Package org.btrplace.model.constraint

Class Online

java.lang.Object

org.btrplace.model.constraint.SimpleConstraint

org.btrplace.model.constraint.Online

All Implemented Interfaces:

Constraint, SatConstraint

@SideConstraint(args="n : nodes",
                inv="$nodeState(n) = online")
public class Online
extends SimpleConstraint

A constraint to force a node at being online. The constraint is only discrete.

Author:

Fabien Hermenier

Constructor Summary

Constructors

Constructor	Description
Online(Node n)	Make a new constraint.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
OnlineChecker	getChecker()	Get the validator used to check if a plan satisfies the constraint.
Collection<Node>	getInvolvedNodes()	Get the nodes involved in the constraint.
int	hashCode()
static List<Online>	newOnline(Collection<Node> nodes)	Instantiate discrete constraints for a collection of nodes.
static List<Online>	newOnline(Node... nodes)	Instantiate discrete constraints for a collection of nodes.
boolean	setContinuous(boolean b)	Indicates if the restriction provided by the constraint is continuous.
String	toString()

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

isContinuous

Methods inherited from class java.lang.Object

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

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

getInvolvedVMs, isSatisfied, isSatisfied

Constructor Details

Online

public Online(Node n)

Make a new constraint.

Parameters:

n - the node to set online

Method Details

getChecker

public OnlineChecker getChecker()

Description copied from interface: SatConstraint

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

Returns:

a non-null SatConstraintChecker

toString

public String toString()

Overrides:

toString in class Object

setContinuous

public boolean setContinuous(boolean b)

Description copied from interface: SatConstraint

Indicates if the restriction provided by the constraint is continuous.

Specified by:

setContinuous in interface SatConstraint

Overrides:

setContinuous in class SimpleConstraint

Parameters:

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

Returns:

true iff the parameter has been considered

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

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

newOnline

public static List<Online> newOnline(Collection<Node> nodes)

Instantiate discrete constraints for a collection of nodes.

Parameters:

nodes - the nodes to integrate

Returns:

the associated list of constraints

newOnline

public static List<Online> newOnline(Node... nodes)

Instantiate discrete constraints for a collection of nodes.

Parameters:

nodes - the nodes to integrate

Returns:

the associated list of constraints