Exam Ref 70-487: Developing Windows Azure and Web Services by William Ryan Wouter de Kort & Shane Milton

Author:William Ryan, Wouter de Kort & Shane Milton [William Ryan, Wouter de Kort, and Shane Milton]
Language: eng
Format: epub
Tags: COMPUTERS / Certification Guides / MCSE
ISBN: 9780735677234
Publisher: Microsoft Press
Published: 2013-11-14T05:00:00+00:00

Strict versioning

The more clients you have, the more damage versioning issues they can potentially cause, and the less control you have over the response. If you have one client, you might be able to offer them a discount for the inconvenience they encounter. You can offer them a free update to their client that they accept. But even with just one customer, they might say “no” and not tolerate it. The more clients you have, though, the more likely it is that you will run into one that has serious issues with version changes.

To make sure that you don’t cause any problems, you must ensure that any newly generated messages from your updated service validate against the old schema. The safest way to have this assurance is to never change existing contracts and just create new contracts, ideally ones with new and assuredly distinct XML namespaces.

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