Package org.apache.wayang.profiler.log

Class DynamicLoadEstimator

java.lang.Object

org.apache.wayang.core.optimizer.costs.LoadEstimator

org.apache.wayang.profiler.log.DynamicLoadEstimator

public class DynamicLoadEstimator
extends LoadEstimator

Adjustable LoadProfileEstimator implementation.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	DynamicLoadEstimator.SinglePointEstimator

Nested classes/interfaces inherited from class org.apache.wayang.core.optimizer.costs.LoadEstimator

LoadEstimator.SinglePointEstimationFunction

Field Summary

Fields

Modifier and Type	Field	Description
static DynamicLoadEstimator	zeroLoad	Instance that always estimates a load of 0.

Fields inherited from class org.apache.wayang.core.optimizer.costs.LoadEstimator

nullCardinalityReplacement, UNSPECIFIED_NUM_SLOTS

Constructor Summary

Constructors

Constructor	Description
DynamicLoadEstimator(DynamicLoadEstimator.SinglePointEstimator singlePointEstimator, Function<Individual,String> specificationBuilder, Collection<Variable> employedVariables)	Creates a new instance.
DynamicLoadEstimator(DynamicLoadEstimator.SinglePointEstimator singlePointEstimator, Function<Individual,String> specificationBuilder, Variable... employedVariables)	Creates a new instance.

Method Summary

Modifier and Type	Method	Description
LoadEstimate	calculate(EstimationContext context)	Calculate the LoadEstimate.
static DynamicLoadEstimator	createFor(String templateKey, String resource, String expression, OptimizationSpace optimizationSpace)	Parses a mathematical expression and provides it as a LoadEstimator.SinglePointEstimationFunction.
Collection<Variable>	getEmployedVariables()	Get the Variables used in this instance.
String	toMathEx(Individual individual)	Creates a MathEx expression reflecting this instance under the configuration specified by an Individual.

Methods inherited from class org.apache.wayang.core.optimizer.costs.LoadEstimator

calculateJointProbability, createFallback, enumerateCombinations, replaceNullCardinality

Methods inherited from class java.lang.Object

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

Field Details

zeroLoad

public static DynamicLoadEstimator zeroLoad

Instance that always estimates a load of 0.

Constructor Details

DynamicLoadEstimator

public DynamicLoadEstimator(DynamicLoadEstimator.SinglePointEstimator singlePointEstimator,
 Function<Individual,String> specificationBuilder,
 Variable... employedVariables)

Creates a new instance.

Parameters:

singlePointEstimator - the DynamicLoadEstimator.SinglePointEstimator to use

specificationBuilder - creates a MathEx specification for the new instance with the parameters from an Individual

employedVariables - the Variables appearing in the singlePointEstimator

DynamicLoadEstimator

public DynamicLoadEstimator(DynamicLoadEstimator.SinglePointEstimator singlePointEstimator,
 Function<Individual,String> specificationBuilder,
 Collection<Variable> employedVariables)

Creates a new instance.

Parameters:

singlePointEstimator - the DynamicLoadEstimator.SinglePointEstimator to use

employedVariables - the Variables appearing in the singlePointEstimator

Method Details

createFor

public static DynamicLoadEstimator createFor(String templateKey,
 String resource,
 String expression,
 OptimizationSpace optimizationSpace)

Parses a mathematical expression and provides it as a LoadEstimator.SinglePointEstimationFunction.

Parameters:

templateKey - of the expression

resource - that is being estimated

expression - a mathematical expression

optimizationSpace - in which new Variables should be created

Returns:

the LoadEstimator.SinglePointEstimationFunction

calculate

public LoadEstimate calculate(EstimationContext context)

Description copied from class: LoadEstimator

Calculate the LoadEstimate.

Specified by:

calculate in class LoadEstimator

Parameters:

context - within that the LoadEstimate should be calculated

Returns:

the LoadEstimate

toMathEx

public String toMathEx(Individual individual)

Creates a MathEx expression reflecting this instance under the configuration specified by an Individual.

Parameters:

individual - specifies values of the employed Variables

Returns:

the MathEx expression

getEmployedVariables

public Collection<Variable> getEmployedVariables()

Get the Variables used in this instance.

Returns:

the Variables