Package org.apache.beam.sdk.io.gcp.spanner

Class SpannerReadSchemaTransformProvider

java.lang.Object

org.apache.beam.sdk.schemas.transforms.TypedSchemaTransformProvider<SpannerReadSchemaTransformProvider.SpannerReadSchemaTransformConfiguration>

org.apache.beam.sdk.io.gcp.spanner.SpannerReadSchemaTransformProvider

All Implemented Interfaces:

SchemaTransformProvider

@AutoService(SchemaTransformProvider.class)
public class SpannerReadSchemaTransformProvider
extends TypedSchemaTransformProvider<SpannerReadSchemaTransformProvider.SpannerReadSchemaTransformConfiguration>

A provider for reading from Cloud Spanner using a Schema Transform Provider.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SpannerReadSchemaTransformProvider.ErrorFn
static class	SpannerReadSchemaTransformProvider.SpannerReadSchemaTransformConfiguration

Field Summary

Fields

Modifier and Type	Field	Description
static final Schema	ERROR_SCHEMA
static final TupleTag<Row>	ERROR_TAG
static final TupleTag<Row>	OUTPUT_TAG

Constructor Summary

Constructors

Constructor	Description
SpannerReadSchemaTransformProvider()

Method Summary

Modifier and Type	Method	Description
protected Class<SpannerReadSchemaTransformProvider.SpannerReadSchemaTransformConfiguration>	configurationClass()
String	description()	Returns a description regarding the SchemaTransform represented by the SchemaTransformProvider.
protected SchemaTransform	from(SpannerReadSchemaTransformProvider.SpannerReadSchemaTransformConfiguration configuration)	Produce a SchemaTransform from ConfigT.
String	identifier()	Returns an id that uniquely represents this transform.
List<String>	inputCollectionNames()	Returns the input collection names of this transform.
List<String>	outputCollectionNames()	Returns the output collection names of this transform.

Methods inherited from class org.apache.beam.sdk.schemas.transforms.TypedSchemaTransformProvider

configurationSchema, dependencies, from

Methods inherited from class java.lang.Object

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

Field Details

OUTPUT_TAG

public static final TupleTag<Row> OUTPUT_TAG

ERROR_TAG

public static final TupleTag<Row> ERROR_TAG

ERROR_SCHEMA

public static final Schema ERROR_SCHEMA

Constructor Details

SpannerReadSchemaTransformProvider

public SpannerReadSchemaTransformProvider()

Method Details

identifier

public String identifier()

Description copied from interface: SchemaTransformProvider

Returns an id that uniquely represents this transform.

description

public String description()

Description copied from interface: SchemaTransformProvider

Returns a description regarding the SchemaTransform represented by the SchemaTransformProvider. Please keep the language generic (i.e. not specific to any programming language). The description may be markdown formatted.

inputCollectionNames

public List<String> inputCollectionNames()

Description copied from interface: SchemaTransformProvider

Returns the input collection names of this transform.

outputCollectionNames

public List<String> outputCollectionNames()

Description copied from interface: SchemaTransformProvider

Returns the output collection names of this transform.

configurationClass

protected Class<SpannerReadSchemaTransformProvider.SpannerReadSchemaTransformConfiguration> configurationClass()

Overrides:

configurationClass in class TypedSchemaTransformProvider<SpannerReadSchemaTransformProvider.SpannerReadSchemaTransformConfiguration>

from

protected SchemaTransform from(SpannerReadSchemaTransformProvider.SpannerReadSchemaTransformConfiguration configuration)

Description copied from class: TypedSchemaTransformProvider

Produce a SchemaTransform from ConfigT. Can throw a InvalidConfigurationException or a InvalidSchemaException.

Specified by:

from in class TypedSchemaTransformProvider<SpannerReadSchemaTransformProvider.SpannerReadSchemaTransformConfiguration>