PeriodicSequence (core 2.44.0 API)

java.lang.Object
- org.apache.beam.sdk.transforms.PTransform<PCollection<PeriodicSequence.SequenceDefinition>,PCollection<org.joda.time.Instant>>
- - org.apache.beam.sdk.transforms.PeriodicSequence

All Implemented Interfaces:

java.io.Serializable, HasDisplayData
```
public class PeriodicSequence
extends PTransform<PCollection<PeriodicSequence.SequenceDefinition>,PCollection<org.joda.time.Instant>>
```
A PTransform which generates a sequence of timestamped elements at given runtime intervals.
Transform assigns each element some timestamp and will only output element when worker clock reach given timestamp. Transform will not output elements prior to target time. Transform can output elements at any time after target time.

See Also:

Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class PeriodicSequence.OutputRangeTracker

static class PeriodicSequence.SequenceDefinition

Field Summary
- Fields inherited from class org.apache.beam.sdk.transforms.PTransform
  name, resourceHints

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static PeriodicSequence`	`create()`
`PCollection<org.joda.time.Instant>`	`expand(PCollection<PeriodicSequence.SequenceDefinition> input)`	Override this method to specify how this `PTransform` should be expanded on the given `InputT`.

Methods inherited from class org.apache.beam.sdk.transforms.PTransform
compose, compose, getAdditionalInputs, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setResourceHints, toString, validate, validate

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Method Detail
  - create
```
public static PeriodicSequence create()
```
  - expand
```
public PCollection<org.joda.time.Instant> expand(PCollection<PeriodicSequence.SequenceDefinition> input)
```
    Description copied from class: PTransform
    
    Override this method to specify how this PTransform should be expanded on the given InputT.
    NOTE: This method should not be called directly. Instead apply the PTransform should be applied to the InputT using the apply method.
    Composite transforms, which are defined in terms of other transforms, should return the output of one of the composed transforms. Non-composite transforms, which do not apply any transforms internally, should return a new unbound output and register evaluators (via backend-specific registration methods).
    
    Specified by:
    
    expand in class PTransform<PCollection<PeriodicSequence.SequenceDefinition>,PCollection<org.joda.time.Instant>>