Package com.mapr.org.apache.hadoop.metrics.util

Class MetricsLongValue

java.lang.Object

com.mapr.org.apache.hadoop.metrics.util.MetricsBase

com.mapr.org.apache.hadoop.metrics.util.MetricsLongValue

Direct Known Subclasses:

MetricsIncLongValue

@LimitedPrivate({"HDFS","MapReduce"})
public class MetricsLongValue
extends MetricsBase

The MetricsLongValue class is for a metric that is not time varied but changes only when it is set. Each time its value is set, it is published only *once* at the next update call.

Field Summary

Fields inherited from class com.mapr.org.apache.hadoop.metrics.util.MetricsBase

NO_DESCRIPTION

Constructor Summary

Constructors

Constructor	Description
MetricsLongValue(String nam, MetricsRegistry registry)	Constructor - create a new metric
MetricsLongValue(String nam, MetricsRegistry registry, String description)	Constructor - create a new metric

Method Summary

Modifier and Type	Method	Description
long	get()	Get value
void	pushMetric(MetricsRecord mr)	Push the metric to the mr.
void	set(long newValue)	Set the value

Methods inherited from class com.mapr.org.apache.hadoop.metrics.util.MetricsBase

getDescription, getName

Methods inherited from class java.lang.Object

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

Constructor Details

MetricsLongValue

public MetricsLongValue(String nam,
 MetricsRegistry registry,
 String description)

Constructor - create a new metric

Parameters:

nam - the name of the metrics to be used to publish the metric

registry - - where the metrics object will be registered

MetricsLongValue

public MetricsLongValue(String nam,
 MetricsRegistry registry)

Constructor - create a new metric

Parameters:

nam - the name of the metrics to be used to publish the metric

registry - - where the metrics object will be registered A description of MetricsBase.NO_DESCRIPTION is used

Method Details

set

public void set(long newValue)

Set the value

Parameters:

newValue -

get

public long get()

Get value

Returns:

the value last set

pushMetric

public void pushMetric(MetricsRecord mr)

Push the metric to the mr. The metric is pushed only if it was updated since last push Note this does NOT push to JMX (JMX gets the info via get()

Specified by:

pushMetric in class MetricsBase

Parameters:

mr -