Package org.eclipse.rdf4j.query.algebra.evaluation.impl

Class AbstractEvaluationStrategyFactory

java.lang.Object

org.eclipse.rdf4j.query.algebra.evaluation.impl.AbstractEvaluationStrategyFactory

All Implemented Interfaces:

EvaluationStrategyFactory

Direct Known Subclasses:

ExtendedEvaluationStrategyFactory, StrictEvaluationStrategyFactory

public abstract class AbstractEvaluationStrategyFactory
extends Object
implements EvaluationStrategyFactory

Abstract base class for ExtendedEvaluationStrategy.

Author:

Jeen Broekstra

Constructor Summary

Constructors

Constructor	Description
AbstractEvaluationStrategyFactory()

Method Summary

Modifier and Type	Method	Description
Optional<QueryOptimizerPipeline>	getOptimizerPipeline()	Get the QueryOptimizerPipeline that this factory will inject into the EvaluationStrategy, if any.
long	getQuerySolutionCacheThreshold()	Get the number of query solutions the EvaluationStrategy will keep in main memory before it attempts to sync to a temporary disk cache.
boolean	isTrackResultSize()	Returns the status of the result size tracking for the query plan.
void	setOptimizerPipeline(QueryOptimizerPipeline pipeline)	Set a QueryOptimizerPipeline to be used for query execution planning by the EvaluationStrategy.
void	setQuerySolutionCacheThreshold(long threshold)	Set the number of query solutions the EvaluationStrategy will keep in main memory before it attempts to sync to a temporary disk cache.
void	setTrackResultSize(boolean trackResultSize)	Enable or disable results size tracking for the query plan.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.rdf4j.query.algebra.evaluation.EvaluationStrategyFactory

createEvaluationStrategy

Constructor Detail

AbstractEvaluationStrategyFactory

public AbstractEvaluationStrategyFactory()

Method Detail

setQuerySolutionCacheThreshold

public void setQuerySolutionCacheThreshold(long threshold)

Description copied from interface: EvaluationStrategyFactory

Set the number of query solutions the EvaluationStrategy will keep in main memory before it attempts to sync to a temporary disk cache. If set to 0, no disk caching will occur. EvaluationStrategies that provide no disk caching functionality are free to ignore this parameter.

Specified by:

setQuerySolutionCacheThreshold in interface EvaluationStrategyFactory

Parameters:

threshold - the number of query solutions that the EvaluationStrategy can cache in main memory before attempting disk sync.

getQuerySolutionCacheThreshold

public long getQuerySolutionCacheThreshold()

Description copied from interface: EvaluationStrategyFactory

Get the number of query solutions the EvaluationStrategy will keep in main memory before it attempts to sync to a temporary disk cache. If set to 0, no disk caching will occur. EvaluationStrategies that provide no disk caching functionality are free to ignore this parameter.

Specified by:

getQuerySolutionCacheThreshold in interface EvaluationStrategyFactory

setOptimizerPipeline

public void setOptimizerPipeline(QueryOptimizerPipeline pipeline)

Description copied from interface: EvaluationStrategyFactory

Set a QueryOptimizerPipeline to be used for query execution planning by the EvaluationStrategy.

Specified by:

setOptimizerPipeline in interface EvaluationStrategyFactory

Parameters:

pipeline - a QueryOptimizerPipeline

getOptimizerPipeline

public Optional<QueryOptimizerPipeline> getOptimizerPipeline()

Description copied from interface: EvaluationStrategyFactory

Get the QueryOptimizerPipeline that this factory will inject into the EvaluationStrategy, if any. If no QueryOptimizerPipeline is defined, the EvaluationStrategy itself determines the pipeline.

Specified by:

getOptimizerPipeline in interface EvaluationStrategyFactory

Returns:

a QueryOptimizerPipeline, or Optional.empty() if no pipeline is set on this factory.

isTrackResultSize

public boolean isTrackResultSize()

Description copied from interface: EvaluationStrategyFactory

Returns the status of the result size tracking for the query plan. Useful to determine which parts of a query plan generated the most data.

Specified by:

isTrackResultSize in interface EvaluationStrategyFactory

Returns:

true if result size tracking is enabled.

setTrackResultSize

public void setTrackResultSize(boolean trackResultSize)

Description copied from interface: EvaluationStrategyFactory

Enable or disable results size tracking for the query plan. Useful to determine which parts of a query plan generated the most data.

Specified by:

setTrackResultSize in interface EvaluationStrategyFactory

Parameters:

trackResultSize - true to enable tracking.