Package org.apache.flink.streaming.api.operators

Interface OnWatermarkCallback<KEY>

@Internal public interface OnWatermarkCallback<KEY>
A callback registered with the InternalWatermarkCallbackService service. This callback will be invoked for all keys registered with the service, upon reception of a watermark.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    onWatermark(KEY key, org.apache.flink.streaming.api.watermark.Watermark watermark)
    The action to be triggered upon reception of a watermark.

  • Method Details

    • onWatermark

      void onWatermark(KEY key, org.apache.flink.streaming.api.watermark.Watermark watermark) throws IOException
      The action to be triggered upon reception of a watermark.
      Parameters:
      key - The current key.
      watermark - The current watermark.
      Throws:
      IOException