66 lines
2.3 KiB
HTML
66 lines
2.3 KiB
HTML
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<html>
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<head>
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<link href='./../_highlighter/SyntaxHighlighter.css' rel='stylesheet' type='text/css'/>
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<script language='javascript' src='./../_highlighter/shAll.js'></script>
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</head>
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<body>
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<pre name="code" class="scala" style="width:100%">
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/**
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* Copyright (C) 2009 Scalable Solutions.
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*/
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/**
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* Implements the Reactor pattern as defined in: [http://www.cs.wustl.edu/~schmidt/PDF/reactor-siemens.pdf].
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* See also this article: [http://today.java.net/cs/user/print/a/350].
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*
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* Based on code from the actorom actor framework by Sergio Bossa [http://code.google.com/p/actorom/].
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*/
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package se.scalablesolutions.akka.dispatch
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import java.util.{LinkedList, List}
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class EventBasedSingleThreadDispatcher(name: String) extends MessageDispatcherBase(name) {
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def start = if (!active) {
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active = true
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val messageDemultiplexer = new EventBasedSingleThreadDemultiplexer(queue)
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selectorThread = new Thread {
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override def run = {
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while (active) {
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try {
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messageDemultiplexer.select
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} catch { case e: InterruptedException => active = false }
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val selectedInvocations = messageDemultiplexer.acquireSelectedInvocations
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val iter = selectedInvocations.iterator
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while (iter.hasNext) {
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val invocation = iter.next
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val invoker = messageHandlers.get(invocation.receiver)
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if (invoker != null) invoker.invoke(invocation)
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iter.remove
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}
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}
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}
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}
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selectorThread.start
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}
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}
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class EventBasedSingleThreadDemultiplexer(private val messageQueue: ReactiveMessageQueue) extends MessageDemultiplexer {
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private val selectedQueue: List[MessageInvocation] = new LinkedList[MessageInvocation]
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def select = messageQueue.read(selectedQueue)
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def acquireSelectedInvocations: List[MessageInvocation] = selectedQueue
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def releaseSelectedInvocations = throw new UnsupportedOperationException("EventBasedSingleThreadDemultiplexer can't release its queue")
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def wakeUp = throw new UnsupportedOperationException("EventBasedSingleThreadDemultiplexer can't be woken up")
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}
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</pre>
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<script language='javascript'>
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dp.SyntaxHighlighter.ClipboardSwf = './../_highlighter/clipboard.swf';
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dp.SyntaxHighlighter.HighlightAll('code');
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</script>
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