Megatest

(define *waiting-queue*     (make-hash-table))
(define *test-meta-updated* (make-hash-table))
(define *globalexitstatus*  0) ;; attempt to work around possible thread issues
(define *passnum*           0) ;; when running track calls to run-tests or similar

;; SERVER
(define *my-client-signature* #f)
(define *transport-type*    'fs)
(define *megatest-db*       #f)
(define *rpc:listener*      #f) ;; if set up for server communication this will hold the tcp port
(define *runremote*         #f) ;; if set up for server communication this will hold <host port>
(define *last-db-access*    (current-seconds))  ;; update when db is accessed via server
(define *max-cache-size*    0)
(define *logged-in-clients* (make-hash-table))
(define *client-non-blocking-mode* #f)

       (fs:process-queue-item packet)))
    ((http)
     (let* ((client-sig  (server:get-client-signature))
	    (query-sig   (message-digest-string (md5-primitive) (conc qtype immediate params)))
	    (zdat        (db:obj->string (vector client-sig qtype immediate query-sig params (current-seconds))))) ;; (with-output-to-string (lambda ()(serialize params))))
       (debug:print-info 11 "zdat=" zdat)
       (let* ((res  #f)
	      (rawdat      (server:client-send-receive serverdat zdat))
	      (tmp         #f))
	 (debug:print-info 11 "Sent " zdat ", received " rawdat)
	 (set! tmp (db:string->obj rawdat))
	 (vector-ref tmp 2))))
    ((zmq)
     (handle-exceptions
      exn

								"</body>")
						    headers: '((content-type text/plain)))))
				  (else (continue))))))))
    (http-transport:try-start-server ipaddrstr start-port)
    ;; lite3:finalize! db)))
    ))



;; (define (http-transport:main-loop)
;;   (print "INFO: Exectuing main server loop")
;;   (access-log "megatest-http.log")
;;   (server-bind-address #f)
;;   (define-page (main-page-path)
;;     (lambda ()
;;       (let ((dat ($ "dat")))
;;       ;; (with-request-variables (dat)
;;         (debug:print-info 12 "Got dat=" dat)
;; 	(let* ((packet (db:string->obj dat))
;; 	       (qtype  (cdb:packet-get-qtype packet)))
;; 	  (debug:print-info 12 "server=> received packet=" packet)
;; 	  (if (not (member qtype '(sync ping)))
;; 	      (begin
;; 		(mutex-lock! *heartbeat-mutex*)
;; 		(set! *last-db-access* (current-seconds))
;; 		(mutex-unlock! *heartbeat-mutex*)))
;; 	  (let ((res (open-run-close db:process-queue-item open-db packet)))
;; 	    (debug:print-info 11 "Return value from db:process-queue-item is " res)
;; 	    res))))))

;;; (use spiffy uri-common intarweb)
;;; 
;;; (root-path "/var/www")
;;; 
;;; (vhost-map `(((* any) . ,(lambda (continue)
;;;                            (if (equal? (uri-path (request-uri (current-request))) 
;;;                                        '(/ "hey"))
;;;                                (send-response body: "hey there!\n"
;;;                                               headers: '((content-type text/plain)))
;;;                                (continue))))))
;;; 
;;; (start-server port: 12345)

;; This is recursively run by http-transport:run until sucessful
;;
(define (http-transport:try-start-server ipaddrstr portnum)
  (handle-exceptions
   exn
   (begin
     (print-error-message exn)

	    (exit) ;; must do, would have to add checks to many/all calls below
	    )
	  (exit)))
    ;; if not list or kill then start a client (if appropriate)
    (if (or (args-defined? "-h" "-version" "-gen-megatest-area" "-gen-megatest-test")
	    (eq? (length (hash-table-keys args:arg-hash)) 0))
	(debug:print-info 1 "Server connection not needed")
	
	(server:client-launch)))

;;======================================================================
;; Weird special calls that need to run *after* the server has started?
;;======================================================================

(if (args:get-arg "-list-targets")

;;
(define (server:client-setup #!key (numtries 50))
  (if (not *toppath*)
      (if (not (setup-for-run))
	  (begin
	    (debug:print 0 "ERROR: failed to find megatest.config, exiting")
	    (exit))))

  (let* ((hostinfo   (if (not *transport-type*) ;; If we dont' already have transport type set then figure it out
			 (open-run-close tasks:get-best-server tasks:open-db)
			 #f)))
    ;; if have hostinfo then extract the transport type 
    ;; else fall back to fs
    ;; 

    (set! *transport-type* (if hostinfo 
			       (string->vector (tasks:hostinfo-get-transport hostinfo))
			       'fs))
    (debug:print-info 1 "Using transport type of " *transport-type* (if hostinfo (conc " to connect to " hostinfo) ""))
    (case *transport-type* 
    ((fs)(if (not *megatest-db*)(set! *megatest-db* (open-db))))
    ((http)
     (http-transport:client-connect (tasks:hostinfo-get-interface hostinfo)
				    (tasks:hostinfo-get-port hostinfo)))

	  ))
    mdb))
    
;;======================================================================
;; Server and client management
;;======================================================================

;; make-vector-record tasks hostinfo id interface port pubport transport
(define (make-tasks:hostinfo)(make-vector 5))
(define (tasks:hostinfo-get-id          vec)    (vector-ref  vec 0))
(define (tasks:hostinfo-get-interface   vec)    (vector-ref  vec 1))
(define (tasks:hostinfo-get-port        vec)    (vector-ref  vec 2))
(define (tasks:hostinfo-get-pubport     vec)    (vector-ref  vec 3))
(define (tasks:hostinfo-get-transport   vec)    (vector-ref  vec 4))



;; state: 'live, 'shutting-down, 'dead
(define (tasks:server-register mdb pid interface port priority state transport #!key (pubport -1))
  (debug:print-info 11 "tasks:server-register " pid " " interface " " port " " priority " " state)
  (sqlite3:execute 
   mdb 
   "INSERT OR REPLACE INTO servers (pid,hostname,port,pubport,start_time,priority,state,mt_version,heartbeat,interface,transport)

;; ping each server in the db and return first found that responds. 
;; remove any others. will not necessarily remove all!
(define (tasks:get-best-server mdb)
  (let ((res '())
	(best #f))
    (sqlite3:for-each-row
     (lambda (id hostname interface port pid)
       (set! res (cons (list hostname interface port pid id) res))
       (debug:print-info 2 "Found existing server " hostname ":" port " registered in db"))
     mdb
     "SELECT id,hostname,interface,port,pid FROM servers
         WHERE strftime('%s','now')-heartbeat < 10
               AND mt_version=? ORDER BY start_time ASC LIMIT 1;" megatest-version)
    ;; for now we are keeping only one server registered in the db, return #f or first server found
    (if (null? res) #f (car res))))

;; BUG: This logic is probably needed unless methodology changes completely...
;;