Package org.apache.wayang.flink.operators

Class FlinkReduceByOperator<InputType,KeyType>

java.lang.Object

org.apache.wayang.core.plan.wayangplan.OperatorBase

org.apache.wayang.core.plan.wayangplan.UnaryToUnaryOperator<Type,Type>

org.apache.wayang.basic.operators.ReduceByOperator<InputType,KeyType>

org.apache.wayang.flink.operators.FlinkReduceByOperator<InputType,KeyType>

All Implemented Interfaces:

Serializable, ActualOperator, ElementaryOperator, ExecutionOperator, Operator, FlinkExecutionOperator

public class FlinkReduceByOperator<InputType,KeyType>
extends ReduceByOperator<InputType,KeyType>
implements FlinkExecutionOperator

Flink implementation of the ReduceByOperator.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.wayang.core.plan.wayangplan.OperatorBase

OperatorBase.GsonSerializer

Field Summary

Fields inherited from class org.apache.wayang.basic.operators.ReduceByOperator

keyDescriptor, reduceDescriptor

Fields inherited from class org.apache.wayang.core.plan.wayangplan.OperatorBase

inputSlots, outputSlots, STANDARD_OPERATOR_ARGS

Fields inherited from interface org.apache.wayang.core.plan.wayangplan.Operator

FIRST_EPOCH

Constructor Summary

Constructors

Constructor	Description
FlinkReduceByOperator(ReduceByOperator<InputType,KeyType> that)	Copies an instance (exclusive of broadcasts).
FlinkReduceByOperator(DataSetType<InputType> type, TransformationDescriptor<InputType,KeyType> keyDescriptor, ReduceDescriptor<InputType> reduceDescriptor)	Creates a new instance.

Method Summary

Modifier and Type	Method	Description
boolean	containsAction()	Tell whether this instances is a Flink action.
protected ExecutionOperator	createCopy()
Optional<LoadProfileEstimator>	createLoadProfileEstimator(Configuration configuration)	Developers of ExecutionOperators can provide a default LoadProfileEstimator via this method.
Tuple<Collection<ExecutionLineageNode>,Collection<ChannelInstance>>	evaluate(ChannelInstance[] inputs, ChannelInstance[] outputs, FlinkExecutor flinkExecutor, OptimizationContext.OperatorContext operatorContext)
String	getLoadProfileEstimatorConfigurationKey()
List<ChannelDescriptor>	getSupportedInputChannels(int index)	Display the supported Channels for a certain InputSlot.
List<ChannelDescriptor>	getSupportedOutputChannels(int index)	Display the supported Channels for a certain OutputSlot.

Methods inherited from class org.apache.wayang.basic.operators.ReduceByOperator

createCardinalityEstimator, getKeyDescriptor, getReduceDescriptor, getType

Methods inherited from class org.apache.wayang.core.plan.wayangplan.UnaryToUnaryOperator

getInput, getInputType, getOutput, getOutputType

Methods inherited from class org.apache.wayang.core.plan.wayangplan.OperatorBase

accept, addBroadcastInput, addTargetPlatform, at, collectMappedInputSlots, collectMappedOutputSlots, copy, getAllInputs, getAllOutputs, getCardinalityEstimator, getContainer, getEpoch, getName, getOriginal, getSimpleClassName, getTargetPlatforms, isAuxiliary, isSupportingBroadcastInputs, propagateInputCardinality, propagateOutputCardinality, setAuxiliary, setCardinalityEstimator, setContainer, setEpoch, setName, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.wayang.core.plan.wayangplan.ActualOperator

accept

Methods inherited from interface org.apache.wayang.core.plan.wayangplan.ElementaryOperator

createCardinalityEstimator, getCardinalityEstimator, isAuxiliary, setAuxiliary, setCardinalityEstimator

Methods inherited from interface org.apache.wayang.core.plan.wayangplan.ExecutionOperator

copy, createOutputChannelInstances, getLimitBaseKey, getLoadProfileEstimatorConfigurationKeys, getOriginal, getOutputChannelDescriptor, isFiltered

Methods inherited from interface org.apache.wayang.flink.operators.FlinkExecutionOperator

getBroadCastFunction, getPlatform

Methods inherited from interface org.apache.wayang.core.plan.wayangplan.Operator

addBroadcastInput, addTargetPlatform, broadcastTo, broadcastTo, collectMappedInputSlots, collectMappedOutputSlots, connectTo, connectTo, getAllInputs, getAllOutputs, getCardinalityPusher, getContainer, getEffectiveOccupant, getEffectiveOccupant, getEpoch, getEstimationContextProperties, getForwards, getInnermostLoop, getInput, getInput, getLoopStack, getName, getNumBroadcastInputs, getNumInputs, getNumOutputs, getNumRegularInputs, getOuterInputSlot, getOutermostInputSlot, getOutermostOutputSlots, getOutput, getOutput, getParent, getTargetPlatforms, isAlternative, isConversion, isElementary, isExecutionOperator, isFeedbackInput, isFeedforwardOutput, isLoopHead, isLoopSubplan, isOwnerOf, isReading, isSink, isSource, isSubplan, isSupportingBroadcastInputs, isUnconnected, propagateInputCardinality, propagateOutputCardinality, propagateOutputCardinality, replaceWith, setContainer, setEpoch, setInput, setName, setOutput

Constructor Details

FlinkReduceByOperator

public FlinkReduceByOperator(DataSetType<InputType> type,
 TransformationDescriptor<InputType,KeyType> keyDescriptor,
 ReduceDescriptor<InputType> reduceDescriptor)

Creates a new instance.

Parameters:

type - type of the reduce elements (i.e., type of UnaryToUnaryOperator.getInput() and UnaryToUnaryOperator.getOutput())

keyDescriptor - describes how to extract the key from data units

reduceDescriptor - describes the reduction to be performed on the elements

FlinkReduceByOperator

public FlinkReduceByOperator(ReduceByOperator<InputType,KeyType> that)

Copies an instance (exclusive of broadcasts).

Parameters:

that - that should be copied

Method Details

evaluate

public Tuple<Collection<ExecutionLineageNode>,Collection<ChannelInstance>> evaluate(ChannelInstance[] inputs,
 ChannelInstance[] outputs,
 FlinkExecutor flinkExecutor,
 OptimizationContext.OperatorContext operatorContext)

Specified by:

evaluate in interface FlinkExecutionOperator

createCopy

protected ExecutionOperator createCopy()

Overrides:

createCopy in class OperatorBase

getLoadProfileEstimatorConfigurationKey

public String getLoadProfileEstimatorConfigurationKey()

Specified by:

getLoadProfileEstimatorConfigurationKey in interface ExecutionOperator

createLoadProfileEstimator

public Optional<LoadProfileEstimator> createLoadProfileEstimator(Configuration configuration)

Description copied from interface: ExecutionOperator

Developers of ExecutionOperators can provide a default LoadProfileEstimator via this method.

Specified by:

createLoadProfileEstimator in interface ExecutionOperator

Parameters:

configuration - in which the LoadProfile should be estimated.

Returns:

an Optional that might contain the LoadProfileEstimator (but Optional.empty() by default)

getSupportedInputChannels

public List<ChannelDescriptor> getSupportedInputChannels(int index)

Description copied from interface: ExecutionOperator

Display the supported Channels for a certain InputSlot.

Specified by:

getSupportedInputChannels in interface ExecutionOperator

Parameters:

index - the index of the InputSlot

Returns:

an List of Channels' Classes, ordered by their preference of use

getSupportedOutputChannels

public List<ChannelDescriptor> getSupportedOutputChannels(int index)

Description copied from interface: ExecutionOperator

Display the supported Channels for a certain OutputSlot.

Specified by:

getSupportedOutputChannels in interface ExecutionOperator

Parameters:

index - the index of the OutputSlot

Returns:

an List of Channels' Classes, ordered by their preference of use

See Also:

• ExecutionOperator.getOutputChannelDescriptor(int)

containsAction

public boolean containsAction()

Description copied from interface: FlinkExecutionOperator

Tell whether this instances is a Flink action. This is important to keep track on when Flink is actually initialized.

Specified by:

containsAction in interface FlinkExecutionOperator

Returns:

whether this instance issues Flink actions