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|
(declare (uses common))
(declare (uses db))
(declare (uses tests))
(declare (uses tasks)) ;; tasks are where stuff is maintained about what is running.
(include "common_records.scm")
(include "db_records.scm")
(define *heartbeat-mutex* (make-mutex))
(define *server-loop-heart-beat* (current-seconds))
;; procstr is the name of the procedure to be called as a string
(define (rpc-transport:autoremote procstr params)
(handle-exceptions
exn
(begin
(debug:print 1 *default-log-port* "Remote failed for " proc " " params)
(apply (eval (string->symbol procstr)) params))
;; (if *runremote*
;; (apply (eval (string->symbol (conc "remote:" procstr))) params)
(apply (eval (string->symbol procstr)) params)))
;; retry an operation (depends on srfi-18)
(define (retry-thunk the-thunk #!key (accept-result? (lambda (x) x)) (retries 4) (wait-seconds-between-tries 0.2) (failure-value #f))
(let loop ((res (the-thunk)) (retries-left retries))
(cond
((accept-result? res) res)
((> retries-left 0)
(thread-sleep! wait-seconds-between-tries)
(loop (the-thunk) (sub1 retries-left)))
(else failure-value))))
(define (rpc-transport:server-shutdown server-id rpc:listener #!key (from-on-exit #f))
(BB> "rpc-transport:server-shutdown entered.")
(on-exit (lambda () #t)) ;; turn off on-exit stuff
;;(tcp-close rpc:listener) ;; gotta exit nicely
;;(tasks:bb-server-set-state! server-id "stopped")
;; TODO: (low) the following is extraordinaritly slow. Maybe we don't even need portlogger for rpc anyway?? the exception-based failover when ports are taken is fast!
;;(BB> "before plog rel")
;;(portlogger:open-run-close portlogger:set-port (rpc:default-server-port) "released")
(set! *time-to-exit* #t)
(BB> "before db:sync-touched")
(if *inmemdb* (db:sync-touched *inmemdb* *run-id* force-sync: #t))
(BB> "before bb-server-delete-record")
(tasks:bb-server-delete-record server-id " rpc-transport:keep-running complete")
(BB> "Before (exit)")
(unless from-on-exit (exit))
)
;; all routes though here end in exit ...
;;
;; start_server?
;;
(define (rpc-transport:launch run-id)
(let* ((tdbdat (tasks:open-db)))
(BB> "rpc-transport:launch fired for run-id="run-id)
(set! *run-id* run-id)
(if (args:get-arg "-daemonize")
(daemon:ize))
(if (server:check-if-running run-id)
(begin
(debug:print 0 *default-log-port* "INFO: Server for run-id " run-id " already running")
(exit 0)))
(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) " rpc-transport:launch")))
(begin
(rpc-transport:run (if (args:get-arg "-server")(args:get-arg "-server") "-") run-id server-id)
(exit))))))
(rpc:publish-procedure! 'server:login server:login)
(rpc:publish-procedure! 'testing (lambda () "Just testing"))
(rpc:publish-procedure!
'testing
(lambda ()
(BB> "Current-peer=["(rpc:current-peer)"]")
(BB> "published rpc proc 'testing was invoked")
"Just testing"))
;; procedure to receive arbitrary API request from client's rpc:send-receive/rpc-transport:client-api-send-receive
(rpc:publish-procedure! 'rpc-transport:autoremote rpc-transport:autoremote)
;; can use this to run most anything at the remote
(rpc:publish-procedure!
'remote:run
(lambda (procstr . params)
(server:autoremote procstr params)))
;;======================================================================
;; end of publish-procedure section
;;======================================================================
(BB> "flag1")
(let* ((db #f)
(hostname (get-host-name))
(ipaddrstr (let ((ipstr (if (string=? "-" hostn)
(hostname (let ((res (get-host-name))) (BB> "hostname="res) res))
(server-start-time (current-seconds))
(server-timeout (server:get-timeout))
(ipaddrstr (let* ((ipstr (if (string=? "-" hostn)
;; (string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
(server:get-best-guess-address hostname)
#f)))
(if ipstr ipstr hostn))) ;; hostname)))
(start-port (open-run-close tasks:server-get-next-port tasks:open-db))
#f))
(res (if ipstr ipstr hostn)))
(BB> "ipaddrstr="res)
res)) ;; hostname)))
(start-port (let ((res (portlogger:open-run-close portlogger:find-port))) (BB> "start-port="res) res))
(link-tree-path (configf:lookup *configdat* "setup" "linktree"))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; rpc:listener is the tcp-listen result from inside the find-free-port-and-open complex.
;; It is our handle on the listening tcp port
;; We will attach this to our rpc server with rpc:make-server in thread th1 .
(rpc:listener (rpc-transport:find-free-port-and-open (rpc:default-server-port)))
(rpc:listener (rpc-transport:find-free-port-and-open start-port))
(th1 (make-thread
(lambda ()
(BB> "+++ before rpc:make-server "rpc:listener)
;;(cute (rpc:make-server rpc:listener) "rpc:server")
((rpc:make-server rpc:listener) #t))
((rpc:make-server rpc:listener) #t)
(BB> "--- after rpc:make-server"))
"rpc:server"))
;; (cute (rpc:make-server rpc:listener) "rpc:server")
;; 'rpc:server))
(hostname (if (string=? "-" hostn)
(portnum (rpc:default-server-port))
(host:port (conc (if ipaddrstr ipaddrstr hostname) ":" portnum))
(tdb (tasks:open-db)))
(portnum (let ((res (rpc:default-server-port))) (BB> "rpc:default-server-port="res" rpc-listener-port="*rpc-listener-port*) res))
(host:port (conc (if ipaddrstr ipaddrstr hostname) ":" portnum)))
;; if rpc found it needed a different port than portlogger provided, keep portlogger in the loop.
;; (when (not (equal? start-port portnum))
;; (BB> "portlogger proffered "start-port" but rpc grabbed "portnum)
;; (portlogger:open-run-close portlogger:set-port start-port "released")
;; (portlogger:open-run-close portlogger:take-port portnum))
(tasks:bb-server-set-interface-port server-id ipaddrstr portnum)
;;============================================================
;; activate thread th1 to attach opened tcp port to rpc server
;;=============================================================
(BB> "Got here before thread start of rpc listener")
(thread-start! th1)
(BB> "started rpc server thread th1="th1)
(set! db *inmemdb*)
(open-run-close tasks:server-set-interface-port
tasks:open-db
server-id
ipaddrstr portnum)
;; (trace rpc:publish-procedure!)
;; (rpc:publish-procedure! 'server:login server:login)
;; (rpc:publish-procedure! 'testing (lambda () "Just testing"))
;;======================================================================
;; ;; end of publish-procedure section
;;======================================================================
;;
(open-run-close tasks:server-set-state! tasks:open-db server-id "stopped")))
(set! *rpc:listener* rpc:listener)
(tasks:server-set-state! tdb server-id "running")
(set! *inmemdb* (db:setup run-id))
;; if none running or if > 20 seconds since
;; server last used then start shutdown
(let loop ((count 0))
(thread-sleep! 5) ;; no need to do this very often
(let ((numrunning -1)) ;; (db:get-count-tests-running db)))
(if (or (> numrunning 0)
(> (+ *last-db-access* 60)(current-seconds)))
(begin
(debug:print-info 0 *default-log-port* "Server continuing, tests running: " numrunning ", seconds since last db access: " (- (current-seconds) *last-db-access*))
(loop (+ 1 count)))
(begin
(debug:print-info 0 *default-log-port* "Starting to shutdown the server side")
(open-run-close tasks:server-delete-record tasks:open-db server-id " rpc-transport:try-start-server stop")
(thread-sleep! 10)
(debug:print-info 0 *default-log-port* "Max cached queries was " *max-cache-size*)
(debug:print-info 0 *default-log-port* "Server shutdown complete. Exiting")
))))))
(define (rpc-transport:find-free-port-and-open port)
(begin
(rpc-transport:find-free-port-and-open (+ port 1)))
(rpc-transport:find-free-port-and-open (add1 port)))
(rpc:default-server-port port)
(set! *rpc-listener-port* port) ;; a bit paranoid about rpc:default-server-port parameter not changing across threads (as params are wont to do). keeping this global in my back pocket in case this causes problems
(set! *rpc-listener-port-bind-timestamp* (current-milliseconds)) ;; may want to test how long it has been since the last bind attempt happened...
(tcp-read-timeout 240000)
(tcp-buffer-size 0) ;; gotta do this because http-transport undoes it.
(BB> "rpc-transport> attempting to bind tcp port "port)
(tcp-listen (rpc:default-server-port) 10000)))
(tcp-listen (rpc:default-server-port) 10000)
;;(tcp-listen (rpc:default-server-port) )
))
(define (rpc-transport:ping run-id host port)
(handle-exceptions
exn
(begin
(print "SERVER_NOT_FOUND")
(exit 1))
(let ((login-res ((rpc:procedure 'server:login host port) *toppath*)))
(if (and (list? login-res)
(car login-res))
(define (rpc-transport:client-setup run-id #!key (remtries 10))
(if *runremote*
(begin
(define (rpc-transport:self-test run-id host port)
(BB> "SELF TEST RPC ... *toppath*="*toppath*)
(BB> "local: [" (server:login *toppath*) "]")
;(handle-exceptions
;exn
;(begin
(debug:print-error 0 *default-log-port* "Attempt to connect to server but already connected")
#f)
(let* ((host-info (hash-table-ref/default *runremote* run-id #f))) ;; (open-run-close db:get-var #f "SERVER"))
(if host-info
(let ((iface (car host-info))
(port (cadr host-info))
(ping-res ((rpc:procedure 'server:login host port) *toppath*)))
(if ping-res
(let ((server-dat (list iface port #f #f #f)))
(hash-table-set! *runremote* run-id server-dat)
server-dat)
(begin
(server:try-running run-id)
(thread-sleep! 2)
(rpc-transport:client-setup run-id (- remtries 1)))))
(let* ((server-db-info (open-run-close tasks:get-server tasks:open-db run-id)))
(debug:print-info 0 *default-log-port* "client:setup server-dat=" server-dat ", remaining-tries=" remaining-tries)
(if server-db-info
(let* ((iface (tasks:hostinfo-get-interface server-db-info))
(port (tasks:hostinfo-get-port server-db-info))
(server-dat (list iface port #f #f #f))
(ping-res ((rpc:procedure 'server:login host port) *toppath*)))
(if start-res
(begin
(hash-table-set! *runremote* run-id server-dat)
server-dat)
(begin
(server:try-running run-id)
(thread-sleep! 2)
(rpc-transport:client-setup run-id (- remtries 1)))))
(begin
(server:try-running run-id)
(thread-sleep! 2)
(rpc-transport:client-setup run-id (- remtries 1)))))))))
;;
;; (port (if (and hostinfo (> (length hostdat) 1))(cadr hostdat) #f)))
;; (if (and port
;; (string->number port))
;; (let ((portn (string->number port)))
;; (debug:print-info 2 *default-log-port* "Setting up to connect to host " host ":" port)
;; (handle-exceptions
;; exn
;; (begin
;; (debug:print-error 0 *default-log-port* "Failed to open a connection to the server at host: " host " port: " port)
;; (debug:print 0 *default-log-port* " EXCEPTION: " ((condition-property-accessor 'exn 'message) exn))
;; ;; (open-run-close
;; ;; (lambda (db . param)
;; ;; (sqlite3:execute db "DELETE FROM metadat WHERE var='SERVER'"))
;; ;; #f)
;; (set! *runremote* #f))
;; (if (and (not (args:get-arg "-server")) ;; no point in the server using the server using the server
;; ((rpc:procedure 'server:login host portn) *toppath*))
;; (begin
;; (debug:print-info 2 *default-log-port* "Logged in and connected to " host ":" port)
;; (set! *runremote* (vector host portn)))
;; (begin
;; (debug:print-info 2 *default-log-port* "Failed to login or connect to " host ":" port)
;; (set! *runremote* #f)))))
;; (debug:print-info 2 *default-log-port* "no server available")))))
|