/*
* 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 com.alibaba.dubbo.common.Constants;
import com.alibaba.dubbo.common.URL;
import com.alibaba.dubbo.common.utils.NetUtils;
import com.alibaba.dubbo.remoting.Transporters;
import com.alibaba.dubbo.remoting.exchange.ExchangeClient;
import com.alibaba.dubbo.remoting.exchange.ExchangeHandler;
import com.alibaba.dubbo.remoting.exchange.ExchangeServer;
import com.alibaba.dubbo.remoting.exchange.support.ExchangeHandlerAdapter;
import com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeClient;
import com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeServer;
/**
* @author <a href="mailto:gang.lvg@alibaba-inc.com">kimi</a>
*/
public class HeartbeatClient {
private static final URL serverUrl = URL.valueOf(
new StringBuilder( 32 )
.append( "netty://" )
.append( NetUtils.getLocalHost() )
.append( ":9999" ).toString() )
.addParameter( Constants.CODEC_KEY, "exchange" );
private static final ExchangeHandler handler = new ExchangeHandlerAdapter() {
};
private static ExchangeServer exchangeServer;
private static volatile boolean serverStarted = false;
public static void main( String[] args ) throws Exception {
final HeartBeatExchangeHandler serverHandler = new HeartBeatExchangeHandler( handler );
Thread serverThread = new Thread( new Runnable() {
public void run() {
try {
exchangeServer = new HeaderExchangeServer(
Transporters.bind( serverUrl, serverHandler ) );
serverStarted = true;
} catch ( Exception e ) {
e.printStackTrace();
}
}
} );
serverThread.setDaemon( true );
serverThread.start();
while ( ! serverStarted ) {
Thread.sleep( 1000 );
}
URL url = serverUrl.addParameter( Constants.HEARTBEAT_KEY, 1000 );
HeartBeatExchangeHandler clientHandler = new HeartBeatExchangeHandler( handler );
ExchangeClient exchangeClient = new HeaderExchangeClient(
Transporters.connect( url, clientHandler ) );
for( int i = 0; i < 10; i++ ) {
Thread.sleep( 1000 );
System.out.print( "." );
}
System.out.println();
if ( serverHandler.getHeartBeatCount() > 0 ) {
System.out.printf( "Server receives %d heartbeats",
serverHandler.getHeartBeatCount() );
} else {
throw new Exception( "Client heartbeat does not work." );
}
exchangeClient.close();
exchangeServer.close();
}
}