/*
* Copyright 1999-2012 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.examples.heartbeat;
import java.util.concurrent.atomic.AtomicInteger;
import com.alibaba.dubbo.remoting.Channel;
import com.alibaba.dubbo.remoting.RemotingException;
import com.alibaba.dubbo.remoting.exchange.ExchangeHandler;
import com.alibaba.dubbo.remoting.exchange.Request;
import com.alibaba.dubbo.remoting.exchange.Response;
import com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler;
/**
* @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
*/
public class HeartBeatExchangeHandler extends HeaderExchangeHandler {
private AtomicInteger heartBeatCounter = new AtomicInteger( 0 );
public HeartBeatExchangeHandler( ExchangeHandler handler ) {
super( handler );
}
@Override
public void received( Channel channel, Object message ) throws RemotingException {
if ( message instanceof Request ) {
Request req = ( Request ) message;
if ( req.isHeartbeat() ) {
heartBeatCounter.incrementAndGet();
channel.setAttribute(KEY_READ_TIMESTAMP, System.currentTimeMillis());
Response res = new Response( req.getId(), req.getVersion() );
res.setEvent( req.getData() == null ? null : req.getData().toString() );
channel.send( res );
}
} else {
super.received( channel, message );
}
}
public int getHeartBeatCount() {
return heartBeatCounter.get();
}
}