| Package | Description | 
|---|---|
| org.apache.hadoop.ipc | Tools to help define network clients and servers. | 
| org.apache.hadoop.metrics2 | Metrics 2.0 | 
| org.apache.hadoop.metrics2.filter | Builtin metrics filters (to be used in metrics config files) | 
| org.apache.hadoop.metrics2.lib | A collection of library classes for implementing metrics sources | 
| org.apache.hadoop.metrics2.sink | Builtin metrics sinks | 
| org.apache.hadoop.metrics2.sink.ganglia | |
| org.apache.hadoop.metrics2.util | General helpers for implementing source and sinks | 
| Class and Description | 
|---|
| MetricsCollector The metrics collector interface | 
| MetricsSource The metrics source interface | 
| Class and Description | 
|---|
| AbstractMetric The immutable metric | 
| MetricsCollector The metrics collector interface | 
| MetricsInfo Interface to provide immutable meta info for metrics | 
| MetricsPlugin The plugin interface for the metrics framework | 
| MetricsRecord An immutable snapshot of metrics with a timestamp | 
| MetricsRecordBuilder The metrics record builder interface | 
| MetricsSink The metrics sink interface. | 
| MetricsSystem.Callback The metrics system callback interface (needed for proxies.) | 
| MetricsSystemMXBean The JMX interface to the metrics system | 
| MetricsTag Immutable tag for metrics (for grouping on host/queue/username etc.) | 
| MetricStringBuilder Build a string dump of the metrics. | 
| MetricsVisitor A visitor interface for metrics | 
| MetricType | 
| Class and Description | 
|---|
| MetricsFilter The metrics filter interface | 
| MetricsPlugin The plugin interface for the metrics framework | 
| Class and Description | 
|---|
| MetricsInfo Interface to provide immutable meta info for metrics | 
| MetricsRecordBuilder The metrics record builder interface | 
| MetricsSystem The metrics system interface | 
| MetricsTag Immutable tag for metrics (for grouping on host/queue/username etc.) | 
| Class and Description | 
|---|
| MetricsPlugin The plugin interface for the metrics framework | 
| MetricsRecord An immutable snapshot of metrics with a timestamp | 
| MetricsSink The metrics sink interface. | 
| Class and Description | 
|---|
| MetricsPlugin The plugin interface for the metrics framework | 
| MetricsRecord An immutable snapshot of metrics with a timestamp | 
| MetricsSink The metrics sink interface. | 
| Class and Description | 
|---|
| AbstractMetric The immutable metric | 
| MetricsRecord An immutable snapshot of metrics with a timestamp | 
| MetricsTag Immutable tag for metrics (for grouping on host/queue/username etc.) | 
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