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1   /*** 
2    * 
3    * Copyright 2004 Protique Ltd
4    * 
5    * Licensed under the Apache License, Version 2.0 (the "License"); 
6    * you may not use this file except in compliance with the License. 
7    * You may obtain a copy of the License at 
8    * 
9    * http://www.apache.org/licenses/LICENSE-2.0
10   * 
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS, 
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
14   * See the License for the specific language governing permissions and 
15   * limitations under the License. 
16   * 
17   **/
18  package org.codehaus.activemq.transport;
19  
20  import org.apache.commons.logging.Log;
21  import org.apache.commons.logging.LogFactory;
22  import org.codehaus.activemq.broker.BrokerContainer;
23  import org.codehaus.activemq.service.Service;
24  
25  import javax.jms.JMSException;
26  import java.util.ArrayList;
27  import java.util.Iterator;
28  import java.util.List;
29  
30  /***
31   * Represents a connector to one or more remote brokers.
32   * This class manages a number of {@link NetworkChannel} instances
33   * which may or may not be connected to a
34   * remote broker at any point in time.
35   * <p/>
36   * The implementation of this class could use a fixed number of
37   * configured {@link NetworkChannel} instances or could use
38   * discovery to find them.
39   *
40   * @version $Revision: 1.4 $
41   */
42  public class NetworkConnector implements Service {
43      private static final Log log = LogFactory.getLog(NetworkConnector.class);
44  
45      private BrokerContainer brokerContainer;
46      private TransportChannelListener transportChannelListener;
47      private List networkChannels = new ArrayList();
48  
49      public NetworkConnector(BrokerContainer brokerContainer) {
50          this.brokerContainer = brokerContainer;
51      }
52  
53      public void start() throws JMSException {
54          for (Iterator iter = networkChannels.iterator(); iter.hasNext();) {
55              NetworkChannel networkChannel = (NetworkChannel) iter.next();
56              networkChannel.setBrokerContainer(getBrokerContainer());
57              networkChannel.start();
58          }
59      }
60  
61      public void stop() throws JMSException {
62          for (Iterator iter = networkChannels.iterator(); iter.hasNext();) {
63              NetworkChannel networkChannel = (NetworkChannel) iter.next();
64              try {
65                  networkChannel.stop();
66              }
67              catch (JMSException e) {
68                  log.warn("Failed to stop network channel: " + e, e);
69              }
70          }
71      }
72  
73      public void setTransportChannelListener(TransportChannelListener listener) {
74          this.transportChannelListener = listener;
75      }
76  
77  
78      // Properties
79      //-------------------------------------------------------------------------
80      public BrokerContainer getBrokerContainer() {
81          return brokerContainer;
82      }
83  
84      public List getNetworkChannels() {
85          return networkChannels;
86      }
87  
88      /***
89       * Sets a list of {@link NetworkChannel} instances
90       *
91       * @param networkChannels
92       */
93      public void setNetworkChannels(List networkChannels) {
94          this.networkChannels = networkChannels;
95      }
96  
97      /***
98       * Adds a new network channel for the given URI
99       *
100      * @param uri
101      * @return
102      */
103     public NetworkChannel addNetworkChannel(String uri) {
104         NetworkChannel networkChannel = new NetworkChannel(brokerContainer, uri);
105         addNetworkChannel(networkChannel);
106         return networkChannel;
107     }
108 
109     /***
110      * Adds a new network channel
111      */
112     public void addNetworkChannel(NetworkChannel networkChannel) {
113         networkChannels.add(networkChannel);
114     }
115 
116     /***
117      * Removes a network channel
118      */
119     public void removeNetworkChannel(NetworkChannel networkChannel) {
120         networkChannels.remove(networkChannel);
121     }
122 }