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.dao.shard.advice;
016    
017    import com.liferay.portal.kernel.cache.CacheRegistryUtil;
018    import com.liferay.portal.kernel.dao.shard.ShardUtil;
019    import com.liferay.portal.kernel.log.Log;
020    import com.liferay.portal.kernel.log.LogFactoryUtil;
021    
022    import org.aopalliance.intercept.MethodInterceptor;
023    import org.aopalliance.intercept.MethodInvocation;
024    
025    /**
026     * @author Michael Young
027     * @author Alexander Chow
028     * @author Shuyang Zhou
029     */
030    public class ShardIterativelyAdvice implements MethodInterceptor {
031    
032            /**
033             * Invoke a join point across all shards while using the company service
034             * stack.
035             *
036             * @see ShardGloballyAdvice
037             */
038            public Object invoke(MethodInvocation methodInvocation) throws Throwable {
039                    Object returnValue = null;
040    
041                    for (String shardName : ShardUtil.getAvailableShardNames()) {
042                            if (_log.isInfoEnabled()) {
043                                    _log.info(
044                                            "Invoking shard " + shardName + " for " +
045                                                    methodInvocation.toString());
046                            }
047    
048                            _shardAdvice.pushCompanyService(shardName);
049    
050                            try {
051                                    Object value = methodInvocation.proceed();
052    
053                                    if (shardName.equals(ShardUtil.getDefaultShardName())) {
054                                            returnValue = value;
055                                    }
056                            }
057                            finally {
058                                    _shardAdvice.popCompanyService();
059    
060                                    CacheRegistryUtil.clear();
061                            }
062                    }
063    
064                    return returnValue;
065            }
066    
067            public void setShardAdvice(ShardAdvice shardAdvice) {
068                    _shardAdvice = shardAdvice;
069            }
070    
071            private static Log _log = LogFactoryUtil.getLog(
072                    ShardIterativelyAdvice.class);
073    
074            private ShardAdvice _shardAdvice;
075    
076    }