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;; pub/sub with envelope address
;; Note that if you don't insert a sleep, the server will crash with SIGPIPE as soon
;; as a client disconnects. Also a remaining client may receive tons of
;; messages afterward.
(use zmq srfi-18 sqlite3)
(define pub (make-socket 'pub))
(define pull (make-socket 'pull))
(define cname "server")
(define total-db-accesses 0)
(define start-time (current-seconds))
(socket-option-set! pub 'hwm 1000)
(socket-option-set! pull 'hwm 1000)
(bind-socket pub "tcp://*:6563")
(bind-socket pull "tcp://*:6564")
(thread-sleep! 0.2)
(define (open-db)
(let* ((dbpath "mockup.db")
(dbexists (file-exists? dbpath))
(db (open-database dbpath)) ;; (never-give-up-open-db dbpath))
(handler (make-busy-timeout 10)))
(set-busy-handler! db handler)
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(set! res val))
db
"SELECT val FROM vars WHERE var=?;" cdata)
res))
(else (conc "unk cmd: " clcmd))))))
queuelst)))
;; SERVER THREAD
(define th1 (make-thread
(lambda ()
(let ((last-run 0)) ;; current-seconds when run last
(let loop ((queuelst '()))
(let* ((indat (receive-message* pull))
(parts (string-split indat ":"))
(cname (car parts)) ;; client name
(clcmd (string->symbol (cadr parts))) ;; client cmd
(cdata (caddr parts)) ;; client data
(svect (vector (current-seconds) cname clcmd cdata))) ;; record for the queue
;; (print "Server received message: " indat)
(count-client db cname)
(case clcmd
((ping)
(print "Got ping from " cname)
(send-message pub cname send-more: #t)
(send-message pub "Got ping")
(loop queuelst))
((sync) ;; just process the queue
(print "Got sync from " cname)
(process-queue (cons svect queuelst))
(loop '()))
((get)
(process-queue (cons svect queuelst))
(loop '()))
(else
(loop (cons svect queuelst))))))))
"server thread"))
(include "mockupclientlib.scm")
;; SYNC THREAD
;; send a sync to the pull port
(define th2 (make-thread
(lambda ()
(let ((last-action-time (current-seconds)))
(let loop ()
(thread-sleep! 5)
(let ((queuelen (string->number (dbaccess "server" 'sync "nada" #f)))
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