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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 java.net.SocketAddress;
    23
    24  import javax.net.ssl.SSLContext;
    25
    26  import org.apache.mina.core.filterchain.IoFilter;
    27  import org.apache.mina.core.future.ConnectFuture;
    28  import org.apache.mina.core.service.IoHandler;
    29  import org.apache.mina.core.session.IoSession;
    30  import org.apache.mina.example.echoserver.ssl.BogusSslContextFactory;
    31  import org.apache.mina.filter.ssl.SslFilter;
    32  import org.apache.mina.filter.codec.ProtocolCodecFilter;
    33  import org.apache.mina.filter.codec.textline.TextLineCodecFactory;
    34  import org.apache.mina.filter.logging.LoggingFilter;
    35  import org.apache.mina.filter.logging.MdcInjectionFilter;
    36  import org.apache.mina.transport.socket.nio.NioSocketConnector;
    37
    38  /**
    39   * A simple chat client for a given user.
    40   *
    41   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
    42   */
    43  public class ChatClientSupport {
    44      private final IoHandler handler;
    45
    46      private final String name;
    47
    48      private IoSession session;
    49
    50      public ChatClientSupport(String name, IoHandler handler) {
    51          if (name == null) {
    52              throw new IllegalArgumentException("Name can not be null");
    53          }
    54          this.name = name;
    55          this.handler = handler;
    56      }
    57
    58      public boolean connect(NioSocketConnector connector, SocketAddress address,
    59              boolean useSsl) {
    60          if (session != null && session.isConnected()) {
    61              throw new IllegalStateException(
    62                      "Already connected. Disconnect first.");
    63          }
    64
    65          try {
    66              IoFilter LOGGING_FILTER = new LoggingFilter();
    67
    68              IoFilter CODEC_FILTER = new ProtocolCodecFilter(
    69                      new TextLineCodecFactory());
    70
    71              connector.getFilterChain().addLast("mdc", new MdcInjectionFilter());
    72              connector.getFilterChain().addLast("codec", CODEC_FILTER);
    73              connector.getFilterChain().addLast("logger", LOGGING_FILTER);
    74
    75              if (useSsl) {
    76                  SSLContext sslContext = BogusSslContextFactory
    77                          .getInstance(false);
    78                  SslFilter sslFilter = new SslFilter(sslContext);
    79                  sslFilter.setUseClientMode(true);
    80                  connector.getFilterChain().addFirst("sslFilter", sslFilter);
    81              }
    82
    83              connector.setHandler(handler);
    84              ConnectFuture future1 = connector.connect(address);
    85              future1.awaitUninterruptibly();
    86              if (!future1.isConnected()) {
    87                  return false;
    88              }
    89              session = future1.getSession();
    90              login();
    91
    92              return true;
    93          } catch (Exception e) {
    94              return false;
    95          }
    96      }
    97
    98      public void login() {
    99          session.write("LOGIN " + name);
    100     }
    101
    102     public void broadcast(String message) {
    103         session.write("BROADCAST " + message);
    104     }
    105
    106     public void quit() {
    107         if (session != null) {
    108             if (session.isConnected()) {
    109                 session.write("QUIT");
    110                 // Wait until the chat ends.
    111                 session.getCloseFuture().awaitUninterruptibly();
    112             }
    113             session.close(true);
    114         }
    115     }
    116
    117 }