/*
* 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 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;
final class LocalServerChannelSink extends AbstractChannelSink {
LocalServerChannelSink() {
}
@Override
public void eventSunk(ChannelPipeline pipeline, ChannelEvent e) throws Exception {
Channel channel = e.getChannel();
if (channel instanceof DefaultLocalServerChannel) {
handleServerChannel(e);
} else if (channel instanceof DefaultLocalChannel) {
handleAcceptedChannel(e);
}
}
private void handleServerChannel(ChannelEvent e) {
if (!(e instanceof ChannelStateEvent)) {
return;
}
ChannelStateEvent event = (ChannelStateEvent) e;
DefaultLocalServerChannel channel =
(DefaultLocalServerChannel) 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, (LocalAddress) value);
} else {
close(channel, future);
}
break;
}
}
private void handleAcceptedChannel(ChannelEvent e) {
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:
case CONNECTED:
if (value == null) {
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(DefaultLocalServerChannel channel, ChannelFuture future, LocalAddress localAddress) {
try {
if (!LocalChannelRegistry.register(localAddress, channel)) {
throw new ChannelException("address already in use: " + localAddress);
}
if (!channel.bound.compareAndSet(false, true)) {
throw new ChannelException("already bound");
}
channel.localAddress = localAddress;
future.setSuccess();
fireChannelBound(channel, localAddress);
} catch (Throwable t) {
LocalChannelRegistry.unregister(localAddress);
future.setFailure(t);
fireExceptionCaught(channel, t);
}
}
private void close(DefaultLocalServerChannel channel, ChannelFuture future) {
try {
if (channel.setClosed()) {
future.setSuccess();
LocalAddress localAddress = channel.localAddress;
if (channel.bound.compareAndSet(true, false)) {
channel.localAddress = null;
LocalChannelRegistry.unregister(localAddress);
fireChannelUnbound(channel);
}
fireChannelClosed(channel);
} else {
future.setSuccess();
}
} catch (Throwable t) {
future.setFailure(t);
fireExceptionCaught(channel, t);
}
}
}