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regex-case
srfi-1
srfi-18
srfi-4
srfi-69
stack
typed-records
tcp-server
tcp6
tcp
commonmod
debugprint
)
;;======================================================================
;; client
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(defstruct tt-conn
host
port
dbfname
)
(defstruct tt-srv
;; server related
socket
thread
host-port
(socket #f)
(thread #f)
(host-port #f)
(cmd-thread #f)
)
(define (tt:make-remote areapath)
(make-tt area: areapath))
(define (tt:client-connect-to-server ttdat)
#f)
;; client side handler
;;
(define (tt:handler runremote cmd rid params attemptnum area-dat areapath readonly-mode dbfname)
;; NOTE: areapath is passed in and in tt struct. We'll use passed in value for now.
(let* ((conn (hash-table-ref/default (tt-conns runremote) dbfname #f)))
(if conn
;; have connection, call the server
(let* ((res (tt:send-receive runremote conn cmd rid params)))
(cond
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;;======================================================================
(define (tt:sync-dbs ttdat)
#f)
;; start the listener and start responding to requests
;;
;; NOTE: organise by dbfname, not run-id so we don't need
;; to pull in more modules
;;
(define (tt:start-server ttdat dbfname)
(define (tt:start-server areapath dbfname handler)
;; is there already a server for this dbfile? Then exit.
(let* ((ttdat (make-tt-srv areapath: areapath))
;; (dbfname (dbmod:run-id->dbfname run-id))
(let* ((servers (tt:find-server ttdat dbfname)))
(if (not (null? servers))
(exit))
(begin
(tt:start-tcp-server ttdat)
(tt:keep-running ttdat dbfname)))))
(exit)))))
((make-tcp-server
(tcp-listen 6504)
(lambda ()
(write-line (seconds->string (current-seconds)))))
#t)
;; find a port and start tcp-server
;;
(define (tt:start-tcp-server ttdat)
(setup-listener ttdat)
(let* ((socket (tt-srv-socket ttdat))
(handler (tt-srv-handler ttdat)))
((make-tcp-server socket handler)
#t ;; yes, send error messages to std-err
#f)
)))
(define (tt:keep-running ttdat dbfile)
;; verfiy conn for ready
;; listener socket has been started by this stage
(debug:print 0 *default-log-port* "INFO: Got here!!!!"))
#f)
;; close up ports here
#f))
(tcp-close (tt-srv-socket ttdat)) ;; close up ports here
))
(define (wait-and-close uconn)
(thread-join! (tt-srv-cmd-thread uconn))
(tcp-close (tt-srv-socket uconn)))
;; (define (wait-and-close uconn)
;; (thread-join! (tt-srv-cmd-thread uconn))
;; (tcp-close (tt-srv-socket uconn)))
;; return servid
;; side-effects:
;; ttdat-cleanup-proc is populated with function to remove the serverinfo file
(define (tt:create-server-registration-file ttdat dbfname)
(let* ((areapath (tt-areapath ttdat))
(servdir (tt:get-servinfo-dir areapath))
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;; my port, address, hostname, pid etc.
;; return #f if fail to find a port to allocate.
;;
;; if udata-in is #f create the record
;; if there is already a serv-listener return the udata
;;
(define (setup-listener uconn #!optional (port 4242))
(assert (tt-srv? uconn) "FATAL: setup-listener called with wrong struct "uconn)
(handle-exceptions
exn
(if (< port 65535)
(setup-listener uconn (+ port 1))
#f)
(connect-listener uconn port)))
|