Hook to be automatically invoked during runtime?

[justinyoo]

Is your question related to a specific version? If so, please specify:

both v2 and v3, and static and IoC

What language does your question apply to? (e.g. C#, JavaScript, Java, All)

C#

Question

I wonder whether there is a sort of hook interface like IFunctionHook or so, so that we can implement the hook to be invoked while the Functions runtime boots up. Do we have such kind? For example:

public interface IFunctionHook
{
    void Run();
}

public class MyHookClass : IFunctionHook
{
    public void Run()
    {
        // Do Something
    }
}

And, somewhere in the functions host runtime has...

var assembly = Assembly.GetExecutingAssembly();
var types = assembly.GetTypes()
                    .Where(p => p.GetInterface("IFunctionHook", ignoreCase: true) != null);
foreach (var type in types)
{
    var instance = Activator.CreateInstance(type);
    (instance as IFunctionHook).Run();
}

While the Function rumtime boots up, it searches any class implementing IFunctionHook and invokes the Run() method like above.

[fabiocav]

@justinyoo the functionality you're describing is what is exposed with the Function Startup behavior. Can you provide more information on what you're trying to do and where the existing extensibility falls short?

[justinyoo]

@fabiocav This feature is for the Open API extension. It has already been implemented for the in-proc worker, based on the directions we had a while ago.

This issue has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for 4 days. It will be closed if no further activity occurs within 3 days of this comment.