/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2009-2013 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.glassfish.grizzly.strategies;
import java.io.IOException;
import java.util.concurrent.Executor;
import java.util.logging.Logger;
import org.glassfish.grizzly.Connection;
import org.glassfish.grizzly.Grizzly;
import org.glassfish.grizzly.IOEvent;
import org.glassfish.grizzly.IOEventLifeCycleListener;
import org.glassfish.grizzly.nio.NIOConnection;
import org.glassfish.grizzly.nio.SelectorRunner;
/**
* {@link org.glassfish.grizzly.IOStrategy}, which executes {@link org.glassfish.grizzly.Processor}s in a current threads, and
* resumes selector thread logic in separate thread.
*
* @author Alexey Stashok
*/
public final class LeaderFollowerNIOStrategy extends AbstractIOStrategy {
private static final LeaderFollowerNIOStrategy INSTANCE = new LeaderFollowerNIOStrategy();
private static final Logger logger = Grizzly.logger(LeaderFollowerNIOStrategy.class);
// ------------------------------------------------------------ Constructors
private LeaderFollowerNIOStrategy() { }
// ---------------------------------------------------------- Public Methods
public static LeaderFollowerNIOStrategy getInstance() {
return INSTANCE;
}
// ------------------------------------------------- Methods from IOStrategy
@Override
public boolean executeIoEvent(final Connection connection,
final IOEvent ioEvent, final boolean isIoEventEnabled) throws IOException {
final NIOConnection nioConnection = (NIOConnection) connection;
IOEventLifeCycleListener listener = null;
if (isReadWrite(ioEvent)) {
if (isIoEventEnabled) {
connection.disableIOEvent(ioEvent);
}
listener = ENABLE_INTEREST_LIFECYCLE_LISTENER;
}
final Executor threadPool = getThreadPoolFor(connection, ioEvent);
if (threadPool != null) {
final SelectorRunner runner = nioConnection.getSelectorRunner();
runner.postpone();
threadPool.execute(runner);
fireIOEvent(connection, ioEvent, listener, logger);
return false;
} else {
fireIOEvent(connection, ioEvent, listener, logger);
return true;
}
}
}