Package org.apache.flink.streaming.runtime.translators

Class CacheTransformationTranslator<OUT,T extends CacheTransformation<OUT>>

java.lang.Object

org.apache.flink.streaming.api.graph.SimpleTransformationTranslator<OUT,T>

org.apache.flink.streaming.runtime.translators.CacheTransformationTranslator<OUT,T>

All Implemented Interfaces:

TransformationTranslator<OUT,T>

@Internal
public class CacheTransformationTranslator<OUT,T extends CacheTransformation<OUT>>
extends SimpleTransformationTranslator<OUT,T>

Translator for CacheTransformationTranslator.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	CacheTransformationTranslator.IdentityStreamOperator<T>	The CacheTransformationTranslator.IdentityStreamOperator acts as a dummy source to consume cached intermediate dataset.
static class	CacheTransformationTranslator.NoOpStreamOperator<T>	The CacheTransformationTranslator.NoOpStreamOperator acts as a dummy sink so that the upstream can produce the intermediate dataset to be cached.

Nested classes/interfaces inherited from interface org.apache.flink.streaming.api.graph.TransformationTranslator

TransformationTranslator.Context

Field Summary

Fields

Modifier and Type	Field	Description
static final String	CACHE_CONSUMER_OPERATOR_NAME
static final String	CACHE_PRODUCER_OPERATOR_NAME

Constructor Summary

Constructors

Constructor	Description
CacheTransformationTranslator()

Method Summary

Modifier and Type	Method	Description
protected Collection<Integer>	translateForBatchInternal(T transformation, TransformationTranslator.Context context)	Translates a given Transformation to its runtime implementation for BATCH-style execution.
protected Collection<Integer>	translateForStreamingInternal(T transformation, TransformationTranslator.Context context)	Translates a given Transformation to its runtime implementation for STREAMING-style execution.

Methods inherited from class org.apache.flink.streaming.api.graph.SimpleTransformationTranslator

translateForBatch, translateForStreaming

Methods inherited from class java.lang.Object

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

Field Details

CACHE_CONSUMER_OPERATOR_NAME

public static final String CACHE_CONSUMER_OPERATOR_NAME

See Also:

• Constant Field Values

CACHE_PRODUCER_OPERATOR_NAME

public static final String CACHE_PRODUCER_OPERATOR_NAME

See Also:

• Constant Field Values

Constructor Details

CacheTransformationTranslator

public CacheTransformationTranslator()

Method Details

translateForBatchInternal

protected Collection<Integer> translateForBatchInternal(T transformation,
 TransformationTranslator.Context context)

Description copied from class: SimpleTransformationTranslator

Translates a given Transformation to its runtime implementation for BATCH-style execution.

Specified by:

translateForBatchInternal in class SimpleTransformationTranslator<OUT,T extends CacheTransformation<OUT>>

Parameters:

transformation - The transformation to be translated.

context - The translation context.

Returns:

The ids of the "last" StreamNodes in the transformation graph corresponding to this transformation. These will be the nodes that a potential following transformation will need to connect to.

translateForStreamingInternal

protected Collection<Integer> translateForStreamingInternal(T transformation,
 TransformationTranslator.Context context)

Description copied from class: SimpleTransformationTranslator

Translates a given Transformation to its runtime implementation for STREAMING-style execution.

Specified by:

translateForStreamingInternal in class SimpleTransformationTranslator<OUT,T extends CacheTransformation<OUT>>

Parameters:

transformation - The transformation to be translated.

context - The translation context.

Returns:

The ids of the "last" StreamNodes in the transformation graph corresponding to this transformation. These will be the nodes that a potential following transformation will need to connect to.