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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.netcat;
    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
    28  /**
    29   * {@link IoHandler} implementation for NetCat client.  This class extended
    30   * {@link IoHandlerAdapter} for convenience.
    31   *
    32   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
    33   */
    34  public class NetCatProtocolHandler extends IoHandlerAdapter {
    35      @Override
    36      public void sessionOpened(IoSession session) {
    37          // Set reader idle time to 10 seconds.
    38          // sessionIdle(...) method will be invoked when no data is read
    39          // for 10 seconds.
    40          session.getConfig().setIdleTime(IdleStatus.READER_IDLE, 10);
    41      }
    42
    43      @Override
    44      public void sessionClosed(IoSession session) {
    45          // Print out total number of bytes read from the remote peer.
    46          System.err.println("Total " + session.getReadBytes() + " byte(s)");
    47      }
    48
    49      @Override
    50      public void sessionIdle(IoSession session, IdleStatus status) {
    51          // Close the connection if reader is idle.
    52          if (status == IdleStatus.READER_IDLE) {
    53              session.close(true);
    54          }
    55      }
    56
    57      @Override
    58      public void messageReceived(IoSession session, Object message) {
    59          IoBuffer buf = (IoBuffer) message;
    60          // Print out read buffer content.
    61          while (buf.hasRemaining()) {
    62              System.out.print((char) buf.get());
    63          }
    64          System.out.flush();
    65      }
    66  }