Never (Google Cloud Dataflow SDK 1.9.1 API)

Google Cloud Dataflow SDK for Java, version 1.9.1

Warning: Dataflow SDK 1.x for Java is unsupported as of October 16, 2018. See Migrating from 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 Never

• java.lang.Object
• • com.google.cloud.dataflow.sdk.transforms.windowing.Never

• ---

  
  

  public final class Never
  extends Object

  A trigger which never fires.

  Using this trigger will only produce output when the watermark passes the end of the window plus the allowed lateness.

• • Constructor Summary

    Constructors 

    Constructor and Description
    Never()

  • Method Summary

    All Methods Static Methods Concrete Methods 

    Modifier and Type	Method and Description
    static Trigger.OnceTrigger	ever() Returns a trigger which never fires.

    • Methods inherited from class java.lang.Object

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

• • Constructor Detail

    • Never

      public Never()

  • Method Detail

    • ever

      public static Trigger.OnceTrigger ever()

      Returns a trigger which never fires. Output will be produced from the using GroupByKey when the BoundedWindow closes.