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;; 1. client sends request to server via push to the pull port
;; 2. server puts request in queue or processes immediately as appropriate
;; 3. server puts responses from completed requests into pub port
;;
;; TODO
;;
;; Done Tested
;; [ ] [ ] 1. Add columns pullport pubport to servers table
;; [ ] [ ] 2. Add rm of monitor.db if older than 11/12/2012
;; [x] [ ] 1. Add columns pullport pubport to servers table
;; [x] [ ] 2. Add rm of monitor.db if older than 11/12/2012
;; [x] [ ] 3. Add create of pullport and pubport with finding of available ports
;; [ ] [ ] 4. Add client compose of request
;; [ ] [ ] - name of client: testname/itempath-test_id-hostname
;; [ ] [ ] - name of request: callname, params
;; [ ] [ ] - request key: f(clientname, callname, params)
;; [ ] [ ] 5. Add processing of subscription hits
;; [ ] [ ] - done when get key
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(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*)))
;;
(define (server:client-connect iface port #!key (context #f))
(define (server:client-connect iface port #!key (context #f)(type 'req))
(debug:print-info 3 "client-connect " iface ":" port)
(let ((connect-ok #f)
(zmq-socket (if context
(make-socket 'req context)
(make-socket 'req)))
(make-socket type context)
(make-socket type)))
(conurl (server:make-server-url (list iface port))))
(if (socket? zmq-socket)
(begin
(connect-socket zmq-socket conurl)
zmq-socket)
#f)))
(define (server:client-login zmq-socket)
(cdb:login zmq-socket *toppath* (server:get-client-signature)))
(define (server:client-login zmq-sockets)
(cdb:login zmq-sockets *toppath* (server:get-client-signature)))
(define (server:client-logout zmq-socket)
(let ((ok (and (socket? zmq-socket)
(cdb:logout zmq-socket *toppath* (server:get-client-signature)))))
;; (close-socket zmq-socket)
ok))
;; Do all the connection work, start a server if not already running
(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 (open-run-close tasks:get-best-server tasks:open-db)))
(if hostinfo
(let ((host (car hostinfo))
(iface (cadr hostinfo))
(port (caddr hostinfo)))
(let ((host (list-ref hostinfo 0))
(iface (list-ref hostinfo 1))
(pullport (list-ref hostinfo 2))
(pubport (list-ref hostinfo 3)))
(debug:print-info 2 "Setting up to connect to " hostinfo)
(handle-exceptions
exn
(begin
;; something went wrong in connecting to the server. In this scenario it is ok
;; to try again
(debug:print 0 "ERROR: Failed to open a connection to the server at: " hostinfo)
(debug:print 0 " EXCEPTION: " ((condition-property-accessor 'exn 'message) exn))
(debug:print 0 " perhaps jobs killed with -9? Removing server records")
(open-run-close tasks:server-deregister tasks:open-db host port: port)
(server:client-setup (- numtries 1))
#f)
(let* ((zmq-socket (server:client-connect iface port))
(login-res (server:client-login zmq-socket))
(connect-ok (if (null? login-res) #f (car login-res)))
(let* ((push-socket (server:client-connect iface pullport 'push))
(sub-socket (server:client-connect iface pubport 'sub))
(zmq-sockets (vector push-socket sub-socket))
(login-res #f)
;; (connect-ok
(conurl (server:make-server-url (list iface port))))
(socket-option-set! sub-socket 'subscribe (server:get-client-signature))
(set! login-res (server:client-login zmq-sockets))
(if connect-ok
(if (and (not (null? login-res))
(car login-res))
(begin
(debug:print-info 2 "Logged in and connected to " conurl)
(set! *runremote* zmq-socket)
#t)
(begin
(debug:print-info 2 "Failed to login or connect to " conurl)
(set! *runremote* #f)
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