METHOD AND APPARATUS FOR DYNAMIC WEB SERVICE CLIENT APPLICATION UPDATE

• US 20090106350A1
• Filed: 10/23/2007
• Published: 04/23/2009
• Est. Priority Date: 10/23/2007
• Status: Active Grant

• Current Assignee: Wrp IP Management, LLC
• Original Assignee: International Business Machines Corporation
• Inventors: Frank, David C., Chen, Ying, Fong, Liana Liyow, Lam, Linh Hue, Fang, Ru
• Granted Patent: US 7,822,840 B2
• Time in Patent Office: Days
• US Class Current: 709/203
• CPC Class Codes: G06F 2209/541 Client-server
• CPC Class Codes: G06F 9/54 Interprogram communication
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]

Abstract

A method for managing a web service client update without recompiling or redeploying of the client code includes the following steps or acts of: receiving a request for the web service from a subscribed client; transmitting the request to the web service; receiving notification of the web service update from a service provider or registry or some other means; parsing the notification and retrieving parameters describing the web service update; marshalling the parameters; determining whether the new web service update is compatible with the current web service invoked by the client application; updating the local service proxy instance with the marshaled parameters if the new web service update is compatible with the current web service invoked by the client application; and transmitting a notification if the web service update is not compatible with the current web service invoked by the client application.

Claims

1. A method for managing a web service client update, the method comprising:

receiving a request for the web service from a client;

transmitting the request to the web service;

receiving notification of the web service update;

parsing the notification and retrieving parameters describing the web service update;

marshalling the parameters;

determining whether the web service update is compatible with a current web service invoked by the client'"'"'s application;

updating the local service proxy instance with the marshaled parameters if the web service update is compatible with the current web service invoked by the client application; and

transmitting a notification to a user if the web service update is not compatible with the current web service invoked by the client application.

2. The method of claim 1 wherein the parameters comprise configuration parameters and service signature definition parameters pertaining to the web service update.

3. The method of claim 1 further comprising storing the parameters in a local repository.

4. The method of claim 3 further comprising locally storing a change history of changes in the parameters.

5. The method of claim 2 further comprising setting a default value for any new parameter.

6. The method of claim 1 wherein the step of receiving notification comprises receiving notification of the web service update from a service provider.

7. The method of claim 1 further comprising an initial step of receiving a subscription of the client to the web service.

8. The method of claim 7 wherein the subscribing step comprises subscribing to a service directory or a service provider such that a client is notified when a change occurs to the web service registered in the service directory or hosted by the service provider.

9. An information processing system for managing a web service client application update, the system comprising:

a processor configured to;

receive a request for the web service from a client;

transmit the request to the web service;

receive notification of the web service update;

parse the notification and retrieving parameters describing the web service update;

marshal the parameters;

determine whether the web service update is compatible with a current web service invoked by the client'"'"'s application;

update the local service proxy instance with the marshaled parameters if the web service update is compatible with the current web service invoked by the client application; and

transmit a notification to a user if the web service update is not compatible with the current web service invoked by the client application.

10. The system of claim 9 further comprising:

a version agent disposed between the web service client application and the processor, configured for providing dynamic proxy updating, the version agent comprising;

a notification receiver and parser configured for receiving and parsing a notification message from an outside source; and

a proxy instance checker configured for

determining compatibility of the web service update; and

updating information in a proxy instance.

11. The system of claim 10 wherein the version agent is a proxy server.

12. The system of claim 9 wherein the processor is a SOAP engine.

13. The system of claim 10 wherein the outside source is a service registry.

14. The system of claim 10 wherein the proxy instance checker is configured for updating information in the proxy instance according to the notification message for backward-compatible service changes.

15. The system of claim 10 wherein the proxy instance checker is configured for generating the notification message to the client for incompatible service changes.

16. The system of claim 10 wherein the web service client application is a Remote Method Invocation (RMI) service.

17. The system of claim 10 wherein the web service client application is a Common Object Request Broker Architecture (CORBA) service.

18. The system of claim 10 further comprising storage configured for storing multiple versions of the web service such that the web service client application binds to a particular version of the web service.

19. A computer program product embodied on a computer storage medium, the computer program product comprising program code instructions that, when executed, causes the computer program product to perform the following:

receive a request for the web service from a client;

transmit the request to the web service;

receive notification of the web service update;

parse the notification and retrieving parameters describing the web service update;

marshal the parameters;

determine whether the web service update is compatible with a current web service invoked by the client'"'"'s application;

update the local service proxy instance with the marshaled parameters if the web service update is compatible with the current web service invoked by the client application; and

transmit a notification to a user if the web service update is not compatible with the current web service invoked by the client application.

20. The computer program product of claim 19 embodied on an application specific integrated circuit.