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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
    23  import javax.jms.JMSException;
    24  import java.util.ArrayList;
    25  import java.util.Iterator;
    26  import java.util.List;
    27
    28  /***
    29   * An abstract base class useful for implementation inheritence
    30   *
    31   * @version $Revision: 1.3 $
    32   */
    33  public abstract class TransportServerChannelSupport implements TransportServerChannel {
    34
    35      private static final Log log = LogFactory.getLog(TransportServerChannelSupport.class);
    36
    37      private TransportChannelListener listener;
    38      private List channels = new ArrayList();
    39
    40      public void start() throws JMSException {
    41          if (listener == null) {
    42              throw new JMSException("Must have a TransportChannelListener attached!");
    43          }
    44      }
    45
    46      public synchronized void stop() {
    47          for (Iterator iter = channels.iterator(); iter.hasNext();) {
    48              TransportChannel channel = (TransportChannel) iter.next();
    49              channel.stop();
    50          }
    51      }
    52
    53      public void setTransportChannelListener(TransportChannelListener listener) {
    54          this.listener = listener;
    55      }
    56
    57      protected synchronized void addClient(TransportChannel channel) {
    58          if (listener == null) {
    59              log.warn("No listener attached, cannot add channel: " + channel);
    60          }
    61          else {
    62              listener.addClient(channel);
    63              channel.setTransportChannelListener(listener);
    64              channels.add(channel);
    65          }
    66      }
    67  }