org.apache.beam.sdk.extensions.sql.meta.provider.pubsub

Class RowToPubsubMessage

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<PCollection<Row>,PCollection<PubsubMessage>>

org.apache.beam.sdk.extensions.sql.meta.provider.pubsub.RowToPubsubMessage

All Implemented Interfaces:

java.io.Serializable, HasDisplayData

@Experimental
public class RowToPubsubMessage
extends PTransform<PCollection<Row>,PCollection<PubsubMessage>>

A PTransform to convert Row to PubsubMessage with JSON payload.

Currently only supports writing a flat schema into a JSON payload. This means that all Row field values are written to the PubsubMessage JSON payload, except for event_timestamp, which is either ignored or written to the message attributes, depending on whether PubsubJsonTableProvider.PubsubIOTableConfiguration.getTimestampAttribute() is set.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.beam.sdk.transforms.PTransform

name

Method Summary

Modifier and Type	Method and Description
PCollection<PubsubMessage>	expand(PCollection<Row> input) Override this method to specify how this PTransform should be expanded on the given InputT.
static RowToPubsubMessage	fromTableConfig(PubsubJsonTableProvider.PubsubIOTableConfiguration config)

Methods inherited from class org.apache.beam.sdk.transforms.PTransform

compose, compose, getAdditionalInputs, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, populateDisplayData, toString, validate

Methods inherited from class java.lang.Object

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

Method Detail

fromTableConfig

public static RowToPubsubMessage fromTableConfig(PubsubJsonTableProvider.PubsubIOTableConfiguration config)

expand

public PCollection<PubsubMessage> expand(PCollection<Row> 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<Row>,PCollection<PubsubMessage>>