Package org.apache.storm.starter.streams

## Class StatefulWordCount

- java.lang.Object
- - org.apache.storm.starter.streams.StatefulWordCount

-     public class StatefulWordCount
      extends Object

  A stateful word count that uses `PairStream.updateStateByKey(StateUpdater)` to save the counts in a key value state. This example uses Redis state store.

  You should start a local redis instance before running the 'storm jar' command. By default the connection will be attempted at localhost:6379. The default RedisKeyValueStateProvider parameters can be overridden in conf/storm.yaml, for e.g.

       topology.state.provider.config: '{"keyClass":"...", "valueClass":"...",
        "keySerializerClass":"...", "valueSerializerClass":"...",
        "jedisPoolConfig":{"host":"localhost", "port":6379,
        "timeout":2000, "database":0, "password":"xyz"}}'

- - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `StatefulWordCount()` |

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `static void` | `main​(String[] args)` |

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### StatefulWordCount

          public StatefulWordCount()

  - ### Method Detail

    - #### main

          public static void main​(String[] args)
                           throws Exception

      Throws:
        `Exception`