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Microsoft® SQL Server 2008 R2 Unleashed
book

Microsoft® SQL Server 2008 R2 Unleashed

by Ray Rankins, Paul Bertucci, Chris Gallelli, Alex T. Silverstein
September 2010
Intermediate to advanced content levelIntermediate to advanced
1704 pages
111h 8m
English
Sams
Content preview from Microsoft® SQL Server 2008 R2 Unleashed

Planning Conversations Between Services

A conversation is a dialog between two services. The purpose of this dialog is, of course, the sending and receiving of messages, which ultimately leads to the completion of a task.

A powerful feature of Service Broker messaging is that it guarantees exactly-once-in-order (EOIO) messaging. This means that messages are sent exactly once; there’s no chance that a message can be sent twice because of a system issue, so the receiver doesn’t have to check whether a message has already been processed. It also means that messages are always ordered in their queue in the same order in which they were sent. (The queuing_order column of the queue indicates this order.) Service Broker makes sure of this, even in ...

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Publisher Resources

ISBN: 9780768696585Purchase book