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The Castle Windsor Inversion of Control Container

The Castle Windsor Inversion of Control Container. Mike Hadlow mikehadlow@yahoo.com mikehadlow.blogspot.com. What’s wrong with this code?. IoC Reporter. We can now test Reporter. IoC == Component Oriented Dev. Wikipedia says: Multiple use Non context specific

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The Castle Windsor Inversion of Control Container

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  1. The Castle Windsor Inversion of Control Container Mike Hadlow mikehadlow@yahoo.com mikehadlow.blogspot.com

  2. What’s wrong with this code?

  3. IoC Reporter

  4. We can now test Reporter

  5. IoC == Component Oriented Dev Wikipedia says: • Multiple use • Non context specific • Composable with other components • Encapsulated • A unit of independent deployment and versioning

  6. What is an IoC container? • A (very) smart factory • Automatically resolves dependencies • Automatically injects concrete instances • All services are registered in the container • Single point of access for services • Transparent • Various implementations for .NET

  7. Castle MicroKernel / Windsor • Part of the Castle Project castleproject.org • Started by Hamilton Verissimo • Also includes: • MonoRailMVC framework for ASP.NET • ActiveRecordbased on NHibernate

  8. Reporter with Windsor

  9. How dependencies are resolved Reporter IReportBuilder IReportSender

  10. Pros? • Simpler component architecture • Reduced cost of change • Easy to unit test • Easily move between application configurations • Ready made configuration (IoC containers)

  11. Cons? • Not another thing to learn? • Higher level of abstraction • Can’t do obfuscation and configuration

  12. Should I use it? • Already familiar with OO principles and patterns? • Already writing unit tests? If not, learn how to do these first Don’t impose an IoC container on a team which can’t see its benefit

  13. A Real Application http://code.google.com/p/sutekishop/ http://sutekishop.co.uk/

  14. Resources • Castle Project castleproject.org • Oren Einiayende.com/blog • Alex Henderson bittercoder.com

  15. Questions? Mike Hadlow mikehadlow@yahoo.com mikehadlow.blogspot.com

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