How do I export and import application services with say MEF?

Posted by John Leidegren on Stack Overflow See other posts from Stack Overflow or by John Leidegren
Published on 2010-03-31T19:31:52Z Indexed on 2010/03/31 19:43 UTC
Read the original article Hit count: 345

Filed under:

MEF

|

dependency-injection

|

c#

I'm working with MEF right now, but the answer I'm looking for probably is irrelevant to MEF -- it's all dependency injection -- I'm just using MEF terminology as an example here.

Short background story, I read this article over at MSDN with focus on Composite Applications

In this figure there's three things, the shell, the application services and the modules. So that's a composite application.

alt text

What I don't fully get is the application services part. What's the service, what does it look like? How do you expose a service through a module and how do you consume a service from a different module?

I'd really like to see some neat small code examples, nothing fancy but something to illustrate how all this comes to life (the application services part).

© Stack Overflow or respective owner

Related posts about MEF

Can plugins loaded with MEF resolve their own internal dependencies with the same MEF container for

as seen on Stack Overflow - Search for 'Stack Overflow'
From my experimentation, I think the answer is "kind of", but I could have made a mistake. I have an application that loads appliance plugins with MEF. That part is working fine. Now let's say that my BlenderAppliance wants to resolve several of its dependencies with MEF, which each implement IApplianceFeature… >>> More
Question about mixing MEF and Unity

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm finally diving into Unity head first, and have run into my first real problem. I've been gradually changing some things in my app from being MEF-resolved to Unity-resolved. Everything went fine on the application side, but then I realized that my plugins were not being loaded. I started to… >>> More
Is it possible to mix MEF and Unity within a MEF-based plugin?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm finally diving into Unity head first, and have run into my first real problem. I've been gradually changing some things in my app from being MEF-resolved to Unity-resolved. Everything went fine on the application side, but then I realized that my plugins were not being loaded. I started to… >>> More
MEF CompositionInitializer for WPF

as seen on Reed Copsey - Search for 'Reed Copsey'
The Managed Extensibility Framework is an amazingly useful addition to the .NET Framework. I was very excited to see System.ComponentModel.Composition added to the core framework. Personally, I feel that MEF is one tool I’ve always been missing in my .NET development. Unfortunately, one perfect… >>> More
Creating extendible applications with MEF

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
Ever wanted to create an application that is easy to maintain and even more easy to extend? Then the following piece by Michael Hensen about Microsoft Extension Framework (MEF) could be a solution for your needs! With MEF, which is part of VS2010 own extensions platform, you can write parts of an… >>> More

Related posts about dependency-injection

How does dependecy injection increase coupling?

as seen on Programmers - Search for 'Programmers'
On the Wikipedia page on dependency injection, the disadvantages section tells us this: Dependency injection increases coupling by requiring the user of a subsystem to provide for the needs of that subsystem. with a link to an article against dependency injection. Dependency injection makes… >>> More
SubCut Scala Dependency Injection Framework

as seen on Gooder Code - Search for 'Gooder Code'
It’s no secret I am a fan of dependency injection. So I was happy to hear that Dick Wall of the Java Posse recently released a dependency injection framework for scala. Called SubCut, or Scala Uniquely Bound Classes Under Traits, the project is a ‘mix of service locator and dependency… >>> More
Dependency Injection Constructor Madness

as seen on Stack Overflow - Search for 'Stack Overflow'
I find that my constructors are starting to look like this: public MyClass(Container con, SomeClass1 obj1, SomeClass2, obj2.... ) with ever increasing parameter list. Since "Container" is my dependency injection container, why can't I just do this: public MyClass(Container con) for every class… >>> More
What are the downsides to using Dependency Injection?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to introduce DI as a pattern here at work and one of our lead developers would like to know: What - if any - are the downsides to using the Dependency Injection pattern? Note I'm looking here for an - if possible - exhaustive list, not a subjective discussion on the topic. >>> More
Using a Dependency Injection Container in an enterprise solution with multiple different configurati

as seen on Stack Overflow - Search for 'Stack Overflow'
Can anyone point me towards some good documentation / code examples on how best to manage the configuration of a DI container in a scenario where you need different configuations sets? We have a layered, distributed application that has multiple entry points (ie; a website, winforms app, office plugin… >>> More