Package org.pentaho.di.trans.streaming.api

Interface StreamWindow<I,O>

All Known Implementing Classes:
FixedTimeStreamWindow
public interface StreamWindow<I,O>
A StreamWindow governs buffering and sending rows to a sub-transformation. Windowing strategies could include sending buffered rows * after a given interval * on a sliding interval * after a fixed number of rows have been read. *

  • Method Summary

    Modifier and Type
    Method
    Description
    Iterable<O>
    buffer(io.reactivex.Flowable<I> flowable)
    Takes an iterable (would typically be a StreamSource.flowable()} call) and buffers it according to the window strategy.

  • Method Details

    • buffer

      Iterable<O> buffer(io.reactivex.Flowable<I> flowable)
      Takes an iterable (would typically be a StreamSource.flowable()} call) and buffers it according to the window strategy. Returns an iterable of data for the window. Depending on stream implementation, the output could also be transformed. For example, the FixedTimeStreamWindow will pass windowed data to a subtransformation, and return the transformed results.