In the example below 256 clients threads put a byte (0-255) to server-
socket reference var "items",
then connect to server-socket, write the same byte to socket stream
and close the connection.
The server connections threads reads a byte from the socket stream and
remove it from the var "items".
At the end of the run i expect the var items to be empty but it is
not.
It 's contains a random number of bytes.
Where is the error?
(ns
test-dosync
(:import (java.net Socket))
(:use clojure.contrib.server-socket))
(def server
(let [items (ref nil)
server-ref (ref nil)
server-fn (fn [ins _]
(let [bt (.read ins)]
(dosync
(ref-set items (remove #(= % bt) @items)))))]
{:enq (fn [item] (dosync (alter items conj item)))
:list-items (fn [] @items)
:start (fn [port]
(let [socket-server (create-server port server-fn)]
(dosync
(ref-set items nil)
(ref-set server-ref socket-server))))
:stop (fn [] (when @server-ref (close-server @server-ref)))
}))
(defn start-server [port] ((:start server) port))
(defn stop-server [] ((:stop server)))
(defn enq [id] ((:enq server) id))
(defn list-items [] ((:list-items server)))
(defn client-fn [port #^Byte byte-to-send]
#(let [socket (Socket. "localhost" port)
outs (.getOutputStream socket)]
(try
(do
(enq byte-to-send)
(doto outs (.write byte-to-send) (.flush)))
(finally
(.close socket)))))
(defn run-test []
(try
(let [port 10002]
(start-server port)
(dorun (apply pcalls (map #(client-fn port %) (range 256)))))
(finally (stop-server)))
(list-items))
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