/*
* Copyright (C) 2008 Trustin Heuiseung Lee
*
* This library 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 library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA
*/
package net.gleamynode.netty.channel.socket.nio;
import static net.gleamynode.netty.channel.Channels.*;
import java.io.IOException;
import java.net.SocketAddress;
import java.net.SocketTimeoutException;
import java.nio.channels.SocketChannel;
import java.util.concurrent.Executor;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.logging.Level;
import java.util.logging.Logger;
import net.gleamynode.netty.channel.AbstractChannelSink;
import net.gleamynode.netty.channel.Channel;
import net.gleamynode.netty.channel.ChannelEvent;
import net.gleamynode.netty.channel.ChannelFuture;
import net.gleamynode.netty.channel.ChannelPipeline;
import net.gleamynode.netty.channel.ChannelState;
import net.gleamynode.netty.channel.ChannelStateEvent;
import net.gleamynode.netty.channel.MessageEvent;
import net.gleamynode.netty.util.NamePreservingRunnable;
class NioServerSocketPipelineSink extends AbstractChannelSink {
static final Logger logger =
Logger.getLogger(NioServerSocketPipelineSink.class.getName());
private static final AtomicInteger nextId = new AtomicInteger();
private final int id = nextId.incrementAndGet();
private final NioWorker[] workers;
private final AtomicInteger workerIndex = new AtomicInteger();
NioServerSocketPipelineSink(Executor workerExecutor, int workerCount) {
workers = new NioWorker[workerCount];
for (int i = 0; i < workers.length; i ++) {
workers[i] = new NioWorker(id, i + 1, workerExecutor);
}
}
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 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)) {
close(channel, future);
}
break;
case BOUND:
if (value != null) {
bind(channel, future, (SocketAddress) value);
} else {
close(channel, future);
}
break;
}
}
private 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)) {
NioWorker.close(channel, future);
}
break;
case BOUND:
case CONNECTED:
if (value == null) {
NioWorker.close(channel, future);
}
break;
case INTEREST_OPS:
NioWorker.setInterestOps(channel, future, ((Integer) value).intValue());
break;
}
} else if (e instanceof MessageEvent) {
MessageEvent event = (MessageEvent) e;
NioSocketChannel channel = (NioSocketChannel) event.getChannel();
channel.writeBuffer.offer(event);
NioWorker.write(channel);
}
}
private void bind(
NioServerSocketChannel channel, ChannelFuture future,
SocketAddress localAddress) {
boolean bound = false;
boolean bossStarted = false;
try {
channel.socket.socket().bind(localAddress, channel.getConfig().getBacklog());
bound = true;
future.setSuccess();
fireChannelBound(channel, channel.getLocalAddress());
Executor bossExecutor =
((NioServerSocketChannelFactory) channel.getFactory()).bossExecutor;
bossExecutor.execute(new NamePreservingRunnable(
new Boss(channel),
"New I/O server boss #" + id +" (channelId: " + channel.getId() +
", " + channel.getLocalAddress() + ')'));
bossStarted = true;
} catch (Throwable t) {
future.setFailure(t);
fireExceptionCaught(channel, t);
} finally {
if (!bossStarted && bound) {
close(channel, future);
}
}
}
private void close(NioServerSocketChannel channel, ChannelFuture future) {
boolean bound = channel.isBound();
try {
channel.socket.close();
future.setSuccess();
if (channel.setClosed()) {
if (bound) {
fireChannelUnbound(channel);
}
fireChannelClosed(channel);
}
} catch (Throwable t) {
future.setFailure(t);
fireExceptionCaught(channel, t);
}
}
NioWorker nextWorker() {
return workers[Math.abs(
workerIndex.getAndIncrement() % workers.length)];
}
private class Boss implements Runnable {
private final NioServerSocketChannel channel;
private volatile boolean started;
Boss(NioServerSocketChannel channel) {
this.channel = channel;
}
public void run() {
started = true;
do {
try {
SocketChannel acceptedSocket = channel.socket.accept();
try {
ChannelPipeline pipeline =
channel.getConfig().getPipelineFactory().getPipeline();
NioWorker worker = nextWorker();
worker.register(new NioAcceptedSocketChannel(
channel.getFactory(), pipeline, channel,
NioServerSocketPipelineSink.this,
acceptedSocket, worker));
} catch (Exception e) {
logger.log(
Level.WARNING,
"Failed to initialize an accepted socket.",
e);
try {
acceptedSocket.close();
} catch (IOException e2) {
logger.log(
Level.WARNING,
"Failed to close a partially accepted socket.",
e2);
}
}
} catch (SocketTimeoutException e) {
// Thrown every second to stop when requested.
} catch (IOException e) {
logger.log(
Level.WARNING,
"Failed to accept a connection.", e);
try {
Thread.sleep(1000);
} catch (InterruptedException e1) {
// Ignore
}
}
} while (started);
}
}
}