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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.core.buffer.IoBuffer;
    23  import org.apache.mina.core.service.IoHandler;
    24  import org.apache.mina.core.service.IoHandlerAdapter;
    25  import org.apache.mina.core.session.IdleStatus;
    26  import org.apache.mina.core.session.IoSession;
    27  import org.apache.mina.filter.ssl.SslFilter;
    28  import org.slf4j.Logger;
    29  import org.slf4j.LoggerFactory;
    30
    31  /**
    32   * {@link IoHandler} implementation for echo server.
    33   *
    34   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
    35   */
    36  public class EchoProtocolHandler extends IoHandlerAdapter {
    37      private final static Logger LOGGER = LoggerFactory.getLogger(EchoProtocolHandler.class);
    38
    39      @Override
    40      public void sessionCreated(IoSession session) {
    41          session.getConfig().setIdleTime(IdleStatus.BOTH_IDLE, 10);
    42
    43          // We're going to use SSL negotiation notification.
    44          session.setAttribute(SslFilter.USE_NOTIFICATION);
    45      }
    46
    47      @Override
    48      public void sessionClosed(IoSession session) throws Exception {
    49          LOGGER.info("CLOSED");
    50      }
    51
    52      @Override
    53      public void sessionOpened(IoSession session) throws Exception {
    54          LOGGER.info("OPENED");
    55      }
    56
    57      @Override
    58      public void sessionIdle(IoSession session, IdleStatus status) {
    59          LOGGER.info("*** IDLE #" + session.getIdleCount(IdleStatus.BOTH_IDLE) + " ***");
    60      }
    61
    62      @Override
    63      public void exceptionCaught(IoSession session, Throwable cause) {
    64          session.close(true);
    65      }
    66
    67      @Override
    68      public void messageReceived(IoSession session, Object message)
    69              throws Exception {
    70          LOGGER.info( "Received : " + message );
    71          // Write the received data back to remote peer
    72          session.write(((IoBuffer) message).duplicate());
    73      }
    74  }