Package org.apache.beam.sdk.io

Class AvroIO.ReadFiles<T>

java.lang.Object

org.apache.beam.sdk.transforms.PTransform<PCollection<FileIO.ReadableFile>,PCollection<T>>

org.apache.beam.sdk.io.AvroIO.ReadFiles<T>

All Implemented Interfaces:

java.io.Serializable, HasDisplayData

Enclosing class:

AvroIO

public abstract static class AvroIO.ReadFiles<T>
extends PTransform<PCollection<FileIO.ReadableFile>,PCollection<T>>

Implementation of AvroIO.readFiles(java.lang.Class<T>).

See Also:

Serialized Form

Field Summary

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

name, resourceHints

Constructor Summary

Constructors

Constructor	Description
ReadFiles()

Method Summary

Modifier and Type	Method	Description
PCollection<T>	expand(PCollection<FileIO.ReadableFile> input)	Override this method to specify how this PTransform should be expanded on the given InputT.
void	populateDisplayData(DisplayData.Builder builder)	Register display data for the given transform or component.
AvroIO.ReadFiles<T>	withBeamSchemas(boolean withBeamSchemas)	If set to true, a Beam schema will be inferred from the AVRO schema.
AvroIO.ReadFiles<T>	withDatumReaderFactory(AvroSource.DatumReaderFactory<T> factory)
AvroIO.ReadFiles<T>	withFileExceptionHandler(ReadAllViaFileBasedSource.ReadFileRangesFnExceptionHandler exceptionHandler)	Specifies if exceptions should be logged only for streaming pipelines.
AvroIO.ReadFiles<T>	withUsesReshuffle(boolean usesReshuffle)	Specifies if a Reshuffle should run before file reads occur.

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

compose, compose, getAdditionalInputs, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, setResourceHints, toString, validate, validate

Methods inherited from class java.lang.Object

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

Constructor Detail

ReadFiles

public ReadFiles()

Method Detail

withUsesReshuffle

@Experimental(FILESYSTEM)
public AvroIO.ReadFiles<T> withUsesReshuffle(boolean usesReshuffle)

Specifies if a Reshuffle should run before file reads occur.

withFileExceptionHandler

@Experimental(FILESYSTEM)
public AvroIO.ReadFiles<T> withFileExceptionHandler(ReadAllViaFileBasedSource.ReadFileRangesFnExceptionHandler exceptionHandler)

Specifies if exceptions should be logged only for streaming pipelines.

withBeamSchemas

@Experimental(SCHEMAS)
public AvroIO.ReadFiles<T> withBeamSchemas(boolean withBeamSchemas)

If set to true, a Beam schema will be inferred from the AVRO schema. This allows the output to be used by SQL and by the schema-transform library.

withDatumReaderFactory

public AvroIO.ReadFiles<T> withDatumReaderFactory(AvroSource.DatumReaderFactory<T> factory)

expand

public PCollection<T> expand(PCollection<FileIO.ReadableFile> 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<FileIO.ReadableFile>,PCollection<T>>

populateDisplayData

public void populateDisplayData(DisplayData.Builder builder)

Description copied from class: PTransform

Register display data for the given transform or component.

populateDisplayData(DisplayData.Builder) is invoked by Pipeline runners to collect display data via DisplayData.from(HasDisplayData). Implementations may call super.populateDisplayData(builder) in order to register display data in the current namespace, but should otherwise use subcomponent.populateDisplayData(builder) to use the namespace of the subcomponent.

By default, does not register any display data. Implementors may override this method to provide their own display data.

Specified by:

populateDisplayData in interface HasDisplayData

Overrides:

populateDisplayData in class PTransform<PCollection<FileIO.ReadableFile>,PCollection<T>>

Parameters:

builder - The builder to populate with display data.

See Also:

HasDisplayData