org.drools.planner.core.termination
Class PhaseToSolverTerminationBridge

java.lang.Object
  org.drools.planner.core.termination.AbstractTermination
      org.drools.planner.core.termination.PhaseToSolverTerminationBridge

All Implemented Interfaces:

EventListener, SolverPhaseLifecycleListener, SolverLifecycleListener, Termination

public class PhaseToSolverTerminationBridge
extends AbstractTermination

Field Summary

Fields inherited from class org.drools.planner.core.termination.AbstractTermination

logger

Constructor Summary

PhaseToSolverTerminationBridge(Termination solverTermination)

Method Summary

double	calculatePhaseTimeGradient(AbstractSolverPhaseScope solverPhaseScope) See Termination.calculateSolverTimeGradient(DefaultSolverScope).
double	calculateSolverTimeGradient(DefaultSolverScope solverScope) A timeGradient is a relative estimate of how long the search will continue.
boolean	isPhaseTerminated(AbstractSolverPhaseScope solverPhaseScope) Called by the SolverPhase after every step to determine if the search should stop.
boolean	isSolverTerminated(DefaultSolverScope solverScope) Called by the Solver after every phase to determine if the search should stop.

Methods inherited from class org.drools.planner.core.termination.AbstractTermination

beforeDeciding, phaseEnded, phaseStarted, solvingEnded, solvingStarted, stepDecided, stepTaken

Methods inherited from class java.lang.Object

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

Constructor Detail

PhaseToSolverTerminationBridge

public PhaseToSolverTerminationBridge(Termination solverTermination)

Method Detail

isSolverTerminated

public boolean isSolverTerminated(DefaultSolverScope solverScope)

Description copied from interface: Termination

Called by the Solver after every phase to determine if the search should stop.

Parameters:

solverScope - never null

Returns:

true if the search should terminate.

isPhaseTerminated

public boolean isPhaseTerminated(AbstractSolverPhaseScope solverPhaseScope)

Description copied from interface: Termination

Called by the SolverPhase after every step to determine if the search should stop.

Parameters:

solverPhaseScope - never null

Returns:

true if the search should terminate.

calculateSolverTimeGradient

public double calculateSolverTimeGradient(DefaultSolverScope solverScope)

Description copied from interface: Termination

A timeGradient is a relative estimate of how long the search will continue.

Clients that use a timeGradient should cache it at the start of a single step because some implementations are not time-stable.

If a timeGradient can not be calculated, it should return -1.0. Several implementations (such a SimulatedAnnealingAcceptor) require a correctly implemented timeGradient.

A Termination's timeGradient can be requested after they are terminated, so implementations should be careful not to return a timeGradient above 1.0.

Parameters:

solverScope - never null

Returns:

timeGradient t for which 0.0 <= t <= 1.0 or -1.0 when it is not supported. At the start of a solver t is 0.0 and at the end t would be 1.0.

calculatePhaseTimeGradient

public double calculatePhaseTimeGradient(AbstractSolverPhaseScope solverPhaseScope)

Description copied from interface: Termination

See Termination.calculateSolverTimeGradient(DefaultSolverScope).

Parameters:

solverPhaseScope - never null

Returns:

timeGradient t for which 0.0 <= t <= 1.0 or -1.0 when it is not supported. At the start of a phase t is 0.0 and at the end t would be 1.0.