/**
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.activemq.camel.component;
import java.util.Set;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import org.apache.activemq.EnhancedConnection;
import org.apache.activemq.advisory.DestinationEvent;
import org.apache.activemq.advisory.DestinationListener;
import org.apache.activemq.advisory.DestinationSource;
import org.apache.activemq.command.ActiveMQDestination;
import org.apache.activemq.command.ActiveMQQueue;
import org.apache.activemq.command.ActiveMQTopic;
import org.apache.camel.CamelContext;
import org.apache.camel.CamelContextAware;
import org.apache.camel.Endpoint;
import org.apache.camel.component.jms.JmsEndpoint;
import org.apache.camel.component.jms.JmsQueueEndpoint;
import org.apache.camel.util.ObjectHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A helper bean which populates a {@link CamelContext} with ActiveMQ Queue endpoints
*
*
* @org.apache.xbean.XBean
*/
public class CamelEndpointLoader implements CamelContextAware {
private static final transient Logger LOG = LoggerFactory.getLogger(CamelEndpointLoader.class);
private CamelContext camelContext;
private EnhancedConnection connection;
private ConnectionFactory connectionFactory;
private ActiveMQComponent component;
public CamelEndpointLoader() {
}
public CamelEndpointLoader(CamelContext camelContext) {
this.camelContext = camelContext;
}
/**
*
* @throws Exception
* @org.apache.xbean.InitMethod
*/
@PostConstruct
public void afterPropertiesSet() throws Exception {
ObjectHelper.notNull(camelContext, "camelContext");
if (connection == null) {
Connection value = getConnectionFactory().createConnection();
if (value instanceof EnhancedConnection) {
connection = (EnhancedConnection) value;
}
else {
throw new IllegalArgumentException("Created JMS Connection is not an EnhancedConnection: " + value);
}
}
connection.start();
DestinationSource source = connection.getDestinationSource();
source.setDestinationListener(new DestinationListener() {
public void onDestinationEvent(DestinationEvent event) {
try {
ActiveMQDestination destination = event.getDestination();
if (destination instanceof ActiveMQQueue) {
ActiveMQQueue queue = (ActiveMQQueue) destination;
if (event.isAddOperation()) {
addQueue(queue);
}
else {
removeQueue(queue);
}
}
else if (destination instanceof ActiveMQTopic) {
ActiveMQTopic topic = (ActiveMQTopic) destination;
if (event.isAddOperation()) {
addTopic(topic);
}
else {
removeTopic(topic);
}
}
}
catch (Exception e) {
LOG.warn("Caught: " + e, e);
}
}
});
Set<ActiveMQQueue> queues = source.getQueues();
for (ActiveMQQueue queue : queues) {
addQueue(queue);
}
Set<ActiveMQTopic> topics = source.getTopics();
for (ActiveMQTopic topic : topics) {
addTopic(topic);
}
}
/**
*
* @throws Exception
* @org.apache.xbean.DestroyMethod
*/
@PreDestroy
public void destroy() throws Exception {
if (connection != null) {
connection.close();
connection = null;
}
}
// Properties
//-------------------------------------------------------------------------
public CamelContext getCamelContext() {
return camelContext;
}
public void setCamelContext(CamelContext camelContext) {
this.camelContext = camelContext;
}
public EnhancedConnection getConnection() {
return connection;
}
public ConnectionFactory getConnectionFactory() {
if (connectionFactory == null
&& getComponent().getConfiguration() instanceof ActiveMQConfiguration) {
connectionFactory = ((ActiveMQConfiguration) getComponent()
.getConfiguration()).createConnectionFactory();
}
return connectionFactory;
}
public void setConnectionFactory(ConnectionFactory connectionFactory) {
this.connectionFactory = connectionFactory;
}
public ActiveMQComponent getComponent() {
if (component == null) {
component = camelContext.getComponent("activemq", ActiveMQComponent.class);
}
return component;
}
public void setComponent(ActiveMQComponent component) {
this.component = component;
}
// Implementation methods
//-------------------------------------------------------------------------
protected void addQueue(ActiveMQQueue queue) throws Exception {
String queueUri = getQueueUri(queue);
ActiveMQComponent jmsComponent = getComponent();
Endpoint endpoint = new JmsQueueEndpoint(queueUri, jmsComponent, queue.getPhysicalName(), jmsComponent.getConfiguration());
camelContext.addEndpoint(queueUri, endpoint);
}
protected String getQueueUri(ActiveMQQueue queue) {
return "activemq:" + queue.getPhysicalName();
}
protected void removeQueue(ActiveMQQueue queue) throws Exception {
String queueUri = getQueueUri(queue);
// lur cache of endpoints so they will disappear in time
// this feature needs a new component api - list available endpoints
camelContext.removeEndpoints(queueUri);
}
protected void addTopic(ActiveMQTopic topic) throws Exception {
String topicUri = getTopicUri(topic);
ActiveMQComponent jmsComponent = getComponent();
Endpoint endpoint = new JmsEndpoint(topicUri, jmsComponent, topic.getPhysicalName(), true, jmsComponent.getConfiguration());
camelContext.addEndpoint(topicUri, endpoint);
}
protected String getTopicUri(ActiveMQTopic topic) {
return "activemq:topic:" + topic.getPhysicalName();
}
protected void removeTopic(ActiveMQTopic topic) throws Exception {
String topicUri = getTopicUri(topic);
// lur cache of endpoints so they will disappear in time
// this feature needs a new component api - list available endpoints
camelContext.removeEndpoints(topicUri);
}
}