// ASP.NET Core is responsible for making the controllers,
// and for filling it its ctor parameters (dependency injection)
public HelloWorldController(IRequestCounter counter)
{
// this is the opposite of dependency injection - instantiating our dependencies right here
// "new is glue" - if your class says "new" in it, it's tightly coupled to some other class's
// specific implementation. harder to unit test that code, harder to evolve it later.
//_counter = new RequestCounter();
counter.IncrementRequestCount();
_counter = counter;
}
// GET: /HelloWorld/Welcome?name=Mark
public IActionResult Welcome(string name, [FromServices] IRequestCounter counter2)
{
// with FromServices attribute, you can get dependencies injected into specific action methods
ViewData["Message"] = "Hello" + name;
ViewData["NumTimes"] = _counter.TotalRequestCount;
ViewData["NumTimes2"] = counter2.TotalRequestCount;
return(View());
}
public ThreadMiddleware(RequestDelegate next, IRequestCounter counter, IConfiguration config)
{
_next = next;
_counter = counter;
_config = config;
}
