netcatprotocolhandler.java

利用mina框架写的一个通信实例。初学者的一个好教程。

/*
 *   @(#) $Id: NetCatProtocolHandler.java 357871 2005-12-20 01:56:40Z trustin $
 *
 *   Copyright 2004 The Apache Software Foundation
 *
 *   Licensed 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.examples.netcat;

import org.apache.mina.common.ByteBuffer;
import org.apache.mina.common.IdleStatus;
import org.apache.mina.io.IoHandler;
import org.apache.mina.io.IoHandlerAdapter;
import org.apache.mina.io.IoSession;

/**
 * {@link IoHandler} implementation for NetCat client. This class extended
 * {@link IoHandlerAdapter} for convenience.
 * 
 * @author The Apache Directory Project ([e-mail])
 * @version $Rev: 357871 $, $Date: 2005-12-20 10:56:40 +0900 (Tue, 20 Dec 2005) $,
 */
public class NetCatProtocolHandler extends IoHandlerAdapter {
	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);
	}

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

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

	public void dataRead(IoSession session, ByteBuffer buf) {
		// Print out read buffer content.
		while (buf.hasRemaining()) {
			System.out.print((char) buf.get());
		}
		System.out.flush();
	}
}