DI in Azure Functions

Question

I have some class libraries that I use in my ASP.NET Web API app that handle all my backend stuff e.g. CRUD operations to multiple databases like Azure SQL Database, Cosmos DB, etc.

I don't want to re-invent the wheel and able to use them in a new Azure Functions that I'm creating in Visual Studio 2017. All my repository methods use an interface. So, how will I implement dependency injection in my new Azure function?

I'm not seeing any support for DI but I'm a bit confused. It appears Azure Functions are based on the same SDK as WebJobs and I think last year Microsoft had started supporting DI in WebJobs - I know for sure because I implemented it using Ninject.

Is there way around this so that I can use my existing libraries in my new Azure Functions project?

Solution

I see these two techniques in addition to the service locator (anti)pattern. I asked the Azure Functions team for their comments as well.

https://blog.wille-zone.de/post/azure-functions-dependency-injection/

https://blog.wille-zone.de/post/azure-functions-proper-dependency-injection/