Method and system for controlling access to objects in a data pr

Details Method and system for controlling access to objects in a data pr Method and system for controlling access to objects in a data pr

1993-09-24

1995-11-28

Kriess, Kevin A.

Boots, shoes, and leggings

364963, 3649692, 364DIG2, 395490, 395159, 395160, G06F 1200

Patent

active

054716195

ABSTRACT:
A method and system are provided for controlling the access to objects in an object oriented data processing application, where the objects are being hierarchically structured and either locally available or retrievable from an external unit. Each object has a dependent object counter which indicates the existence or the number of dependent objects associated with that object. When at least one dependent object is not locally available, a dummy object is appended to that object, enabling the object expansion even if the dependent objects of the selected object are not yet locally available in local memory. The objects to be retrieved from the external unit are locked from user access, while access is allowed to the locally available dependent objects.

REFERENCES:
C. Neusius, "Adapting Synchronization Counters to the Requirements of Inheritance", OOPS Messenger, vol. 3, No. 1, Jan. 1992, pp. 39-44.
Eliot et al, "Working with Persistent Objects: To Swizzle or not to Swizzle", IEEE Transactions on Software Engineering, vol. 18, No. 8, Aug. 1992, pp. 657-673.
Decouchant et al, "A Synchronization mechanism for an Object Oriented Distributed System", 11th Int. Conf. on Distributed Computing Systems, May 20, 1991, pp. 152-159.
Chen et al, "Linking Consistancy With Object/Thread Semantics: An Approach to Robust Computation", 9th Int. Conf. on Distributed Computing Systems, Jun. 5, 1989, pp. 121-128.

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