Package org.apache.lucene.store

Class RateLimiter.SimpleRateLimiter

java.lang.Object

org.apache.lucene.store.RateLimiter

org.apache.lucene.store.RateLimiter.SimpleRateLimiter

Enclosing class:

RateLimiter

public static class RateLimiter.SimpleRateLimiter
extends RateLimiter

Simple class to rate limit IO.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.store.RateLimiter

RateLimiter.SimpleRateLimiter

Constructor Summary

Constructors

Constructor	Description
SimpleRateLimiter(double mbPerSec)	mbPerSec is the MB/sec max IO rate

Method Summary

Modifier and Type	Method	Description
double	getMbPerSec()	The current mb per second rate limit.
long	pause(long bytes)	Pauses, if necessary, to keep the instantaneous IO rate at or below the target.
void	setMbPerSec(double mbPerSec)	Sets an updated mb per second rate limit.

Methods inherited from class java.lang.Object

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

Constructor Details

SimpleRateLimiter

public SimpleRateLimiter(double mbPerSec)

mbPerSec is the MB/sec max IO rate

Method Details

setMbPerSec

public void setMbPerSec(double mbPerSec)

Sets an updated mb per second rate limit.

Specified by:

setMbPerSec in class RateLimiter

getMbPerSec

public double getMbPerSec()

The current mb per second rate limit.

Specified by:

getMbPerSec in class RateLimiter

pause

public long pause(long bytes)

Pauses, if necessary, to keep the instantaneous IO rate at or below the target. NOTE: multiple threads may safely use this, however the implementation is not perfectly thread safe but likely in practice this is harmless (just means in some rare cases the rate might exceed the target). It's best to call this with a biggish count, not one byte at a time.

Specified by:

pause in class RateLimiter

Returns:

the pause time in nano seconds