com.google.cloud.dataflow.sdk.io

Class DatastoreIO.Sink

java.lang.Object

com.google.cloud.dataflow.sdk.transforms.PTransform<PCollection<com.google.api.services.datastore.DatastoreV1.Entity>,PDone>

com.google.cloud.dataflow.sdk.io.DatastoreIO.Sink

All Implemented Interfaces:

java.io.Serializable

Enclosing class:

DatastoreIO

public static class DatastoreIO.Sink
extends PTransform<PCollection<com.google.api.services.datastore.DatastoreV1.Entity>,PDone>

A PTransform that writes a PCollection<Entity> containing entities to a Datastore kind.

Current version only supports Write operation running on DirectPipelineRunner. If Write is used on DataflowPipelineRunner, it throws UnsupportedOperationException and won't continue on the operation.

See Also:

Serialized Form

Field Summary

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

name

Method Summary

Methods

Modifier and Type	Method and Description
PDone	apply(PCollection<com.google.api.services.datastore.DatastoreV1.Entity> input) Applies this PTransform on the given Input, and returns its Output.
protected Coder<java.lang.Void>	getDefaultOutputCoder() Returns the default Coder to use for the output of this single-output PTransform, or null if none can be inferred.
protected java.lang.String	getKindString() Returns a string describing what kind of PTransform this is.
DatastoreIO.Sink	named(java.lang.String name) Returns a DatastoreIO.Write PTransform with the name associated with this PTransform.
DatastoreIO.Sink	to(java.lang.String datasetId) Returns a DatastoreIO.Write PTransform with given datasetId.
DatastoreIO.Sink	withHost(java.lang.String host) Returns a new DatastoreIO.Write PTransform with specified host.

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

finishSpecifying, getCoderRegistry, getDefaultName, getDefaultOutputCoder, getInput, getName, getOutput, getPipeline, setName, setPipeline, toString, withName

Methods inherited from class java.lang.Object

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

Method Detail

named

public DatastoreIO.Sink named(java.lang.String name)

Returns a DatastoreIO.Write PTransform with the name associated with this PTransform.

to

public DatastoreIO.Sink to(java.lang.String datasetId)

Returns a DatastoreIO.Write PTransform with given datasetId.

withHost

public DatastoreIO.Sink withHost(java.lang.String host)

Returns a new DatastoreIO.Write PTransform with specified host.

apply

public PDone apply(PCollection<com.google.api.services.datastore.DatastoreV1.Entity> input)

Description copied from class: PTransform

Applies this PTransform on the given Input, 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<Input, Output>, Input).

Overrides:

apply in class PTransform<PCollection<com.google.api.services.datastore.DatastoreV1.Entity>,PDone>

getKindString

protected java.lang.String getKindString()

Description copied from class: PTransform

Returns a string describing what kind of PTransform this is.

By default, returns the base name of this PTransform's class.

Overrides:

getKindString in class PTransform<PCollection<com.google.api.services.datastore.DatastoreV1.Entity>,PDone>

getDefaultOutputCoder

protected Coder<java.lang.Void> getDefaultOutputCoder()

Description copied from class: PTransform

Returns the default Coder to use for the output of this single-output PTransform, or null if none can be inferred.

By default, returns null.

Overrides:

getDefaultOutputCoder in class PTransform<PCollection<com.google.api.services.datastore.DatastoreV1.Entity>,PDone>