Method and apparatus for activating and executing remote objects

• US 5,613,148 A
• Filed: 10/19/1995
• Issued: 03/18/1997
• Est. Priority Date: 06/14/1993
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Greene, Kevin J., Smith, Marc G., Shepler, Erin E., Bezviner, Dawn E., Danforth, Scott, Conner, Michael H.
• Primary Examiner(s): Geckil, Mehmet B.
• Application Number:
  US08/545,369
• Time in Patent Office: 516 Days
• Field of Search: 395/800, 395/650, 395/700, 395/600
• US Class Current: 709/203
• CPC Class Codes: G06F 9/465 Distributed object oriented systems remote method invocation [RMI] G06F9/548
• CPC Class Codes: G06F 9/547 Remote procedure calls [RPC]; Web services

Abstract

A method for activating and executing objects containing data and procedures including the steps of relaying, by a first object in a first address space, a communication from a process in a second address space to a second object in the first address space, activating, by the second object, a third object containing data and procedures in response to the relayed communication, and executing, by the activated third object, an operation in response to the relayed communication. In addition, an apparatus for activating and executing remote objects containing data and procedures including a first object in a first address space for relaying a communication from a process in a second address space to a second object in the first address space, apparatus for activating, in the second object, a third object containing data and procedures in response to the relayed communication, and apparatus for executing, in the activated third object, an operation in response to the relayed communication.

Claims

1. A method for activating and executing objects containing data and procedures in a computer system, wherein said objects exist in an object oriented environment, comprising the steps of:

determining by a process in a second address space that a target object is not available in the second address space;

generating by said process a call to a manager object in said second address space to locate the target object in a first address space;

locating by said manager object a second object in the first address space for said target object and creating a proxy server object in the second address space for said second object;

automatically relaying, by a first object in the first address space in said object-oriented environment, a communication from the process in the second address space to said second object in the first address space;

automatically activating, by the second object in said object oriented environment, a third object in the first address space containing data and procedures in response to the relayed communication from the process in said second address space; and

automatically executing, by the activated third object in said object oriented environment, an operation in response to the relayed communication from the process in said second address space.

2. The method of claim 1 wherein the step of relaying includes relaying a communication across a network from the process through a proxy server object located on a remote host system.

3. The method of claim 1 further comprising a step of subclassing said second object to modify the activation and calling processes of said proxy server object.

4. The method of claim 1 further comprising a step of returning results of the executed operation to the second object.

5. The method of claim 4 further comprising a step of relaying, by said first object, the returned results from the second object to the process.

6. The method of claim 1 wherein the step of locating includes the step of querying an implementation repository for a class in said target object.

7. The method of claim 1 wherein the step of locating further comprises the steps of:

querying said process to determine if the proxy server object already exist in the process;

using said proxy server object that already exist in the process; and

building in the process the proxy server object associated with a server containing the target object when said proxy server object does not exist.

8. An apparatus for activating and executing remote objects in an object oriented environment containing data and procedures in a computer system comprising:

means for determining by a process in a second address space that a target object is not available in the second address space;

means for generating by said process a call to a manager object in said second address space to locate the target object in a first address space;

means for locating by said manager object a second object in the first address space for said target object and creating a proxy server object in the second address space for said second object;

a first object in the first address space in said object oriented environment for automatically relaying a communication from the process in the second address space to the second object in the first address space;

means for automatically activating, in the second object, a third object in said object oriented environment containing data and procedures in response to the relayed communication; and

means for automatically executing, in the activated third object, an operation in response to the relayed communication.

9. The apparatus of claim 8 wherein the first object includes means for relaying a communication across a network from the process through the proxy server object located on a remote host system.

10. The apparatus of claim 8 further comprising means for subclassing said second object to modify the activation and calling processes of said proxy server object.

11. The apparatus of claim 8 further comprising means for returning results of the executed operation to the second object.

12. The apparatus of claim 11 further comprising means for said first object to relay the returned results from the second object to the process.

13. A data processing system for activating and executing remote objects in an object oriented environment containing data and procedures comprising:

means for determining by a .process in a second address space that a target object is not available in the second address space;

means for generating by said process a call to a manager object in said second address space to locate the target object in a first address space;

means for locating by said manager object a second object in the first address space for said target object and creating a proxy server object in the second address space for said second object;

means for storing data to be processed;

means for processing data;

a first object in the first address space in said object oriented environment for automatically relaying a communication from the process in the second address space in said object oriented environment to the second object in the first address space;

means for automatically activating, in the second object, a third object containing data and procedures in said object oriented environment in response to the relayed communication; and

means for automatically executing, in the activated third object, an operation in response to the relayed communication.

14. The data processing system of claim 13 wherein the first object includes means for relaying a communication across a network from the process through the proxy server object located on a remote host system.

15. The data processing system of claim 13 further comprising means for subclassing said second object to modify the activation and calling processes of said proxy server object.

16. The data processing system of claim 13 further comprising means for returning results of the executed operation to the second object.

17. The data processing system of claim 16 further comprising means for said first object to relay the returned results from the second object to the process.

18. A computer program product stored in computer memory executable by a processor in a computer system for activating and executing remote objects containing data and procedures in an object oriented environment comprising:

means for determining by a process in a second address space that a target object is not available in the second address space;

means for generating by said process a call to a manager object in said second address space to locate the target object in a first address space;

means for locating by said manager object a second object in the first address space for said target object and creating a proxy server object in the second address space for said second object;

a first object in the first address space in said object oriented environment of said computer system for automatically relaying a communication from the process in the second address space of said computer system to the second object in the first address space;

means for automatically activating, in the second object, a third object containing data and procedures in said object oriented environment in response to the relayed communication; and

means for automatically executing, in the activated third object, an operation in response to the relayed communication.

19. The computer program product of claim 18 wherein the first object includes means for relaying a communication across a network from the process through the proxy server object located on a remote host system.

20. The computer program product of claim 18 further comprising means for subclassing said second object to modify the activation and calling processes of said proxy server object.

21. The computer program product of claim 18 further comprising means for returning results of the executed operation to the second object.

22. The computer program product of claim 21 further comprising means for said first object to relay the returned results from the second object to the process.