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    1   /*
    2    *  Licensed to the Apache Software Foundation (ASF) under one
    3    *  or more contributor license agreements.  See the NOTICE file
    4    *  distributed with this work for additional information
    5    *  regarding copyright ownership.  The ASF licenses this file
    6    *  to you under the Apache License, Version 2.0 (the
    7    *  "License"); you may not use this file except in compliance
    8    *  with the License.  You may obtain a copy of the License at
    9    *
    10   *    http://www.apache.org/licenses/LICENSE-2.0
    11   *
    12   *  Unless required by applicable law or agreed to in writing,
    13   *  software distributed under the License is distributed on an
    14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    15   *  KIND, either express or implied.  See the License for the
    16   *  specific language governing permissions and limitations
    17   *  under the License.
    18   *
    19   */
    20  package org.apache.mina.example.chat.client;
    21
    22  import org.apache.mina.common.IoFilter;
    23  import org.apache.mina.common.IoHandler;
    24  import org.apache.mina.common.IoHandlerAdapter;
    25  import org.apache.mina.common.IoSession;
    26  import org.apache.mina.example.chat.ChatCommand;
    27  import org.apache.mina.filter.LoggingFilter;
    28  import org.apache.mina.filter.codec.ProtocolCodecFilter;
    29  import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
    30
    31  /**
    32   * {@link IoHandler} implementation of the client side of the simple chat protocol.
    33   *
    34   * @author The Apache Directory Project (mina-dev@directory.apache.org)
    35   * @version $Rev$, $Date$
    36   */
    37  public class SwingChatClientHandler extends IoHandlerAdapter {
    38
    39      public interface Callback {
    40          void connected();
    41
    42          void loggedIn();
    43
    44          void loggedOut();
    45
    46          void disconnected();
    47
    48          void messageReceived(String message);
    49
    50          void error(String message);
    51      }
    52
    53      private static IoFilter LOGGING_FILTER = new LoggingFilter();
    54
    55      private static IoFilter CODEC_FILTER = new ProtocolCodecFilter(
    56              new TextLineCodecFactory());
    57
    58      private final Callback callback;
    59
    60      public SwingChatClientHandler(Callback callback) {
    61          this.callback = callback;
    62      }
    63
    64      public void sessionCreated(IoSession session) throws Exception {
    65          session.getFilterChain().addLast("codec", CODEC_FILTER);
    66          session.getFilterChain().addLast("logger", LOGGING_FILTER);
    67      }
    68
    69      public void sessionOpened(IoSession session) throws Exception {
    70          callback.connected();
    71      }
    72
    73      public void messageReceived(IoSession session, Object message)
    74              throws Exception {
    75          String theMessage = (String) message;
    76          String[] result = theMessage.split(" ", 3);
    77          String status = result[1];
    78          String theCommand = result[0];
    79          ChatCommand command = ChatCommand.valueOf(theCommand);
    80
    81          if ("OK".equals(status)) {
    82
    83              switch (command.toInt()) {
    84
    85              case ChatCommand.BROADCAST:
    86                  if (result.length == 3) {
    87                      callback.messageReceived(result[2]);
    88                  }
    89                  break;
    90              case ChatCommand.LOGIN:
    91                  callback.loggedIn();
    92                  break;
    93
    94              case ChatCommand.QUIT:
    95                  callback.loggedOut();
    96                  break;
    97              }
    98
    99          } else {
    100             if (result.length == 3) {
    101                 callback.error(result[2]);
    102             }
    103         }
    104     }
    105
    106     public void sessionClosed(IoSession session) throws Exception {
    107         callback.disconnected();
    108     }
    109
    110 }