com.numericalmethod.suanshu.stats.random.concurrent

Class ConcurrentCachedRVG

java.lang.Object

com.numericalmethod.suanshu.stats.random.concurrent.ConcurrentCachedRVG

All Implemented Interfaces:

RandomVectorGenerator, java.io.Serializable

public class ConcurrentCachedRVG
extends java.lang.Object
implements RandomVectorGenerator

This is a fast thread-safe wrapper for random vector generators. This class is backed by ConcurrentCachedGenerator.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ConcurrentCachedRVG(RandomVectorGenerator rvg) Constructs a new instance which wraps the given random vector generator and uses a cache which has 8 entries per available core.
ConcurrentCachedRVG(RandomVectorGenerator rvg, int cacheSize) Constructs a new instance which wraps the given random vector generator and uses a cache of the specified size.

Method Summary

Modifier and Type	Method and Description
double[]	nextVector() Get the next random vector.
void	seed(long... seeds) Delegate to the underlying random vector generator.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConcurrentCachedRVG

public ConcurrentCachedRVG(RandomVectorGenerator rvg,
                           int cacheSize)

Constructs a new instance which wraps the given random vector generator and uses a cache of the specified size. A larger cache will make the simulation slightly faster at the expense of increased memory usage, but can lead to the computation of unnecessary values at the tail.

Parameters:

rvg - the underlying generator

cacheSize - the cache size

See Also:

ConcurrentCachedGenerator.ConcurrentCachedGenerator(com.numericalmethod.suanshu.stats.random.concurrent.ConcurrentCachedGenerator.Generator, int)

ConcurrentCachedRVG

public ConcurrentCachedRVG(RandomVectorGenerator rvg)

Constructs a new instance which wraps the given random vector generator and uses a cache which has 8 entries per available core.

Parameters:

rvg - the underlying generator

Method Detail

nextVector

public double[] nextVector()

Description copied from interface: RandomVectorGenerator

Get the next random vector.

Specified by:

nextVector in interface RandomVectorGenerator

Returns:

the next random vector

seed

public void seed(long... seeds)

Delegate to the underlying random vector generator. Note: this method is NOT thread-safe.

Specified by:

seed in interface RandomVectorGenerator

Parameters:

seeds - the seeds