Package org.apache.storm.trident.operation

Interface Filter

All Superinterfaces:
EachOperation, Operation, Serializable
All Known Implementing Classes:
BaseFilter, Debug, Equals, FilterNull, Negate, TrueFilter, TrueFilter
public interface Filter extends EachOperation
Filters take in a tuple as input and decide whether or not to keep that tuple or not.

If the `isKeep()` method of a Filter returns `false` for a tuple, that tuple will be filtered out of the Stream

### Configuration If your `Filter` implementation has configuration requirements, you will typically want to extend BaseFilter and override the Operation.prepare(Map, TridentOperationContext) method to perform your custom initialization.

See Also:

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    isKeep(TridentTuple tuple)
    Determines if a tuple should be filtered out of a stream.

    Methods inherited from interface org.apache.storm.trident.operation.Operation

    cleanup, prepare

  • Method Details

    • isKeep

      boolean isKeep(TridentTuple tuple)
      Determines if a tuple should be filtered out of a stream.
      Parameters:
      tuple - the tuple being evaluated
      Returns:
      `false` to drop the tuple, `true` to keep the tuple