Method and apparatus for an object-oriented object for retrieving information from local and remote databases

• US 6,016,496 A
• Filed: 11/20/1997
• Issued: 01/18/2000
• Est. Priority Date: 11/20/1997
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Roberson, Kenneth Wayne
• Primary Examiner(s): HOMERE, JEAN RAYMOND
• Application Number:
  US08/974,837
• Time in Patent Office: 789 Days
• Field of Search: 707/10, 707/102, 707/103, 395/200.31, 395/200.47, 395/200.53, 395/200.33, 395/200.49, 395/200.58, 395/683
• US Class Current: 1/1
• CPC Class Codes: G06F 16/252 between a Database Management System and a front-end application
• CPC Class Codes: Y10S 707/99943 Generating database or data structure, e.g. via user interface
• CPC Class Codes: Y10S 707/99944 Object-oriented database structure

Abstract

A method and apparatus for creating an object-oriented object with the ability to retrieve database type information from either a local source, or a remote source across an Internet connection via TCP/IP without the knowledge of the invoking object. The object is instanced with a well defined interface containing only primitives. All messages sent to and replies from the object are broken into primitives. The object works normally for local request. However, for request to use a server, the object utilizes a private method to open a connection with the remote server and transmit relevant instance information. The server then creates the requested object locally on the server and invokes the desired method(s). Responses to the method(s) are sent back to the client'"'"'s private method, which formats the data, and hands it to the calling method.

Claims

1. A method, implemented in a computer system, for creating an object-oriented object for retrieving information from a local and remote source, comprising the steps of:

creating said object in said computer system at a client having an interface instanced with primitives;

sending messages by an application to said object at said client in said computer system using said primitives, said application having a class utilizing said object to retrieve said information;

identifying a first request by said object at said client for said information on said local source on said computer at said client and continuing a normal sequence of operations at said client for said information in said computer system for standalone operation; and

identifying a second request by said object at said client for said information on said remote source on said computer on a server and initiating communications with said server on said remote source to satisfy said second request.

2. The method of claim 1 wherein said step of identifying a second request by said object for said remote source further comprises:

detecting a remote flag by said object at said client and opening a connection with said remote source at said server using a private method of said object in said computer.

3. The method of claim 2 wherein said step of opening a connection further comprises:

transmitting instance information by said client to said remote source from said object.

4. The method of claim 2 wherein said step of opening a connection further comprises:

creating a target object on said remote source as a local object; and

invoking a desired method on said target object to retrieve said information.

5. The method of claim 4 wherein said step of invoking a desired method further comprises:

transmitting the information from said target object to said object on said computer.

6. The apparatus for creating an object-oriented object for retrieving information from a local and remote source, comprising:

means for creating said object in said computer system at a client having an interface instanced with primitives;

means for sending messages by an application to said object in said computer system using said primitives, said application having a class utilizing said object to retrieve said information;

means for identifying a first request by said object at said client for said information on said local source on said computer at said client and continuing a normal sequence of operations at said client for said information in said computer system for standalone operation; and

means for identifying a second request by said object at said client for said information on said remote source on said computer on a server and initiating communications with said server on said remote source to satisfy said second request.

7. The apparatus of claim 6 wherein said means for identifying a second request by said object for said remote source further comprises:

means for detecting a remote flag by said object at said client and opening a connection with said remote source at said server using a private method of said object in said computer.

8. The apparatus of claim 6 wherein said means for opening a connection further comprises:

means for transmitting instance information by said client to said remote source from said object.

9. The apparatus of claim 6 wherein said means for opening a connection further comprises:

means for creating a target object on said remote source as a local object; and

means for invoking a desired method on said target object to retrieve said information.

10. The apparatus of claim 9 wherein said means for invoking a desired method further comprises:

means for transmitting the information from said target object to said object on said computer.

11. A computer program product having a computer readable medium having computer program logic recorded thereon for creating an object-oriented object for retrieving information from a local and remote source, comprising:

computer readable means for creating said object in said computer system at a client having an interface instanced with primitives;

computer readable means for sending messages by an application to said object at said client in said computer system using said primitives, said application having a class utilizing said object to retrieve said information;

computer readable means for identifying a first request by said object at said client for said information on said local source on said computer at said client and continuing a normal sequence of operations at said client for said information in said computer system for standalone operation; and

computer readable means for identifying a second request by said object at said client for said information on said remote source on said computer on a server and initiating communications with said server on said remote source to satisfy said second request.

12. A computer program product of claim 11 wherein said computer readable means for identifying a second request by said object for said remote source further comprises:

computer readable means for detecting a remote flag by said object at said client and opening a connection with said remote source at said server using a private method of said object in said computer.

13. A computer program product of claim 11 wherein said computer readable means for opening a connection further comprises:

computer readable means for transmitting instance information by said client to said remote source from said object.

14. A computer program product of claim 11 wherein said computer readable means for opening a connection further comprises:

computer readable means for creating a target object on said remote source as a local object; and

computer readable means for invoking a desired method on said target object to retrieve said information.

15. A computer program product of claim 14 wherein said computer readable means for invoking a desired method further comprises:

computer readable means for transmitting the information from said target object to said object on said computer.