netcatprotocolhandler.java

mina是以Java实现的一个开源的网络程序框架

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 *  Licensed to the Apache Software Foundation (ASF) under one
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 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 *
 */
package org.apache.mina.example.netcat;

import org.apache.mina.core.buffer.IoBuffer;
import org.apache.mina.core.service.IoHandler;
import org.apache.mina.core.service.IoHandlerAdapter;
import org.apache.mina.core.session.IdleStatus;
import org.apache.mina.core.session.IoSession;

/**
 * {@link IoHandler} implementation for NetCat client.  This class extended
 * {@link IoHandlerAdapter} for convenience.
 *
 * @author The Apache MINA Project ([e-mail])
 * @version $Rev: 713957 $, $Date: 2008-11-14 10:27:16 +0100 (Fri, 14 Nov 2008) $,
 */
public class NetCatProtocolHandler extends IoHandlerAdapter {
    @Override
    public void sessionOpened(IoSession session) {
        // Set reader idle time to 10 seconds.
        // sessionIdle(...) method will be invoked when no data is read
        // for 10 seconds.
        session.getConfig().setIdleTime(IdleStatus.READER_IDLE, 10);
    }

    @Override
    public void sessionClosed(IoSession session) {
        // Print out total number of bytes read from the remote peer.
        System.err.println("Total " + session.getReadBytes() + " byte(s)");
    }

    @Override
    public void sessionIdle(IoSession session, IdleStatus status) {
        // Close the connection if reader is idle.
        if (status == IdleStatus.READER_IDLE) {
            session.close(true);
        }
    }

    @Override
    public void messageReceived(IoSession session, Object message) {
        IoBuffer buf = (IoBuffer) message;
        // Print out read buffer content.
        while (buf.hasRemaining()) {
            System.out.print((char) buf.get());
        }
        System.out.flush();
    }
}