| Interface | Description | 
|---|---|
| Metric | 
 Handler for manipulating one user-defined metric. 
 | 
| Class | Description | 
|---|---|
| JobMetrics | 
 An immutable collection of job-specific metrics, pairs of metric names
 and sets of associated  
Measurements. | 
| Measurement | 
 Immutable data class containing information about one metric measurement,
 consisting of:
 
 metric value
 metric timestamp, generated when the metric was gathered
 metric descriptor (set of tag name-value pairs) 
  
 | 
| MeasurementPredicates | 
 Static utility class for creating various  
Measurement filtering
 predicates. | 
| MetricNames | 
 Each metric provided by Jet has a specific name which conceptually
 identifies what it's being used to measure. 
 | 
| Metrics | 
 Utility class for obtaining handlers to user-defined metrics. 
 | 
| MetricsDataSerializerHook | 
 A Java Service Provider hook for Hazelcast's Identified Data Serializable
 mechanism. 
 | 
| MetricTags | 
 Metric descriptors are formed from a comma separated list of  
tag_name=tag_value pairs. | 
| Enum | Description | 
|---|---|
| Unit | 
 Measurement unit of user-defined metrics (see  
Metric). | 
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