/*
* Copyright 2011 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 io.netty.channel.local;
import static io.netty.channel.Channels.*;
import java.io.IOException;
import java.net.ConnectException;
import io.netty.channel.AbstractChannelSink;
import io.netty.channel.Channel;
import io.netty.channel.ChannelEvent;
import io.netty.channel.ChannelException;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.ChannelState;
import io.netty.channel.ChannelStateEvent;
import io.netty.channel.MessageEvent;
import io.netty.logging.InternalLogger;
import io.netty.logging.InternalLoggerFactory;
/**
*/
final class LocalClientChannelSink extends AbstractChannelSink {
private static final InternalLogger logger = InternalLoggerFactory.getInstance(LocalClientChannelSink.class);
LocalClientChannelSink() {
}
@Override
public void eventSunk(ChannelPipeline pipeline, ChannelEvent e) throws Exception {
if (e instanceof ChannelStateEvent) {
ChannelStateEvent event = (ChannelStateEvent) e;
DefaultLocalChannel channel =
(DefaultLocalChannel) event.getChannel();
ChannelFuture future = event.getFuture();
ChannelState state = event.getState();
Object value = event.getValue();
switch (state) {
case OPEN:
if (Boolean.FALSE.equals(value)) {
channel.closeNow(future);
}
break;
case BOUND:
if (value != null) {
bind(channel, future, (LocalAddress) value);
} else {
channel.closeNow(future);
}
break;
case CONNECTED:
if (value != null) {
connect(channel, future, (LocalAddress) value);
} else {
channel.closeNow(future);
}
break;
case INTEREST_OPS:
// Unsupported - discard silently.
future.setSuccess();
break;
}
} else if (e instanceof MessageEvent) {
MessageEvent event = (MessageEvent) e;
DefaultLocalChannel channel = (DefaultLocalChannel) event.getChannel();
boolean offered = channel.writeBuffer.offer(event);
assert offered;
channel.flushWriteBuffer();
}
}
private void bind(DefaultLocalChannel channel, ChannelFuture future, LocalAddress localAddress) {
try {
if (!LocalChannelRegistry.register(localAddress, channel)) {
throw new ChannelException("address already in use: " + localAddress);
}
channel.setBound();
channel.localAddress = localAddress;
future.setSuccess();
fireChannelBound(channel, localAddress);
} catch (Throwable t) {
LocalChannelRegistry.unregister(localAddress);
future.setFailure(t);
fireExceptionCaught(channel, t);
}
}
private void connect(DefaultLocalChannel channel, ChannelFuture future, LocalAddress remoteAddress) {
Channel remoteChannel = LocalChannelRegistry.getChannel(remoteAddress);
if (!(remoteChannel instanceof DefaultLocalServerChannel)) {
future.setFailure(new ConnectException("connection refused"));
return;
}
DefaultLocalServerChannel serverChannel = (DefaultLocalServerChannel) remoteChannel;
ChannelPipeline pipeline;
try {
pipeline = serverChannel.getConfig().getPipelineFactory().getPipeline();
} catch (Exception e) {
future.setFailure(e);
fireExceptionCaught(channel, e);
if (logger.isWarnEnabled()) {
logger.warn(
"Failed to initialize an accepted socket.", e);
}
return;
}
future.setSuccess();
DefaultLocalChannel acceptedChannel = DefaultLocalChannel.create(serverChannel, serverChannel.getFactory(), pipeline, this, channel);
channel.pairedChannel = acceptedChannel;
bind(channel, succeededFuture(channel), new LocalAddress(LocalAddress.EPHEMERAL));
channel.remoteAddress = serverChannel.getLocalAddress();
channel.setConnected();
fireChannelConnected(channel, serverChannel.getLocalAddress());
acceptedChannel.localAddress = serverChannel.getLocalAddress();
try {
acceptedChannel.setBound();
} catch (IOException e) {
throw new Error(e);
}
fireChannelBound(acceptedChannel, channel.getRemoteAddress());
acceptedChannel.remoteAddress = channel.getLocalAddress();
acceptedChannel.setConnected();
fireChannelConnected(acceptedChannel, channel.getLocalAddress());
// Flush something that was written in channelBound / channelConnected
channel.flushWriteBuffer();
acceptedChannel.flushWriteBuffer();
}
}