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James Newkirk talks refactoring at Tech-Ed
Software applications must evolve. This evolution is best managed by thoughtful use of refactoring and design patterns, said James Newkirk, development lead for the Microsoft Platform Architecture Guidance team. He addressed these issues in his "Evolving to Patterns" session at Tech-Ed 2006.
Newkirk first talked about pattern implementation, which, he said, should occur during design or whenever there is bad code. If the "second person pays" rule is abided by, then code will be properly designed with future uses and releases in mind.
Once implemented, upkeep is key. Throughout application development, there are always changes that need to be designed for. Design should be evolutionary, or with changes in mind. And the tool for evolutionary design is refactoring.
Refactoring improves the design of existing code without changing the functionality. "Refactoring is truly about trying to improve the structure of the code," said Newkirk. So when do you refactor?
Newkirk suggested a "clean as you go" philosophy, which is closely akin to the “broken windows concept” that calls for police forces to monitor small nuisance crimes to better guard against their growth into larger and more dangerous crime waves. "Care about your code," he said. "This will help you avoid software bankruptcy, where you have to write it all over."
To prevent software bankruptcy, there are several things that should be avoided. Newkirk warned against code duplication. More than one instance of the same code will only further complicate things, he said. Simple code that has a clarified intent will help keep the overall code from failing.
Newkirk, known as a leader of NUnit 2.0 development, went on to talk about the dependency injection pattern, which he says is the "current hot pattern of the moment." While there are various benefits to the pattern, including loose coupling and improved test isolation, Newkirk also warned that the pattern is also more complicated, and needs to be executed with the above requirements for success in mind.
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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]
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(June 24, Article)
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(June 24, Article)
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(June 18, Cartoon)
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(June 29, Podcast)
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(June 25, Tech Talk)
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(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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