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*
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* Copyright 2007-2008 Sun Microsystems, Inc. All rights reserved.
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* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
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package com.sun.grizzly;
import java.io.IOException;
import java.nio.channels.SelectableChannel;
import java.nio.channels.SelectionKey;
import java.util.Iterator;
import java.util.concurrent.atomic.AtomicInteger;
/**
* ReadController class represents {@link Controller},
* which is not itself independent.
*
* Should be used for handling OP_READ operations
* Supports TCP derived protocols
*
* @author Alexey Stashok
*/
public class ReadController extends Controller {
/**
* Gets {@link SelectorHandler}'s clone, registered
* on this{@link ReadController}
*
* @param selectorHandler original {@link SelectorHandler}
* @return passed {@link SelectorHandler} clone, registered
* on this{@link ReadController}
*/
public SelectorHandler getSelectorHandlerClone(SelectorHandler selectorHandler) {
Iterator it = selectorHandlers.iterator();
while(it.hasNext()) {
SelectorHandler cloneSelectorHandler = it.next();
if (cloneSelectorHandler.getStateHolder() == selectorHandler.getStateHolder()) {
return cloneSelectorHandler;
}
}
return null;
}
/**
* Removes {@link SelectorHandler}'s clone, registered
* on this{@link ReadController}
*
* @param selectorHandler
*/
public void removeSelectorHandlerClone(SelectorHandler selectorHandler) {
SelectorHandler cloneSelectorHandler = getSelectorHandlerClone(selectorHandler);
if (cloneSelectorHandler != null) {
removeSelectorHandler(cloneSelectorHandler);
}
}
/**
* Add a {@link Channel}
* to be processed by{@link ReadController}'s
* {@link SelectorHandler}
*
* @param channel new channel to be managed by ReadController
* @param protocol name of the protocol channel corresponds to
*/
public void addChannel(SelectableChannel channel, SelectorHandler selectorHandler) {
selectorHandler.register(channel, SelectionKey.OP_READ);
}
/**
* Start the Controller. If the Pipeline and/or Handler has not been
* defined, the default will be used.
*/
@Override
public void start() throws IOException {
notifyStarted();
int selectorHandlerCount = selectorHandlers.size();
readySelectorHandlerCounter = new AtomicInteger(selectorHandlerCount);
stoppedSelectorHandlerCounter = new AtomicInteger(selectorHandlerCount);
for (SelectorHandler selectorHandler : selectorHandlers) {
Runnable selectorRunner = new SelectorHandlerRunner(this, selectorHandler);
// check if there is java.nio.Selector already open,
// if so, just notify the controller onReady() listeners
if (selectorHandler.getSelector() != null) {
notifyReady();
}
if (selectorHandlerCount > 1) {
// if there are more than 1 selector handler - run it in separate thread
new Thread(selectorRunner, "GrizzlySelectorRunner-read-" + selectorHandler.protocol()).start();
} else {
// else run it in current thread
selectorRunner.run();
}
}
waitUntilSeletorHandlersStop();
selectorHandlers.clear();
}
/**
* {@inheritDoc}
*/
@Override
public void stop() throws IOException {
if (stoppedSelectorHandlerCounter != null) {
waitUntilSeletorHandlersStop();
}
}
}