Package org.apache.hadoop.yarn.api.resource

Class PlacementConstraint

java.lang.Object

org.apache.hadoop.yarn.api.resource.PlacementConstraint

@Public
@Unstable
public class PlacementConstraint
extends Object

PlacementConstraint represents a placement constraint for a resource allocation.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PlacementConstraint.AbstractConstraint	Abstract class that acts as the superclass of all placement constraint classes.
static class	PlacementConstraint.And	Class that represents a composite constraint that is a conjunction of other constraints.
static class	PlacementConstraint.CardinalityConstraint	Class that represents a cardinality constraint.
static class	PlacementConstraint.CompositeConstraint<R extends PlacementConstraint.Visitable>	Class that represents composite constraints, which comprise other constraints, forming a constraint tree.
static class	PlacementConstraint.DelayedOr	Class that represents a composite constraint that comprises a list of timed placement constraints (see PlacementConstraint.TimedPlacementConstraint).
static class	PlacementConstraint.Or	Class that represents a composite constraint that is a disjunction of other constraints.
static class	PlacementConstraint.SingleConstraint	Consider a set of nodes N that belongs to the scope specified in the constraint.
static class	PlacementConstraint.TargetConstraint	Class that represents a target constraint.
static class	PlacementConstraint.TargetExpression	Class representing the target expressions that are used in placement constraints.
static class	PlacementConstraint.TimedPlacementConstraint	Represents a timed placement constraint that has to be satisfied within a time window.
static interface	PlacementConstraint.Visitable	Interface used to enable the elements of the constraint tree to be visited.
static interface	PlacementConstraint.Visitor<T>	Visitor API for a constraint tree.

Constructor Summary

Constructors

Constructor	Description
PlacementConstraint(PlacementConstraint.AbstractConstraint constraintExpr)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
PlacementConstraint.AbstractConstraint	getConstraintExpr()	Get the constraint expression of the placement constraint.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

PlacementConstraint

public PlacementConstraint(PlacementConstraint.AbstractConstraint constraintExpr)

Method Details

toString

public String toString()

Overrides:

toString in class Object

getConstraintExpr

public PlacementConstraint.AbstractConstraint getConstraintExpr()

Get the constraint expression of the placement constraint.

Returns:

the constraint expression

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object