001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.resiliency.spi.provider;
016    
017    import com.liferay.portal.kernel.resiliency.spi.SPI;
018    
019    import java.util.Map;
020    import java.util.concurrent.ConcurrentHashMap;
021    import java.util.concurrent.SynchronousQueue;
022    
023    /**
024     * @author Shuyang Zhou
025     */
026    public class SPISynchronousQueueUtil {
027    
028            public static SynchronousQueue<SPI> createSynchronousQueue(String spiUUID) {
029                    SynchronousQueue<SPI> synchronousQueue = new SynchronousQueue<SPI>();
030    
031                    _synchronousQueues.put(spiUUID, synchronousQueue);
032    
033                    return synchronousQueue;
034            }
035    
036            public static void destroySynchronousQueue(String spiUUID) {
037                    _synchronousQueues.remove(spiUUID);
038            }
039    
040            public static void notifySynchronousQueue(String spiUUID, SPI spi)
041                    throws InterruptedException {
042    
043                    SynchronousQueue<SPI> synchronousQueue = _synchronousQueues.remove(
044                            spiUUID);
045    
046                    if (synchronousQueue == null) {
047                            throw new IllegalStateException(
048                                    "No SPI synchronous queue with uuid " + spiUUID);
049                    }
050    
051                    synchronousQueue.put(spi);
052            }
053    
054            private static Map<String, SynchronousQueue<SPI>> _synchronousQueues =
055                    new ConcurrentHashMap<String, SynchronousQueue<SPI>>();
056    
057    }