D365 中来自 IServiceProvider 的自定义服务

Question

We have recently starting building applications using D365. This is a shift from java where we used spring for dependency injection. It seems that IServiceProvider does dependency injection, but I haven't found any way to make it work with our home grown services.

We have code that looks like this:

public void Execute(IServiceProvider serviceProvider)
{
    IPluginExecutionContext context = (IPluginExecutionContext)serviceProvider.GetService(typeof(IPluginExecutionContext));
    IOrganizationServiceFactory factory = (IOrganizationServiceFactory)serviceProvider.GetService(typeof(IOrganizationServiceFactory));
    IOrganizationService service = factory.CreateOrganizationService(context.UserId);
     
    // ... do stuff ...
}

and I want to add in the following line:

MyHomeGrownService myHomeGrownService = (MyHomeGrownService )serviceProvider.GetService(typeof(MyHomeGrownService));

However, I don't know how to register MyHomeGrownService ; nor have I found much documentation on the topic.

Without proper dependency injection, developers have resorted to using new in the code which is makes proper unit tests near impossible.

How can I register custom services?

Answer 1

For now, I created a delegating IServiceProvider implementation which I use to wrap the given IServiceProvider in every plug-in call. That custom implementation is aware of our services and will create those when ask. Everything else, it delegates.

I tried to make the delegating IServiceProvider to be fast, but I have yet to try it in a live system, so I don't know how performant it is or isn't.