/*
* 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 com.facebook.presto.jdbc.internal.netty.channel.group;
import java.net.SocketAddress;
import java.util.AbstractSet;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.atomic.AtomicInteger;
import com.facebook.presto.jdbc.internal.netty.buffer.ChannelBuffer;
import com.facebook.presto.jdbc.internal.netty.channel.Channel;
import com.facebook.presto.jdbc.internal.netty.channel.ChannelFuture;
import com.facebook.presto.jdbc.internal.netty.channel.ChannelFutureListener;
import com.facebook.presto.jdbc.internal.netty.channel.ServerChannel;
import com.facebook.presto.jdbc.internal.netty.util.internal.ConcurrentHashMap;
/**
* The default {@link ChannelGroup} implementation.
* @apiviz.landmark
*/
public class DefaultChannelGroup extends AbstractSet<Channel> implements ChannelGroup {
private static final AtomicInteger nextId = new AtomicInteger();
private final String name;
private final ConcurrentMap<Integer, Channel> serverChannels = new ConcurrentHashMap<Integer, Channel>();
private final ConcurrentMap<Integer, Channel> nonServerChannels = new ConcurrentHashMap<Integer, Channel>();
private final ChannelFutureListener remover = new ChannelFutureListener() {
public void operationComplete(ChannelFuture future) throws Exception {
remove(future.getChannel());
}
};
/**
* Creates a new group with a generated name.
*/
public DefaultChannelGroup() {
this("group-0x" + Integer.toHexString(nextId.incrementAndGet()));
}
/**
* 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) {
if (name == null) {
throw new NullPointerException("name");
}
this.name = name;
}
public String getName() {
return name;
}
@Override
public boolean isEmpty() {
return nonServerChannels.isEmpty() && serverChannels.isEmpty();
}
@Override
public int size() {
return nonServerChannels.size() + serverChannels.size();
}
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.getId());
} else {
return nonServerChannels.containsKey(c.getId());
}
} else {
return false;
}
}
@Override
public boolean add(Channel channel) {
ConcurrentMap<Integer, Channel> map =
channel instanceof ServerChannel? serverChannels : nonServerChannels;
boolean added = map.putIfAbsent(channel.getId(), channel) == null;
if (added) {
channel.getCloseFuture().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.getId());
} else {
c = nonServerChannels.remove(c.getId());
}
}
if (c == null) {
return false;
}
c.getCloseFuture().removeListener(remover);
return true;
}
@Override
public void clear() {
nonServerChannels.clear();
serverChannels.clear();
}
@Override
public Iterator<Channel> iterator() {
return new CombinedIterator<Channel>(
serverChannels.values().iterator(),
nonServerChannels.values().iterator());
}
@Override
public Object[] toArray() {
Collection<Channel> channels = new ArrayList<Channel>(size());
channels.addAll(serverChannels.values());
channels.addAll(nonServerChannels.values());
return channels.toArray();
}
@Override
public <T> T[] toArray(T[] a) {
Collection<Channel> channels = new ArrayList<Channel>(size());
channels.addAll(serverChannels.values());
channels.addAll(nonServerChannels.values());
return channels.toArray(a);
}
public ChannelGroupFuture close() {
Map<Integer, ChannelFuture> futures =
new LinkedHashMap<Integer, ChannelFuture>(size());
for (Channel c: serverChannels.values()) {
futures.put(c.getId(), c.close().awaitUninterruptibly());
}
for (Channel c: nonServerChannels.values()) {
futures.put(c.getId(), c.close());
}
return new DefaultChannelGroupFuture(this, futures);
}
public ChannelGroupFuture disconnect() {
Map<Integer, ChannelFuture> futures =
new LinkedHashMap<Integer, ChannelFuture>(size());
for (Channel c: serverChannels.values()) {
futures.put(c.getId(), c.disconnect().awaitUninterruptibly());
}
for (Channel c: nonServerChannels.values()) {
futures.put(c.getId(), c.disconnect());
}
return new DefaultChannelGroupFuture(this, futures);
}
public ChannelGroupFuture setInterestOps(int interestOps) {
Map<Integer, ChannelFuture> futures =
new LinkedHashMap<Integer, ChannelFuture>(size());
for (Channel c: serverChannels.values()) {
futures.put(c.getId(), c.setInterestOps(interestOps).awaitUninterruptibly());
}
for (Channel c: nonServerChannels.values()) {
futures.put(c.getId(), c.setInterestOps(interestOps));
}
return new DefaultChannelGroupFuture(this, futures);
}
public ChannelGroupFuture setReadable(boolean readable) {
Map<Integer, ChannelFuture> futures =
new LinkedHashMap<Integer, ChannelFuture>(size());
for (Channel c: serverChannels.values()) {
futures.put(c.getId(), c.setReadable(readable).awaitUninterruptibly());
}
for (Channel c: nonServerChannels.values()) {
futures.put(c.getId(), c.setReadable(readable));
}
return new DefaultChannelGroupFuture(this, futures);
}
public ChannelGroupFuture unbind() {
Map<Integer, ChannelFuture> futures =
new LinkedHashMap<Integer, ChannelFuture>(size());
for (Channel c: serverChannels.values()) {
futures.put(c.getId(), c.unbind().awaitUninterruptibly());
}
for (Channel c: nonServerChannels.values()) {
futures.put(c.getId(), c.unbind());
}
return new DefaultChannelGroupFuture(this, futures);
}
public ChannelGroupFuture write(Object message) {
Map<Integer, ChannelFuture> futures =
new LinkedHashMap<Integer, ChannelFuture>(size());
if (message instanceof ChannelBuffer) {
ChannelBuffer buf = (ChannelBuffer) message;
for (Channel c: nonServerChannels.values()) {
futures.put(c.getId(), c.write(buf.duplicate()));
}
} else {
for (Channel c: nonServerChannels.values()) {
futures.put(c.getId(), c.write(message));
}
}
return new DefaultChannelGroupFuture(this, futures);
}
public ChannelGroupFuture write(Object message, SocketAddress remoteAddress) {
Map<Integer, ChannelFuture> futures =
new LinkedHashMap<Integer, ChannelFuture>(size());
if (message instanceof ChannelBuffer) {
ChannelBuffer buf = (ChannelBuffer) message;
for (Channel c: nonServerChannels.values()) {
futures.put(c.getId(), c.write(buf.duplicate(), remoteAddress));
}
} else {
for (Channel c: nonServerChannels.values()) {
futures.put(c.getId(), c.write(message, remoteAddress));
}
}
return new DefaultChannelGroupFuture(this, futures);
}
@Override
public int hashCode() {
return System.identityHashCode(this);
}
@Override
public boolean equals(Object o) {
return this == o;
}
public int compareTo(ChannelGroup o) {
int v = getName().compareTo(o.getName());
if (v != 0) {
return v;
}
return System.identityHashCode(this) - System.identityHashCode(o);
}
@Override
public String toString() {
return getClass().getSimpleName() +
"(name: " + getName() + ", size: " + size() + ')';
}
}