org.apache.storm.trident.operation

## Interface CombinerAggregator<T>

- All Superinterfaces:
    Serializable
  All Known Implementing Classes:
    Count, Sum, TridentReach.One

      public interface CombinerAggregator<T>
      extends Serializable

- - ### Method Summary

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

- - ### Method Detail

    - #### init

          T init(TridentTuple tuple)

    - #### combine

          T combine(T val1,
                    T val2)

    - #### zero

          T zero()

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