org.apache.flink.api.common.operators.base

Class BulkIterationBase<T>

java.lang.Object

org.apache.flink.api.common.operators.Operator<OUT>

org.apache.flink.api.common.operators.AbstractUdfOperator<OUT,FT>

org.apache.flink.api.common.operators.SingleInputOperator<T,T,AbstractRichFunction>

org.apache.flink.api.common.operators.base.BulkIterationBase<T>

All Implemented Interfaces:

IterationOperator, Visitable<Operator<?>>

@Internal
public class BulkIterationBase<T>
extends SingleInputOperator<T,T,AbstractRichFunction>
implements IterationOperator

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	BulkIterationBase.PartialSolutionPlaceHolder<OT> Specialized operator to use as a recognizable place-holder for the input to the step function when composing the nested data flow.
static class	BulkIterationBase.TerminationCriterionAggregationConvergence Convergence for the termination criterion is reached if no tuple is output at current iteration for the termination criterion branch
static class	BulkIterationBase.TerminationCriterionAggregator Aggregator that basically only adds 1 for every output tuple of the termination criterion branch
static class	BulkIterationBase.TerminationCriterionMapper<X> Special Mapper that is added before a termination criterion and is only a container for an special aggregator

Field Summary

Fields

Modifier and Type	Field and Description
static String	TERMINATION_CRITERION_AGGREGATOR_NAME
protected Operator<?>	terminationCriterion

Fields inherited from class org.apache.flink.api.common.operators.SingleInputOperator

input

Fields inherited from class org.apache.flink.api.common.operators.AbstractUdfOperator

broadcastInputs, userFunction

Fields inherited from class org.apache.flink.api.common.operators.Operator

compilerHints, name, operatorInfo, parameters

Constructor Summary

Constructors

Constructor and Description
BulkIterationBase(UnaryOperatorInformation<T,T> operatorInfo)
BulkIterationBase(UnaryOperatorInformation<T,T> operatorInfo, String name)

Method Summary

Modifier and Type	Method and Description
protected List<T>	executeOnCollections(List<T> inputData, RuntimeContext runtimeContext, ExecutionConfig executionConfig)
AggregatorRegistry	getAggregators()
Map<String,Operator<?>>	getBroadcastInputs() The BulkIteration meta operator cannot have broadcast inputs.
int	getMaximumNumberOfIterations()
Operator<T>	getNextPartialSolution()
Operator<T>	getPartialSolution()
Operator<?>	getTerminationCriterion()
void	setBroadcastVariable(String name, Operator<?> root) The BulkIteration meta operator cannot have broadcast inputs.
<X> void	setBroadcastVariables(Map<String,Operator<X>> inputs) The BulkIteration meta operator cannot have broadcast inputs.
void	setMaximumNumberOfIterations(int num)
void	setNextPartialSolution(Operator<T> result)
<X> void	setTerminationCriterion(Operator<X> criterion)
void	validate()

Methods inherited from class org.apache.flink.api.common.operators.SingleInputOperator

accept, addInput, addInput, clearInputs, getInput, getKeyColumns, getNumberOfInputs, getOperatorInfo, getSemanticProperties, setInput, setInput, setInputs, setSemanticProperties

Methods inherited from class org.apache.flink.api.common.operators.AbstractUdfOperator

asArray, emptyClassArray, getUserCodeWrapper

Methods inherited from class org.apache.flink.api.common.operators.Operator

createUnionCascade, createUnionCascade, createUnionCascade, getCompilerHints, getMinResources, getName, getParallelism, getParameters, getPreferredResources, setName, setParallelism, setParameter, setParameter, setParameter, setResources, toString

Methods inherited from class java.lang.Object

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

Field Detail

TERMINATION_CRITERION_AGGREGATOR_NAME

public static final String TERMINATION_CRITERION_AGGREGATOR_NAME

See Also:

Constant Field Values

terminationCriterion

protected Operator<?> terminationCriterion

Constructor Detail

BulkIterationBase

public BulkIterationBase(UnaryOperatorInformation<T,T> operatorInfo)

BulkIterationBase

public BulkIterationBase(UnaryOperatorInformation<T,T> operatorInfo,
                         String name)

Parameters:

name -

Method Detail

getPartialSolution

public Operator<T> getPartialSolution()

Returns:

The operator representing the partial solution.

setNextPartialSolution

public void setNextPartialSolution(Operator<T> result)

Parameters:

result -

getNextPartialSolution

public Operator<T> getNextPartialSolution()

Returns:

The operator representing the next partial solution.

getTerminationCriterion

public Operator<?> getTerminationCriterion()

Returns:

The operator representing the termination criterion.

setTerminationCriterion

public <X> void setTerminationCriterion(Operator<X> criterion)

Parameters:

criterion -

setMaximumNumberOfIterations

public void setMaximumNumberOfIterations(int num)

Parameters:

num -

getMaximumNumberOfIterations

public int getMaximumNumberOfIterations()

getAggregators

public AggregatorRegistry getAggregators()

Specified by:

getAggregators in interface IterationOperator

validate

public void validate()
              throws InvalidProgramException

Throws:

InvalidProgramException

getBroadcastInputs

public Map<String,Operator<?>> getBroadcastInputs()

The BulkIteration meta operator cannot have broadcast inputs.

Overrides:

getBroadcastInputs in class AbstractUdfOperator<T,AbstractRichFunction>

Returns:

An empty map.

setBroadcastVariable

public void setBroadcastVariable(String name,
                                 Operator<?> root)

The BulkIteration meta operator cannot have broadcast inputs. This method always throws an exception.

Overrides:

setBroadcastVariable in class AbstractUdfOperator<T,AbstractRichFunction>

Parameters:

name - Ignored.

root - Ignored.

setBroadcastVariables

public <X> void setBroadcastVariables(Map<String,Operator<X>> inputs)

The BulkIteration meta operator cannot have broadcast inputs. This method always throws an exception.

Overrides:

setBroadcastVariables in class AbstractUdfOperator<T,AbstractRichFunction>

Parameters:

inputs - Ignored

executeOnCollections

protected List<T> executeOnCollections(List<T> inputData,
                                       RuntimeContext runtimeContext,
                                       ExecutionConfig executionConfig)

Specified by:

executeOnCollections in class SingleInputOperator<T,T,AbstractRichFunction>