UDDI, DISCO, and web services

- Koushik Nimmagadda

Web Services According to the W3C a Web service is a

software system designed to support interoperable machine-to-machine interaction over a network.

Provides a standard, universal medium for independent applications to communicate over http

Use of WSDL Accepted architecture for Distributed

applications and for SOA(Serivce Oriented Architectures).

Contd..

Issues and Concerns How are Web Services created Who knows about their existence ‘QoS’ Other issues

Web Service and related technologies

Creation WSDL

Deployment (Publishing) UDDI registry

Discovery DISCO and UDDI

Consumption Proxy classes

Contd..

UDDI

Universal Description Discovery and Integration

UDDI is a public registry designed to house information about businesses and their services in a structured way.

More than Yellow Pages.

Registering in UDDI Modeling UDDI Entry

Determine the tModels (WSDL files) . Determine the name of company and a brief

description of the company Determine the categories

North American Industry Classification System (NAICS),

Universal Standard Products and Services Codes (UNSPSC)

ISO 3166 Determine Web Services and Categories.

Discovery UDDI inquiry operations. Inquiry based on

businesses, services and tModels sample Inquiry based on business

<?xml version='1.0' encoding='utf-8'?> <s:Envelope

xmlns:s='http://schemas.xmlsoap.org/soap/envelope> <s:Body> <find_business generic="1.0" xmlns="urn:uddi-

org:api"> <name>Microsoft</name> </find_business> </s:Body>

</s:Envelope>

DISCO DISCO, introduced in .NET, makes it possible for

clients to reflect against endpoints to discover services and their associated WSDL documents.

<disco:discovery xmlns:disco="http://schemas.xmlsoap.org/disco/" xmlns:scl="http://schemas.xmlsoap.org/disco/scl/"> <!-- reference to other DISCO document --> <disco:discoveryRef ref="related-services/default.disco"/> <!-- reference to WSDL and documentation --> <scl:contractRef ref="math.asmx?wsdl" docRef="math.asmx"/> </disco:discovery>

Contd.. \inetpub

\wwwroot \math (vroot) math.asmx web.config

math.disco \bin

simpleMath.dll complexMath.dll c:\temp> disco.exe http://localhost/math/math.disco c:> wsdl resutls.discomap

References

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnanchor/html/anch_uddi.asp

http://msdn.micrsoft.com http://msdn2.microsoft.com/en-us/

library/sd5s0c6d.aspx

Questions.