001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.activemq.plugin; 018 019import java.io.File; 020 021import org.apache.activemq.broker.Broker; 022import org.apache.activemq.broker.BrokerPlugin; 023 024import static org.apache.activemq.plugin.SubQueueSelectorCacheBroker.MAX_PERSIST_INTERVAL; 025 026/** 027 * A plugin which allows the caching of the selector from a subscription queue. 028 * <p/> 029 * This stops the build-up of unwanted messages, especially when consumers may 030 * disconnect from time to time when using virtual destinations. 031 * <p/> 032 * This is influenced by code snippets developed by Maciej Rakowicz 033 * 034 * @author Roelof Naude roelof(dot)naude(at)gmail.com 035 *@org.apache.xbean.XBean element="virtualSelectorCacheBrokerPlugin" 036 */ 037public class SubQueueSelectorCacheBrokerPlugin implements BrokerPlugin { 038 039 040 private File persistFile; 041 private boolean singleSelectorPerDestination = false; 042 private boolean ignoreWildcardSelectors = false; 043 private long persistInterval = MAX_PERSIST_INTERVAL; 044 045 @Override 046 public Broker installPlugin(Broker broker) throws Exception { 047 SubQueueSelectorCacheBroker rc = new SubQueueSelectorCacheBroker(broker, persistFile); 048 rc.setSingleSelectorPerDestination(singleSelectorPerDestination); 049 rc.setPersistInterval(persistInterval); 050 rc.setIgnoreWildcardSelectors(ignoreWildcardSelectors); 051 return rc; 052 } 053 054 /** 055 * Sets the location of the persistent cache 056 */ 057 public void setPersistFile(File persistFile) { 058 this.persistFile = persistFile; 059 } 060 061 public File getPersistFile() { 062 return persistFile; 063 } 064 065 public boolean isSingleSelectorPerDestination() { 066 return singleSelectorPerDestination; 067 } 068 069 public void setSingleSelectorPerDestination(boolean singleSelectorPerDestination) { 070 this.singleSelectorPerDestination = singleSelectorPerDestination; 071 } 072 073 public long getPersistInterval() { 074 return persistInterval; 075 } 076 077 public void setPersistInterval(long persistInterval) { 078 this.persistInterval = persistInterval; 079 } 080 081 public boolean isIgnoreWildcardSelectors() { 082 return ignoreWildcardSelectors; 083 } 084 085 public void setIgnoreWildcardSelectors(boolean ignoreWildcardSelectors) { 086 this.ignoreWildcardSelectors = ignoreWildcardSelectors; 087 } 088}