001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *
010 *    http://www.apache.org/licenses/LICENSE-2.0
011 *
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License.
018 *
019 */
020package org.apache.mina.example.netcat;
021
022import org.apache.mina.core.buffer.IoBuffer;
023import org.apache.mina.core.service.IoHandler;
024import org.apache.mina.core.service.IoHandlerAdapter;
025import org.apache.mina.core.session.IdleStatus;
026import org.apache.mina.core.session.IoSession;
027
028/**
029 * {@link IoHandler} implementation for NetCat client.  This class extended
030 * {@link IoHandlerAdapter} for convenience.
031 *
032 * @author <a href="http://mina.apache.org">Apache MINA Project</a>
033 */
034public class NetCatProtocolHandler extends IoHandlerAdapter {
035    @Override
036    public void sessionOpened(IoSession session) {
037        // Set reader idle time to 10 seconds.
038        // sessionIdle(...) method will be invoked when no data is read
039        // for 10 seconds.
040        session.getConfig().setIdleTime(IdleStatus.READER_IDLE, 10);
041    }
042
043    @Override
044    public void sessionClosed(IoSession session) {
045        // Print out total number of bytes read from the remote peer.
046        System.err.println("Total " + session.getReadBytes() + " byte(s)");
047    }
048
049    @Override
050    public void sessionIdle(IoSession session, IdleStatus status) {
051        // Close the connection if reader is idle.
052        if (status == IdleStatus.READER_IDLE) {
053            session.closeNow();
054        }
055    }
056
057    @Override
058    public void messageReceived(IoSession session, Object message) {
059        IoBuffer buf = (IoBuffer) message;
060        // Print out read buffer content.
061        while (buf.hasRemaining()) {
062            System.out.print((char) buf.get());
063        }
064        System.out.flush();
065    }
066}