/*
* 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.p2p.support;
import java.util.ArrayList;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
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.Client;
import com.alibaba.dubbo.remoting.RemotingException;
import com.alibaba.dubbo.remoting.Server;
import com.alibaba.dubbo.remoting.Transporters;
import com.alibaba.dubbo.remoting.p2p.Group;
import com.alibaba.dubbo.remoting.p2p.Peer;
import com.alibaba.dubbo.remoting.transport.ChannelHandlerDispatcher;
/**
* AbstractGroup
*
* @author william.liangf
*/
public abstract class AbstractGroup implements Group {
// 日志输出
protected static final Logger logger = LoggerFactory.getLogger(AbstractGroup.class);
protected final URL url;
protected final Map<URL, Server> servers = new ConcurrentHashMap<URL, Server>();
protected final Map<URL, Client> clients = new ConcurrentHashMap<URL, Client>();
protected final ChannelHandlerDispatcher dispatcher = new ChannelHandlerDispatcher();
public AbstractGroup(URL url){
if (url == null) {
throw new IllegalArgumentException("url == null");
}
this.url = url;
}
public URL getUrl() {
return url;
}
public void close() {
for (URL url : new ArrayList<URL>(servers.keySet())) {
try {
leave(url);
} catch (Throwable t) {
logger.error(t.getMessage(), t);
}
}
for (URL url : new ArrayList<URL>(clients.keySet())) {
try {
disconnect(url);
} catch (Throwable t) {
logger.error(t.getMessage(), t);
}
}
}
public Peer join(URL url, ChannelHandler handler) throws RemotingException {
Server server = servers.get(url);
if (server == null) { // TODO 有并发间隙
server = Transporters.bind(url, handler);
servers.put(url, server);
dispatcher.addChannelHandler(handler);
}
return new ServerPeer(server, clients, this);
}
public void leave(URL url) throws RemotingException {
Server server = servers.remove(url);
if (server != null) {
server.close();
}
}
protected Client connect(URL url) throws RemotingException {
if (servers.containsKey(url)) {
return null;
}
Client client = clients.get(url);
if (client == null) { // TODO 有并发间隙
client = Transporters.connect(url, dispatcher);
clients.put(url, client);
}
return client;
}
protected void disconnect(URL url) throws RemotingException {
Client client = clients.remove(url);
if (client != null) {
client.close();
}
}
}