org.apache.hadoop.hbase.coprocessor

Class MetaTableMetrics

java.lang.Object

org.apache.hadoop.hbase.coprocessor.MetaTableMetrics

All Implemented Interfaces:

Coprocessor, RegionCoprocessor

@InterfaceAudience.Private
public class MetaTableMetrics
extends Object
implements RegionCoprocessor

A coprocessor that collects metrics from meta table.

These metrics will be available through the regular Hadoop metrics2 sinks (ganglia, opentsdb, etc) as well as JMX output.

See Also:

MetaTableMetrics

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
(package private) class	MetaTableMetrics.ExampleRegionObserverMeta
(package private) static class	MetaTableMetrics.MetaTableOps

Nested classes/interfaces inherited from interface org.apache.hadoop.hbase.Coprocessor

Coprocessor.State

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	active
private LossyCounting	clientMetricsLossyCounting
private MetaTableMetrics.ExampleRegionObserverMeta	observer
private org.apache.hbase.thirdparty.com.google.common.collect.ImmutableMap<Class,MetaTableMetrics.MetaTableOps>	opsNameMap
private RegionCoprocessorEnvironment	regionCoprocessorEnv
private Map<String,Optional<Metric>>	requestsMap

Fields inherited from interface org.apache.hadoop.hbase.Coprocessor

PRIORITY_HIGHEST, PRIORITY_LOWEST, PRIORITY_SYSTEM, PRIORITY_USER, VERSION

Constructor Summary

Constructors

Constructor and Description
MetaTableMetrics()

Method Summary

Modifier and Type	Method and Description
Optional<RegionObserver>	getRegionObserver()
void	start(CoprocessorEnvironment env) Called by the CoprocessorEnvironment during it's own startup to initialize the coprocessor.
void	stop(CoprocessorEnvironment env) Called by the CoprocessorEnvironment during it's own shutdown to stop the coprocessor.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.hbase.coprocessor.RegionCoprocessor

getBulkLoadObserver, getEndpointObserver

Methods inherited from interface org.apache.hadoop.hbase.Coprocessor

getServices

Field Detail

observer

private MetaTableMetrics.ExampleRegionObserverMeta observer

requestsMap

private Map<String,Optional<Metric>> requestsMap

regionCoprocessorEnv

private RegionCoprocessorEnvironment regionCoprocessorEnv

clientMetricsLossyCounting

private LossyCounting clientMetricsLossyCounting

active

private boolean active

opsNameMap

private org.apache.hbase.thirdparty.com.google.common.collect.ImmutableMap<Class,MetaTableMetrics.MetaTableOps> opsNameMap

Constructor Detail

MetaTableMetrics

public MetaTableMetrics()

Method Detail

getRegionObserver

public Optional<RegionObserver> getRegionObserver()

Specified by:

getRegionObserver in interface RegionCoprocessor

start

public void start(CoprocessorEnvironment env)
           throws IOException

Description copied from interface: Coprocessor

Called by the CoprocessorEnvironment during it's own startup to initialize the coprocessor.

Specified by:

start in interface Coprocessor

Throws:

IOException

stop

public void stop(CoprocessorEnvironment env)
          throws IOException

Description copied from interface: Coprocessor

Called by the CoprocessorEnvironment during it's own shutdown to stop the coprocessor.

Specified by:

stop in interface Coprocessor

Throws:

IOException