001 /**
002 *
003 * Copyright 2004 Protique Ltd
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * 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 **/
018 package org.activemq.transport;
019
020 import java.net.URI;
021 import java.net.URISyntaxException;
022 import java.util.Map;
023
024 import javax.jms.JMSException;
025
026 import org.activemq.io.WireFormat;
027 import org.activemq.transport.composite.CompositeTransportChannelFactory;
028 import org.activemq.util.BeanUtils;
029 import org.activemq.util.JMSExceptionHelper;
030 import org.activemq.util.URIHelper;
031
032 /**
033 * @version $Revision: 1.1.1.1 $
034 */
035 public abstract class DiscoveryTransportChannelFactorySupport extends CompositeTransportChannelFactory {
036 private DiscoveryAgent discoveryAgent;
037
038 public TransportChannel create(WireFormat wireFormat, URI remoteLocation) throws JMSException {
039 if (discoveryAgent == null) {
040 try {
041 discoveryAgent = createDiscoveryAgent(remoteLocation);
042 }
043 catch (URISyntaxException e) {
044 throw JMSExceptionHelper.newJMSException("Could not parse URI: " + remoteLocation + ". Reason: " + e, e);
045 }
046
047 // populate any properties on the discovery agent
048 discoveryAgent = populateAgentProperties(discoveryAgent, remoteLocation);
049 }
050 return new DiscoveryTransportChannel(wireFormat, discoveryAgent);
051 }
052
053 public DiscoveryAgent getDiscoveryAgent() {
054 return discoveryAgent;
055 }
056
057 public void setDiscoveryAgent(DiscoveryAgent discoveryAgent) {
058 this.discoveryAgent = discoveryAgent;
059 }
060
061 protected abstract DiscoveryAgent createDiscoveryAgent(URI remoteLocation) throws JMSException, URISyntaxException;
062
063 protected DiscoveryAgent populateAgentProperties(DiscoveryAgent agent, URI uri) throws JMSException {
064 Map properties = URIHelper.parseQuery(uri);
065 if (!properties.isEmpty()) {
066 BeanUtils.populate(agent, properties);
067 }
068 return agent;
069 }
070
071
072 }