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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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/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project 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.jboss.netty.channel.socket.oio;

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

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

import org.jboss.netty.channel.AbstractServerChannel;
import org.jboss.netty.channel.ChannelException;
import org.jboss.netty.channel.ChannelFactory;
import org.jboss.netty.channel.ChannelPipeline;
import org.jboss.netty.channel.ChannelSink;
import org.jboss.netty.channel.socket.DefaultServerSocketChannelConfig;
import org.jboss.netty.channel.socket.ServerSocketChannel;
import org.jboss.netty.channel.socket.ServerSocketChannelConfig;
import org.jboss.netty.logging.InternalLogger;
import org.jboss.netty.logging.InternalLoggerFactory;

class OioServerSocketChannel extends AbstractServerChannel
                             implements ServerSocketChannel {

    private static final InternalLogger logger =
        InternalLoggerFactory.getInstance(OioServerSocketChannel.class);

    final ServerSocket socket;
    final Lock shutdownLock = new ReentrantLock();
    private final ServerSocketChannelConfig config;

    OioServerSocketChannel(
            ChannelFactory factory,
            ChannelPipeline pipeline,
            ChannelSink sink) {

        super(factory, pipeline, sink);

        try {
            socket = new ServerSocket();
        } catch (IOException e) {
            throw new ChannelException(
                    "Failed to open a server socket.", e);
        }

        try {
            socket.setSoTimeout(1000);
        } catch (IOException e) {
            try {
                socket.close();
            } catch (IOException e2) {
                if (logger.isWarnEnabled()) {
                    logger.warn(
                            "Failed to close a partially initialized socket.", e2);
                }
            }
            throw new ChannelException(
                    "Failed to set the server socket timeout.", e);
        }

        config = new DefaultServerSocketChannelConfig(socket);

        fireChannelOpen(this);
    }

    public ServerSocketChannelConfig getConfig() {
        return config;
    }

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

    public InetSocketAddress getRemoteAddress() {
        return null;
    }

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

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