10.3.4. Object construction and destruction

Allows the creation of new objects, which have no prior state.

Allows the creation of new objects, which have no prior state. The ObjectType parameter denotes whether an object is recoverable, recoverable and persistent (indicated by ANDPERSISTENT) or neither (NEITHER). If an object is marked as being persistent, its state is stored in one of the object stores. The shared parameter only has meaning if the object is RECOVERABLE.; If attr is not null and the object model is SINGLE (the default behavior), then the recoverable state of the object is maintained within the object itself. Otherwise, the state of the object is stored in an in-memory object store between atomic actions.

Constructors for new persistent objects should make use of atomic actions within themselves. This will ensure that the state of the object is automatically written to the object store either when the action in the constructor commits, or, if an enclosing action exists, when the appropriate top-level action commits.

Allows access to the existing persistent object named in the objUid parameter. The object's prior state, which is identified by the value of the objUid parameter), is loaded from an object store automatically.

Allows access to the existing persistent object named in the objUid parameter. The object's prior state, which is identified by the value of the objUid, is loaded from an object store automatically. If the attr parameter is not null, and the object model is SINGLE (the default behaviour), then the object is not reactivated at the start of each top-level transaction.