Package org.btrplace.scheduler.choco.constraint.migration

Class CPrecedence

java.lang.Object

org.btrplace.scheduler.choco.constraint.migration.CPrecedence

All Implemented Interfaces:

ChocoConstraint, Injectable, MisplacedVMsEstimator

public class CPrecedence
extends Object
implements ChocoConstraint

Choco implementation of the Precedence constraint.

Author:

Vincent Kherbache

Constructor Summary

Constructors

Constructor	Description
CPrecedence(Precedence pr)	Make a new constraint.

Method Summary

Modifier and Type	Method	Description
Set<VM>	getMisPlacedVMs(Instance i)	Get the VMs that are supposed to be mis-placed.
boolean	inject(Parameters ps, ReconfigurationProblem rp)	Inject the constraint into the problem.

Methods inherited from class java.lang.Object

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

Constructor Details

CPrecedence

public CPrecedence(Precedence pr)

Make a new constraint.

Parameters:

pr - the Precedence constraint to rely on

Method Details

inject

public boolean inject(Parameters ps, ReconfigurationProblem rp) throws SchedulerException

Description copied from interface: Injectable

Inject the constraint into the problem.

Specified by:

inject in interface Injectable

Parameters:

ps - the scheduler parameters

rp - the problem

Returns:

true if the injection succeeded, false if the problem is sure to not have a solution

Throws:

SchedulerException - if an error occurred while injecting.

getMisPlacedVMs

public Set<VM> getMisPlacedVMs(Instance i)

Description copied from interface: MisplacedVMsEstimator

Get the VMs that are supposed to be mis-placed.

Specified by:

getMisPlacedVMs in interface MisplacedVMsEstimator

Parameters:

i - the instance to inspect

Returns:

a set of VMs identifier that may be empty (when no VMs are misplaced)