Megatest

;; 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)

(bind-socket pub "tcp://*:5563")
(bind-socket pull "tcp://*:5564")

(define (open-db)
  (let* ((dbpath    "mockup.db")
	 (dbexists  (file-exists? dbpath))

	  (execute db "INSERT OR REPLACE INTO clients (name) VALUES(?);" cname)
	  (for-each-row 
	   (lambda (id)
	     (set! cid id))
	   db
	   "SELECT id FROM clients WHERE name=?;" cname)
	  (hash-table-set! cid-cache cname cid)
	  (set! total-db-accesses (+ total-db-accesses 2))
	  cid))))

(define (count-client db cname)
  (let ((cid (get-client-id db cname)))
    (execute db "UPDATE clients SET num_accesses=num_accesses+1 WHERE id=?;" cid)))
    (execute db "UPDATE clients SET num_accesses=num_accesses+1 WHERE id=?;" cid)
    (set! total-db-accesses (+ total-db-accesses 1))
    ))

(define db (open-db))
;; (define queuelst '())
;; (define mx1 (make-mutex))

(define (process-queue queuelst)
  (let ((queuelen (length queuelst)))
    (for-each
     (lambda (item)
       (let ((cname (vector-ref item 1))
	     (clcmd (vector-ref item 2))
	     (cdata (vector-ref item 3)))
	 (send-message pub cname send-more: #t)
	 (send-message pub (case clcmd
			     ((sync)
			      (conc queuelen))
			     ((set)
			      (set! total-db-accesses (+ total-db-accesses 1))
			      (apply execute db "INSERT OR REPLACE INTO vars (var,val) VALUES (?,?);" (string-split cdata))
			      "ok")
			     ((get)
			      (set! total-db-accesses (+ total-db-accesses 1))
			      (let ((res "noval"))
				(for-each-row
				 (lambda (val)
				   (set! res val))
				 db 
				 "SELECT val FROM vars WHERE var=?;" cdata)
				res))

;; 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)))
			 (last-action-delta #f))
		     (if (> queuelen 1)(set! last-action-time (current-seconds)))
			 (last-action-delta (- (current-seconds) last-action-time)))
		     (set! last-action-delta (- (current-seconds) last-action-time))
		     (print "Server: Got queuelen=" queuelen ", last-action-delta=" last-action-delta)
		     (if (> queuelen 1)(set! last-action-time (current-seconds)))
		     (if (< last-action-delta 15)
		     (if (< last-action-delta 25)
			 (loop)
			 (print "Server exiting, 15 seconds since last access"))))))
			 (print "Server exiting, 25 seconds since last access"))))))
	     "sync thread"))

(thread-start! th1)
(thread-start! th2)
(thread-join! th2)

(print "Server exited!")
(print "Server exited! Total db accesses=" total-db-accesses)

IVALS=
for i in a b c d e f g h i j k l m n o p q s t u v w x y z; 
  do
  for k in a b;
    do
    for j in 0 1 2 3 4 5 6 7 8 9;
      do
      waittime=`random 0 20`
      runtime=`random 5 20`
      waittime=`random 0 30`
      runtime=`random 5 120`
      echo "Starting client $i$k$j with waittime $waittime and runtime $runtime" 
      (sleep $waittime;./mockupclient $i$k$j $runtime) &
    done
  done
done

wait