Package org.btrplace.model.constraint

Class Fence

java.lang.Object

org.btrplace.model.constraint.SimpleConstraint

org.btrplace.model.constraint.Fence

All Implemented Interfaces:

Constraint, SatConstraint

@SideConstraint(args={"v : vms","ns <: nodes"},
                inv="vmState(v) = running --> host(v) : ns")
public class Fence
extends SimpleConstraint

A constraint to force the given VM, when running, to be hosted on a given group of nodes.

Author:

Fabien Hermenier

Constructor Summary

Constructors

Constructor	Description
Fence(VM vm, Collection<Node> nodes)	Make a new discrete constraint.
Fence(VM vm, Collection<Node> nodes, boolean continuous)	Make a new constraint.
Fence(VM vm, Node... n)	Make a new discrete constraint.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
FenceChecker	getChecker()	Get the validator used to check if a plan satisfies the constraint.
Collection<Node>	getInvolvedNodes()	Get the nodes involved in the constraint.
Collection<VM>	getInvolvedVMs()	Get the VMs involved in the constraint.
int	hashCode()
static List<Fence>	newFence(Collection<VM> vms, Collection<Node> nodes)	Instantiate discrete constraints for a collection of VMs.
String	toString()

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

isContinuous, setContinuous

Methods inherited from class java.lang.Object

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

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

isSatisfied, isSatisfied

Constructor Details

Fence

public Fence(VM vm, Collection<Node> nodes)

Make a new discrete constraint.

Parameters:

vm - the involved VM

nodes - the involved nodes

Fence

public Fence(VM vm, Node... n)

Make a new discrete constraint.

Parameters:

vm - the involved VM

n - the involved nodes

Fence

public Fence(VM vm, Collection<Node> nodes, boolean continuous)

Make a new constraint.

Parameters:

vm - the VM identifiers

nodes - the nodes identifiers

continuous - true for a continuous constraint.

Method Details

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getChecker

public FenceChecker getChecker()

Description copied from interface: SatConstraint

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

Returns:

a non-null SatConstraintChecker

getInvolvedNodes

public Collection<Node> getInvolvedNodes()

Description copied from interface: SatConstraint

Get the nodes involved in the constraint.

Returns:

a set of nodes identifiers that may be empty

getInvolvedVMs

public Collection<VM> getInvolvedVMs()

Description copied from interface: SatConstraint

Get the VMs involved in the constraint.

Returns:

a set of VM identifiers that may be empty

newFence

public static List<Fence> newFence(Collection<VM> vms, Collection<Node> nodes)

Instantiate discrete constraints for a collection of VMs.

Parameters:

vms - the VMs to integrate

nodes - the hosts to disallow

Returns:

the associated list of constraints