Package org.openspaces.admin.internal.statistics

Class LastStatisticsHolder<S>

java.lang.Object

org.openspaces.admin.internal.statistics.LastStatisticsHolder<S>

public class LastStatisticsHolder<S>
extends Object

Holds last statistics and encapsulates lock mechanism Created by moran on 12/9/17.

Since:

12.3

Constructor Summary

Constructors

Constructor	Description
LastStatisticsHolder()
LastStatisticsHolder(S lastStatistics)

Method Summary

Modifier and Type	Method	Description
boolean	acquireLastStatisticsLock()
S	getLastStatistics()
void	releaseLastStatisticsLock()	Releases the acquired lock and notifies any waiting parties
void	updateLastStatistics(S lastStatistics)	Updates with the last attempt for getting statistics.
boolean	validCache(long statisticsInterval)
void	waitForLastStatistics()	Waits until lock has been released

Methods inherited from class java.lang.Object

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

Constructor Details

LastStatisticsHolder

public LastStatisticsHolder()

LastStatisticsHolder

public LastStatisticsHolder(S lastStatistics)

Method Details

validCache

public boolean validCache(long statisticsInterval)

Returns:

true if time has *not* elapsed from last statistics cached sample (i.e. cache is valid).

acquireLastStatisticsLock

public boolean acquireLastStatisticsLock()

Returns:

true if acquired the lock; false if lock has already been acquired.

releaseLastStatisticsLock

public void releaseLastStatisticsLock()

Releases the acquired lock and notifies any waiting parties

See Also:

• waitForLastStatistics()

waitForLastStatistics

public void waitForLastStatistics()

Waits until lock has been released

updateLastStatistics

public void updateLastStatistics(S lastStatistics)

Updates with the last attempt for getting statistics. Timestamp should be updated, statistics only if not null.

Parameters:

lastStatistics - can be null.

getLastStatistics

public S getLastStatistics()