org.apache.beam.sdk.extensions.avro.io

Class AvroIO.ReadFiles<T>

java.lang.Object

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

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

All Implemented Interfaces:

java.io.Serializable, org.apache.beam.sdk.transforms.display.HasDisplayData

Enclosing class:

AvroIO

public abstract static class AvroIO.ReadFiles<T>
extends org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.io.FileIO.ReadableFile>,org.apache.beam.sdk.values.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 and Description
ReadFiles()

Method Summary

Modifier and Type	Method and Description
org.apache.beam.sdk.values.PCollection<T>	expand(org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.io.FileIO.ReadableFile> input)
void	populateDisplayData(org.apache.beam.sdk.transforms.display.DisplayData.Builder builder)
AvroIO.ReadFiles<T>	withBeamSchemas(boolean withBeamSchemas) If set to true, a Beam schema will be inferred from the AVRO schema.
AvroIO.ReadFiles<T>	withCoder(org.apache.beam.sdk.coders.Coder<T> coder) Sets a coder for the result of the read function.
AvroIO.ReadFiles<T>	withDatumReaderFactory(AvroSource.DatumReaderFactory<T> factory) Sets a custom AvroSource.DatumReaderFactory for reading.
AvroIO.ReadFiles<T>	withDesiredBundleSizeBytes(long desiredBundleSizeBytes) Set a value for the bundle size for parallel reads.
AvroIO.ReadFiles<T>	withFileExceptionHandler(org.apache.beam.sdk.io.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

withDesiredBundleSizeBytes

public AvroIO.ReadFiles<T> withDesiredBundleSizeBytes(long desiredBundleSizeBytes)

Set a value for the bundle size for parallel reads. Default is 64 MB. You may want to use a lower value (e.g. 1 MB) for streaming applications.

withUsesReshuffle

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

Specifies if a Reshuffle should run before file reads occur.

withFileExceptionHandler

public AvroIO.ReadFiles<T> withFileExceptionHandler(org.apache.beam.sdk.io.ReadAllViaFileBasedSource.ReadFileRangesFnExceptionHandler exceptionHandler)

Specifies if exceptions should be logged only for streaming pipelines.

withBeamSchemas

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.

withCoder

public AvroIO.ReadFiles<T> withCoder(org.apache.beam.sdk.coders.Coder<T> coder)

Sets a coder for the result of the read function.

withDatumReaderFactory

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

Sets a custom AvroSource.DatumReaderFactory for reading. Pass a AvroDatumFactory to also use the factory for the default output AvroCoder

expand

public org.apache.beam.sdk.values.PCollection<T> expand(org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.io.FileIO.ReadableFile> input)

Specified by:

expand in class org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.io.FileIO.ReadableFile>,org.apache.beam.sdk.values.PCollection<T>>

populateDisplayData

public void populateDisplayData(org.apache.beam.sdk.transforms.display.DisplayData.Builder builder)

Specified by:

populateDisplayData in interface org.apache.beam.sdk.transforms.display.HasDisplayData

Overrides:

populateDisplayData in class org.apache.beam.sdk.transforms.PTransform<org.apache.beam.sdk.values.PCollection<org.apache.beam.sdk.io.FileIO.ReadableFile>,org.apache.beam.sdk.values.PCollection<T>>