Interest-based collaborative framework

• US 5,941,945 A
• Filed: 06/18/1997
• Issued: 08/24/1999
• Est. Priority Date: 06/18/1997
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Jain, Rajiv, Srinivasan, Muralidharan, Aditham, Radhakrishna
• Primary Examiner(s): Barry, Esq., Lance Leonard
• Application Number:
  US08/878,442
• Time in Patent Office: 797 Days
• Field of Search: 395/200.35, 395/200.57, 395/200.58, 395/200.59, 395/200.43, 395/683, 345/331, 345/332
• US Class Current: 709/205
• CPC Class Codes: G06F 2209/544 Remote
• CPC Class Codes: G06F 9/542 Event management; Broadcasting; Multicasting; Notifications
• CPC Class Codes: H04L 67/55 Push-based network services
• CPC Class Codes: H04L 67/563 Data redirection of data network streams
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]

Abstract

In a colloboration system which allows a plurality of programs to interact, each program registers an "interest" in messages with a session object. The session object, which represents the colloboration session and acts as a collaboration manager, receives all messages but broadcasts a received message only to those programs which have registered an interest in the message. In one embodiment, a colloborative application framework is used to build both the session object and the application programs. The framework includes class code information which is incorporated into each application program by subclassing and which allows each program to communicate with the session object through a predetermined protocol.

Claims

1. A method of communicating between a first program and a second program in a collaborative system having at least one computer with a memory, the method comprising the steps of:

A. using first predefined class code to construct a first session object in the memory, the first predefined class code having methods therein for receiving and transmitting messages with a predetermined message structure and for registering message interests from programs;

B. including second predefined class code in the first program and the second program when the first program and the second program are built, the predefined class code having methods for communicating with the first session object using the message structure;

C. using the second predefined class code in the first program to construct a first collaborator object, the first collaborator object transmitting a first message with the message structure to the first session object;

D. using the second predefined class code in the second program to construct a second collaborator object, the second collaborator object registering a message interest with the first session object; and

E. using a method in first predefined class code to transmit the second message with the message structure only to programs which have registered message interests.

2. The method as defined by claim 1 wherein each message contains a type and step D comprises the step of;

D1. registering a message interest, comprising a set of message types which the second program needs to receive, with the first session object.

3. The method as defined by claim 2 further including the steps of:

I. constructing a first agent object for transmitting the first message from the session object to the first program over a network; and

J. constructing a second agent object for transmitting the second message from the second program to the session object over the network.

4. The method as defined by claim 1 wherein the session object is constructed in a session object address space and the method further comprises the step of:

F. using a method in first predefined class code in response to the first message to construct a shared object in the session object address space during the session.

5. The method as defined in claim 4 wherein the shared object is constructed in response to a message received from the first program.

6. The method as defined in claim 4 further including the step of:

G. using a method in first predefined class code to transmit messages with the predetermined message structure from the shared object to the session object.

7. The method as defined by claim 6 further including the step of:

H. using a method in first predefined class code to register a message interest for the shared object with the session object.

8. An apparatus for communicating between a first program and a second program in a collaborative system having at least one computer with a memory, the apparatus comprising:

means for using first predefined class code to construct a first session object in the memory, the first predefined class code having methods therein for receiving and transmitting messages with a predetermined message structure and for registering message interests from programs;

second predefined class code in the first program and the second program, the predefined class code having methods for communicating with the first session object using the message structure;

means for using the second predefined class code in the first program to construct a first collaborator object, the first collaborator object transmitting a first message with the message structure to the first session object;

means for using the second predefined class code in the second program to construct a second collaborator object, the second collaborator object registering a message interest with the first session object; and

means for using a method in first predefined class code to transmit the second message with the message structure only to programs which have registered message interests.

9. The apparatus as defined by claim 8 wherein each message contains a type and the means for using the second predefined class code in the second program to construct a second collaborator object includes:

means for registering a message interest, comprising a set of message types which the second program needs to receive, with the first session object.

10. The apparatus as defined by claim 9 further including:

means for constructing a first agent object for transmitting the first message from the session object to the first program over a network; and

means for constructing a second agent object for transmitting the second message from the second program to the session object over the network.

11. The apparatus as defined by claim 8 wherein the session object is constructed in a session object address space and the apparatus further comprises:

means for using a method in first predefined class code in response to the first message to construct a shared object in the session object address space during the session.

12. The apparatus as defined in claim 11 wherein the shared object is constructed in response to a message received from the first program.

13. The apparatus as defined in claim 11 further including:

means for using a method in first predefined class code to transmit messages with the predetermined message structure from the shared object to the session object.

14. The apparatus as defined by claim 13 further including:

means for using a method in first predefined class code to register a message interest for the shared object with the session object.

15. A computer program product comprising:

a computer usable medium having computer readable program code thereon for communicating between a first program and a second program in a collaborative system having at least one computer with a memory, the computer readable program code comprising;

program code forusing first predefined class code to construct a first session object in the memory, the first predefined class code having methods therein for receiving and transmitting messages with a predetermined message structure and for registering message interests from programs;

second predefined class code in the first program and the second program, the predefined class code having methods for communicating with the first session object using the message structure;

program code for using the second predefined class code in the first program to construct a first collaborator object, the first collaborator object transmitting a first message with the message structure to the first session object;

program code for using the second predefined class code in the second program to construct a second collaborator object, the second collaborator object registering a message interest with the first session object; and

program code for using a method in first predefined class code to transmit the second message with the message structure only to programs which have registered message interests.

16. The computer program product as defined by claim 15 wherein each message contains a type and the program code for using the second predefined class code in the second program to construct a second collaborator object includes:

program code for registering a message interest, comprising a set of message types which the second program needs to receive, with the first session object.

17. The computer program product as defined by claim 16 further including:

program code for constructing a first agent object for transmitting the first message from the session object to the first program over a network; and

program code for constructing a second agent object for transmitting the second message from the second program to the session object over the network.

18. The computer program product as defined by claim 15 wherein the session object is constructed in a session object address space and the computer program product further comprises:

program code for using a method in first predefined class code in response to the first message to construct a shared object in the session object address space during the session.

19. The computer program product as defined in claim 15 wherein the shared object is constructed in response to a message received from the first program.

20. The computer program product as defined in claim 15 further including:

program code for using a method in first predefined class code to transmit messages with the predetermined message structure from the shared object to the session object.

21. The computer program product as defined by claim 20 further including:

program code for using a method in first predefined class code to register a message interest for the shared object with the session object.