Package io.airlift.stats

Class CounterStat

java.lang.Object

io.airlift.stats.CounterStat

@ThreadSafe
public final class CounterStat
extends Object

Event statistics.

Thread-safety: instances of CounterStat are thread-safe. However, there is no consistency guarantee when using reset() or resetTo(io.airlift.stats.CounterStat) concurrently with update(long) or merge(io.airlift.stats.CounterStat).

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	CounterStat.CounterStatSnapshot

Constructor Summary

Constructors

Constructor	Description
CounterStat()

Method Summary

Modifier and Type	Method	Description
DecayCounter	getFifteenMinute()
DecayCounter	getFiveMinute()
DecayCounter	getOneMinute()
long	getTotalCount()
void	merge(CounterStat counterStat)
void	reset()	Resets counters.
void	resetTo(CounterStat counterStat)	Deprecated.
CounterStat.CounterStatSnapshot	snapshot()
void	update(long count)

Methods inherited from class java.lang.Object

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

Constructor Details

CounterStat

public CounterStat()

Method Details

update

public void update(long count)

merge

public void merge(CounterStat counterStat)

reset

public void reset()

Resets counters.

Note: this method is guaranteed to obliterate effect of previous update(long) or merge(io.airlift.stats.CounterStat) invocations. When it invoked concurrently with update(long) or merge(io.airlift.stats.CounterStat), the result is indeterminate.

resetTo

@Deprecated
public void resetTo(CounterStat counterStat)

Deprecated.

This is a hack to work around limitations in Jmxutils.

getTotalCount

public long getTotalCount()

getOneMinute

public DecayCounter getOneMinute()

getFiveMinute

public DecayCounter getFiveMinute()

getFifteenMinute

public DecayCounter getFifteenMinute()

snapshot

public CounterStat.CounterStatSnapshot snapshot()