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/*
* Copyright 2013 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.buffer.BufUtil;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.FileRegion;
import io.netty.channel.ServerChannel;
import io.netty.util.concurrent.DefaultPromise;
import io.netty.util.concurrent.EventExecutor;
import io.netty.util.concurrent.EventExecutorGroup;
import io.netty.util.concurrent.FailedFuture;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.ImmediateEventExecutor;
import io.netty.util.concurrent.Promise;
import io.netty.util.concurrent.SucceededFuture;
import io.netty.util.internal.PlatformDependent;
import java.util.AbstractSet;
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;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicInteger;
/**
* The default {@link ChannelGroup} implementation.
*/
public class DefaultChannelGroup extends AbstractSet implements ChannelGroup {
private static final AtomicInteger nextId = new AtomicInteger();
private static final ImmediateEventExecutor DEFAULT_EXECUTOR = new ImmediateEventExecutor();
private final String name;
private final EventExecutor executor;
private final ConcurrentMap serverChannels = PlatformDependent.newConcurrentHashMap();
private final ConcurrentMap nonServerChannels = PlatformDependent.newConcurrentHashMap();
private final ChannelFutureListener remover = new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
remove(future.channel());
}
};
/**
* Creates a new group with a generated name.
*/
public DefaultChannelGroup() {
this("group-0x" + Integer.toHexString(nextId.incrementAndGet()));
}
/**
* Creates a new group with a generated name amd the provided {@link EventExecutor} to notify the
* {@link ChannelGroupFuture}s.
*/
public DefaultChannelGroup(EventExecutor executor) {
this("group-0x" + Integer.toHexString(nextId.incrementAndGet()), executor);
}
/**
* Creates a new group with the specified {@code name}. Please note that
* different groups can have the same name, which means no duplicate check
* is done against group names.
*/
public DefaultChannelGroup(String name) {
this(name, DEFAULT_EXECUTOR);
}
/**
* Creates a new group with the specified {@code name} and {@link EventExecutor} to notify the
* {@link ChannelGroupFuture}s. Please note that different groups can have the same name, which means no
* duplicate check is done against group names.
*/
public DefaultChannelGroup(String name, EventExecutor executor) {
if (name == null) {
throw new NullPointerException("name");
}
this.name = name;
this.executor = executor;
}
@Override
public String name() {
return name;
}
@Override
public boolean isEmpty() {
return nonServerChannels.isEmpty() && serverChannels.isEmpty();
}
@Override
public int size() {
return nonServerChannels.size() + serverChannels.size();
}
@Override
public Channel find(Integer id) {
Channel c = nonServerChannels.get(id);
if (c != null) {
return c;
} else {
return serverChannels.get(id);
}
}
@Override
public boolean contains(Object o) {
if (o instanceof Integer) {
return nonServerChannels.containsKey(o) || serverChannels.containsKey(o);
} else if (o instanceof Channel) {
Channel c = (Channel) o;
if (o instanceof ServerChannel) {
return serverChannels.containsKey(c.id());
} else {
return nonServerChannels.containsKey(c.id());
}
} else {
return false;
}
}
@Override
public boolean add(Channel channel) {
ConcurrentMap map =
channel instanceof ServerChannel? serverChannels : nonServerChannels;
boolean added = map.putIfAbsent(channel.id(), channel) == null;
if (added) {
channel.closeFuture().addListener(remover);
}
return added;
}
@Override
public boolean remove(Object o) {
Channel c = null;
if (o instanceof Integer) {
c = nonServerChannels.remove(o);
if (c == null) {
c = serverChannels.remove(o);
}
} else if (o instanceof Channel) {
c = (Channel) o;
if (c instanceof ServerChannel) {
c = serverChannels.remove(c.id());
} else {
c = nonServerChannels.remove(c.id());
}
}
if (c == null) {
return false;
}
c.closeFuture().removeListener(remover);
return true;
}
@Override
public void clear() {
nonServerChannels.clear();
serverChannels.clear();
}
@Override
public Iterator iterator() {
return new CombinedIterator(
serverChannels.values().iterator(),
nonServerChannels.values().iterator());
}
@Override
public Object[] toArray() {
Collection channels = new ArrayList(size());
channels.addAll(serverChannels.values());
channels.addAll(nonServerChannels.values());
return channels.toArray();
}
@Override
public T[] toArray(T[] a) {
Collection channels = new ArrayList(size());
channels.addAll(serverChannels.values());
channels.addAll(nonServerChannels.values());
return channels.toArray(a);
}
@Override
public ChannelGroupFuture close() {
Map futures =
new LinkedHashMap(size());
for (Channel c: serverChannels.values()) {
futures.put(c.id(), c.close().awaitUninterruptibly());
}
for (Channel c: nonServerChannels.values()) {
futures.put(c.id(), c.close());
}
return new DefaultChannelGroupFuture(this, futures, executor);
}
@Override
public ChannelGroupFuture disconnect() {
Map futures =
new LinkedHashMap(size());
for (Channel c: serverChannels.values()) {
futures.put(c.id(), c.disconnect());
}
for (Channel c: nonServerChannels.values()) {
futures.put(c.id(), c.disconnect());
}
return new DefaultChannelGroupFuture(this, futures, executor);
}
@Override
public ChannelGroupFuture write(Object message) {
if (message == null) {
throw new NullPointerException("message");
}
Map futures = new LinkedHashMap(size());
for (Channel c: nonServerChannels.values()) {
BufUtil.retain(message);
futures.put(c.id(), c.write(message));
}
BufUtil.release(message);
return new DefaultChannelGroupFuture(this, futures, executor);
}
@Override
public ChannelGroupFuture sendFile(FileRegion region) {
if (region == null) {
throw new NullPointerException("region");
}
Map futures = new LinkedHashMap(size());
for (Channel c: nonServerChannels.values()) {
BufUtil.retain(region);
futures.put(c.id(), c.sendFile(region));
}
BufUtil.release(region);
return new DefaultChannelGroupFuture(this, futures, executor);
}
@Override
public ChannelGroupFuture flush() {
Map futures = new LinkedHashMap(size());
for (Channel c: nonServerChannels.values()) {
futures.put(c.id(), c.flush());
}
return new DefaultChannelGroupFuture(this, futures, executor);
}
@Override
public ChannelGroupFuture deregister() {
Map futures =
new LinkedHashMap(size());
for (Channel c: serverChannels.values()) {
futures.put(c.id(), c.deregister());
}
for (Channel c: nonServerChannels.values()) {
futures.put(c.id(), c.deregister());
}
return new DefaultChannelGroupFuture(this, futures, executor);
}
@Override
public int hashCode() {
return System.identityHashCode(this);
}
@Override
public boolean equals(Object o) {
return this == o;
}
@Override
public int compareTo(ChannelGroup o) {
int v = name().compareTo(o.name());
if (v != 0) {
return v;
}
return System.identityHashCode(this) - System.identityHashCode(o);
}
@Override
public String toString() {
return getClass().getSimpleName() +
"(name: " + name() + ", size: " + size() + ')';
}
private static final class ImmediateEventExecutor implements EventExecutor {
private final Future successedFuture = new SucceededFuture(this);
@Override
public EventExecutor next() {
return this;
}
@Override
public EventExecutorGroup parent() {
return null;
}
@Override
public boolean inEventLoop() {
return true;
}
@Override
public boolean inEventLoop(Thread thread) {
return true;
}
@Override
public void shutdown() {
}
@Override
public boolean isShutdown() {
return false;
}
@Override
public boolean isTerminated() {
return false;
}
@Override
public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException {
return false;
}
@Override
public Promise newPromise() {
return new DefaultPromise(this);
}
@Override
public Future newSucceededFuture() {
return successedFuture;
}
@Override
public Future newFailedFuture(Throwable cause) {
return new FailedFuture(this, cause);
}
@Override
public ScheduledFuture schedule(Runnable command, long delay, TimeUnit unit) {
throw new UnsupportedOperationException();
}
@Override
public ScheduledFuture schedule(Callable callable, long delay, TimeUnit unit) {
throw new UnsupportedOperationException();
}
@Override
public ScheduledFuture scheduleAtFixedRate(Runnable command, long initialDelay,
long period, TimeUnit unit) {
throw new UnsupportedOperationException();
}
@Override
public ScheduledFuture scheduleWithFixedDelay(Runnable command, long initialDelay,
long delay, TimeUnit unit) {
throw new UnsupportedOperationException();
}
@Override
public List shutdownNow() {
return Collections.emptyList();
}
@Override
public java.util.concurrent.Future submit(Callable task) {
if (task == null) {
throw new NullPointerException("task");
}
FutureTask future = new FutureTask(task);
future.run();
return future;
}
@Override
public java.util.concurrent.Future submit(Runnable task, T result) {
if (task == null) {
throw new NullPointerException("task");
}
FutureTask future = new FutureTask(task, result);
future.run();
return future;
}
@SuppressWarnings("unchecked")
@Override
public java.util.concurrent.Future submit(Runnable task) {
if (task == null) {
throw new NullPointerException("task");
}
FutureTask future = new FutureTask(task, null);
future.run();
return future;
}
@Override
public List> invokeAll(Collection> tasks) {
if (tasks == null) {
throw new NullPointerException("tasks");
}
List> futures = new ArrayList>();
for (Callable task: tasks) {
futures.add(submit(task));
}
return futures;
}
@Override
public List> invokeAll(Collection> tasks,
long timeout, TimeUnit unit) {
if (tasks == null) {
throw new NullPointerException("tasks");
}
List> futures = new ArrayList>();
for (Callable task: tasks) {
futures.add(submit(task));
}
return futures;
}
@Override
public T invokeAny(Collection> tasks)
throws InterruptedException, ExecutionException {
if (tasks == null) {
throw new NullPointerException("tasks");
}
if (tasks.isEmpty()) {
throw new IllegalArgumentException("tasks must be non empty");
}
return invokeAll(tasks).get(0).get();
}
@Override
public T invokeAny(Collection> tasks, long timeout, TimeUnit unit)
throws InterruptedException, ExecutionException {
if (tasks == null) {
throw new NullPointerException("tasks");
}
if (tasks.isEmpty()) {
throw new IllegalArgumentException("tasks must be non empty");
}
return invokeAll(tasks).get(0).get();
}
@Override
public void execute(Runnable command) {
if (command == null) {
throw new NullPointerException("command");
}
command.run();
}
}
}
