| /* |
| * 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.remoting.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(); |
| } |
| |
| } |