Package org.aksw.commons.collector.core

Class AggErrorHandler<I,E,O,SUBACC extends Accumulator<I,E,O>,SUBAGG extends ParallelAggregator<I,E,O,SUBACC>>

java.lang.Object

org.aksw.commons.collector.core.AggErrorHandler<I,E,O,SUBACC,SUBAGG>

All Implemented Interfaces:

Serializable, Aggregator<I,E,O>, ParallelAggregator<I,E,O,AggErrorHandler.AccError<I,E,O,SUBACC>>

public class AggErrorHandler<I,E,O,SUBACC extends Accumulator<I,E,O>,SUBAGG extends ParallelAggregator<I,E,O,SUBACC>>
extends Object
implements ParallelAggregator<I,E,O,AggErrorHandler.AccError<I,E,O,SUBACC>>, Serializable

Wraps another aggregator such that if accumulation fails with an exception an error counter is increased. If the error counter is non zero then the accumulated value will always be null

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	AggErrorHandler.AccError<I,E,O,SUBACC extends Accumulator<I,E,O>>
class	AggErrorHandler.AccErrorImpl

Field Summary

Fields

Modifier and Type	Field	Description
protected Consumer<? super Throwable>	errorCallback
protected Function<AggErrorHandler.AccError<I,E,O,SUBACC>,O>	errorValueExtractor
protected boolean	subAccDespiteError	Whether to delegate accumulate calls to the sub-accumulator despite error.
protected SUBAGG	subAgg

Constructor Summary

Constructors

Constructor	Description
AggErrorHandler(SUBAGG subAgg, boolean subAccDespiteError, Consumer<? super Throwable> errorCallback, Function<AggErrorHandler.AccError<I,E,O,SUBACC>,O> errorValueExtractor)

Method Summary

Modifier and Type	Method	Description
AggErrorHandler.AccError<I,E,O,SUBACC>	combine(AggErrorHandler.AccError<I,E,O,SUBACC> a, AggErrorHandler.AccError<I,E,O,SUBACC> b)	Combine accumulators.
AggErrorHandler.AccError<I,E,O,SUBACC>	createAccumulator()
boolean	equals(Object obj)
int	hashCode()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.aksw.commons.collector.domain.Aggregator

accumulateAll, accumulateAll, accumulateAll, finish

Methods inherited from interface org.aksw.commons.collector.domain.ParallelAggregator

asCollector, asCollector, combineRaw

Field Details

subAgg

protected SUBAGG extends ParallelAggregator<I,E,O,SUBACC> subAgg

errorValueExtractor

protected Function<AggErrorHandler.AccError<I,E,O,SUBACC extends Accumulator<I,E,O>>,O> errorValueExtractor

errorCallback

protected Consumer<? super Throwable> errorCallback

subAccDespiteError

protected boolean subAccDespiteError

Whether to delegate accumulate calls to the sub-accumulator despite error. BEWARE when using en errorValueExtractor: If subAccDespiteError is false then combining accumulators will result in a null accumulator

Constructor Details

AggErrorHandler

public AggErrorHandler(SUBAGG subAgg,
 boolean subAccDespiteError,
 Consumer<? super Throwable> errorCallback,
 Function<AggErrorHandler.AccError<I,E,O,SUBACC>,O> errorValueExtractor)

Method Details

createAccumulator

public AggErrorHandler.AccError<I,E,O,SUBACC> createAccumulator()

Specified by:

createAccumulator in interface Aggregator<I,E,O>

Specified by:

createAccumulator in interface ParallelAggregator<I,E,O,SUBACC extends Accumulator<I,E,O>>

combine

public AggErrorHandler.AccError<I,E,O,SUBACC> combine(AggErrorHandler.AccError<I,E,O,SUBACC> a,
 AggErrorHandler.AccError<I,E,O,SUBACC> b)

Description copied from interface: ParallelAggregator

Combine accumulators. This method is allowed to mutate any of if its arguments, hence accumulators should be considered exhausted after combination.

Specified by:

combine in interface ParallelAggregator<I,E,O,SUBACC extends Accumulator<I,E,O>>

Parameters:

a - First participant of combination

b - Second participant of combination

Returns:

Combined accumulator

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object