Dynamic invocation of web services

• US 20030204622A1
• Filed: 04/26/2002
• Published: 10/30/2003
• Est. Priority Date: 04/26/2002
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Hogan, Bryan A., Weitzel, Mark D., Blizniak, Paul K.
• Granted Patent: US 7,475,145 B2
• Time in Patent Office: Days
• US Class Current: 709/241
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/51 Discovery or management thereof, e.g. service location protocol [SLP] or web services
• CPC Class Codes: H04L 67/563 Data redirection of data network streams

Abstract

A method for dynamically invoking a Web service. The method can include assembling a collection of references to remote implementations of the Web service based upon a common port type. One or more ports bound to the remote implementations of the Web service can be identified, and a set of port selection rules can be applied to the identified ports to select a particular one of the ports. Finally, the Web service can be invoked through the selected port. Notably, the identifying step can include parsing a Web service implementation document for each referenced remote implementation in the collection. The parsing can produce a list of ports through which the remote implementations can be invoked. Also, the method can further include compiling the set of port selection rules according to at least one of high-availability concerns, quality of service concerns and economic concerns.

Claims

1. A system for dynamically invoking an operation in a remote instance of a Web service, the system comprising:

a set of port selection rules for selecting one of a set of ports through which a remote instance of a Web service can be invoked;

a Web services container configured to service requests for Web services by invoking remote instances of said requested Web services; and

,

a port resolution processor disposed within said Web services container, said port resolution processor having a configuration for dynamically selecting, according to said port selection rules, an individual port from among said set of ports through which said Web services container can invoke said remove instances of said requested Web services.

2. The system of claim 1, further comprising at least one Web service implementation document specifying said set of ports.

3. The system of claim 2, further comprising a Web service schema specifying both a port type for said Web service and a binding between said port type and a particular transport protocol.

4. The system of claim 2, wherein said Web service implementation document conforms to the Web Services Description Language (WSDL).

5. The system of claim 1, wherein said Web service container further comprises a Web service discovery processor able to query a remote registry of Web services to identify sets of Web service implementations which can satisfy said requests.

6. A method for dynamically invoking a Web service comprising the steps of:

assembling a collection of references to remote implementations of the Web service based upon a common port type;

identifying a plurality of ports bound to said remote implementations of the Web service;

applying a set of port selection rules to said identified ports to select a particular one of said ports; and

,

invoking Web service through said selected port.

7. The method of claim 6, wherein said identifying step comprises the step of parsing a Web service implementation document for each referenced remote implementation in said collection, said parsing producing a list of ports through which said remote implementations can be invoked.

8. The method of claim 6, further comprising the step of compiling said set of port selection rules according to at least one of high-availability concerns, quality of service concerns and economic concerns.

9. A machine readable storage having stored thereon a computer program for performing dynamic port selection, said computer program comprising a routing set of instructions for causing the machine to perform the steps of:

assembling a collection of references to remote implementations of the Web service based upon a common port type;

identifying a plurality of ports bound to said remote implementations of the Web service;

applying a set of port selection rules to said identified ports to select a particular one of said ports; and

,

invoking Web service through said selected port.

10. The machine readable storage of claim 9, wherein said identifying step comprises the step of parsing a Web service implementation document for each referenced remote implementation in said collection, said parsing producing a list of ports through which said remote implementations can be invoked.

11. The machine readable storage of claim 9, further comprising the step of compiling said set of port selection rules according to at least one of high-availability concerns, quality of service concerns and economic concerns.