norbert 高并发分布式服务例子 examples （二）

iteye编辑器在IE8下太不好用了，写了保存到草稿里结果再编辑格式就都没了，晕

接上面的 http://rabbit9898.iteye.com/blog/1508968 ，继续

5. 写服务器端代码

servernode1.java

package norbert.exam.server;
import norbert.exam.util.ServerUtil;
import com.linkedin.norbert.javacompat.cluster.ClusterClient;

public class ServerNode1 {
    public static void main(String[] args)
    {
    	//创建clusterClient
        ClusterClient cc = ServerUtil.configCluster(ServerUtil.clusterName, ServerUtil.zkConnectStr);
        //添加node1，端口绑定5001
        cc.removeNode(1);
        cc.addNode(1, "localhost:5001");
        //启动node1
        ServerUtil.startServer(ServerUtil.clusterName, 1, ServerUtil.zkConnectStr);
    }
}

其中在ServerUtil.startServer中有：

   public static void startServer(String serviceName, int nodeId, String zkConnectStr)
     {
         NetworkServerConfig config = new NetworkServerConfig();
         config.setServiceName(serviceName);
         ...

NetworkServer ns = new NettyNetworkServer(config);

//server中绑定需要处理的消息类型和功能

ns.registerHandler(new NodePingRequestHandler(), new PingSerializer());
ns.registerHandler(new NodeSumRequestHandler(), new ReqProtoSerializer());

ns.bind(nodeId);
}

NodeSumRequestHandler.java 代码，实现加和：

public class NodeSumRequestHandler implements RequestHandler<Request,Reponse>{

	@Override
	public Reponse handleRequest(Request request) throws Exception {
		Reponse r= new Reponse();
		if(request!=null){
			r.setSum(request.num + request.num);
		}
		System.out.println("receive request=" + request.num +" sum="+ r.getSum());
		return r;
	}
}

同样创建servernode2.java

6. 写客户端测试调用代码

ClientSum.java

public class ClientSum {
     public static void main(String[] args)
    {
        NetworkClientConfig config = new NetworkClientConfig();
        config.setServiceName(ServerUtil.clusterName);
        config.setZooKeeperConnectString(ServerUtil.zkConnectStr);
       //....
       
      //采用roundrobin策略 随机调用node上的功能
        NetworkClient nc = new NettyNetworkClient(config, new RoundRobinLoadBalancerFactory());

        int num =3;
        final Request request = new Request(num);
        Future<Reponse> responseFuture = nc.sendRequest(request, new ReqProtoSerializer());

        try
        {
            final Reponse sumResp = responseFuture.get();
            System.out.println("num=" + num +" ; got sum resp: " + sumResp.getSum());
        }
        catch( InterruptedException e )
        {...   }
}

7. 客户端测试Server调用

启动servernode1和servernode2,可以看到：

servernode1的控制台输出

connected to cluster: []
nodes changed,current node size= 0
nodes changed,current node size= 0
nodes changed,current node size= 0
nodes changed,current node size= 0
nodes changed,current node size= 1 node: JavaNode(1,localhost:5001,true,[]); 
nodes changed,current node size= 1 node: JavaNode(1,localhost:5001,true,[]); 
nodes changed,current node size= 1 node: JavaNode(1,localhost:5001,true,[]); 
nodes changed,current node size= 2 node: JavaNode(2,localhost:5002,true,[]);  node: JavaNode(1,localhost:5001,true,[]);

启动ClientSum.java 控制台输出:

num=3 ; got sum resp: 6

在servernode1 或者servernode2下可以看到多了一行输出：

receive request=3 sum=6

多启动几次ClientSum.java ，可以看到会分发到不同的node上。

转载请标明出处。上程序附件。

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norbert 高并发分布式服务例子 examples （二）

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