Storm Trident示例global

如下代码使用global做repartition, 数据流中的所有tuple都被分配到同一个partition当中(partition id最小的那个)，

省略部分代码，省略部分可参考：https://blog.csdn.net/nickta/article/details/79666918

FixedBatchSpout spout = new FixedBatchSpout(new Fields("user", "score"), 3,   
                new Values("nickt1", 4),  
                new Values("nickt2", 7),   
                new Values("nickt1", 8),  
                new Values("nickt4", 9),   
                new Values("nickt5", 7),  
                new Values("nickt1", 11),  
                new Values("nickt4", 5)  
                );  
        spout.setCycle(false);  
        TridentTopology topology = new TridentTopology();  
        topology.newStream("spout1", spout)  
                .global()  
                .each(new Fields("user"),new Debug("print:"))  
                .parallelismHint(5);  

　　

输出：

<Fri Mar 23 15:41:17 CST 2018[partition0-Thread-62-b-0-executor[33 33]]> DEBUG(print:): [nickt1]
<Fri Mar 23 15:41:17 CST 2018[partition0-Thread-62-b-0-executor[33 33]]> DEBUG(print:): [nickt2]
<Fri Mar 23 15:41:17 CST 2018[partition0-Thread-62-b-0-executor[33 33]]> DEBUG(print:): [nickt1]
<Fri Mar 23 15:41:17 CST 2018[partition0-Thread-62-b-0-executor[33 33]]> DEBUG(print:): [nickt4]
<Fri Mar 23 15:41:17 CST 2018[partition0-Thread-62-b-0-executor[33 33]]> DEBUG(print:): [nickt5]
<Fri Mar 23 15:41:17 CST 2018[partition0-Thread-62-b-0-executor[33 33]]> DEBUG(print:): [nickt1]
<Fri Mar 23 15:41:17 CST 2018[partition0-Thread-62-b-0-executor[33 33]]> DEBUG(print:): [nickt4]