N-GEN Communications Web-based Seminars ©NGCS

Seminar - An Overview of Communications Technologies

Module 6 - Internet, Intranet, Extranet, e-Commerce and Web Services                                      Slide 66 of 70 _________________                                                                                  __________

                                        Searching for a Web Service

_________________                                                                                  __________

A service provider describes the service using WSDL and registers the service in aUDDI registry. The UDDI registry maintains pointers to the WSDL description and to the service.

When a service consumer wants to use a service, he asks the UDDI registry to find a service that matches his needs and obtains the WSDL description of the service, as well as the access point of the service. The service consumer uses the WSDL description to construct a SOAP message to communicate with the Web Service. Some times a Service Broker is used to find the required service.

A service provider simply deploys Web Services. A service requester tries to find Web Services using the service broker; if it finds a Web Service it wants to use, it tries to set up a contract with the service provider in order to use the Web Service.