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:

BaseSource, MetricsRegionAggregateSource, org.apache.hadoop.metrics2.MetricsSource

@InterfaceAudience.Private
public class MetricsRegionAggregateSourceImpl
extends BaseSourceImpl
implements MetricsRegionAggregateSource

Field Summary

Fields

Modifier and Type	Field and Description
private MetricsExecutorImpl	executor
private static org.slf4j.Logger	LOG
private Set<MetricsRegionSource>	regionSources

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
private void	clearCache()
void	deregister(MetricsRegionSource toRemove) Remove a region's source.
void	getMetrics(org.apache.hadoop.metrics2.MetricsCollector collector, boolean all) Yes this is a get function that doesn't return anything.
void	register(MetricsRegionSource source) Register a MetricsRegionSource as being open.

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

Field Detail

LOG

private static final org.slf4j.Logger LOG

executor

private final MetricsExecutorImpl executor

regionSources

private final Set<MetricsRegionSource> regionSources

Constructor Detail

MetricsRegionAggregateSourceImpl

public MetricsRegionAggregateSourceImpl()

MetricsRegionAggregateSourceImpl

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

Method Detail

register

public void register(MetricsRegionSource source)

Description copied from interface: MetricsRegionAggregateSource

Register a MetricsRegionSource as being open.

Specified by:

register in interface MetricsRegionAggregateSource

Parameters:

source - the source for the region being opened.

deregister

public void deregister(MetricsRegionSource toRemove)

Description copied from interface: MetricsRegionAggregateSource

Remove a region's source. This is called when a region is closed.

Specified by:

deregister in interface MetricsRegionAggregateSource

Parameters:

toRemove - The region to remove.

clearCache

private void clearCache()

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.