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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.socket.oio;

import java.io.OutputStream;
import java.io.PushbackInputStream;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;

import org.jboss.netty.channel.AbstractChannel;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelFactory;
import org.jboss.netty.channel.ChannelFuture;
import org.jboss.netty.channel.ChannelPipeline;
import org.jboss.netty.channel.ChannelSink;
import org.jboss.netty.channel.socket.DefaultSocketChannelConfig;
import org.jboss.netty.channel.socket.SocketChannel;
import org.jboss.netty.channel.socket.SocketChannelConfig;

/**
 *
 * @author The Netty Project ([email protected])
 * @author Trustin Lee ([email protected])
 *
 * @version $Rev: 794 $, $Date: 2009-02-09 16:34:49 +0900 (Mon, 09 Feb 2009) $
 *
 */
abstract class OioSocketChannel extends AbstractChannel
                                implements SocketChannel {

    final Socket socket;
    private final SocketChannelConfig config;
    volatile Thread workerThread;

    OioSocketChannel(
            Channel parent,
            ChannelFactory factory,
            ChannelPipeline pipeline,
            ChannelSink sink,
            Socket socket) {

        super(parent, factory, pipeline, sink);

        this.socket = socket;
        config = new DefaultSocketChannelConfig(socket);
    }

    public SocketChannelConfig getConfig() {
        return config;
    }

    public InetSocketAddress getLocalAddress() {
        return (InetSocketAddress) socket.getLocalSocketAddress();
    }

    public InetSocketAddress getRemoteAddress() {
        return (InetSocketAddress) socket.getRemoteSocketAddress();
    }

    public boolean isBound() {
        return isOpen() && socket.isBound();
    }

    public boolean isConnected() {
        return isOpen() && socket.isConnected();
    }

    @Override
    protected boolean setClosed() {
        return super.setClosed();
    }

    @Override
    protected void setInterestOpsNow(int interestOps) {
        super.setInterestOpsNow(interestOps);
    }

    abstract PushbackInputStream getInputStream();
    abstract OutputStream getOutputStream();

    @Override
    public ChannelFuture write(Object message, SocketAddress remoteAddress) {
        if (remoteAddress == null || remoteAddress.equals(getRemoteAddress())) {
            return super.write(message, null);
        } else {
            return getUnsupportedOperationFuture();
        }
    }
}