org.btrplace.model.constraint

Class Preserve

java.lang.Object

org.btrplace.model.constraint.SatConstraint

org.btrplace.model.constraint.Preserve

All Implemented Interfaces:

Constraint

public class Preserve
extends SatConstraint

Ensure the allocation of a given minimum amount of resources for the given VM. If it is not running, the constraint ignores it. The amount to allocate must be specified as a minimum or an exact value. At most, the VM will have an allocation of resources equals to the maximum allowed

The restriction provided by the constraint is discrete.

Author:

Fabien Hermenier

Constructor Summary

Constructors

Constructor and Description
Preserve(VM vm, String r, int q) Make a new constraint.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
int	getAmount() Get the amount of resources.
SatConstraintChecker<Preserve>	getChecker() Get the validator used to check if a plan satisfies the constraint.
String	getResource() Get the resource identifier.
int	hashCode()
static List<Preserve>	newPreserve(Collection<VM> vms, String r, int q) Make multiple constraints
boolean	setContinuous(boolean b) Indicates if the restriction provided by the constraint is continuous.
String	toString()

Methods inherited from class org.btrplace.model.constraint.SatConstraint

getInvolvedNodes, getInvolvedVMs, isContinuous, isSatisfied, isSatisfied, restrictionToString

Methods inherited from class java.lang.Object

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

Constructor Detail

Preserve

public Preserve(VM vm,
                String r,
                int q)

Make a new constraint.

Parameters:

vm - the VM

r - the resource identifier

q - the minimum amount of resources to allocate to each VM. >= 0

Method Detail

newPreserve

public static List<Preserve> newPreserve(Collection<VM> vms,
                                         String r,
                                         int q)

Make multiple constraints

Parameters:

vms - the VMs involved in the constraints

r - the resource identifier

q - the the minimum amount of resources to allocate to each VM. >= 0

Returns:

a list of constraints

getResource

public String getResource()

Get the resource identifier.

Returns:

the identifier

getAmount

public int getAmount()

Get the amount of resources.

Returns:

a positive integer

equals

public boolean equals(Object o)

Overrides:

equals in class SatConstraint

hashCode

public int hashCode()

Overrides:

hashCode in class SatConstraint

toString

public String toString()

Overrides:

toString in class Object

setContinuous

public boolean setContinuous(boolean b)

Description copied from class: SatConstraint

Indicates if the restriction provided by the constraint is continuous.

Overrides:

setContinuous in class SatConstraint

Parameters:

b - true to ask for a continuous satisfaction, false for a discrete satisfaction.

Returns:

true iff the parameter has been considered

getChecker

public SatConstraintChecker<Preserve> getChecker()

Description copied from class: SatConstraint

Get the validator used to check if a plan satisfies the constraint.

Overrides:

getChecker in class SatConstraint

Returns:

a non-null SatConstraintChecker