Managed Extensibility Framework

by Andriy Buday

Outline Extensibility What is MEF? Core concepts

Import + Export = Composed DEMO 1: Hello MEF World Demo

Components of MEF How to compose? Major Features

DEMO 2: Advanced Features Demo

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Let see… will we get what we want…

Extensibility

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What is MEF?

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Core ConceptsImport + Export = Composed

Import Export

Composed

“I need” “I have”

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DEMO 1: “Hello MEF World”

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Core ConceptsComponents of MEF

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Core ConceptsHow to compose?

ContainerBatch

PartCompose

CompositionContainer Wiring “surface” where magic happens

CompositionBatch Contains the parts to be wired together

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Core ConceptsMajor Features Lazy Imports Exports and Metadata Catalogs

Type catalog – explicit list of typesAssembly catalog – attributed types in an assemblyDirectory catalog – based on directory searchAggregate catalog – allows combining catalogs

Recomposition Querying

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DEMO 2: Advanced features demo

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@andriybuday

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andriybuday@gmail.com

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Links My article:

http://andriybuday.blogspot.com/2010/01/managed-extensibility-framework.html

MEF Home page: http://www.codeplex.com/MEF

Other Links: Metadata and why being Lazy is a good thing -

http://codebetter.com/blogs/glenn.block/archive/2009/12/04/building-hello-mef-part-ii-metadata-and-why-being-lazy-is-a-good-thing.aspx

Diagnosing MEF - http://blogs.msdn.com/b/nblumhardt/archive/2009/08/28/analyze-mef-assemblies-from-the-command-line.aspx

MSDN MEF Overview - http://msdn.microsoft.com/en-us/library/dd460648%28VS.100%29.aspx

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