Autofac - Decorators

One of the nice features of Autofac is the support for decorators.

A decorator class implements the same interface as the class it “wraps”. With a decorator you can add functionality to a class without changing it’s signature.

Let’s walk through an example step by step:

Here is the class and it’s corresponding interface I want to decorate:

Nothing special at the Autofac level yet:

Let’s now extend the behavior of this class through a decorator. What if we want to benchmark the execution time of the LogMessage() method? The decorator class should implement the same interface AND inject the interface at the same time:

Now we need to register the decorator in Autofac:

Remark: When using generics, it is also possible to register an open generic decorator. Therefore you need to use the RegisterGenericDecorator() overload

More information: https://autofaccn.readthedocs.io/en/latest/advanced/adapters-decorators.html

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