Introduction I have been evangelizing the use of IoC for a number of years. Frequently the newly converted ask the following two questions:
Which container to use? Which is fastest? My answer to the first is almost always the one you choose, and for the second question I refer them to Martin From’s IoCBattleweb page. I wont get into the reason for my answer to the first question in this post (I will save that for another day).
A few years ago I wrote Type Tracking Extension for Unity and Extending and Demonstrating the Type Tracking Extension for Unity, and while I have been using Autofac more, I felt this code was due for a slight update. Given the ease of creating a NuGet package for Caliburn.Micro.Autofac (see Introducing Caliburn.Micro.Autofac), I thought that I could give some Nuget love to the Type Tracking Extension for Unity.
What’s Changed Obviously, if I am working on some changes, I might as well bring the code up to date.
Recently, I have received a few requests for some changes and an example for my Type Tracking Extension for Unity. This post is to address those requests. Of course, all of the source code for this post is added to the GitHub project Unity Extensions.
Part One – Extension Methods for the Type Tracking Extension The number one request I have received, and my own number one issue with using the Type Tracking Extension, is the verbosity of each method call.
Edit: Updated link at GitHub.
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I have finally found an online code sharing site to post my open source code to – Hazware Unity Extensions on GitHub. I posted all of the source code for my Type Tracking Unity Extension there, and decided to follow the Ninject model for licensing – I dual licensed it as MS-PL and Apache, so go enjoy and help me make it better.
I have an IoC challenge that I am currently trying to work through. I have a series of classes that implement more than one interface, with the lifetime of the class needing to be a singleton, and I really don’t like the idea of falling back on custom instantiation code along with potentially custom lifetime management code to make this work.
Sound confusing? Here is the model I am trying for.
Edit: Source code posted to [Hazware Unity Extensions on GitHub]
My personal inversion of control container is Unity. However, I occasionally find myself looking for functionality from the other .NET IoC containers I have used, such as Ninject and Castle Windsor. Here is the code that came out from trying to solve this need.
I was working on some Unit of Work code for NHibernate and I found the need to query the container to check if a type was registered.