org.tentackle.persist

Class ObjectId

java.lang.Object

org.tentackle.persist.AbstractIdSource

org.tentackle.persist.ObjectId

All Implemented Interfaces:

IdSource

public class ObjectId
extends AbstractIdSource

An IdSource to create unique object IDs.

Only used if backend does not support sequences.
Provides some degree of optimization to update the table only once at end of transaction.

Author:

harald

See Also:

ObjectSequenceId

Constructor Summary

Constructors

Constructor and Description
ObjectId(String name) Creates an object id.

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.

Methods inherited from class org.tentackle.persist.AbstractIdSource

assertDbNotRemote, assertOneRowAffected, getName, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectId

public ObjectId(String name)

Creates an object id.

Parameters:

name - the source and table name

Method Detail

isLockFree

public boolean isLockFree()

Description copied from interface: IdSource

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

Returns:

true if lockfree

nextId

public long nextId(Db db)

Description copied from interface: IdSource

Get the next unique ID.

Parameters:

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

Returns:

a free ID.