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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.multicast;
    19
    20  import org.apache.commons.logging.Log;
    21  import org.apache.commons.logging.LogFactory;
    22  import org.codehaus.activemq.message.WireFormat;
    23  import org.codehaus.activemq.transport.udp.UdpTransportChannel;
    24
    25  import javax.jms.JMSException;
    26  import java.io.IOException;
    27  import java.net.DatagramSocket;
    28  import java.net.MulticastSocket;
    29  import java.net.URI;
    30
    31  /***
    32   * A multicast implementation of a TransportChannel
    33   *
    34   * @version $Revision: 1.11 $
    35   */
    36  public class MulticastTransportChannel extends UdpTransportChannel {
    37
    38      private static final Log log = LogFactory.getLog(MulticastTransportChannel.class);
    39
    40      private boolean loopbackMode = false; // no loopback by default as we don't
    41      // need to see our own messages
    42
    43
    44      /***
    45       * Connect to a remote Node - e.g. a Broker
    46       *
    47       * @param remoteLocation
    48       * @throws JMSException
    49       */
    50      public MulticastTransportChannel(WireFormat wireFormat, URI remoteLocation) throws JMSException {
    51          super(wireFormat, remoteLocation);
    52      }
    53
    54      /***
    55       * @param socket
    56       * @throws JMSException
    57       */
    58      public MulticastTransportChannel(WireFormat wireFormat, MulticastSocket socket) throws JMSException {
    59          super(wireFormat, socket);
    60      }
    61
    62      public boolean isMulticast() {
    63          return true;
    64      }
    65
    66      /***
    67       * pretty print for object
    68       *
    69       * @return String representation of this object
    70       */
    71      public String toString() {
    72          return "MulticastTransportChannel: " + socket;
    73      }
    74
    75      protected void connect() throws IOException {
    76          MulticastSocket msocket = (MulticastSocket) socket;
    77
    78          //log.info("Creating multicast socket on port: " + port + " on
    79          msocket.setLoopbackMode(loopbackMode);
    80
    81          msocket.joinGroup(inetAddress);
    82      }
    83
    84      protected DatagramSocket createSocket(int port) throws IOException {
    85          return new MulticastSocket(port);
    86      }
    87
    88  }