Package org.apache.storm.trident.operation.builtin

## Class Count

- java.lang.Object
- - org.apache.storm.trident.operation.builtin.Count

- All Implemented Interfaces:
    `Serializable`, `CombinerAggregator<Long>`

      public class Count
      extends Object
      implements CombinerAggregator<Long>

  See Also:
    Serialized Form

- - ### Constructor Summary

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

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `Long` | `combine​(Long val1, Long val2)` |
    `Long` | `init​(TridentTuple tuple)` |
    `Long` | `zero()` |

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

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

- - ### Constructor Detail

    - #### Count

          public Count()

  - ### Method Detail

    - #### init

          public Long init​(TridentTuple tuple)

      Specified by:
        `init` in interface `CombinerAggregator<Long>`

    - #### combine

          public Long combine​(Long val1,
                              Long val2)

      Specified by:
        `combine` in interface `CombinerAggregator<Long>`

    - #### zero

          public Long zero()

      Specified by:
        `zero` in interface `CombinerAggregator<Long>`