;; 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)
(use srfi-1 posix regex regex-case srfi-69 hostinfo md5 message-digest directory-utils)
;; (use zmq)
(use spiffy uri-common intarweb http-client spiffy-request-vars)
(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 daemon))
(include "common_records.scm")
(include "db_records.scm")
(define (server:make-server-url hostport)
(if (not hostport)
#f
(conc "http://" (car hostport) ":" (cadr hostport))))
(define *server-loop-heart-beat* (current-seconds))
(define *heartbeat-mutex* (make-mutex))
;;======================================================================
;; S E R V E R
;;======================================================================
;; Call this to start the actual server
;;
;; all routes though here end in exit ...
;;
;; start_server
;;
(define (server:launch run-id)
(let ((transport (server:get-transport)))
(case transport
((http) (http-transport:launch run-id))
((rpc) (rpc-transport:launch run-id))
(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* ((target-host (configf:lookup *configdat* "server" "homehost" ))
(cmdln (conc (common:get-megatest-exe)
" -server - -run-id " run-id " >> " *toppath* "/db/" run-id ".log 2>&1 &")))
(debug:print 0 "INFO: Starting server (" cmdln ") as none running ...")
(push-directory *toppath*)
(if target-host
(begin
(set-environment-variable "TARGETHOST" target-host)
(system (conc "nbfake " cmdln)))
(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) 40))
(begin
(server:run run-id)
(hash-table-set! *server-kind-run* run-id (current-seconds))))))
;; The generic run a server command. Dispatches the call to server 0 if run-id != 0
;;
(define (server:try-running run-id)
(if (eq? run-id 0)
(server:run run-id)
(rmt:start-server run-id)))
(define (server:check-if-running run-id)
(let loop ((server (open-run-close tasks:get-server tasks:open-db run-id))
(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 (vector-ref server 1)(vector-ref server 0))))
;; if the server didn't respond we must remove the record
(if res
#t
(begin
(open-run-close tasks:server-force-clean-running-records-for-run-id tasks:open-db run-id
" server:check-if-running")
res)))
#f)))
(define (server:ping-server run-id iface port)
(with-input-from-pipe
(conc (common:get-megatest-exe) " -run-id " run-id " -ping " (conc iface ":" port))
(lambda ()
(let loop ((inl (read-line))
(res "NOREPLY"))
(if (eof-object? inl)
(case (string->symbol res)
((NOREPLY) #f)
((LOGIN_OK) #t)
(else #f))
(loop (read-line) inl))))))