Apache Storm bolt 从不同的 spout/bolt 接收多个输入元组 [英] An Apache Storm bolt receive multiple input tuples from different spout/bolt

问题描述

一个 bolt 是否可以从不同的 spout/bolt 接收多个输入元组?例如，Bolt C 接收来自 Spout A 的输入元组和来自 Bolt B 的输入元组进行处理.我应该如何实施它?我的意思是为 Bolt C 及其拓扑编写 Java 代码.

Is it possible for a bolt receive multiple input tuples from different spout/bolt? For instance, Bolt C receive input tuples from Spout A and input tuples from Bolt B to be processed. How should I implement it? I mean writing the Java code for Bolt C and also its topology.

推荐答案

教程回答您的问题.

https://storm.apache.org/documentation/Tutorial.html

这是您目标的代码(来自教程的 C/P):

Here is the code for your goal(C/P from tutorial):

builder.setBolt("exclaim2", new ExclamationBolt(), 5)
            .shuffleGrouping("words")
            .shuffleGrouping("exclaim1");

exclaim2 将接受来自 words 和 exclaim1 的元组，两者都使用随机分组.

exclaim2 will accept tuples from both words and exclaim1, both using shuffle grouping.

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