| Package | Description |
|---|---|
| org.apache.hadoop.fs.impl |
This package contains implementation classes for use inside
filesystems.
|
| org.apache.hadoop.ipc |
Tools to help define network clients and servers.
|
| org.apache.hadoop.metrics2 |
Metrics 2.0
|
| org.apache.hadoop.metrics2.impl |
A metrics system implementation
|
| org.apache.hadoop.metrics2.lib |
A collection of library classes for implementing metrics sources
|
| org.apache.hadoop.metrics2.source |
| Modifier and Type | Class | Description |
|---|---|---|
class |
WeakRefMetricsSource |
A weak referenced metrics source which avoids hanging on to large objects
if somehow they don't get fully closed/cleaned up.
|
| Modifier and Type | Method | Description |
|---|---|---|
MetricsSource |
WeakRefMetricsSource.getSource() |
Get the source, will be null if the reference has been GC'd
|
| Constructor | Description |
|---|---|
WeakRefMetricsSource(java.lang.String name,
MetricsSource source) |
Constructor.
|
| Modifier and Type | Class | Description |
|---|---|---|
class |
DecayRpcScheduler |
The decay RPC scheduler tracks the cost of incoming requests in a map, then
decays the costs at a fixed time interval.
|
static class |
DecayRpcScheduler.MetricsProxy |
MetricsProxy is a singleton because we may init multiple schedulers and we
want to clean up resources when a new scheduler replaces the old one.
|
| Modifier and Type | Method | Description |
|---|---|---|
abstract MetricsSource |
MetricsSystem.getSource(java.lang.String name) |
| Modifier and Type | Class | Description |
|---|---|---|
class |
MetricsSystemImpl |
A base class for metrics system singletons
|
| Modifier and Type | Method | Description |
|---|---|---|
MetricsSource |
MetricsSystemImpl.getSource(java.lang.String name) |
| Modifier and Type | Method | Description |
|---|---|---|
MetricsSource |
MetricsSourceBuilder.build() |
|
static MetricsSource |
MetricsAnnotations.makeSource(java.lang.Object source) |
Make an metrics source from an annotated object.
|
| Modifier and Type | Class | Description |
|---|---|---|
class |
JvmMetrics |
JVM and logging related metrics.
|
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