com.google.cloud.dataflow.sdk.io

Class PubsubIO.Write.Bound<T>

java.lang.Object

com.google.cloud.dataflow.sdk.transforms.PTransform<PCollection<T>,PDone>

com.google.cloud.dataflow.sdk.io.PubsubIO.Write.Bound<T>

All Implemented Interfaces:

Serializable

Enclosing class:

PubsubIO.Write

public static class PubsubIO.Write.Bound<T>
extends PTransform<PCollection<T>,PDone>

A PTransform that writes an unbounded PCollection of Strings to a Cloud Pub/Sub stream.

See Also:

Serialized Form

Field Summary

Fields inherited from class com.google.cloud.dataflow.sdk.transforms.PTransform

name

Method Summary

Modifier and Type	Method and Description
PDone	apply(PCollection<T> input) Applies this PTransform on the given InputT, and returns its Output.
Coder<T>	getCoder()
protected Coder<Void>	getDefaultOutputCoder() Returns the default Coder to use for the output of this single-output PTransform.
String	getIdLabel()
String	getTimestampLabel()
PubsubIO.PubsubTopic	getTopic()
PubsubIO.Write.Bound<T>	idLabel(String idLabel) Returns a new transform that's like this one but that publishes unique record IDs to a message attribute with the specified name.
PubsubIO.Write.Bound<T>	named(String name) Returns a new transform that's like this one but with the specified step name.
PubsubIO.Write.Bound<T>	timestampLabel(String timestampLabel) Returns a new transform that's like this one but that publishes record timestamps to a message attribute with the specified name.
PubsubIO.Write.Bound<T>	topic(String topic) Returns a new transform that's like this one but that writes to the specified topic.
<X> PubsubIO.Write.Bound<X>	withCoder(Coder<X> coder) Returns a new transform that's like this one but that uses the given Coder to encode each of the elements of the input PCollection into an output record.

Methods inherited from class com.google.cloud.dataflow.sdk.transforms.PTransform

getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, toString, validate

Methods inherited from class java.lang.Object

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

Method Detail

named

public PubsubIO.Write.Bound<T> named(String name)

Returns a new transform that's like this one but with the specified step name.

Does not modify this object.

topic

public PubsubIO.Write.Bound<T> topic(String topic)

Returns a new transform that's like this one but that writes to the specified topic.

See PubsubIO.PubsubTopic.fromPath(String) for more details on the format of the topic string.

Does not modify this object.

timestampLabel

public PubsubIO.Write.Bound<T> timestampLabel(String timestampLabel)

Returns a new transform that's like this one but that publishes record timestamps to a message attribute with the specified name. See PubsubIO.Write.timestampLabel(String) for more details.

Does not modify this object.

idLabel

public PubsubIO.Write.Bound<T> idLabel(String idLabel)

Returns a new transform that's like this one but that publishes unique record IDs to a message attribute with the specified name. See PubsubIO.Write.idLabel(String) for more details.

Does not modify this object.

withCoder

public <X> PubsubIO.Write.Bound<X> withCoder(Coder<X> coder)

Returns a new transform that's like this one but that uses the given Coder to encode each of the elements of the input PCollection into an output record.

Does not modify this object.

Type Parameters:

X - the type of the elements of the input PCollection

apply

public PDone apply(PCollection<T> input)

Description copied from class: PTransform

Applies this PTransform on the given InputT, and returns its Output.

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).

The default implementation throws an exception. A derived class must either implement apply, or else each runner must supply a custom implementation via PipelineRunner.apply(com.google.cloud.dataflow.sdk.transforms.PTransform<InputT, OutputT>, InputT).

Overrides:

apply in class PTransform<PCollection<T>,PDone>

getDefaultOutputCoder

protected Coder<Void> getDefaultOutputCoder()

Description copied from class: PTransform

Returns the default Coder to use for the output of this single-output PTransform.

By default, always throws

Overrides:

getDefaultOutputCoder in class PTransform<PCollection<T>,PDone>

getTopic

public PubsubIO.PubsubTopic getTopic()

getTimestampLabel

public String getTimestampLabel()

getIdLabel

public String getIdLabel()

getCoder

public Coder<T> getCoder()