org.apache.hadoop.metrics.util
Class MetricsLongValue

java.lang.Object
  org.apache.hadoop.metrics.util.MetricsLongValue

public class MetricsLongValue
extends Object

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.

Constructor Summary

MetricsLongValue(String nam)
Constructor - create a new metric

Method Summary

void	dec() Dec metrics by one
void	dec(long decr) Inc metrics for incr vlaue
long	get() Get value
void	inc() Inc metrics by one
void	inc(long incr) Inc metrics for incr vlaue
void	pushMetric(MetricsRecord mr) Push the metric to the mr.
void	set(long newValue) Set the value

Methods inherited from class java.lang.Object

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

Constructor Detail

MetricsLongValue

public MetricsLongValue(String nam)

Constructor - create a new metric

Parameters:

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

Method Detail

set

public void set(long newValue)

Set the value

Parameters:

newValue -

get

public long get()

Get value

Returns:

the value last set

inc

public void inc(long incr)

Inc metrics for incr vlaue

Parameters:

incr - - value to be added

inc

public void inc()

Inc metrics by one

dec

public void dec(long decr)

Inc metrics for incr vlaue

Parameters:

decr - - value to subtract

dec

public void dec()

Dec metrics by one

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()

Parameters:

mr -