/*
* Copyright 1999-2011 Alibaba Group.
*
* Licensed 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.alibaba.dubbo.remoting.transport.netty;
import java.net.InetSocketAddress;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.jboss.netty.channel.ChannelFuture;
import com.alibaba.dubbo.common.Constants;
import com.alibaba.dubbo.common.URL;
import com.alibaba.dubbo.common.logger.Logger;
import com.alibaba.dubbo.common.logger.LoggerFactory;
import com.alibaba.dubbo.remoting.ChannelHandler;
import com.alibaba.dubbo.remoting.RemotingException;
import com.alibaba.dubbo.remoting.transport.AbstractChannel;
/**
* NettyChannel.
*
* @author qian.lei
* @author william.liangf
*/
final class NettyChannel extends AbstractChannel {
private static final Logger logger = LoggerFactory.getLogger(NettyChannel.class);
private static final ConcurrentMap<org.jboss.netty.channel.Channel, NettyChannel> channelMap = new ConcurrentHashMap<org.jboss.netty.channel.Channel, NettyChannel>();
private final org.jboss.netty.channel.Channel channel;
private final Map<String, Object> attributes = new ConcurrentHashMap<String, Object>();
private NettyChannel(org.jboss.netty.channel.Channel channel, URL url, ChannelHandler handler){
super(url, handler);
if (channel == null) {
throw new IllegalArgumentException("netty channel == null;");
}
this.channel = channel;
}
static NettyChannel getOrAddChannel(org.jboss.netty.channel.Channel ch, URL url, ChannelHandler handler) {
if (ch == null) {
return null;
}
NettyChannel ret = channelMap.get(ch);
if (ret == null) {
NettyChannel nc = new NettyChannel(ch, url, handler);
if (ch.isConnected()) {
ret = channelMap.putIfAbsent(ch, nc);
}
if (ret == null) {
ret = nc;
}
}
return ret;
}
static void removeChannelIfDisconnected(org.jboss.netty.channel.Channel ch) {
if (ch != null && ! ch.isConnected()) {
channelMap.remove(ch);
}
}
public InetSocketAddress getLocalAddress() {
return (InetSocketAddress) channel.getLocalAddress();
}
public InetSocketAddress getRemoteAddress() {
return (InetSocketAddress) channel.getRemoteAddress();
}
public boolean isConnected() {
return channel.isConnected();
}
public void send(Object message, boolean sent) throws RemotingException {
super.send(message, sent);
boolean success = true;
int timeout = 0;
try {
ChannelFuture future = channel.write(message);
if (sent) {
timeout = getUrl().getPositiveParameter(Constants.TIMEOUT_KEY, Constants.DEFAULT_TIMEOUT);
success = future.await(timeout);
}
} catch (Throwable e) {
throw new RemotingException(this, "Failed to send message " + message + " to " + getRemoteAddress() + ", cause: " + e.getMessage(), e);
}
if(!success) {
throw new RemotingException(this, "Failed to send message " + message + " to " + getRemoteAddress()
+ "in timeout(" + timeout + "ms) limit");
}
}
public void close() {
try {
super.close();
} catch (Exception e) {
logger.warn(e.getMessage(), e);
}
try {
removeChannelIfDisconnected(channel);
} catch (Exception e) {
logger.warn(e.getMessage(), e);
}
try {
attributes.clear();
} catch (Exception e) {
logger.warn(e.getMessage(), e);
}
try {
if (logger.isInfoEnabled()) {
logger.info("Close netty channel " + channel);
}
channel.close();
} catch (Exception e) {
logger.warn(e.getMessage(), e);
}
}
public boolean hasAttribute(String key) {
return attributes.containsKey(key);
}
public Object getAttribute(String key) {
return attributes.get(key);
}
public void setAttribute(String key, Object value) {
if (value == null) { // The null value unallowed in the ConcurrentHashMap.
attributes.remove(key);
} else {
attributes.put(key, value);
}
}
public void removeAttribute(String key) {
attributes.remove(key);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((channel == null) ? 0 : channel.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (getClass() != obj.getClass()) return false;
NettyChannel other = (NettyChannel) obj;
if (channel == null) {
if (other.channel != null) return false;
} else if (!channel.equals(other.channel)) return false;
return true;
}
@Override
public String toString() {
return "NettyChannel [channel=" + channel + "]";
}
}