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Managed Extensibility Framework

Mahender Sarangam, a Senior Software Engineer with 5 years of experience, specializing in .NET Technologies. MCTS certified in Web Technologies. Expertise in C#, ASP.NET, AJAX, LINQ, Silverlight, WPF, WCF, SQL Server, TFS, and SharePoint.

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Managed Extensibility Framework

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  1. Managed Extensibility Framework Mahender Senior Software Engineer United Health Group

  2. Mahender Sarangam • Having 5 years of experience on .NET Technologies. Working as a Senior Software Engineer in United Health Group (UHG India Information Service Ltd.). Worked with Big Firms like Deloitte Consulting & Wipro Technology. • Got Technical Acquaintance on Technologies like C#, ASP.NET,AJAX, LINQ, Silverlight, WPF,WCF ,SQL Server, Team Foundation Server(TFS) and SharePoint Technology. • MCTS Certified in Web Technologies. • Blog : http://Msarangam.wordpress.com

  3. Dependency Injection • Idea of the Dependency Injection is to have a separate object, an assembler, that populates a field in the listener class with an appropriate implementation for the finder interface. • interface injection • setter injection • constructor injection. • Dependency injection is a style of object configuration in which an objects fields and collaborators are set by an external entity. • Dependency injection is an alternative to having the object configure itself . • Loose coupling promotes greater reusability, easier maintainability, and allows you to easily provide "mock" objects in place of services instances

  4. Responsibilities • Instantiation, Configuration and Disposal • Life cycle management is one of the responsibilities dependency containers like Singleton • For .NET :- Castle Windsor, Spring.NET, PicoContainer.NET, Puzzle .NFactory ,Unity Benefits: • Reduced Dependencies • Reduced Dependency Carrying • More Reusable Code • More Testable Code • More Readable Code

  5. MEF

  6. MEF • The Managed Extensibility Framework (or MEF for short) simplifies the creation of extensible applications. • Plug-in components to an already running application • Discovery and Composition capabilities that you can leverage to load application extensions. • Benefits • Dependency injection and inversion of control. • Lifetime management • Configuration • Import Many • Modularity • Extensibility • Strongly Typed

  7. System.ComponentModel.Composition.dll -> Assembly come part of .NET Framework 4.0 • If the version of application is < .NET 4.0, Download MEF Zip file from codeplex site • Here are MEF Jargon • Part • Catalog • Contract • Import • Export • Compose

  8. Steps for MEF • Create Import • Create Export attribute of same type of Import • Create instance of Assembly Catalog • Composite Container to Compose

  9. Catlogs • Assembly Catalog • Directory Catalog • Directory Catalog • Type Catalog • DeploymentCatalog - Silverlight only

  10. Thank you

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