org.apache.hadoop.hbase.regionserver

Class MetricsTableAggregateSourceImpl

java.lang.Object

org.apache.hadoop.hbase.metrics.BaseSourceImpl

org.apache.hadoop.hbase.regionserver.MetricsTableAggregateSourceImpl

All Implemented Interfaces:

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

@InterfaceAudience.Private
public class MetricsTableAggregateSourceImpl
extends BaseSourceImpl
implements MetricsTableAggregateSource

Field Summary

Fields

Modifier and Type	Field and Description
private static org.slf4j.Logger	LOG
private ConcurrentHashMap<String,MetricsTableSource>	tableSources

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.MetricsTableAggregateSource

METRICS_CONTEXT, METRICS_DESCRIPTION, METRICS_JMX_CONTEXT, METRICS_NAME, NUM_TABLES, NUMBER_OF_TABLES_DESC

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

HBASE_METRICS_SYSTEM_NAME

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
void	deregister(String table) Remove a table'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(String table, MetricsTableSource source) Register a MetricsTableSource 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

tableSources

private ConcurrentHashMap<String,MetricsTableSource> tableSources

Constructor Detail

MetricsTableAggregateSourceImpl

public MetricsTableAggregateSourceImpl()

MetricsTableAggregateSourceImpl

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

Method Detail

register

public void register(String table,
                     MetricsTableSource source)

Description copied from interface: MetricsTableAggregateSource

Register a MetricsTableSource as being open.

Specified by:

register in interface MetricsTableAggregateSource

Parameters:

table - The table name

source - the source for the table being opened.

deregister

public void deregister(String table)

Description copied from interface: MetricsTableAggregateSource

Remove a table's source. This is called when regions of a table are closed.

Specified by:

deregister in interface MetricsTableAggregateSource

Parameters:

table - The table name

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.