org.apache.hadoop.hbase.metrics

Interface BaseSource

All Known Subinterfaces:

MetricsAssignmentManagerSource, MetricsBalancerSource, MetricsEditsReplaySource, MetricsHBaseServerSource, MetricsMasterFileSystemSource, MetricsMasterSource, MetricsRegionAggregateSource, MetricsRegionServerSource, MetricsReplicationSource, MetricsRESTSource, MetricsSnapshotSource, MetricsThriftServerSource, MetricsWALSource

public interface BaseSource

BaseSource for dynamic metrics to announce to Metrics2. In hbase-hadoop{1|2}-compat there is an implementation of this interface.

Field Summary

Fields

Modifier and Type	Field and Description
static String	HBASE_METRICS_SYSTEM_NAME

Method Summary

Methods

Modifier and Type	Method and Description
void	decGauge(String gaugeName, long delta) Subtract some amount from a gauge.
String	getMetricsContext() Get the metrics context.
String	getMetricsDescription() Get the description of what this source exposes.
String	getMetricsJmxContext() Get the name of the context in JMX that this source will be exposed through.
String	getMetricsName() Get the name of the metrics that are being exported by this source.
void	incCounters(String counterName, long delta) Add some amount to a counter.
void	incGauge(String gaugeName, long delta) Add some amount to a gauge.
void	init() Clear out the metrics and re-prepare the source.
void	removeMetric(String key) Remove a metric and no longer announce it.
void	setGauge(String gaugeName, long value) Set a gauge to a specific value.
void	updateHistogram(String name, long value) Add some value to a histogram.
void	updateQuantile(String name, long value) Add some value to a Quantile (An accurate histogram).

Field Detail

HBASE_METRICS_SYSTEM_NAME

static final String HBASE_METRICS_SYSTEM_NAME

See Also:

Constant Field Values

Method Detail

init

void init()

Clear out the metrics and re-prepare the source.

setGauge

void setGauge(String gaugeName,
            long value)

Set a gauge to a specific value.

Parameters:

gaugeName - the name of the gauge

value - the value

incGauge

void incGauge(String gaugeName,
            long delta)

Add some amount to a gauge.

Parameters:

gaugeName - the name of the gauge

delta - the amount to change the gauge by.

decGauge

void decGauge(String gaugeName,
            long delta)

Subtract some amount from a gauge.

Parameters:

gaugeName - the name of the gauge

delta - the amount to change the gauge by.

removeMetric

void removeMetric(String key)

Remove a metric and no longer announce it.

Parameters:

key - Name of the gauge to remove.

incCounters

void incCounters(String counterName,
               long delta)

Add some amount to a counter.

Parameters:

counterName - the name of the counter

delta - the amount to change the counter by.

updateHistogram

void updateHistogram(String name,
                   long value)

Add some value to a histogram.

Parameters:

name - the name of the histogram

value - the value to add to the histogram

updateQuantile

void updateQuantile(String name,
                  long value)

Add some value to a Quantile (An accurate histogram).

Parameters:

name - the name of the quantile

value - the value to add to the quantile

getMetricsContext

String getMetricsContext()

Get the metrics context. For hadoop metrics2 system this is usually an all lowercased string. eg. regionserver, master, thriftserver

Returns:

The string context used to register this source to hadoop's metrics2 system.

getMetricsDescription

String getMetricsDescription()

Get the description of what this source exposes.

getMetricsJmxContext

String getMetricsJmxContext()

Get the name of the context in JMX that this source will be exposed through. This is in ObjectName format. With the default context being Hadoop -> HBase

getMetricsName

String getMetricsName()

Get the name of the metrics that are being exported by this source. Eg. IPC, GC, WAL