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The Netty project is an effort to provide an asynchronous event-driven network application framework and tools for rapid development of maintainable high performance and high scalability protocol servers and clients. In other words, Netty is a NIO client server framework which enables quick and easy development of network applications such as protocol servers and clients. It greatly simplifies and streamlines network programming such as TCP and UDP socket server.

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/*
 * JBoss, Home of Professional Open Source
 *
 * Copyright 2008, Red Hat Middleware LLC, and individual contributors
 * by the @author tags. See the COPYRIGHT.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jboss.netty.channel;

import static org.jboss.netty.channel.Channels.*;

import java.net.SocketAddress;

import org.jboss.netty.util.internal.StringUtil;

/**
 * The default {@link MessageEvent} implementation.
 *
 * @author The Netty Project ([email protected])
 * @author Trustin Lee ([email protected])
 *
 * @version $Rev: 1124 $, $Date: 2009-04-03 16:41:54 +0900 (Fri, 03 Apr 2009) $
 *
 */
public class UpstreamMessageEvent implements MessageEvent {

    private final Channel channel;
    private final Object message;
    private final SocketAddress remoteAddress;

    /**
     * Creates a new instance.
     */
    public UpstreamMessageEvent(
            Channel channel, Object message, SocketAddress remoteAddress) {

        if (channel == null) {
            throw new NullPointerException("channel");
        }
        if (message == null) {
            throw new NullPointerException("message");
        }
        this.channel = channel;
        this.message = message;
        this.remoteAddress = remoteAddress;
    }

    public Channel getChannel() {
        return channel;
    }

    public ChannelFuture getFuture() {
        return succeededFuture(getChannel());
    }

    public Object getMessage() {
        return message;
    }

    public SocketAddress getRemoteAddress() {
        return remoteAddress;
    }

    @Override
    public String toString() {
        if (getRemoteAddress() == null) {
            return getChannel().toString() + " RECEIVED: " +
                   StringUtil.stripControlCharacters(getMessage());
        } else {
            return getChannel().toString() + " RECEIVED: " +
                   StringUtil.stripControlCharacters(getMessage()) + ", " +
                   getRemoteAddress();
        }
    }
}