Cluster communication manager

• US 20070162912A1
• Filed: 12/28/2005
• Published: 07/12/2007
• Est. Priority Date: 12/28/2005
• Status: Active Grant

• Current Assignee: SAP SE
• Original Assignee: SAP AG (SAP SE)
• Inventors: Kilian, Frank
• Granted Patent: US 7,831,600 B2
• Time in Patent Office: Days
• US Class Current: 719/313
• CPC Class Codes: G06F 2209/505 Clust
• CPC Class Codes: G06F 9/5061 Partitioning or combining of resources
• CPC Class Codes: G06F 9/546 Message passing systems or structures, e.g. queues

Abstract

A cluster manager application program library includes an event handler to communicate an event from an application server instance to which the library is linked to a message server in a cluster of application server instances. The library further includes a notification handler to receive at the application server instance a notification of an event in the cluster from the message server, and a message server communication handler to exchange messages between the application server instance and other application server instances in the cluster via the message server.

Claims

1. An application server instance, comprising:

a plurality of work processes;

a connection manager to receive requests, the connection manager comprising;

a dispatcher to dispatch the requests to the work processes to process;

a cluster manager to provide for internal cluster communication, the cluster manager comprising;

an event handler to communicate an event to a message server;

a notification handler to receive a notification of an event in the cluster; and

a message server communication handler to communicate messages to the message server.

2. The application server instance of claim 1, wherein the application server instance is a web application server instance.

3. The application server instance of claim 1, wherein the connection manager to receive the requests from a plurality of clients via a network to which the application server instance is coupled.

4. The application server instance of claim 1, wherein the cluster manager is implemented as an executable application program native to a platform on which the application server instance is to execute.

5. The application server instance of claim 1, wherein the platform is specific to a hardware and operating system platform.

6. The application server instance of claim 1, wherein the cluster manager to provide for communication between the work processes in the application server instance with work processes in another application server instance in the cluster.

7. The application server instance of claim 1, wherein the event handler to communicate an event to the message server in a central services instance in the cluster.

8. The application server instance of claim 1, wherein the notification handler to receive the notification from the message server.

9. A cluster manager comprising:

an event handler to communicate an event from an application server instance to a message server in a cluster of application server instances;

a notification handler to receive at the application server instance a notification of an event in the cluster from the message server; and

a message server communication handler to exchange messages between the application server instance and other application server instances in the cluster via the message server.

10. The cluster manager of claim 9, wherein the cluster manager is implemented as a software library.

11. The cluster manager of claim 10, wherein the library is dynamically linked with the application server instance.

12. The cluster manager of claim 11, wherein the library is dynamically linked to a connection manager in the application server instance.

13. An article of manufacture, comprising:

an electronically accessible medium comprising instructions, that when executed by a processor, cause the processor to;

communicate an event from an application server instance to a message server in a cluster of application server instances;

receive at the application server instance a notification of an event in the cluster from the message server; and

exchange messages between the application server instance and other application server instances in the cluster via the message server.

14. The article of manufacture of claim 13, wherein the instructions comprise a library of executable application program code.

15. The article of manufacture of claim 14, wherein to dynamically link the library to an application program that when executed by the processor causes the processor to provide a service in an application server instance.

16. The article of manufacture of claim 15, wherein the application program comprises a network connection manager.