System, method, and article of manufacture for adding transactional recovery to a binary class in an object oriented system

• US 5,878,428 A
• Filed: 11/20/1995
• Issued: 03/02/1999
• Est. Priority Date: 11/20/1995
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Copeland, George Prentice, Holdsworth, Simon Antony James, Smith, Stanley Alan
• Primary Examiner(s): Black, Thomas G.
• Assistant Examiner(s): Coby, Frantz
• Application Number:
  US08/559,856
• Time in Patent Office: 1,198 Days
• Field of Search: 395/614, 395/609, 395/182.18, 395/700, 395/182.13, 395/601, 395/13, 707/204, 707/103, 707/202, 364/200
• US Class Current: 1/1
• CPC Class Codes: G06F 16/289 Object oriented databases
• CPC Class Codes: Y10S 707/99944 Object-oriented database structure
• CPC Class Codes: Y10S 707/99953 Recoverability

Abstract

A system, method and article of manufacture for automatically inserting transactional recoverability object service in binary classes in an information handling system employing object oriented technology, includes the steps of recognizing a constraint indicating that an object is not recoverable and generating a recoverable version of the object. One alternative for generating a recoverable version of the object includes the step of saving a first state of the object in a stream before execution of any method which might change the state of the object. Another alternative for the generating step includes the steps of creating a persistence synchronous class object, registering the persistence synchronous class object, and executing the persistence synchronous class object.

Claims

1. A method, in an information handling system comprising the steps of:

testing a constraint indicating whether or not an object in an object oriented programming system is recoverable; and

generating automatically a recoverable version of the object if said object is not recoverable, by adding a "before" method to each method of said object, said "before" method causing invocation of recoverable object services.

2. The method according to claim 1, wherein said recoverable object services include the step of:

saving a first state of the object in a stream before execution of any method which might change the state of the object.

3. The method according to claim 2, wherein said recoverable object services further comprises the step of:

executing an abort operation which streams the first state of the object into the object to recover the first state.

4. The method according to claim 2, wherein said recoverable object services further comprises the step of:

saving a plurality of instances of the first state of the object in one or more streams before execution of any method which might change the state of the object.

5. The method according to claim 2, wherein said recoverable object services further comprises the steps of:

executing a stream resource object;

executing a recoverable by stream object; and

executing a recoverable object class on the object.

6. The method according to claim 1, wherein said recoverable object services further comprises the step of:

executing a recoverable metaclass object.

7. The method according to claim 1, wherein said recoverable object services include the steps of:

creating a persistence synchronous class object;

registering the persistence synchronous class object; and

executing the persistence synchronous class object.

8. The method according to claim 7, wherein said creating step further comprises the steps of:

overriding a before and after method of a parent class; and

executing an initialize method on a recoverable by persistence object.

9. A system, in an information handling system comprising:

means for testing a constraint indicating whether or not an object in an object oriented programming system is recoverable; and

means for generating automatically a recoverable version of the object if said object is not recoverable, by adding a "before" method to each method of said object, said "before" method causing invocation of recoverable object services.

10. The system according to claim 9, wherein said recoverable object services includes further comprising:

means for saving a first state of the object in a stream before execution of any method which might change the state of the object.

11. The system according to claim 10, said recoverable object services further comprising:

means for executing an abort operation which streams the first state of the object into the object to recover the first state.

12. The system according to claim 10, said recoverable object services further comprising:

means for saving a plurality of instances of the first state of the object in one or more streams before execution of any method which might change the state of the object.

13. The system according to claim 10, said recoverable object services further comprising:

means for executing a stream resource object;

means for executing a recoverable by stream object; and

means for executing a recoverable object class on the object.

14. The system according to claim 9, said recoverable object services further comprising:

means for executing a recoverable metaclass object.

15. The system according to claim 9, wherein the recoverable object services further comprises:

means for creating a persistence synchronous class object;

means for registering the persistence synchronous class object; and

means for executing the persistence synchronous class object.

16. The system according to claim 15, wherein said means for creating further comprises:

means for overriding a before and after method of a parent class; and

means for executing an initialize method on a recoverable by persistence object.

17. A computer readable medium in an information handling system having program logic recorded thereon for causing said information handling system to generate a recoverable object the computer readable medium comprising:

computer readable program logic means for testing a constraint indicating whether or not an object in an object oriented programming system is recoverable; and

computer readable program logic means for generating automatically a recoverable version of the object if said object is not recoverable, by adding a "before" method to each method of said object, said "before" method causing invocation of recoverable object services.

18. The computer readable medium, according to claim 17, wherein said recoverable object services includes:

computer readable program logic means for saving a first state of the object in a stream before execution of any method which might change the state of the object.

19. The computer readable medium, according to claim 17, said recoverable object services further comprising:

computer readable program logic means for executing an abort operation which streams the first state of the object into the object to recover the first state.

20. The computer readable medium, according to claim 17, said recoverable object services further comprising:

computer readable program logic means for creating a persistence synchronous class object;

computer readable program logic means for registering the persistence synchronous class object; and

computer readable program logic means for executing the persistence synchronous class object.