org.tentackle.persist

Interface IdSource

All Known Implementing Classes:

AbstractIdSource, ObjectId, ObjectSequenceId

public interface IdSource

Source of ID numbers.

Id sources are unique instances per Db. For example, by default there is one ObjectId instance per Db. However, implementations _may_ be able to be shared among Dbs, so it's up to the implementation whether it tolerates different Dbs or not.

Author:

harald

Method Summary

Modifier and Type	Method and Description
boolean	isLockFree() Returns whether retrieving an id is a lock-free operation.
long	nextId(Db db) Get the next unique ID.

Method Detail

nextId

long nextId(Db db)

Get the next unique ID.

Parameters:

db - the current db connection to be checked against getDb()

Returns:

a free ID.

isLockFree

boolean isLockFree()

Returns whether retrieving an id is a lock-free operation.

Returns:

true if lockfree