Storm DRPC示例

Local 模式：

public static void main(String[] args) {

     TopologyBuilder builder = new TopologyBuilder();

     LocalDRPC drpc = new LocalDRPC();

     DRPCSpout spout = new DRPCSpout("exclamation", drpc);

     builder.setSpout("drpc", spout);

     builder.setBolt("exclaim", new ExclamatioinBolt(), 3).shuffleGrouping("drpc");

     builder.setBolt("return", new ReturnResults(), 3).shffleGrouping("exclaim");

     LocalCluster cluster = new LocalCluster();

     Config conf = new Config();

     cluster.submitTopology("exclaim", conf, builder.createTopology());

     System.out.println(drpc.execute("exclamation","aaa")); //传进aaa

     System.out.println(drpc.execute("exclamation","bbb")); //传进bbb

}

集群模式：

1.修改storm.yaml中的drpc.servers配置

2.启动DRPC server

./bin/storm drpc >> ./logs/drpc.out 2>&1 &

tail -f ./logs/drpc.out

public static void main(String[] args) {

     DRPCClient client = new DRPCClient("master", 3772);

     try {

          String result = client.execute("exclamatiion", "abcd");

          System.out.println(result);

     } catch (Exception e) {

           e.printStackTrace();

     }

}