(http-transport:keep-running)
"Keep running"))))
(thread-start! th2)
(thread-sleep! 0.25) ;; give the server time to settle before starting the keep-running monitor.
(thread-start! th3)
(set! *didsomething* #t)
(thread-join! th2)
(exit)))
(define (http-transport:server-signal-handler signum)
(signal-mask! signum)
(handle-exceptions
exn
(debug:print 0 *default-log-port* " ... exiting ...")
(let ((th1 (make-thread (lambda ()
|