Package org.apache.hadoop.yarn.util.constraint

Class PlacementConstraintParser.SourceTags

java.lang.Object

org.apache.hadoop.yarn.util.constraint.PlacementConstraintParser.SourceTags

Enclosing class:

PlacementConstraintParser

public static final class PlacementConstraintParser.SourceTags
extends Object

A helper class to encapsulate source tags and allocations in the placement specification.

Method Summary

Modifier and Type	Method	Description
static PlacementConstraintParser.SourceTags	emptySourceTags()
int	getNumOfAllocations()
String	getTag()
boolean	isEmpty()
static PlacementConstraintParser.SourceTags	parseFrom(String expr)	Parses source tags from expression "sourceTags(numOfAllocations)".

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

emptySourceTags

public static PlacementConstraintParser.SourceTags emptySourceTags()

isEmpty

public boolean isEmpty()

getTag

public String getTag()

getNumOfAllocations

public int getNumOfAllocations()

parseFrom

public static PlacementConstraintParser.SourceTags parseFrom(String expr)
                                                      throws PlacementConstraintParseException

Parses source tags from expression "sourceTags(numOfAllocations)".

Parameters:

expr - expression string.

Returns:

source tags, see PlacementConstraintParser.SourceTags

Throws:

PlacementConstraintParseException - when the placement constraint parser fails to parse an expression.