Book Image

SOA Patterns with BizTalk Server 2009

By : Richard Seroter
Book Image

SOA Patterns with BizTalk Server 2009

By: Richard Seroter

Overview of this book

SOA is about architecture, not products and SOA enables you to create better business processes faster than ever. While BizTalk Server 2009 is a powerful tool, by itself it cannot deliver long-lasting, agile solutions unless we actively apply tried and tested service-oriented principles. The current BizTalk Server books are all for the 2006 version and none of them specifically looks at how to map service-oriented principles and patterns to the BizTalk product. That's where this book fits in. In this book, we specifically investigate how to design and build service-oriented solutions using BizTalk Server 2009 as the host platform. This book extends your existing BizTalk knowledge to apply service-oriented thinking to classic BizTalk scenarios. We look at how to build the most reusable, flexible, and loosely-coupled solutions possible in the BizTalk environment. Along the way, we dive deeply into BizTalk Server's integration with Windows Communication Foundation, and see how to take advantage of the latest updates to the Microsoft platform. Chock full of dozens of demonstrations, this book walks through design considerations, development options, and strategies for maintaining production solutions.
Table of Contents (18 chapters)
SOA Patterns with BizTalk Server 2009
Credits
About the author
About the reviewers
Preface
Index

Identifying Standard Message Exchange Patterns


When we talk about Message Exchange Patterns, or MEPs, we're considering the direction and timing of data between the client and service. How do I get into the bus and what are the implications of those choices? Let's discuss the four primary options.

Request/Response services

This is probably the pattern that's most familiar to you. We're all comfortable making a function call to a component and waiting for a response. When a service uses this pattern, it's frequently performing a remote procedure call where the caller accesses functionality on the distant service and is blocked until either a timeout occurs or until the receiver sends a response that is expected by the caller.

As we'll see below, while this pattern may set developers at ease, it may encourage bad behavior. Nevertheless, the cases where request/response services make the most sense are fine-grained functions and mashup services. If you need a list of active contracts that a...