org.apache.hadoop.hbase.regionserver

Class MetricsRegionAggregateSourceImpl

java.lang.Object

org.apache.hadoop.hbase.metrics.BaseSourceImpl

org.apache.hadoop.hbase.regionserver.MetricsRegionAggregateSourceImpl

All Implemented Interfaces:

org.apache.hadoop.hbase.metrics.BaseSource, org.apache.hadoop.hbase.regionserver.MetricsRegionAggregateSource, org.apache.hadoop.metrics2.MetricsSource

@InterfaceAudience.Private
public class MetricsRegionAggregateSourceImpl
extends BaseSourceImpl
implements org.apache.hadoop.hbase.regionserver.MetricsRegionAggregateSource

Field Summary

Fields inherited from class org.apache.hadoop.hbase.metrics.BaseSourceImpl

metricsAdapter, metricsContext, metricsDescription, metricsJmxContext, metricsName, metricsRegistry, registry

Fields inherited from interface org.apache.hadoop.hbase.regionserver.MetricsRegionAggregateSource

METRICS_CONTEXT, METRICS_DESCRIPTION, METRICS_JMX_CONTEXT, METRICS_NAME, NUMBER_OF_REGIONS_DESC

Fields inherited from interface org.apache.hadoop.hbase.metrics.BaseSource

HBASE_METRICS_SYSTEM_NAME

Constructor Summary

Constructors

Constructor and Description
MetricsRegionAggregateSourceImpl()
MetricsRegionAggregateSourceImpl(String metricsName, String metricsDescription, String metricsContext, String metricsJmxContext)

Method Summary

Modifier and Type	Method and Description
void	deregister(org.apache.hadoop.hbase.regionserver.MetricsRegionSource toRemove)
void	getMetrics(org.apache.hadoop.metrics2.MetricsCollector collector, boolean all) Yes this is a get function that doesn't return anything.
void	register(org.apache.hadoop.hbase.regionserver.MetricsRegionSource source)

Methods inherited from class org.apache.hadoop.hbase.metrics.BaseSourceImpl

decGauge, getMetricsContext, getMetricsDescription, getMetricsJmxContext, getMetricsName, getMetricsRegistry, incCounters, incGauge, init, removeMetric, setGauge, updateHistogram

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.metrics.BaseSource

decGauge, getMetricRegistryInfo, getMetricsContext, getMetricsDescription, getMetricsJmxContext, getMetricsName, incCounters, incGauge, init, removeMetric, setGauge, updateHistogram

Constructor Detail

MetricsRegionAggregateSourceImpl

public MetricsRegionAggregateSourceImpl()

MetricsRegionAggregateSourceImpl

public MetricsRegionAggregateSourceImpl(String metricsName,
                                        String metricsDescription,
                                        String metricsContext,
                                        String metricsJmxContext)

Method Detail

register

public void register(org.apache.hadoop.hbase.regionserver.MetricsRegionSource source)

Specified by:

register in interface org.apache.hadoop.hbase.regionserver.MetricsRegionAggregateSource

deregister

public void deregister(org.apache.hadoop.hbase.regionserver.MetricsRegionSource toRemove)

Specified by:

deregister in interface org.apache.hadoop.hbase.regionserver.MetricsRegionAggregateSource

getMetrics

public void getMetrics(org.apache.hadoop.metrics2.MetricsCollector collector,
                       boolean all)

Yes this is a get function that doesn't return anything. Thanks Hadoop for breaking all expectations of java programmers. Instead of returning anything Hadoop metrics expects getMetrics to push the metrics into the collector.

Specified by:

getMetrics in interface org.apache.hadoop.metrics2.MetricsSource

Overrides:

getMetrics in class BaseSourceImpl

Parameters:

collector - the collector

all - get all the metrics regardless of when they last changed.