/*
 * Copyright (c) 2009, 2017 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

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;

IOStrategy, which executes Processors in a current threads, and resumes selector thread logic in separate thread.
Author:Alexey Stashok
/** * {@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; } } }