AfterProcessingTime (Google Cloud Dataflow SDK 1.9.1 API)

Google Cloud Dataflow SDK for Java, version 1.9.1

Warning: Cloud Dataflow SDK 1.x for Java is unsupported as of October 16, 2018. See Migrating from Cloud Dataflow SDK 1.x for Java for migration guidance.

Note: If you are using Cloud Dataflow SDK version 2.x, see the Apache Beam API reference documentation.

com.google.cloud.dataflow.sdk.transforms.windowing

Class AfterProcessingTime<W extends BoundedWindow>

• java.lang.Object
• • com.google.cloud.dataflow.sdk.transforms.windowing.Trigger<W>
  • • com.google.cloud.dataflow.sdk.transforms.windowing.Trigger.OnceTrigger<W>
    • • com.google.cloud.dataflow.sdk.transforms.windowing.AfterDelayFromFirstElement<W>
      • • com.google.cloud.dataflow.sdk.transforms.windowing.AfterProcessingTime<W>

• Type Parameters:

  W - BoundedWindow subclass used to represent the windows used

  All Implemented Interfaces:

  TriggerBuilder<W>, Serializable

  ---

  
  

  @Experimental(value=TRIGGER)
  public class AfterProcessingTime<W extends BoundedWindow>
  extends AfterDelayFromFirstElement<W>

  AfterProcessingTime triggers fire based on the current processing time. They operate in the real-time domain.

  The time at which to fire the timer can be adjusted via the methods in TimeTrigger, such as TimeTrigger#plusDelayOf or TimeTrigger#alignedTo.

  See Also:

  Serialized Form

• • Nested Class Summary

    • Nested classes/interfaces inherited from class com.google.cloud.dataflow.sdk.transforms.windowing.Trigger

      Trigger.MergingTriggerInfo<W extends BoundedWindow>, Trigger.OnceTrigger<W extends BoundedWindow>, Trigger.OnElementContext, Trigger.OnMergeContext, Trigger.TriggerContext, Trigger.TriggerInfo<W extends BoundedWindow>

  • Field Summary

    • Fields inherited from class com.google.cloud.dataflow.sdk.transforms.windowing.AfterDelayFromFirstElement

      DELAYED_UNTIL_TAG, IDENTITY, timestampMappers

    • Fields inherited from class com.google.cloud.dataflow.sdk.transforms.windowing.Trigger

      subTriggers

  • Method Summary

    All Methods Static Methods Instance Methods Concrete Methods 

    Modifier and Type	Method and Description
    boolean	equals(Object obj)
    protected Trigger<W>	getContinuationTrigger(List<Trigger<W>> continuationTriggers) Return the Trigger.getContinuationTrigger() of this Trigger.
    Instant	getCurrentTime(Trigger.TriggerContext context) To complete an implementation, return the desired time from the TriggerContext.
    Instant	getWatermarkThatGuaranteesFiring(W window) Returns a bound in watermark time by which this trigger would have fired at least once for a given window had there been input data.
    int	hashCode()
    protected AfterProcessingTime<W>	newWith(List<SerializableFunction<Instant,Instant>> transforms) To complete an implementation, return a new instance like this one, but incorporating the provided timestamp mapping functions.
    static <W extends BoundedWindow> AfterProcessingTime<W>	pastFirstElementInPane() Creates a trigger that fires when the current processing time passes the processing time at which this trigger saw the first element in a pane.
    String	toString()

    • Methods inherited from class com.google.cloud.dataflow.sdk.transforms.windowing.AfterDelayFromFirstElement

      alignedTo, alignedTo, clear, computeTargetTimestamp, isCompatible, mappedTo, onElement, onMerge, onOnlyFiring, plusDelayOf, prefetchOnElement, prefetchOnMerge, prefetchShouldFire, shouldFire

    • Methods inherited from class com.google.cloud.dataflow.sdk.transforms.windowing.Trigger.OnceTrigger

      getContinuationTrigger, onFire

    • Methods inherited from class com.google.cloud.dataflow.sdk.transforms.windowing.Trigger

      buildTrigger, orFinally, prefetchOnFire, subTriggers

    • Methods inherited from class java.lang.Object

      clone, finalize, getClass, notify, notifyAll, wait, wait, wait

• • Method Detail

    • getCurrentTime

      @Nullable
      public Instant getCurrentTime(Trigger.TriggerContext context)

      Description copied from class: AfterDelayFromFirstElement
      To complete an implementation, return the desired time from the TriggerContext.

      Specified by:

      getCurrentTime in class AfterDelayFromFirstElement<W extends BoundedWindow>

    • pastFirstElementInPane

      public static <W extends BoundedWindow> AfterProcessingTime<W> pastFirstElementInPane()

      Creates a trigger that fires when the current processing time passes the processing time at which this trigger saw the first element in a pane.

    • newWith

      protected AfterProcessingTime<W> newWith(List<SerializableFunction<Instant,Instant>> transforms)

      Description copied from class: AfterDelayFromFirstElement
      To complete an implementation, return a new instance like this one, but incorporating the provided timestamp mapping functions. Generally should be used by calling the constructor of this class from the constructor of the subclass.

      Specified by:

      newWith in class AfterDelayFromFirstElement<W extends BoundedWindow>

    • getWatermarkThatGuaranteesFiring

      public Instant getWatermarkThatGuaranteesFiring(W window)

      Description copied from class: Trigger
      Returns a bound in watermark time by which this trigger would have fired at least once for a given window had there been input data. This is a static property of a trigger that does not depend on its state.

      For triggers that do not fire based on the watermark advancing, returns BoundedWindow.TIMESTAMP_MAX_VALUE.

      This estimate is used to determine that there are no elements in a side-input window, which causes the default value to be used instead.

      Overrides:

      getWatermarkThatGuaranteesFiring in class AfterDelayFromFirstElement<W extends BoundedWindow>

    • getContinuationTrigger

      protected Trigger<W> getContinuationTrigger(List<Trigger<W>> continuationTriggers)

      Description copied from class: Trigger
      Return the Trigger.getContinuationTrigger() of this Trigger. For convenience, this is provided the continuation trigger of each of the sub-triggers.

      Specified by:

      getContinuationTrigger in class Trigger<W extends BoundedWindow>

    • toString

      public String toString()

      Overrides:

      toString in class Trigger<W extends BoundedWindow>

    • equals

      public boolean equals(Object obj)

      Overrides:

      equals in class Trigger<W extends BoundedWindow>

    • hashCode

      public int hashCode()

      Overrides:

      hashCode in class Trigger<W extends BoundedWindow>