UDDI

• UDDI stands for Universal Description, Discovery and Integration.
• UDDI consists of white pages where one can find addresses, contact and other identifiers; yellow pages where one can find the industrial categorizatioins based on standard taxanomies; and green pages where one can find the requisite technical information.
• UDDI stores all requisite information via 4 information types -- business information, service information, binding information and information about specific services
• Business information -- Stored through the businessEntity element whcih also includes support for the yellow pages
• Service Information -- The green page information is stored via the businessService and businessTemplate elements
• Has 2 different API`s - one for the enquirer and one for the publisher.
• HOw UDDI copes with failure : 4 point process.
• 1. Prepare program for web service, caching the required binding to use for run time. 2. Invoke the service using the cached bindingTemplate data. 3. If the call fails then use the binding key value and the getBindingTemplate API call to get a fresh copy of a binding template. 4. Compare the new information with the old one; if it is different retry the failed call. if the retry succeds relace teh cached data with the new one.
• Remmenber that the UDDI registry also has to provides for mechanisms of Identity and Authorization