org.jumpi.spi.component
Interface SequenceGenerator

All Superinterfaces:

Component, Configurable, Manageable

All Known Implementing Classes:

SequenceGeneratorImpl

public interface SequenceGenerator

extends Component

A SequenceGenerator provides a thread-safe, strictly increasing sequence number.

The sequence number starts at 0 and increases by one each time getNext() is called. The getNext method can be called simultaneously by multiple threads. Concurrent threads calling getNext may never receive the same sequence number.

The SequenceGenerator is a Jumpi component. The Component lifecycle is detailled in Manageable. A SequenceGenerator only provides sequence values during the active lifetime of the instance.

Method Summary

long	getNext() Get the next sequence number.

Methods inherited from interface org.jumpi.spi.Configurable

configure, getName

Methods inherited from interface org.jumpi.spi.Manageable

manage

Method Detail

getNext

public long getNext()

Get the next sequence number. The sequence numbering starts at 0 and increases by 1 each time getNext is called. Must be thread-safe.

Returns:

the next sequence number.

Throws:

java.lang.IllegalStateException - if not started.