Package org.apache.cassandra.index.sai.utils

Class AtomicRatio

java.lang.Object

org.apache.cassandra.index.sai.utils.AtomicRatio

public class AtomicRatio
extends Object

AtomicRatio provides thread safe operations to maintain a AtomicRatio.Ratio of a numerator and denominator. The ratio can be updated atomically by multiple threads calling the update(long, long) method. The current ratio value can be retrieved via the get() method.

The class also provides a thread safe updateCount that maintains the number of times the AtomicRatio.Ratio has been updated. This can be used to determine whether the AtomicRatio.Ratio is useful based on the number of updates.

Constructor Summary

Constructors

Constructor	Description
AtomicRatio()

Method Summary

Modifier and Type	Method	Description
double	get()
int	getUpdateCount()
void	update(long numerator, long denominator)

Methods inherited from class java.lang.Object

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

Constructor Details

AtomicRatio

public AtomicRatio()

Method Details

update

public void update(long numerator,
 long denominator)

get

public double get()

getUpdateCount

public int getUpdateCount()