Managing Software Component Versions within a Service Oriented Architecture

• US 20090313335A1
• Filed: 06/13/2008
• Published: 12/17/2009
• Est. Priority Date: 06/13/2008
• Status: Active Grant

• Current Assignee: SAP SE
• Original Assignee: SAP AG (SAP SE)
• Inventors: Heidasch, Robert
• Granted Patent: US 7,774,404 B2
• Time in Patent Office: Days
• US Class Current: 709/206
• CPC Class Codes: G06F 9/541 via adapters, e.g. between incompatible applications

Abstract

In one embodiment the present invention includes a method for managing versions of various software components in a service-oriented architecture. A software component representing a service provider includes a message dispatcher to analyze a service request message received from a service consumer, and to determine whether the service request message specifies version mapping information. If the message does include version mapping information, a conversion algorithm is selected based on the version mapping information specified in the service request message. The message is then converted according to the selected conversion algorithm before being processed by the processing logic of the service provider. A service reply message is similarly converted before being sent to the service consumer.

Claims

1. A computer-implemented method comprising:

at a service provider, analyzing a service request message received from a service consumer to determine whether the service request message specifies version mapping information;

if the service request message specifies version mapping information, selecting a conversion algorithm based on the version mapping information specified in the service request message;

converting the service request message according to the selected conversion algorithm before processing the converted service request message to derive a service reply message; and

converting the service reply message according to the selected conversion algorithm before sending the converted service reply message to the service consumer.

2. The computer-implemented method of claim 1, wherein selecting a conversion algorithm based on the version mapping information specified in the service request message includes:

identifying a consumer version and a provider version specified in the version mapping information; and

if the provider version specified in the version mapping information is equivalent to the current version of the service provider, selecting a conversion algorithm configured to convert the service request message from a format consistent with the consumer version specified in the version mapping information to a format consistent with the provider version specified in the version mapping information.

3. The computer-implemented method of claim 1, wherein selecting a conversion algorithm based on the version mapping information specified in the service request message includes:

identifying a consumer version and a provider version specified in the version mapping information;

if the provider version specified in the version mapping information is not equivalent to the current version of the service provider, selecting a conversion algorithm configured to convert the service request message from a format consistent with the consumer version specified in the version mapping information to a format consistent with the current version of the service provider; and

sending to the service consumer a service reply message including version mapping information indicating the current version of the service provider.

4. The computer-implemented method of claim 1, wherein converting the service request message according to the selected conversion algorithm includes one or more of:

modifying the number of input elements specified in the service request message;

performing a data calculation to derive an input element to be included in the service request message; and

, modifying an attribute of an input element specified in the service request message.

5. The computer-implemented method of claim 1, wherein converting the service reply message according to the selected conversion algorithm includes one or more of:

modifying the number of output elements specified in the service reply message;

performing a data calculation to derive an output element to be included in the service request message; and

, modifying an attribute of an output element specified in the service request message.

6. The computer-implemented method of claim 1, further comprising

if the service request message does not specify version mapping information, processing the service request message to derive a service reply message;

and

if the service request message is processed without error, inserting version mapping information in the service reply message prior to sending the service reply message to the service consumer.

7. The computer-implemented method of claim 6, wherein the version mapping information inserted into the service reply message specifies a consumer version and a provider version, and both the consumer version and the provider version are set to the current version of the service provider.

8. The computer-implemented method of claim 6, further comprising:

after inserting version mapping information in a service reply message and sending the service reply message to the service consumer, receiving a second service request message from the service consumer, wherein the second service request message includes the version mapping information previously inserted into the service reply message;

selecting a conversion algorithm based on the version mapping information specified in the second service request message;

converting the second service request message according to the selected conversion algorithm before processing the converted second service request message to derive a second service reply message; and

converting the second service reply message according to the selected conversion algorithm before sending the converted second service reply message to the service consumer.

9. A computer-readable medium having instructions stored thereon, which, when executed by a computer, cause the computer to:

analyze, at a service provider, a service request message received from a service consumer to determine whether the service request message specifies version mapping information;

if the service request message specifies version mapping information, select a conversion algorithm based on the version mapping information specified in the service request message;

convert the service request message according to the selected conversion algorithm before processing the converted service request message to derive a service reply message; and

convert the service reply message according to the selected conversion algorithm before sending the converted service reply message to the service consumer.

10. The computer-readable medium of claim 9, wherein selecting a conversion algorithm based on the version mapping information specified in the service request message includes:

identifying a consumer version and a provider version specified in the version mapping information; and

if the provider version specified in the version mapping information is equivalent to the current version of the service provider, selecting a conversion algorithm configured to convert the service request message from a format consistent with the consumer version specified in the version mapping information to a format consistent with the provider version specified in the version mapping information.

11. The computer-readable medium of claim 9, wherein selecting a conversion algorithm based on the version mapping information specified in the service request message includes:

identifying a consumer version and a provider version specified in the version mapping information;

if the provider version specified in the version mapping information is not equivalent to the current version of the service provider, selecting a conversion algorithm configured to convert the service request message from a format consistent with the consumer version specified in the version mapping information to a format consistent with the current version of the service provider; and

sending to the service consumer a service reply message including version mapping information indicating the current version of the service provider.

12. The computer-readable medium of claim 9, wherein converting the service request message according to the selected conversion algorithm includes one or more of:

modifying the number of input elements specified in the service request message;

performing a data calculation to derive an input element to be included in the service request message; and

, modifying an attribute of an input element specified in the service request message.

13. The computer-readable medium of claim 9, wherein converting the service reply message according to the selected conversion algorithm includes one or more of:

modifying the number of output elements specified in the service reply message;

performing a data calculation to derive an output element to be included in the service reply message; and

, modifying an attribute of an output element specified in the service reply message.

14. The computer-readable medium of claim 9, having further instructions, which, when executed, cause the computer to:

process the service request message to derive a service reply message if the service request message does not specify version mapping information; and

if the service request message is processed without error, insert version mapping information in the service reply message prior to sending the service reply message to the service consumer.

15. The computer-readable medium of claim 14, wherein the version mapping information inserted into the service reply message specifies a consumer version and a provider version, and both the consumer version and the provider version are set to the current version of the service provider.

16. The computer-readable medium of claim 9, having further instructions, which, when executed, cause the computer to:

receive a second service request message from the service consumer after inserting version mapping information in a service reply message and sending the service reply message to the service consumer, wherein the second service request message includes the version mapping information previously inserted into the service reply message;

select a conversion algorithm based on the version mapping information specified in the second service request message;

converting the second service request message according to the selected conversion algorithm before processing the converted second service request message to derive a second service reply message; and

converting the second service reply message according to the selected conversion algorithm before sending the converted second service reply message to the service consumer.

17. An apparatus having a processor and memory for executing instructions, said apparatus further comprising:

a message dispatcher configured to analyze a service request message received at a service provider from a service consumer to determine whether the service request message specifies version mapping information, and to select a conversion algorithm based on the version mapping information specified in the service request message if the service request message specifies version mapping information;

a message converter configured to convert the service request message according to the conversion algorithm selected by the message dispatcher, and to convert a service reply message according to the conversion algorithm selected by the message dispatcher; and

processing logic to process the converted service request message to derive the service reply message before the service provider sends the service reply message to the service consumer.

18. The apparatus of claim 17, wherein the message dispatcher is configured to identify a consumer version and a provider version specified in the version mapping information, and to select a conversion algorithm configured to convert the service request message from a format consistent with the consumer version specified in the version mapping information to a format consistent with the provider version specified in the version mapping information, if the provider version specified in the version mapping information is equivalent to the current version of the service provider.

19. The apparatus of claim 17, wherein the message dispatcher is configured to i) dispatch the service request message directly to the processing logic if the service request message does not specify version mapping information, and ii) insert version mapping information in a service reply message before the service provider sends the service reply message to the service consumer, if the service request message is processed by the processing logic without error.

20. The apparatus of claim 17, further comprising a version identification to indicate the current version of the processing logic of the service provider.