Class ObjectId

java.lang.Object

org.tentackle.dbms.AbstractIdSource

org.tentackle.dbms.ObjectId

All Implemented Interfaces:

IdSource

public class ObjectId
extends AbstractIdSource

An IdSource to create unique object IDs.

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

Author:

harald

See Also:

• ObjectSequenceId

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	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 AbstractIdSource

assertDbNotRemote, assertOneRowAffected, getName, toString

Methods inherited from class Object

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

Constructor Details

ObjectId

public ObjectId(String name)

Creates an object id.

Parameters:

name - the source and table name

Method Details

isLockFree

public boolean isLockFree()

Description copied from interface: IdSource

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

Returns:

true if lock-free

nextId

public long nextId(Db db)

Description copied from interface: IdSource

Get the next unique ID.

Parameters:

db - the current session

Returns:

a free ID.