Connection manager having a common dispatcher for heterogeneous software suites

• US 7,672,949 B2
• Filed: 12/28/2004
• Issued: 03/02/2010
• Est. Priority Date: 12/28/2004
• Status: Active Grant

• Current Assignee: SAP SE
• Original Assignee: SAP AG (SAP SE)
• Inventors: Luik, Oliver, Kilian, Frank
• Primary Examiner(s): Woo; Isaac M
• Assistant Examiner(s): Yen; Syling
• Application Number:
  US11/025,378
• Publication Number:
  US 20060155867A1
• Time in Patent Office: 1,890 Days
• Field of Search: 719/312, 709/228, 709/219, 709/222, 709/226, 709/229, 709/220, 707/10, 707/9, 707/204, 717/102
• US Class Current: 709/213
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols

Abstract

A connection manager includes a dispatcher that dispatches requests to two or more heterogeneous software suites. The connection manager receives client requests and dispatches the request to either of the software suites coupled by a request/response shared memory to the connection manager.

Claims

1. An application server comprising:

a protocol independent connection manager to receive a request from a client, the connection manager including a common dispatcher for at least two heterogeneous application server software suites of the application server, the connection manager to select which one of the heterogeneous application server software suites and which of a plurality of worker nodes included in one of the software suites is appropriate to process the request from the client and to dispatch the request to the selected worker node of the selected software suite, wherein selecting the worker node is based at least in part on whether a session associated with the request is an existing session, whether the session associated with the request is a new session, and a type of the session associated with the request, the type of the session indicating whether more than one worker node are permitted to handle requests for the session;

a first software suite of the heterogeneous application server software suites configured to receive and process the request from the client, the first software suite including a first plurality of worker nodes, the first software suite comprising a proprietary application instance;

a second software suite of the heterogeneous application server software suites, the second software suite being different from the first software suite, the second software suite being configured to receive and process the request from the client, the second software suite including a second plurality of worker nodes, the second software suite comprising a standard-based application instance; and

a request/response shared memory that is accessible to the connection manager, the first software suite, and the second software suite, wherein the connection manager is to transfer the request to the request/response shared memory, the request/response shared memory to support data transfers for requests and responses for both the first software suite and the second software suite, and wherein the selected worker node is to retrieve the request from the request/response shared memory.

2. The application server of claim 1, wherein the connection manager is configured of receiving the request from the client formatted in any of a plurality of protocols through use of protocol handler for each protocol.

3. The application server of claim 2, wherein one of the plurality of protocols comprises one of a group of protocols including hypertext transfer protocol (HTTP), secure HTTP (HTTPS), simple mail transfer protocol (SMTP), and network news transfer protocol (NNTP).

4. The application server of claim 1, wherein the proprietary software suite comprises an ABAP (Advanced Business Application Programming) application instance and the standards-based software suite comprises a J2EE (Java 2 Platform, Enterprise Edition) application instance, and wherein the connection manager selecting which of at least two heterogeneous software suites to process the request comprises the connection manager selecting one of the ABAP application instance and the J2EE application instance to process the request.

5. The application server of claim 4, wherein the ABAP application instance comprises the first plurality of worker nodes, and the J2EE application instance comprises the second plurality of worker nodes, and wherein the connection manager selecting which of the ABAP application instance and the J2EE application instance and which of the plurality of worker nodes to process the request comprises the connection manager selecting one of the plurality of ABAP worker nodes or J2EE worker nodes to process the request.

6. The application server of claim 5, wherein the request/response shared memory has a connection oriented architecture, wherein a connection is established between the connection manager and the worker node the dispatcher selected to process the request.

7. The application server of claim 1, wherein the connection manager selecting a worker node for an existing session comprises the connection manager selecting a worker node that is different than a worker node currently assigned to the session if the session is distributable.

8. The application server of claim 7, wherein the connection manager selecting a worker node comprises the connection manager selecting a same worker node as selected to process a previous request related to the same session if the state of the session is sticky.

19. The application server of claim 1, wherein the selected worker node is to store a response to the request in the request/response shared memory, and wherein the connection manager is to retrieve the response from the request/response shared memory and forward the response to the client.

22. The application server of claim 1, wherein the selected worker node changes the type of the session.

23. The application server of claim 22, wherein the selected worker node changes the type of the session from distributable to sticky.

24. The application server of claim 1, wherein if the selected worker node fails and the type of the session is sticky, then the session is determined to be corrupted and the connection manager does not select a new worker node for the session.

25. The application server of claim 1, wherein if the selected worker node fails, the type of session is sticky, and a session object for the worker node is stored in a storage after each request response, then the connection manager is to select a new worker node for the session.

9. A method comprising:

receiving a request from a client at a protocol independent connection manager of an application server, the connection manager including a dispatcher compatible with for at least two heterogeneous software suites of the application server;

selecting at the connection manager which one of the at least two heterogeneous software suites is appropriate to process the request, the at least two heterogeneous software suites including a first software suite including a first plurality of worker nodes and a second software suite including a second plurality of worker nodes, wherein the first software suite comprises a proprietary application instance and the second software suite comprises a standards-based application instance;

selecting a worker node of the plurality of worker nodes of the selected software suite to process the request, wherein selecting the worker node is based at least in part on whether a session associated with the request is an existing session, whether the session associated with the request is a new session, and a type of the session associated with the request, the type of the session indicating whether more than one worker node are permitted to handle requests for the session;

transferring the request from the connection manager to a request/response shared memory coupling the connection manager and the heterogeneous software suites, the request/response shared memory being accessible to the first plurality of worker nodes of the first software suite and the second plurality of worker nodes of the second software suite, the request/response shared memory to support data transfers for requests and responses for both the first software suite and the second software suite; and

receiving the request from the request/response shared memory at the worker node selected to process the request.

10. The method of claim 9, wherein the first software suite comprises an ABAP (Advanced Business Application Programming) application instance and the second software suite comprises a J2EE (Java 2 Platform, Enterprise Edition) application instance, and wherein selecting which one of the at least two heterogeneous software suites to process the request comprises selecting one of the ABAP application instance and the J2EE application instance to process the request.

11. The method of claim 10, wherein the ABAP application instance comprises the first plurality of worker nodes, and the J2EE application instance comprises the second plurality of worker nodes, and wherein selecting one of the ABAP application instance and the J2EE application instance to process the request comprises selecting one of the plurality of ABAP worker nodes or J2EE worker nodes to process the request.

12. The method of claim 9, wherein selecting a worker node for an existing session comprises selecting a worker node that is different than a worker node currently assigned to the session if the session is distributable.

13. The method of claim 12, wherein selecting the worker node comprises selecting a same worker node as selected to process a previous request related to the same session if the state of the session is sticky.

20. The method of claim 9, further comprising:

storing a response to the request in the request/response shared memory;

retrieving the response from the request/response shared memory at the connection manager; and

forwarding the response to the client.

14. An article of manufacturer comprising:

a computer-readable medium having stored thereon instructions that, when executed by a processor, cause the processor to;

receive a request from a client at a protocol independent connection manager of an application server, the connection manager including a dispatcher for at least two heterogeneous software suites of the application server;

select at the connection manager which one of the at least two heterogeneous software suites is appropriate to process the request, the at least two heterogeneous software suites including a first software suite including a first plurality of worker nodes and a second software suite including a second plurality of worker nodes, wherein the first software suite comprises a proprietary application instance and the second software suite comprises a standard-based application instance;

select a worker node of the plurality of worker nodes of the selected software suite to process the request, wherein selecting the worker node is based at least in part on whether a session associated with the request is an existing session, whether the session associated with the request is a new session, and a type of the session associated with the request, the type of the session indicating whether more than one worker node are permitted to handle requests for the session;

transfer the request from the connection manager to a request/response shared memory shared by the connection manager and the heterogeneous software suites, the request/response shared memory being accessible to the first plurality of worker nodes for the first software suite and the second plurality of worker nodes of the second software suite; and

receive the request from the request/response shared memory at the worker node selected to process the request.

15. The article of manufacture of claim 14, wherein the first software suite comprises an ABAP (Advanced Business Application Programming) application instance and the second software suite comprises a J2EE (Java 2 Platform, Enterprise Edition) application instance, and wherein the medium comprises further instructions that when executed by a processor cause the processor to select one of the ABAP application instance and the J2EE application instance to process the request.

16. The article of manufacture of claim 15, wherein the ABAP application instance comprises the first plurality of worker nodes, and the J2EE application instance comprises the second plurality of worker nodes, and wherein the medium comprises further instructions that when executed by a processor cause the processor to select one of the plurality of ABAP worker nodes or J2EE worker nodes to process the request.

17. The article of manufacture of claim 14, wherein selecting a worker node for an existing session comprises the connection manager selecting a worker node that is different than a worker node currently assigned to the session if the session is distributable.

18. The article of manufacture of claim 17, wherein selecting the worker node comprises selecting a same worker node as selected to process a previous request related to the same session if the state of the session is sticky.

21. The article of manufacture of claim 14, wherein the medium comprises further instructions that when executed by a processor cause the processor to:

store a response to the request in the request/response shared memory;

retrieve the response from the request/response shared memory at the connection manager; and

forward the response to the client.