Methods and apparatus for remote method invocation

• US 6,487,607 B1
• Filed: 03/20/1998
• Issued: 11/26/2002
• Est. Priority Date: 02/26/1998
• Status: Expired due to Term

• Current Assignee: Oracle America, Inc. (Oracle Corporation)
• Original Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Inventors: Jones, Peter C., Wollrath, Ann M.
• Primary Examiner(s): Coulter, Kenneth R.
• Application Number:
  US09/044,938
• Time in Patent Office: 1,712 Days
• Field of Search: 709/320, 709/321, 709/322, 709/323, 709/327, 709/328, 709/330
• US Class Current: 719/330
• CPC Class Codes: G06F 16/289 Object oriented databases
• CPC Class Codes: G06F 9/52 Program synchronisation; Mutual exclusion, e.g. by means of semaphores
• CPC Class Codes: G06F 9/547 Remote procedure calls [RPC]; Web services
• CPC Class Codes: G06F 9/548 Object oriented; Remote method invocation [RMI] non-remote method invocation G06F9/449
• CPC Class Codes: H04L 12/433 with asynchronous transmission, e.g. token ring, register insertion
• CPC Class Codes: H04L 67/01 Protocols

Abstract

Remote method invocation using a generic proxy class. A client machine transmits a call for invocation of a method of a remote object including an identifier for the method object. A server machine receives the identifier and uses generic code to invoke the method object and return an indication of the invoked method along with any relevant parameters.

Claims

1. A method for remote method invocation in a distributed system comprised of multiple machines, comprising:

receiving a request to invoke a method of an object;

determining the method to be invoked using a generic code, wherein the generic code is not pregenerated;

invoking the method based on the determination; and

providing an indication of the invoked method.

2. The method of claim 1 wherein the receiving includes

providing an identifier associated with the method.

3. A method for remote method invocation in a distributed object oriented system having multiple machines and defining a plurality of classes, comprising:

receiving a request to invoke a method of an object of a specific class;

determining the method using a common process for all of the classes wherein the common process is not pregenerated;

invoking the method based on the determination; and

providing an indication of the invoked method.

4. The method of claim 3 wherein the receiving includes

providing an identifier associated with the method.

5. A method for remote method invocation in a distributed system comprised of multiple machines, comprising:

receiving a request to invoke a first method of a first object and a second method of a second object being of a different type from the first object;

determining the first and second methods to be invoked using a common process, wherein the common process is not pregenerated;

invoking the first and second methods based on the determination; and

providing an indication of the first invoked method and the second invoked method.

6. An apparatus for remote method invocation in a distributed system comprised of multiple machines, comprising:

a module configured to receive a request to invoke a method of an object;

a module configured to determine the method to be invoked using a generic code, wherein the generic code is not pregenerated;

a module configured to invoke the method based on the determination; and

a module configured to provide an indication of the invoked method.

7. The apparatus of claim 6 wherein the receive module includes

a module configured to provide an identifier associated with the method.

8. An apparatus for remote method invocation in a distributed system comprised of multiple machines, comprising:

a module configured to receive a request to invoke a method of an object of a specific class;

a module configured to determine the method using a common process for all of the classes, wherein the common process is not pregenerated;

a module configured to invoke the method based on the determination; and

a module configured to provide an indication of the invoked method.

9. The apparatus of claim 8 wherein the receive module includes

a module configured to provide an identifier associated with the method.

10. An apparatus for remote method invocation in a distributed system comprised of multiple machines, comprising:

a module configured to receive a request to invoke a first method of a first object and a second method of a second object being of a different type from the first object;

a module configured to determine the first and second methods to be invoked using a common process, wherein the common process is not pregenerated;

a module configured to invoke the first and second methods based on the determination; and

a module configured to provide an indication of the first invoked method and the second invoked method.

11. A system for transmitting objects in a distributed system comprised of multiple machines, comprising:

a first machine;

a second machine;

a network connecting the first machine with the second machine; and

an apparatus for transmitting objects, the apparatus including;

a module configured to receive a request to invoke a method of an object;

a module configured to determine the method to be invoked using a generic code, wherein the generic code is not pregenerated;

a module configured to invoke the method based on the determination; and

a module configured to provide an indication of the invoked method.

12. The system of claim 11 wherein the receive module includes

a module configured to provide an identifier associated with the method.

13. A system for transmitting objects in a distributed system comprised of multiple machines, comprising:

a first machine;

a second machine;

a network connecting the first machine with the second machine; and

an apparatus for transmitting objects, the apparatus including;

a module configured to receive a request to invoke a method of an object of a specific class;

a module configured to determine the method using a common process for of the classes, wherein the common process is not pregenerated;

a module configured to invoke the method based on the determination; and

a module configured to provide an indication of the invoked method.

14. The system of claim 13 wherein the receive module includes

a module configured to provide an identifier associated with the method.

15. A system for transmitting objects in a distributed system comprised of multiple machines, comprising:

a first machine;

a second machine;

a network connecting the first machine with the second machine; and

an apparatus for transmitting objects, the apparatus including;

a module configured to receive a request to invoke a first method of a first object and a second method of a second object being of a different type from the first object;

a module configured to determine the first and second methods to be invoked using a common process, wherein the common process is not pregenerated;

a module configured to invoke the first and second methods based on the determination; and

a module configured to provide an indication of the first invoked method and the second invoked method.

16. A computer program product, comprising:

a computer-readable medium containing instructions for controlling a computer system to perform a method, the method including;

receiving a request to invoke a method of an object;

determining the method to be invoked using a generic code, wherein the generic code is not pregenerated;

invoking the method based on the determination; and

providing an indication of the invoked method.

17. The computer program product of claim 16 wherein the receiving includes

providing an identifier associated with the method.

18. A computer program product, comprising:

a computer-readable medium containing instructions for controlling a computer system to perform a method, the method including;

receiving a request to invoke a method of an object of a specific class;

determining the method using a common process for all of the classes, wherein the common process is not pregenerated;

invoking the method based on the determination; and

providing an indication of the invoked method.

19. The computer program product of claim 18 wherein the receiving includes

providing an identifier associated with the method.

20. A computer program product, comprising:

a computer-readable medium containing instructions for controlling a computer system to perform a method, the method including;

receiving a request to invoke a first method of a first object and a second method of a second object being of a different type from the first object;

determining the first and second methods to be invoked using a common process, wherein the common process is not pregenerated;

invoking the first method and second methods based on the determination; and

providing an indication of the first invoked method and the second invoked method.

21. An apparatus for remote method invocation in a distributed system comprised of multiple machines, comprising:

means for receiving a request to invoke a method of an object;

means for determining the method to be invoked using a generic code, wherein the generic code is not pregenerated;

means for invoking the method based on the determination; and

means for providing an indication of the invoked method.

22. A distributed system for remote method invocation comprising:

a first module for requesting an invocation of a remote object based on a generic proxy; and

a second module for executing generic code to invoke a remote object corresponding to the invocation request and returning an associated response to the first module.

23. The distributed system of claim 22, wherein the generic proxy is initialized to indicate a plurality of executable methods.

24. A distributed processing system comprising:

a client machine having a remote procedure call module;

a serve machine having a remote object with at least one method;

a network communicably connecting the client machine and the server machine,

wherein when a code executing on the client machine seeks to invoke the method of the remote object, the client remote procedure uses a generic proxy that lacks a specific type to transmit a request to the remote object.

25. A process for invoking remote methods in a network, comprising:

providing a proxy with an invoke method; and

upon receipt by the proxy of a call to invoke a method of a remote object of a particular type, passing to the invoke method a method object including information about the remote method to be invoked and any required parameters for processing by the remote method,

wherein the proxy lacks a specific type so that it may be used to invoke methods of different types of remote objects.