NioServerSocketPipelineSink.java

package org.jboss.netty.channel.socket.nio;

import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelEvent;
import org.jboss.netty.channel.ChannelFuture;
import org.jboss.netty.channel.ChannelPipeline;
import org.jboss.netty.channel.ChannelState;
import org.jboss.netty.channel.ChannelStateEvent;
import org.jboss.netty.channel.MessageEvent;

import java.net.SocketAddress;

class NioServerSocketPipelineSink extends AbstractNioChannelSink {

    public void eventSunk( ChannelPipeline pipeline, ChannelEvent e) throws Exception {
        Channel channel = e.getChannel();
        if (channel instanceof NioServerSocketChannel) {
            handleServerSocket(e);
        } else if (channel instanceof NioSocketChannel) {
            handleAcceptedSocket(e);
        }
    }

    private static void handleServerSocket(ChannelEvent e) {
        if (!(e instanceof ChannelStateEvent)) {
            return;
        }

        ChannelStateEvent event = (ChannelStateEvent) e;
        NioServerSocketChannel channel =
            (NioServerSocketChannel) event.getChannel();
        ChannelFuture future = event.getFuture();
        ChannelState state = event.getState();
        Object value = event.getValue();

        switch (state) {
        case OPEN:
            if (Boolean.FALSE.equals(value)) {
                ((NioServerBoss) channel.boss).close(channel, future);
            }
            break;
        case BOUND:
            if (value != null) {
            	//���localaddress�ǿգ�����Ҫ���׽���
                ((NioServerBoss) channel.boss).bind(channel, future, (SocketAddress) value);
            } else {
                ((NioServerBoss) channel.boss).close(channel, future);
            }
            break;
        default:
            break;
        }
    }

    private static void handleAcceptedSocket(ChannelEvent e) {
        if (e instanceof ChannelStateEvent) {
            ChannelStateEvent event = (ChannelStateEvent) e;
            NioSocketChannel channel = (NioSocketChannel) event.getChannel();
            ChannelFuture future = event.getFuture();
            ChannelState state = event.getState();
            Object value = event.getValue();

            switch (state) {
            case OPEN:
                if (Boolean.FALSE.equals(value)) {
                    channel.worker.close(channel, future);
                }
                break;
            case BOUND:
            case CONNECTED:
                if (value == null) {
                    channel.worker.close(channel, future);
                }
                break;
            case INTEREST_OPS:
                channel.worker.setInterestOps(channel, future, ((Integer) value).intValue());
                break;
            }
        } else if (e instanceof MessageEvent) {
            MessageEvent event = (MessageEvent) e;
            NioSocketChannel channel = (NioSocketChannel) event.getChannel();
            boolean offered = channel.writeBufferQueue.offer(event);
            assert offered;
            channel.worker.writeFromUserCode(channel);
        }
    }
}