001    /**
002     * Copyright (c) 2000-2012 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.increment;
016    
017    import com.liferay.portal.kernel.cache.Lifecycle;
018    import com.liferay.portal.kernel.cache.ThreadLocalCacheManager;
019    import com.liferay.portal.kernel.concurrent.BatchablePipe;
020    import com.liferay.portal.kernel.increment.Increment;
021    import com.liferay.portal.kernel.log.Log;
022    import com.liferay.portal.kernel.log.LogFactoryUtil;
023    import com.liferay.portal.kernel.util.CentralizedThreadLocal;
024    import com.liferay.portal.security.auth.CompanyThreadLocal;
025    
026    import java.io.Serializable;
027    
028    import java.util.concurrent.atomic.AtomicInteger;
029    
030    /**
031     * @author Shuyang Zhou
032     */
033    public class BufferedIncrementRunnable implements Runnable {
034    
035            public BufferedIncrementRunnable(
036                    BufferedIncrementConfiguration bufferedIncrementConfiguration,
037                    BatchablePipe<Serializable, Increment<?>> batchablePipe,
038                    AtomicInteger queueLengthTracker) {
039    
040                    _bufferedIncrementConfiguration = bufferedIncrementConfiguration;
041                    _batchablePipe = batchablePipe;
042                    _queueLengthTracker = queueLengthTracker;
043    
044                    if (_bufferedIncrementConfiguration.isStandbyEnabled()) {
045                            _queueLengthTracker.incrementAndGet();
046                    }
047    
048                    _companyId = CompanyThreadLocal.getCompanyId();
049            }
050    
051            @SuppressWarnings("rawtypes")
052            public void run() {
053                    CompanyThreadLocal.setCompanyId(_companyId);
054    
055                    while (true) {
056                            BufferedIncreasableEntry bufferedIncreasableEntry =
057                                    (BufferedIncreasableEntry)_batchablePipe.take();
058    
059                            if (bufferedIncreasableEntry == null) {
060                                    break;
061                            }
062    
063                            try {
064                                    bufferedIncreasableEntry.proceed();
065                            }
066                            catch (Throwable t) {
067                                    _log.error(
068                                            "Unable to write buffered increment value to the database",
069                                            t);
070                            }
071    
072                            if (_bufferedIncrementConfiguration.isStandbyEnabled()) {
073                                    int queueLength = _queueLengthTracker.decrementAndGet();
074    
075                                    long standbyTime =
076                                            _bufferedIncrementConfiguration.calculateStandbyTime(
077                                                    queueLength);
078    
079                                    try {
080                                            Thread.sleep(standbyTime);
081                                    }
082                                    catch (InterruptedException ie) {
083                                            break;
084                                    }
085                            }
086                    }
087    
088                    ThreadLocalCacheManager.clearAll(Lifecycle.REQUEST);
089    
090                    CentralizedThreadLocal.clearShortLivedThreadLocals();
091            }
092    
093            private static Log _log = LogFactoryUtil.getLog(
094                    BufferedIncrementRunnable.class);
095    
096            private final BatchablePipe<Serializable, Increment<?>> _batchablePipe;
097            private final BufferedIncrementConfiguration
098                    _bufferedIncrementConfiguration;
099            private final long _companyId;
100            private final AtomicInteger _queueLengthTracker;
101    
102    }