Package org.apache.beam.sdk.io

Class ReadAllViaFileBasedSourceTransform<InT,T>

java.lang.Object

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

org.apache.beam.sdk.io.ReadAllViaFileBasedSourceTransform<InT,T>

All Implemented Interfaces:

Serializable, HasDisplayData

Direct Known Subclasses:

ReadAllViaFileBasedSource, ReadAllViaFileBasedSourceWithFilename

public abstract class ReadAllViaFileBasedSourceTransform<InT,T>
extends PTransform<PCollection<FileIO.ReadableFile>,PCollection<T>>

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ReadAllViaFileBasedSourceTransform.AbstractReadFileRangesFn<InT,T>
static class	ReadAllViaFileBasedSourceTransform.SplitIntoRangesFn

Field Summary

Fields

Modifier and Type	Field	Description
protected final Coder<T>	coder
protected final SerializableFunction<String,? extends FileBasedSource<InT>>	createSource
static final boolean	DEFAULT_USES_RESHUFFLE
protected final long	desiredBundleSizeBytes
protected final ReadAllViaFileBasedSource.ReadFileRangesFnExceptionHandler	exceptionHandler
protected final boolean	usesReshuffle

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

annotations, displayData, name, resourceHints

Constructor Summary

Constructors

Constructor	Description
ReadAllViaFileBasedSourceTransform(long desiredBundleSizeBytes, SerializableFunction<String,? extends FileBasedSource<InT>> createSource, Coder<T> coder)
ReadAllViaFileBasedSourceTransform(long desiredBundleSizeBytes, SerializableFunction<String,? extends FileBasedSource<InT>> createSource, Coder<T> coder, boolean usesReshuffle, ReadAllViaFileBasedSource.ReadFileRangesFnExceptionHandler exceptionHandler)

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.
protected abstract DoFn<KV<FileIO.ReadableFile,OffsetRange>,T>	readRangesFn()

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

addAnnotation, compose, compose, getAdditionalInputs, getAnnotations, getDefaultOutputCoder, getDefaultOutputCoder, getDefaultOutputCoder, getKindString, getName, getResourceHints, populateDisplayData, setDisplayData, setResourceHints, toString, validate, validate

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_USES_RESHUFFLE

public static final boolean DEFAULT_USES_RESHUFFLE

See Also:

• Constant Field Values

desiredBundleSizeBytes

protected final long desiredBundleSizeBytes

createSource

protected final SerializableFunction<String,? extends FileBasedSource<InT>> createSource

coder

protected final Coder<T> coder

exceptionHandler

protected final ReadAllViaFileBasedSource.ReadFileRangesFnExceptionHandler exceptionHandler

usesReshuffle

protected final boolean usesReshuffle

Constructor Details

ReadAllViaFileBasedSourceTransform

public ReadAllViaFileBasedSourceTransform(long desiredBundleSizeBytes,
 SerializableFunction<String,? extends FileBasedSource<InT>> createSource,
 Coder<T> coder)

ReadAllViaFileBasedSourceTransform

public ReadAllViaFileBasedSourceTransform(long desiredBundleSizeBytes,
 SerializableFunction<String,? extends FileBasedSource<InT>> createSource,
 Coder<T> coder,
 boolean usesReshuffle,
 ReadAllViaFileBasedSource.ReadFileRangesFnExceptionHandler exceptionHandler)

Method Details

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>>

readRangesFn

protected abstract DoFn<KV<FileIO.ReadableFile,OffsetRange>,T> readRangesFn()