Package dev.restate.sdk

Class RestateRandom

java.lang.Object

java.util.Random

dev.restate.sdk.RestateRandom

All Implemented Interfaces:

Serializable, RandomGenerator

public class RestateRandom
extends Random

Subclass of Random inherently predictable, seeded on the InvocationId, which is not secret.

This instance is useful to generate identifiers, idempotency keys, and for uniform sampling from a set of options. If a cryptographically secure value is needed, please generate that externally using Context.run(Serde, ThrowingSupplier).

You MUST NOT use this object inside a Context.run(Serde, ThrowingSupplier).

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.random.RandomGenerator

RandomGenerator.ArbitrarilyJumpableGenerator, RandomGenerator.JumpableGenerator, RandomGenerator.LeapableGenerator, RandomGenerator.SplittableGenerator, RandomGenerator.StreamableGenerator

Method Summary

Modifier and Type	Method	Description
protected int	next(int bits)
UUID	nextUUID()
void	setSeed(long seed)

Methods inherited from class java.util.Random

doubles, doubles, doubles, doubles, from, ints, ints, ints, ints, longs, longs, longs, longs, nextBoolean, nextBytes, nextDouble, nextFloat, nextGaussian, nextInt, nextInt, nextLong

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.random.RandomGenerator

isDeprecated, nextDouble, nextDouble, nextExponential, nextFloat, nextFloat, nextGaussian, nextInt, nextLong, nextLong

Method Details

setSeed

public void setSeed(long seed)

Overrides:

setSeed in class Random

Throws:

UnsupportedOperationException - You cannot set the seed on RestateRandom

nextUUID

public UUID nextUUID()

Returns:

a UUID generated using this RNG that is stable across retries and replays.

next

protected int next(int bits)

Overrides:

next in class Random