/*
* 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 io.netty.channel.group;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.util.concurrent.BlockingOperationException;
import io.netty.util.concurrent.DefaultPromise;
import io.netty.util.concurrent.EventExecutor;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.GenericFutureListener;
import io.netty.util.concurrent.ImmediateEventExecutor;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
/**
* The default {@link ChannelGroupFuture} implementation.
*/
final class DefaultChannelGroupFuture extends DefaultPromise<Void> implements ChannelGroupFuture {
private final ChannelGroup group;
private final Map<Channel, ChannelFuture> futures;
private int successCount;
private int failureCount;
private final ChannelFutureListener childListener = new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
boolean success = future.isSuccess();
boolean callSetDone;
synchronized (DefaultChannelGroupFuture.this) {
if (success) {
successCount ++;
} else {
failureCount ++;
}
callSetDone = successCount + failureCount == futures.size();
assert successCount + failureCount <= futures.size();
}
if (callSetDone) {
if (failureCount > 0) {
List<Map.Entry<Channel, Throwable>> failed =
new ArrayList<Map.Entry<Channel, Throwable>>(failureCount);
for (ChannelFuture f: futures.values()) {
if (!f.isSuccess()) {
failed.add(new DefaultEntry<Channel, Throwable>(f.channel(), f.cause()));
}
}
setFailure0(new ChannelGroupException(failed));
} else {
setSuccess0();
}
}
}
};
/**
* Creates a new instance.
*/
DefaultChannelGroupFuture(ChannelGroup group, Collection<ChannelFuture> futures, EventExecutor executor) {
super(executor);
if (group == null) {
throw new NullPointerException("group");
}
if (futures == null) {
throw new NullPointerException("futures");
}
this.group = group;
Map<Channel, ChannelFuture> futureMap = new LinkedHashMap<Channel, ChannelFuture>();
for (ChannelFuture f: futures) {
futureMap.put(f.channel(), f);
}
this.futures = Collections.unmodifiableMap(futureMap);
for (ChannelFuture f: this.futures.values()) {
f.addListener(childListener);
}
// Done on arrival?
if (this.futures.isEmpty()) {
setSuccess0();
}
}
DefaultChannelGroupFuture(ChannelGroup group, Map<Channel, ChannelFuture> futures, EventExecutor executor) {
super(executor);
this.group = group;
this.futures = Collections.unmodifiableMap(futures);
for (ChannelFuture f: this.futures.values()) {
f.addListener(childListener);
}
// Done on arrival?
if (this.futures.isEmpty()) {
setSuccess0();
}
}
@Override
public ChannelGroup group() {
return group;
}
@Override
public ChannelFuture find(Channel channel) {
return futures.get(channel);
}
@Override
public Iterator<ChannelFuture> iterator() {
return futures.values().iterator();
}
@Override
public synchronized boolean isPartialSuccess() {
return successCount != 0 && successCount != futures.size();
}
@Override
public synchronized boolean isPartialFailure() {
return failureCount != 0 && failureCount != futures.size();
}
@Override
public DefaultChannelGroupFuture addListener(GenericFutureListener<? extends Future<? super Void>> listener) {
super.addListener(listener);
return this;
}
@Override
public DefaultChannelGroupFuture addListeners(GenericFutureListener<? extends Future<? super Void>>... listeners) {
super.addListeners(listeners);
return this;
}
@Override
public DefaultChannelGroupFuture removeListener(GenericFutureListener<? extends Future<? super Void>> listener) {
super.removeListener(listener);
return this;
}
@Override
public DefaultChannelGroupFuture removeListeners(
GenericFutureListener<? extends Future<? super Void>>... listeners) {
super.removeListeners(listeners);
return this;
}
@Override
public DefaultChannelGroupFuture await() throws InterruptedException {
super.await();
return this;
}
@Override
public DefaultChannelGroupFuture awaitUninterruptibly() {
super.awaitUninterruptibly();
return this;
}
@Override
public DefaultChannelGroupFuture syncUninterruptibly() {
super.syncUninterruptibly();
return this;
}
@Override
public DefaultChannelGroupFuture sync() throws InterruptedException {
super.sync();
return this;
}
@Override
public ChannelGroupException cause() {
return (ChannelGroupException) super.cause();
}
private void setSuccess0() {
super.setSuccess(null);
}
private void setFailure0(ChannelGroupException cause) {
super.setFailure(cause);
}
@Override
public DefaultChannelGroupFuture setSuccess(Void result) {
throw new IllegalStateException();
}
@Override
public boolean trySuccess(Void result) {
throw new IllegalStateException();
}
@Override
public DefaultChannelGroupFuture setFailure(Throwable cause) {
throw new IllegalStateException();
}
@Override
public boolean tryFailure(Throwable cause) {
throw new IllegalStateException();
}
@Override
protected void checkDeadLock() {
EventExecutor e = executor();
if (e != null && e != ImmediateEventExecutor.INSTANCE && e.inEventLoop()) {
throw new BlockingOperationException();
}
}
private static final class DefaultEntry<K, V> implements Map.Entry<K, V> {
private final K key;
private final V value;
DefaultEntry(K key, V value) {
this.key = key;
this.value = value;
}
@Override
public K getKey() {
return key;
}
@Override
public V getValue() {
return value;
}
@Override
public V setValue(V value) {
throw new UnsupportedOperationException("read-only");
}
}
}