Updating a deferred copy of a data message

• US 20050138635A1
• Filed: 08/24/2004
• Published: 06/23/2005
• Est. Priority Date: 12/17/2003
• Status: Abandoned Application

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Baldwin, Timothy J., Auerbach, Joshua S., Paice, Susan P.
• Application Number:
  US10/925,060
• Publication Number:
  US 20050138635A1
• Time in Patent Office: Days
• US Class Current: 719/315
• CPC Class Codes: G06F 16/23 Updating

Abstract

A method for generating a copy of a first message in a messaging system, wherein the first message includes a nested data item comprising data items, the method comprising the steps of: creating a second message as a deferred copy of the first message; responsive to a determination that one of said data items addressed at the second message location is to be updated, creating an actual copy of the updated data item in the second message.

Claims

1. A method for generating a copy of a first message in a messaging system, wherein the first message includes a nested data item comprising data items, the method comprising the steps of:

creating a second message as a deferred copy of the first message;

in response to a determination that one of said data items addressed at the second message location is to be updated, creating an actual copy of the updated data item in the second message.

2. The method of claim 1 wherein the creating of an actual copy of the updated data item step further comprises creating an actual copy of a parent data item of the updated data item.

3. The method of claim 2 wherein the creating of an actual copy of the updated data item step further comprises creating a deferred copy of a child data item of the parent data item.

4. The method of claim 1 wherein the second message includes references to the nested data item.

5. The method of claim 4 wherein the references to the nested data item are memory pointers.

6. An apparatus for generating a copy of a first message in a messaging system, wherein the first message includes a nested data item comprising data items, the apparatus comprising:

means for creating a second message as a deferred copy of the first message;

means for, responsive to a determination that one of said data items addressed at the second message location is to be updated, creating an actual copy of the data item in the second message.

7. The apparatus of claim 6 wherein the means for creating an actual copy of the updated data item step further comprises means for creating an actual copy of a parent data item of the updated data item.

8. The apparatus of claim 7 wherein the means for creating an actual copy of the updated data item step further comprises means for creating a deferred copy of a child data item of the parent data item.

9. The apparatus of claim 6 wherein the second message includes references to the nested data item.

10. The apparatus of claim 9 wherein the references to the nested data item are memory pointers.

11. A computer program product comprising computer program code stored on a computer readable storage medium that, when executed on a data processing system, instructs the data processing system to carry out a method for generating a copy of a first message in a messaging system, wherein the first message includes a nested data item comprising data items, the method comprising the steps of:

creating a second message as a deferred copy of the first message;

in response to a determination that one of said data items addressed at the second message location is to be updated, creating an actual copy of the updated data item in the second message.