Google Cloud Dataflow SDK for Java, version 1.9.1
com.google.cloud.dataflow.sdk.transforms.windowing
Class Never
- java.lang.Object
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- com.google.cloud.dataflow.sdk.transforms.windowing.Never
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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 theallowed lateness
.
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Constructor Summary
Constructors Constructor and Description Never()
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method and Description static Trigger.OnceTrigger
ever()
Returns a trigger which never fires.
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Method Detail
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ever
public static Trigger.OnceTrigger ever()
Returns a trigger which never fires. Output will be produced from the usingGroupByKey
when theBoundedWindow
closes.
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