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Fun with ASP.NET MVC3, MEF and NuGet

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So you have a team of developers… And a nice architecture to build on… How about making that architecture easy for everyone and getting developers up to speed quickly? Learn all about integrating the managed extensibility framework (MEF) and ASP.NET MVC with some NuGet sauce for creating loosely coupled, easy to use architectures that anyone can grasp.

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Fun with ASP.NET MVC3, MEF and NuGet

  1. 1. DECEMBER 12, 2011 | SLIDE 1
  2. 2. www.realdolmen.com FUN WITH ASP.NET MVC 3, MEF AND NUGETDECEMBER 12, 2011 | SLIDE 2
  3. 3. WHO AM I?  Maarten Balliauw  Antwerp, Belgium Me, looking  www.realdolmen.com intelligent with  Focus on web glasses  ASP.NET MVC, PHP, Azure, SignalR, …  MVP Windows Azure (formerly ASP.NET)  Co-founder of AZUG  http://blog.maartenballiauw.be  @maartenballiauwDECEMBER 12, 2011 | SLIDE 4
  4. 4. AGENDA  Technologies & techniques used  ASP.NET MVC 3  Managed Extensibility Framework (MEF)  NuGet  Creating application components  Building an application  Conclusion  Further information  Q&ADECEMBER 12, 2011 | SLIDE 5
  5. 5. ASP.NET MVC 3  All the new stuff:  Razor view engine  Global Action Filters  Unobtrusive Ajax & Client Validation  Better Visual Studio tooling  And a very interesting one for doing LEGO development:  Better support for Dependency InjectionDECEMBER 12, 2011 | SLIDE 6
  6. 6. DEPENDENCY INJECTION? I need a var partA = “Part B” ! new PartA(new PartB()) Coming up! Me on a typical work dayDECEMBER 12, 2011 | SLIDE 7
  7. 7. DEPENDENCY INJECTION? I need a Let me There “Part B” ! you go! see... ContainerDECEMBER 12, 2011 | SLIDE 8
  8. 8. WHAT ABOUT ASP.NET MVC 3?  ASP.NET MVC 3 uses DependencyResolver  : IDependencyResolver  GetService()  GetServices()  Register it on application startDECEMBER 12, 2011 | SLIDE 9
  9. 9. WHAT ABOUT ASP.NET MVC 3?  ASP.NET MVC will / can query the IDependencyResolver for  Controllers  Value providers  View engines & view pages  Model binders  Filters  Controller activator  Model validators  View page activator  Model metadata  Check Brad Wilson’s blog for examples on all of these  http://bradwilson.typepad.com/blog/2010/07/service- location-pt1-introduction.htmlDECEMBER 12, 2011 | SLIDE 10
  10. 10. in ASP.NET MVC 3 DEPENDENCY INJECTIONDECEMBER 12, 2011 | SLIDE 11
  11. 11. MANAGED EXTENSIBILITY FRAMEWORK (MEF)  Cool as ICE: Import, Compose, Export [Import]IRule rule; MEF catalog [Export(typeof(IRule)] Let me There you go! see...DECEMBER 12, 2011 | SLIDE 12
  12. 12. MEF IN ASP.NET MVC 3  Build an IDependencyResolver  based on MEF container  Use  has a built-in IDependencyResolver  has a “Convention” model  is available on NuGet  mefcontrib.codeplex.comDECEMBER 12, 2011 | SLIDE 13
  13. 13. NUGET “NuGet is a Visual Studio extension that makes it easy to install and update open source libraries and tools in Visual Studio.” Publish your own packages + Create & use your own feedDECEMBER 12, 2011 | SLIDE 14
  14. 14. and finding it on NuGet USING MEFCONTRIBDECEMBER 12, 2011 | SLIDE 15
  15. 15. MEFCONTRIB.MVC3  Optional addition for  Adds some things to your application:  AppStart code that does the wiring  A CompositionDependencyResolver  Will check all assemblies in /bin  Will export everything : IController by conventionDECEMBER 12, 2011 | SLIDE 16
  16. 16. CONVENTIONS BASED MODEL public class MvcApplicationRegistry : PartRegistry { public MvcApplicationRegistry() { Scan(x => { x.Assembly(Assembly.GetExecutingAssembly()); x.Directory(AppDomain.CurrentDomain.BaseDirectory + "bin"); }); Part() .ForTypesAssignableFrom<IController>() .MakeNonShared() .ExportTypeAs<IController>() .ExportType() .Imports( // ... ); } }DECEMBER 12, 2011 | SLIDE 17
  17. 17. THIS ALL MAKES ME THINK...  Package company components using NuGet?  Distribute them in a custom feed?  Use ASP.NET MVC 3?  Wire everything with MEF & MefContrib?  Pure application Lego! Me, thinkingDECEMBER 12, 2011 | SLIDE 18
  18. 18. CREATING APPLICATION COMPONENTSDECEMBER 12, 2011 | SLIDE 19
  19. 19. WHAT’S NEXT?  Building it  MSBuild (or whatever! Nuget.exe is all that matters)  Hosting it Install-Package NuGet.Server  Create a NuGet server  Drop everything in a folder  Use a NaaS solution: www.myget.org  Using it  Reference the feed  Download & install components needed  Assemble using MEF (or another IoC)DECEMBER 12, 2011 | SLIDE 20
  20. 20. A QUICK COMMERCIAL PLUG  Create your own NuGet feed  Packages from official feed  Uploaded/pushed packages  No need to setup & maintain your own NuGet Server  Free! www.myget.orgDECEMBER 12, 2011 | SLIDE 21
  21. 21. CREATING A PRIVATE NUGET FEEDDECEMBER 12, 2011 | SLIDE 22
  22. 22. LET’S SEE IF WE CAN BUILD THIS... TPS Reports Cover Sheet Generator (ASP.NET MVC 3) Wired Domain layer Authentication Theme with MEFDomain.TpsReports AccountController Default theme Contracts Packaged as .nupkg And their implementations...DECEMBER 12, 2011 | SLIDE 23
  23. 23. Cover Sheet Generator BUILDING AN APPLICATIONDECEMBER 12, 2011 | SLIDE 24
  24. 24. CONCLUSION  You can build an app like a Lego set  Requires “bricks” (NuGet packages)  Requires “glue” (MEF / MefContrib / IoC)  Requires you to think in terms of components  Structure is key!  Not a best-practice architecture  Just something we toyed with on a project  Proved to work (for the customer)DECEMBER 12, 2011 | SLIDE 25
  25. 25. FURTHER INFORMATION  On the Internet:  www.nuget.org  www.myget.org  mefcontrib.codeplex.comDECEMBER 12, 2011 | SLIDE 26
  26. 26. THANK YOU FOR JOINING Me, having a questionDECEMBER 12, 2011 | SLIDE 27

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