Class IdGenerators.SimpleIncrementingIdGenerator

java.lang.Object

org.springframework.integration.support.IdGenerators.SimpleIncrementingIdGenerator

All Implemented Interfaces:

IdGenerator

Enclosing class:

IdGenerators

public static class IdGenerators.SimpleIncrementingIdGenerator
extends Object
implements IdGenerator

Based on the two AtomicLongs, for topBits and bottomBits, respectively. Begins with {0, 1}; incremented on each use.

Note: after each 2^63 generations, a duplicate UUID can be returned in a multi-threaded environment, if a second thread sees the old topBits before it is incremented by the thread detecting the bottomBits roll over. The duplicate would be from around the previous rollover and the chance of such a value still being in the system is exceedingly small. If your system might be impacted by this situation, you should choose another IdGenerator. Also note that there is no persistence, so this generator starts at {0, 1} each time the system is initialized. Therefore, it is not suitable when persisting messages based on their ID; it should only be used when the absolute best performance is required and messages are not persisted.

Since:

4.0

Author:

Andy Wilkinson, Gary Russell

Constructor Summary

Constructors

Constructor	Description
SimpleIncrementingIdGenerator()

Method Summary

Modifier and Type	Method	Description
UUID	generateId()

Methods inherited from class java.lang.Object

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

Constructor Details

SimpleIncrementingIdGenerator

public SimpleIncrementingIdGenerator()

Method Details

generateId

public UUID generateId()

Specified by:

generateId in interface IdGenerator