View Javadoc

    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
    21  package org.apache.mina.examples.echoserver;
    22
    23  import java.net.InetSocketAddress;
    24  import java.net.SocketAddress;
    25  import java.nio.ByteBuffer;
    26
    27  import org.apache.mina.api.AbstractIoHandler;
    28  import org.apache.mina.api.IoSession;
    29  import org.apache.mina.filter.logging.LoggingFilter;
    30  import org.apache.mina.transport.nio.NioTcpServer;
    31  import org.slf4j.Logger;
    32  import org.slf4j.LoggerFactory;
    33
    34  /**
    35   * A simple TCP server, write back to the client every received messages.
    36   *
    37   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
    38   *
    39   */
    40  public class NioEchoServer {
    41
    42      static final private Logger LOG = LoggerFactory.getLogger(NioEchoServer.class);
    43
    44      public static void main(final String[] args) {
    45          LOG.info("starting echo server");
    46
    47          final NioTcpServer acceptor = new NioTcpServer();
    48
    49          // create the filter chain for this service
    50          acceptor.setFilters(new LoggingFilter("LoggingFilter1"));
    51
    52          acceptor.setIoHandler(new AbstractIoHandler() {
    53              @Override
    54              public void sessionOpened(final IoSession session) {
    55                  LOG.info("session opened {}", session);
    56
    57                  final String welcomeStr = "welcome\n";
    58                  final ByteBuffer bf = ByteBuffer.allocate(welcomeStr.length());
    59                  bf.put(welcomeStr.getBytes());
    60                  bf.flip();
    61                  session.write(bf);
    62              }
    63
    64              @Override
    65              public void messageReceived(IoSession session, Object message) {
    66                  if (message instanceof ByteBuffer) {
    67                      LOG.info("echoing");
    68                      session.write(message);
    69                  }
    70              }
    71          });
    72          try {
    73              final SocketAddress address = new InetSocketAddress(9999);
    74              acceptor.bind(address);
    75              LOG.debug("Running the server for 25 sec");
    76              Thread.sleep(25000);
    77              LOG.debug("Unbinding the TCP port");
    78              acceptor.unbind();
    79          } catch (final InterruptedException e) {
    80              LOG.error("Interrupted exception", e);
    81          }
    82      }
    83  }