org.apache.hadoop.yarn.api.resource

Class PlacementConstraint.TargetConstraint

java.lang.Object

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

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

All Implemented Interfaces:

PlacementConstraint.Visitable

Enclosing class:

PlacementConstraint

public static class PlacementConstraint.TargetConstraint
extends PlacementConstraint.AbstractConstraint

Class that represents a target constraint. Such a constraint requires an allocation to be placed within a scope that satisfies some specified expressions on node attributes and allocation tags. It is a specialized version of the PlacementConstraint.SingleConstraint, where the minimum and the maximum cardinalities take specific values based on the TargetOperator used.

Constructor Summary

Constructors

Constructor and Description
TargetConstraint(org.apache.hadoop.yarn.api.resource.PlacementConstraint.TargetConstraint.TargetOperator op, String scope, Set<PlacementConstraint.TargetExpression> targetExpressions)

Method Summary

Modifier and Type	Method and Description
<T> T	accept(PlacementConstraint.Visitor<T> visitor) Visitor pattern.
boolean	equals(Object o)
org.apache.hadoop.yarn.api.resource.PlacementConstraint.TargetConstraint.TargetOperator	getOp() Get the target operator of the constraint.
String	getScope() Get the scope of the constraint.
Set<PlacementConstraint.TargetExpression>	getTargetExpressions() Get the set of target expressions.
int	hashCode()
String	toString()

Methods inherited from class org.apache.hadoop.yarn.api.resource.PlacementConstraint.AbstractConstraint

build

Methods inherited from class java.lang.Object

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

Constructor Detail

TargetConstraint

public TargetConstraint(org.apache.hadoop.yarn.api.resource.PlacementConstraint.TargetConstraint.TargetOperator op,
                        String scope,
                        Set<PlacementConstraint.TargetExpression> targetExpressions)

Method Detail

getOp

public org.apache.hadoop.yarn.api.resource.PlacementConstraint.TargetConstraint.TargetOperator getOp()

Get the target operator of the constraint.

Returns:

the target operator

getScope

public String getScope()

Get the scope of the constraint.

Returns:

the scope of the constraint

getTargetExpressions

public Set<PlacementConstraint.TargetExpression> getTargetExpressions()

Get the set of target expressions.

Returns:

the set of target expressions

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class PlacementConstraint.AbstractConstraint

accept

public <T> T accept(PlacementConstraint.Visitor<T> visitor)

Description copied from interface: PlacementConstraint.Visitable

Visitor pattern.

Type Parameters:

T - defines the type that the visitor will use and the return type of the accept.

Parameters:

visitor - visitor to be used

Returns:

the result of visiting a given object.