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

Class PlacementConstraint.CardinalityConstraint

java.lang.Object

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

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

All Implemented Interfaces:

PlacementConstraint.Visitable

Enclosing class:

PlacementConstraint

public static class PlacementConstraint.CardinalityConstraint
extends PlacementConstraint.AbstractConstraint

Class that represents a cardinality constraint. Such a constraint allows the number of allocations with a specific set of tags and within a given scope to be between some minimum and maximum values. It is a specialized version of the PlacementConstraint.SingleConstraint, where the target is a set of allocation tags.

Constructor Summary

Constructors

Constructor	Description
CardinalityConstraint(String scope, int minCardinality, int maxCardinality, Set<String> allocationTags)

Method Summary

Modifier and Type	Method	Description
<T> T	accept(PlacementConstraint.Visitor<T> visitor)	Visitor pattern.
boolean	equals(Object o)
Set<String>	getAllocationTags()	Get the allocation tags of the constraint.
int	getMaxCardinality()	Get the maximum cardinality of the constraint.
int	getMinCardinality()	Get the minimum cardinality of the constraint.
String	getScope()	Get the scope of the constraint.
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 Details

CardinalityConstraint

public CardinalityConstraint(String scope,
 int minCardinality,
 int maxCardinality,
 Set<String> allocationTags)

Method Details

getScope

public String getScope()

Get the scope of the constraint.

Returns:

the scope of the constraint

getMinCardinality

public int getMinCardinality()

Get the minimum cardinality of the constraint.

Returns:

the minimum cardinality of the constraint

getMaxCardinality

public int getMaxCardinality()

Get the maximum cardinality of the constraint.

Returns:

the maximum cardinality of the constraint

getAllocationTags

public Set<String> getAllocationTags()

Get the allocation tags of the constraint.

Returns:

the allocation tags of the constraint

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.

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