;; Copyright 2006-2012, Matthew Welland.
;;
;; This program is made available under the GNU GPL version 2.0 or
;; greater. See the accompanying file COPYING for details.
;;
;; This program is distributed WITHOUT ANY WARRANTY; without even the
;; implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
;; PURPOSE.
(require-extension (srfi 18) extras tcp s11n rpc)
(import (prefix rpc rpc:))
(use sqlite3 srfi-1 posix regex regex-case srfi-69 hostinfo md5 message-digest)
(import (prefix sqlite3 sqlite3:))
(declare (unit rpc-transport))
(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")
;; 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 "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)))
;; all routes though here end in exit ...
;;
;; start_server?
;;
(define (rpc-transport:launch 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 "INFO: Server for run-id " run-id " already running")
(exit 0)))
(let loop ((server-id (open-run-close tasks:server-lock-slot tasks:open-db run-id))
(remtries 4))
(if (not server-id)
(if (> remtries 0)
(begin
(thread-sleep! 2)
(loop (open-run-close tasks:server-lock-slot tasks:open-db 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 "INFO: server pid=" (current-process-id) ", hostname=" (get-host-name) " not starting due to other candidates ahead in start queue")
(open-run-close tasks:server-delete-records-for-this-pid tasks:open-db " rpc-transport:launch")))
(begin
(rpc-transport:run (if (args:get-arg "-server")(args:get-arg "-server") "-") run-id server-id)
(exit)))))
(define (rpc-transport:run hostn run-id server-id)
(debug:print 2 "Attempting to start the rpc server ...")
;; (trace rpc:publish-procedure!)
(rpc:publish-procedure! 'server:login server:login)
(rpc:publish-procedure! 'testing (lambda () "Just testing"))
(let* ((db #f)
(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)))
(if ipstr ipstr hostn))) ;; hostname)))
(start-port (open-run-close tasks:server-get-next-port tasks:open-db))
(link-tree-path (configf:lookup *configdat* "setup" "linktree"))
(rpc:listener (rpc-transport:find-free-port-and-open (rpc:default-server-port)))
(th1 (make-thread
(lambda ()
((rpc:make-server rpc:listener) #t))
"rpc:server"))
;; (cute (rpc:make-server rpc:listener) "rpc:server")
;; 'rpc:server))
(hostname (if (string=? "-" hostn)
(get-host-name)
hostn))
(ipaddrstr (if (string=? "-" hostn)
(server:get-best-guess-address hostname) ;; (string-intersperse (map number->string (u8vector->list (hostname->ip hostname))) ".")
#f))
(portnum (rpc:default-server-port))
(host:port (conc (if ipaddrstr ipaddrstr hostname) ":" portnum))
(tdb (tasks:open-db)))
(thread-start! th1)
(set! db *inmemdb*)
(open-run-close tasks:server-set-interface-port
tasks:open-db
server-id
ipaddrstr portnum)
(debug:print 0 "Server started on " host:port)
;; (trace rpc:publish-procedure!)
;; (rpc:publish-procedure! 'server:login server:login)
;; (rpc:publish-procedure! 'testing (lambda () "Just testing"))
;;======================================================================
;; ;; end of publish-procedure section
;;======================================================================
;;
(on-exit (lambda ()
(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 "Server continuing, tests running: " numrunning ", seconds since last db access: " (- (current-seconds) *last-db-access*))
(loop (+ 1 count)))
(begin
(debug:print-info 0 "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 "Max cached queries was " *max-cache-size*)
(debug:print-info 0 "Server shutdown complete. Exiting")
))))))
(define (rpc-transport:find-free-port-and-open port)
(handle-exceptions
exn
(begin
(print "Failed to bind to port " (rpc:default-server-port) ", trying next port")
(rpc-transport:find-free-port-and-open (+ port 1)))
(rpc:default-server-port port)
(tcp-read-timeout 240000)
(tcp-listen (rpc:default-server-port) 10000)))
(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))
(begin
(print "LOGIN_OK")
(exit 0))
(begin
(print "LOGIN_FAILED")
(exit 1))))))
(define (rpc-transport:client-setup run-id #!key (remtries 10))
(if *runremote*
(begin
(debug:print 0 "ERROR: 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 "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 "Setting up to connect to host " host ":" port)
;; (handle-exceptions
;; exn
;; (begin
;; (debug:print 0 "ERROR: Failed to open a connection to the server at host: " host " port: " port)
;; (debug:print 0 " 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 "Logged in and connected to " host ":" port)
;; (set! *runremote* (vector host portn)))
;; (begin
;; (debug:print-info 2 "Failed to login or connect to " host ":" port)
;; (set! *runremote* #f)))))
;; (debug:print-info 2 "no server available")))))