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. After August 12, 2020, you can use unsupported SDKs temporarily while you upgrade your pipelines. For more information, see Using an unsupported SDK.

For information on migrating from the 1.x SDK, see Migrating from Dataflow SDK 1.x for Java.

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.