001 /** 002 * 003 * Licensed to the Apache Software Foundation (ASF) under one or more 004 * contributor license agreements. See the NOTICE file distributed with 005 * this work for additional information regarding copyright ownership. 006 * The ASF licenses this file to You under the Apache License, Version 2.0 007 * (the "License"); you may not use this file except in compliance with 008 * the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 package org.apache.activemq.camel.component; 019 020 import java.util.Set; 021 022 import javax.annotation.PostConstruct; 023 import javax.annotation.PreDestroy; 024 import javax.jms.Connection; 025 import javax.jms.ConnectionFactory; 026 027 import org.apache.activemq.EnhancedConnection; 028 import org.apache.activemq.advisory.DestinationEvent; 029 import org.apache.activemq.advisory.DestinationListener; 030 import org.apache.activemq.advisory.DestinationSource; 031 import org.apache.activemq.command.ActiveMQDestination; 032 import org.apache.activemq.command.ActiveMQQueue; 033 import org.apache.activemq.command.ActiveMQTopic; 034 import org.apache.camel.CamelContext; 035 import org.apache.camel.CamelContextAware; 036 import org.apache.camel.Endpoint; 037 import org.apache.camel.component.jms.JmsEndpoint; 038 import org.apache.camel.component.jms.JmsQueueEndpoint; 039 import org.apache.camel.util.ObjectHelper; 040 import org.apache.commons.logging.Log; 041 import org.apache.commons.logging.LogFactory; 042 043 /** 044 * A helper bean which populates a {@link CamelContext} with ActiveMQ Queue endpoints 045 * 046 * @version $Revision: 1.1 $ 047 * @org.apache.xbean.XBean 048 */ 049 public class CamelEndpointLoader implements CamelContextAware { 050 private static final transient Log LOG = LogFactory.getLog(CamelEndpointLoader.class); 051 private CamelContext camelContext; 052 private EnhancedConnection connection; 053 private ConnectionFactory connectionFactory; 054 private ActiveMQComponent component; 055 056 public CamelEndpointLoader() { 057 } 058 059 public CamelEndpointLoader(CamelContext camelContext) { 060 this.camelContext = camelContext; 061 } 062 063 /** 064 * 065 * @throws Exception 066 * @org.apache.xbean.InitMethod 067 */ 068 @PostConstruct 069 public void afterPropertiesSet() throws Exception { 070 ObjectHelper.notNull(camelContext, "camelContext"); 071 if (connection == null) { 072 Connection value = getConnectionFactory().createConnection(); 073 if (value instanceof EnhancedConnection) { 074 connection = (EnhancedConnection) value; 075 } 076 else { 077 throw new IllegalArgumentException("Created JMS Connection is not an EnhancedConnection: " + value); 078 } 079 } 080 connection.start(); 081 DestinationSource source = connection.getDestinationSource(); 082 source.setDestinationListener(new DestinationListener() { 083 public void onDestinationEvent(DestinationEvent event) { 084 try { 085 ActiveMQDestination destination = event.getDestination(); 086 if (destination instanceof ActiveMQQueue) { 087 ActiveMQQueue queue = (ActiveMQQueue) destination; 088 if (event.isAddOperation()) { 089 addQueue(queue); 090 } 091 else { 092 removeQueue(queue); 093 } 094 } 095 else if (destination instanceof ActiveMQTopic) { 096 ActiveMQTopic topic = (ActiveMQTopic) destination; 097 if (event.isAddOperation()) { 098 addTopic(topic); 099 } 100 else { 101 removeTopic(topic); 102 } 103 } 104 } 105 catch (Exception e) { 106 LOG.warn("Caught: " + e, e); 107 } 108 } 109 }); 110 111 Set<ActiveMQQueue> queues = source.getQueues(); 112 for (ActiveMQQueue queue : queues) { 113 addQueue(queue); 114 } 115 116 Set<ActiveMQTopic> topics = source.getTopics(); 117 for (ActiveMQTopic topic : topics) { 118 addTopic(topic); 119 } 120 } 121 122 123 /** 124 * 125 * @throws Exception 126 * @org.apache.xbean.DestroyMethod 127 */ 128 @PreDestroy 129 public void destroy() throws Exception { 130 if (connection != null) { 131 connection.close(); 132 connection = null; 133 } 134 } 135 136 // Properties 137 //------------------------------------------------------------------------- 138 public CamelContext getCamelContext() { 139 return camelContext; 140 } 141 142 public void setCamelContext(CamelContext camelContext) { 143 this.camelContext = camelContext; 144 } 145 146 public EnhancedConnection getConnection() { 147 return connection; 148 } 149 150 public ConnectionFactory getConnectionFactory() { 151 if (connectionFactory == null 152 && getComponent().getConfiguration() instanceof ActiveMQConfiguration) { 153 connectionFactory = ((ActiveMQConfiguration) getComponent() 154 .getConfiguration()).createConnectionFactory(); 155 } 156 return connectionFactory; 157 } 158 159 public void setConnectionFactory(ConnectionFactory connectionFactory) { 160 this.connectionFactory = connectionFactory; 161 } 162 163 public ActiveMQComponent getComponent() { 164 if (component == null) { 165 component = camelContext.getComponent("activemq", ActiveMQComponent.class); 166 } 167 return component; 168 } 169 170 public void setComponent(ActiveMQComponent component) { 171 this.component = component; 172 } 173 174 // Implementation methods 175 //------------------------------------------------------------------------- 176 177 protected void addQueue(ActiveMQQueue queue) throws Exception { 178 String queueUri = getQueueUri(queue); 179 ActiveMQComponent jmsComponent = getComponent(); 180 Endpoint endpoint = new JmsQueueEndpoint(queueUri, jmsComponent, queue.getPhysicalName(), jmsComponent.getConfiguration()); 181 camelContext.addEndpoint(queueUri, endpoint); 182 } 183 184 protected String getQueueUri(ActiveMQQueue queue) { 185 return "activemq:" + queue.getPhysicalName(); 186 } 187 188 protected void removeQueue(ActiveMQQueue queue) throws Exception { 189 String queueUri = getQueueUri(queue); 190 camelContext.removeEndpoints(queueUri); 191 } 192 193 protected void addTopic(ActiveMQTopic topic) throws Exception { 194 String topicUri = getTopicUri(topic); 195 ActiveMQComponent jmsComponent = getComponent(); 196 Endpoint endpoint = new JmsEndpoint(topicUri, jmsComponent, topic.getPhysicalName(), true, jmsComponent.getConfiguration()); 197 camelContext.addEndpoint(topicUri, endpoint); 198 } 199 200 protected String getTopicUri(ActiveMQTopic topic) { 201 return "activemq:topic:" + topic.getPhysicalName(); 202 } 203 204 protected void removeTopic(ActiveMQTopic topic) throws Exception { 205 String topicUri = getTopicUri(topic); 206 camelContext.removeEndpoints(topicUri); 207 } 208 }