Duplicated naming service in a distributed processing system

• US 20020023173A1
• Filed: 03/09/2001
• Published: 02/21/2002
• Est. Priority Date: 11/05/1998
• Status: Active Grant

• Current Assignee: Oracle International Corporation (Oracle Corporation)
• Original Assignee: BEA Systems Incorporated (Oracle Corporation)
• Inventors: Halpern, Eric M., Jacobs, Dean B.
• Granted Patent: US 6,928,457 B2
• Time in Patent Office: Days
• US Class Current: 709/245
• CPC Class Codes: G06F 9/465 Distributed object oriented systems remote method invocation [RMI] G06F9/548
• CPC Class Codes: G06F 9/548 Object oriented; Remote method invocation [RMI] non-remote method invocation G06F9/449
• CPC Class Codes: Y10S 707/99945 Object-oriented database structure processing
• CPC Class Codes: Y10S 707/99952 Coherency, e.g. same view to multiple users

Abstract

A clustered enterprise Java™ distributed processing system is provided. The distributed processing system includes a first and a second computer coupled to a communication medium. The first computer includes a Java™ virtual machine (JVM) and kernel software layer for transferring messages, including a remote Java™ virtual machine (RJVM). The second computer includes a JVM and a kernel software layer having a RJVM. Messages are passed from a RJVM to the JVM in one computer to the JVM and RJVM in the second computer. Messages may be forwarded through an intermediate server or rerouted- after a network reconfiguration. Each computer includes a Smart stub having a replica handler, including a load balancing software component and a failover software component. Each computer includes a duplicated service naming tree for storing a pool of Smart stubs at a node. The computers may be programmed in a stateless, stateless factory, or a stateful programming model. The clustered enterprise Java™ distributed processing system allows for enhanced scalability and fault tolerance.

Claims

1. An apparatus, comprising a communication medium;

a first processing device, coupled to the communication medium having a naming service; and

a second processing device, coupled to the communication medium, having a replicated naming service.

2. The apparatus of claim 1, wherein the naming service is a JNDI-compliant naming service.

3. The apparatus of claim 1, wherein the replica naming service is available upon the failure of the first naming service.

4. The apparatus of claim 1, wherein the first naming service includes a naming tree having a node including a service pool and wherein the replicated naming service includes a replicated naming tree.

5. The apparatus of claim 4, wherein the service pool includes a current list of service providers.

6. The apparatus of claim 5, wherein the first processing device includes a service provider in the list of service providers.

7. The apparatus of claim 4, wherein the service pool includes a stub.

8. The apparatus of claim 1, wherein the naming service and the replicated naming service are created by a multicast program.

9. The apparatus of claim 1, wherein the first processing device includes a first stub having a replica handler and the second processing device includes a second stub having a second replica handler.

10. A distributed processing system, comprising:

a communication medium;

a first computer, coupled to the communication medium, having a naming tree including a remote method invocation (RMI) stub for accessing a service provider;

a second computer, coupled to the communication medium, having a replicated naming tree and the service provider.

11. The distributed processing system of claim 10, wherein the first computer includes a first kernel for transferring a message to a second kernel in the second computer.

12. The distributed processing system of claim 11, wherein the first kernel includes a remote Java™

machine and the second kernel includes a remote Java™

machine.

13. The distributed processing system of claim 11, wherein the first kernel includes a thread manager software component.

14. The distributed processing system of claim 11, wherein the first kernel includes a socket manager software component.

15. The distributed processing system of claim 12, wherein the first remote Java™

virtual machine includes a peer-gone detection software component.

16. The distributed processing system of claim 12, wherein the first remote Java™

virtual machine includes a message compression software component.