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 */ 017 package org.apache.activemq.broker.region.virtual; 018 019 import org.apache.activemq.broker.Broker; 020 import org.apache.activemq.broker.ConnectionContext; 021 import org.apache.activemq.broker.region.Destination; 022 import org.apache.activemq.command.ActiveMQDestination; 023 import org.apache.activemq.command.ActiveMQQueue; 024 import org.apache.activemq.command.ActiveMQTopic; 025 import org.apache.activemq.filter.DestinationFilter; 026 027 /** 028 * Creates <a href="http://activemq.org/site/virtual-destinations.html">Virtual 029 * Topics</a> using a prefix and postfix. The virtual destination creates a 030 * wildcard that is then used to look up all active queue subscriptions which 031 * match. 032 * 033 * @org.apache.xbean.XBean 034 * 035 * 036 */ 037 public class VirtualTopic implements VirtualDestination { 038 039 private String prefix = "Consumer.*."; 040 private String postfix = ""; 041 private String name = ">"; 042 private boolean selectorAware = false; 043 private boolean local = false; 044 045 046 public ActiveMQDestination getVirtualDestination() { 047 return new ActiveMQTopic(getName()); 048 } 049 050 public Destination intercept(Destination destination) { 051 return selectorAware ? new SelectorAwareVirtualTopicInterceptor(destination, getPrefix(), getPostfix(), isLocal()) : 052 new VirtualTopicInterceptor(destination, getPrefix(), getPostfix(), isLocal()); 053 } 054 055 056 public void create(Broker broker, ConnectionContext context, ActiveMQDestination destination) throws Exception { 057 if (destination.isQueue() && destination.isPattern() && broker.getDestinations(destination).isEmpty()) { 058 DestinationFilter filter = DestinationFilter.parseFilter(new ActiveMQQueue(prefix + DestinationFilter.ANY_DESCENDENT)); 059 if (filter.matches(destination)) { 060 broker.addDestination(context, destination, false); 061 } 062 } 063 } 064 065 public void remove(Destination destination) { 066 } 067 068 // Properties 069 // ------------------------------------------------------------------------- 070 071 public String getPostfix() { 072 return postfix; 073 } 074 075 /** 076 * Sets any postix used to identify the queue consumers 077 */ 078 public void setPostfix(String postfix) { 079 this.postfix = postfix; 080 } 081 082 public String getPrefix() { 083 return prefix; 084 } 085 086 /** 087 * Sets the prefix wildcard used to identify the queue consumers for a given 088 * topic 089 */ 090 public void setPrefix(String prefix) { 091 this.prefix = prefix; 092 } 093 094 public String getName() { 095 return name; 096 } 097 098 public void setName(String name) { 099 this.name = name; 100 } 101 102 /** 103 * Indicates whether the selectors of consumers are used to determine dispatch 104 * to a virtual destination, when true only messages matching an existing 105 * consumer will be dispatched. 106 * @param selectorAware when true take consumer selectors into consideration 107 */ 108 public void setSelectorAware(boolean selectorAware) { 109 this.selectorAware = selectorAware; 110 } 111 112 public boolean isSelectorAware() { 113 return selectorAware; 114 } 115 116 public boolean isLocal() { 117 return local; 118 } 119 120 public void setLocal(boolean local) { 121 this.local = local; 122 } 123 }