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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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 org.apache.dubbo.remoting.p2p.exchange.support;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.logger.Logger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.remoting.ChannelHandler;
import org.apache.dubbo.remoting.Client;
import org.apache.dubbo.remoting.RemotingException;
import org.apache.dubbo.remoting.RemotingServer;
import org.apache.dubbo.remoting.exchange.ExchangeClient;
import org.apache.dubbo.remoting.exchange.ExchangeHandler;
import org.apache.dubbo.remoting.exchange.ExchangeServer;
import org.apache.dubbo.remoting.exchange.Exchangers;
import org.apache.dubbo.remoting.exchange.support.ExchangeHandlerDispatcher;
import org.apache.dubbo.remoting.p2p.Peer;
import org.apache.dubbo.remoting.p2p.exchange.ExchangeGroup;
import org.apache.dubbo.remoting.p2p.exchange.ExchangePeer;
import java.util.ArrayList;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
/**
* AbstractGroup
*/
public abstract class AbstractExchangeGroup implements ExchangeGroup {
// log output
protected static final Logger logger = LoggerFactory.getLogger(AbstractExchangeGroup.class);
protected final URL url;
protected final Map servers = new ConcurrentHashMap();
protected final Map clients = new ConcurrentHashMap();
protected final ExchangeHandlerDispatcher dispatcher = new ExchangeHandlerDispatcher();
public AbstractExchangeGroup(URL url) {
if (url == null) {
throw new IllegalArgumentException("url == null");
}
this.url = url;
}
@Override
public URL getUrl() {
return url;
}
@Override
public void close() {
for (URL url : new ArrayList(servers.keySet())) {
try {
leave(url);
} catch (Throwable t) {
logger.error(t.getMessage(), t);
}
}
for (URL url : new ArrayList(clients.keySet())) {
try {
disconnect(url);
} catch (Throwable t) {
logger.error(t.getMessage(), t);
}
}
}
@Override
public Peer join(URL url, ChannelHandler handler) throws RemotingException {
return join(url, (ExchangeHandler) handler);
}
@Override
public ExchangePeer join(URL url, ExchangeHandler handler) throws RemotingException {
ExchangeServer server = servers.get(url);
if (server == null) { // TODO exist concurrent gap
server = Exchangers.bind(url, handler);
servers.put(url, server);
dispatcher.addChannelHandler(handler);
}
return new ExchangeServerPeer(server, clients, this);
}
@Override
public void leave(URL url) throws RemotingException {
RemotingServer server = servers.remove(url);
if (server != null) {
server.close();
}
}
protected Client connect(URL url) throws RemotingException {
if (servers.containsKey(url)) {
return null;
}
ExchangeClient client = clients.get(url);
if (client == null) { // TODO exist concurrent gap
client = Exchangers.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();
}
}
}