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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.vm;
19  
20  import EDU.oswego.cs.dl.util.concurrent.SynchronizedBoolean;
21  import org.apache.commons.logging.Log;
22  import org.apache.commons.logging.LogFactory;
23  import org.codehaus.activemq.transport.TransportServerChannelSupport;
24  
25  import javax.jms.JMSException;
26  import java.net.URI;
27  
28  /***
29   * A VM implementation of TransportServerChannel
30   *
31   * @version $Revision: 1.8 $
32   */
33  public class VmTransportServerChannel extends TransportServerChannelSupport {
34  
35      private static final Log log = LogFactory.getLog(VmTransportServerChannel.class);
36  
37      private SynchronizedBoolean started;
38  
39      public VmTransportServerChannel(URI bindAddr) {
40          super(bindAddr);
41          started = new SynchronizedBoolean(false);
42      }
43  
44      /***
45       * start listeneing for events
46       *
47       * @throws JMSException if an error occurs
48       */
49      public void start() throws JMSException {
50          if (started.commit(false, true)) {
51              log.info("Listening for connections at: " + getUrl());
52          }
53      }
54  
55      /***
56       * @return pretty print of this
57       */
58      public String toString() {
59          return "VmTransportServerChannel@" + getUrl();
60      }
61  
62  }