| Package | Description | 
|---|---|
| org.apache.hadoop.yarn.util.constraint | Package org.apache.hadoop.yarn.util.constraint contains classes
 which is used as utility class for placement constraints. | 
| Class and Description | 
|---|
| PlacementConstraintParseException Exception when the placement constraint parser fails to parse an expression. | 
| PlacementConstraintParser.ConstraintParser Constraint Parser used to parse placement constraints from a
 given expression. | 
| PlacementConstraintParser.ConstraintTokenizer Tokenizer interface that used to parse an expression. | 
| PlacementConstraintParser.SourceTags A helper class to encapsulate source tags and allocations in the
 placement specification. | 
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