com.cloudera.oryx.common.random

Class RandomManager

java.lang.Object

com.cloudera.oryx.common.random.RandomManager

public final class RandomManager
extends Object

Manages random number generation. Allows resetting RNGs to a known state for testing.

Method Summary

Modifier and Type	Method and Description
static org.apache.commons.math3.random.RandomGenerator	getRandom()
static org.apache.commons.math3.random.RandomGenerator	getRandom(long seed)
static void	useTestSeed() Only call in test code. Causes all known instances of RandomGenerator, and future ones, to be started from a fixed seed.

Methods inherited from class java.lang.Object

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

Method Detail

getRandom

public static org.apache.commons.math3.random.RandomGenerator getRandom()

Returns:

a new, seeded RandomGenerator

getRandom

public static org.apache.commons.math3.random.RandomGenerator getRandom(long seed)

Parameters:

seed - explicit seed for random number generator

Returns:

a new, seeded RandomGenerator

useTestSeed

public static void useTestSeed()

Only call in test code. Causes all known instances of RandomGenerator, and future ones, to be started from a fixed seed. This is useful for making tests deterministic.