Package org.apache.flink.table.runtime.generated

Class WatermarkGenerator

java.lang.Object
org.apache.flink.api.common.functions.AbstractRichFunction
org.apache.flink.table.runtime.generated.WatermarkGenerator
All Implemented Interfaces:
Serializable, org.apache.flink.api.common.functions.Function, org.apache.flink.api.common.functions.RichFunction
Direct Known Subclasses:
BoundedOutOfOrderWatermarkGenerator
public abstract class WatermarkGenerator extends org.apache.flink.api.common.functions.AbstractRichFunction
The WatermarkGenerator is used to generate watermark based the input elements.
See Also:

  • Constructor Summary

    Constructors
    Constructor
    Description
    WatermarkGenerator()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    abstract Long
    currentWatermark(org.apache.flink.table.data.RowData row)
    Returns the watermark for the current row or null if no watermark should be generated.

    Methods inherited from class org.apache.flink.api.common.functions.AbstractRichFunction

    close, getIterationRuntimeContext, getRuntimeContext, open, setRuntimeContext

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • WatermarkGenerator

      public WatermarkGenerator()

  • Method Details

    • currentWatermark

      @Nullable public abstract Long currentWatermark(org.apache.flink.table.data.RowData row) throws Exception
      Returns the watermark for the current row or null if no watermark should be generated.
      Parameters:
      row - The current row.
      Returns:
      The watermark for this row or null if no watermark should be generated.
      Throws:
      Exception