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New Article Released: Service Patterns and Anti-Patterns
MSDN has released a new article on Principles of Service Design that show patterns for creating a SOA as well as anti-patterns (what NOT to do). The paper is the first in a series and starts with an explanation of the four tenets of services and then covers patterns including document processing and idempotency.
SOA is an architectural approach to creating systems built from autonomous services. With SOA, integration becomes forethought rather than afterthought—the end solution is likely to be composed of services developed in different programming languages, hosted on disparate platforms with a variety of security models and business processes. While this concept sounds incredibly complex it is not new—some may argue that SOA evolved out of the experiences associated with designing and developing distributed systems based on previously available technologies. Many of the concepts associated with SOA, such as services, discovery, and late binding were associated with CORBA and DCOM. Similarly, many service design principles have much in common with earlier OOA/OOD techniques based upon encapsulation, abstraction, and clearly defined interfaces.
The paper mentions two anti-patterns, the first being a web service interface that is too fine grained and tied to CRUD operatoins for objects and the second is a too generic interface with no real service contract.
The actual patterns presented show how to use request/response messages to ensure document centric communications and also how to handle idempotency and another pattern about reservations.
Read Principles of Service Design: Service Patterns and Anti-Patterns
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Language "mashups" will become more prominent, and developers will become polyglots, one programmer suggests.
SearchWinDevelopment.com offers an introduction to the language, performance, testing and data management improvements in VS 2008.
VBCode.com code snippets cover all aspects of application development, from data binding to security to the user interface.
Get up to date on XAML best practices with a variety of articles, tutorials and webcasts. [SearchWinDevelopment.com]
One team's experience with the VSTS DB edition suggests that it can improve workflow for dev teams. It also enhanced Agile efforts.
(June 24, Article)
Microsoft has begun to include DSL tools in the VSTS kit. A new book by Steve Cook and other VSTS team members helps set the stage.
(June 24, Article)
Cartoon: Be it ever so humble there is no place like your home after you get a Microsoft Home Server .
(June 18, Cartoon)
Microsoft's Thom Robbins says new technology to highlight in NET 3.5 includes AJAX, LINQ for both C# and VB, as well as tooling enhancements intended to ease the task of building WPF, WF and WCF apps.
(June 29, Podcast)
Venkat Subramaniam discusses AJAX bottlenecks, the tenets of Agile development and more. He spoke at the Ajax Experience.
(June 25, Tech Talk)
In the second of a two-part series, Michele Leroux Bustamente discusses design decisions related to the claims-based security model. Read the story and walk through the process for creating a set of claims-based utilities to encapsulate claims authorization at the service tier.
(May 24, Article)
Understanding why the Entity Framework exists and learning where it can fit into your projects can get you prepared for the eventual release early next year.
(May 10, Article)
Resource: This learning guide gives you quick access to useful links on Windows Communication Foundation security information.
(April 24, Article)
TSS.NET's Jack Vaughan spoke recently spoke with Microsoft's Brad Abrams to find out what he is seeing in the field and what the chefs in Redmond are cooking. Along the way he discusses patterns of AJAX frameworks.
(April 11, Article)
In a two-part series, Michele Leroux Bustamente explains how claims-based security is supported by WCF, and how you can implement a claims-based security model for your services.
(March 29, Article)
Windows Workflow Foundation is a new technology that many developers will need to get their heads around. In a brief excerpt adapted from Programming Windows Workflow Foundation: Practical WF Techniques and Examples using XAML and C#, K.Scott Allen considers aspects of workflow definition.
(March 22, Chapter Excerpt)
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