me.ahoo.cosid.uncertainty

Class UncertaintyIdGenerator

java.lang.Object

me.ahoo.cosid.uncertainty.UncertaintyIdGenerator

All Implemented Interfaces:

IdGenerator, IdGeneratorDecorator, StringIdGenerator

@Beta
public class UncertaintyIdGenerator
extends java.lang.Object
implements IdGeneratorDecorator

Uncertainty ID Generator. For the following usage scenarios:

     1. The problem of uneven sharding of snowflake IDs.
     2. I don’t want the generated ID to be predictable, such as preventing crawler by ID number, predicting transaction volume.
 

Field Summary

Fields

Modifier and Type	Field and Description
protected IdGenerator	actual

Constructor Summary

Constructors

Constructor and Description
UncertaintyIdGenerator(IdGenerator actual, int uncertaintyBits)

Method Summary

Modifier and Type	Method and Description
long	generate() Generate distributed ID.
IdGenerator	getActual() Get decorator actual id generator.
long	maxOriginalId()
int	originalIdBits()
int	uncertaintyBits()
long	uncertaintyBound()

Methods inherited from class java.lang.Object

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

Methods inherited from interface me.ahoo.cosid.IdGeneratorDecorator

getActual

Methods inherited from interface me.ahoo.cosid.IdGenerator

generateAsString, idConverter

Field Detail

actual

protected final IdGenerator actual

Constructor Detail

UncertaintyIdGenerator

public UncertaintyIdGenerator(IdGenerator actual,
                              int uncertaintyBits)

Method Detail

uncertaintyBits

public int uncertaintyBits()

originalIdBits

public int originalIdBits()

uncertaintyBound

public long uncertaintyBound()

maxOriginalId

public long maxOriginalId()

getActual

public IdGenerator getActual()

Description copied from interface: IdGeneratorDecorator

Get decorator actual id generator.

Specified by:

getActual in interface IdGeneratorDecorator

Returns:

actual id generator

generate

public long generate()

Description copied from interface: IdGenerator

Generate distributed ID.

Specified by:

generate in interface IdGenerator

Specified by:

generate in interface IdGeneratorDecorator

Returns:

generated distributed ID