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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.echoserver;
    21
    22  import org.apache.mina.common.ByteBuffer;
    23  import org.apache.mina.common.IdleStatus;
    24  import org.apache.mina.common.IoHandler;
    25  import org.apache.mina.common.IoHandlerAdapter;
    26  import org.apache.mina.common.IoSession;
    27  import org.apache.mina.common.TransportType;
    28  import org.apache.mina.filter.SSLFilter;
    29  import org.apache.mina.transport.socket.nio.SocketSessionConfig;
    30  import org.slf4j.Logger;
    31  import org.slf4j.LoggerFactory;
    32
    33  /**
    34   * {@link IoHandler} implementation for echo server.
    35   *
    36   * @author The Apache Directory Project (mina-dev@directory.apache.org)
    37   * @version $Rev: 555855 $, $Date: 2007-07-13 12:19:00 +0900 (Fri, 13 Jul 2007) $,
    38   */
    39  public class EchoProtocolHandler extends IoHandlerAdapter {
    40      private static final Logger log = LoggerFactory
    41              .getLogger(EchoProtocolHandler.class);
    42
    43      public void sessionCreated(IoSession session) {
    44          if (session.getTransportType() == TransportType.SOCKET) {
    45              ((SocketSessionConfig) session.getConfig())
    46                      .setReceiveBufferSize(2048);
    47          }
    48
    49          session.setIdleTime(IdleStatus.BOTH_IDLE, 10);
    50
    51          // We're going to use SSL negotiation notification.
    52          session.setAttribute(SSLFilter.USE_NOTIFICATION);
    53      }
    54
    55      public void sessionIdle(IoSession session, IdleStatus status) {
    56          log.info("*** IDLE #" + session.getIdleCount(IdleStatus.BOTH_IDLE)
    57                  + " ***");
    58      }
    59
    60      public void exceptionCaught(IoSession session, Throwable cause) {
    61          cause.printStackTrace();
    62          session.close();
    63      }
    64
    65      public void messageReceived(IoSession session, Object message)
    66              throws Exception {
    67          if (!(message instanceof ByteBuffer)) {
    68              return;
    69          }
    70
    71          ByteBuffer rb = (ByteBuffer) message;
    72          // Write the received data back to remote peer
    73          ByteBuffer wb = ByteBuffer.allocate(rb.remaining());
    74          wb.put(rb);
    75          wb.flip();
    76          session.write(wb);
    77      }
    78  }