Learning Functional Programming in Go

func main()

Now, let's go through the main() function:

func main() {   gcpi, err := infrastructure.GetGcpInteractor()   HandlePanic(errors.Wrap(err, "unable to get gcp interactor"))   li, err := infrastructure.GetLocalInteractor()   HandlePanic(errors.Wrap(err, "unable to get local interactor"))   wsh = WebserviceHandler{}   wsh.GcpInteractor = gcpi   wsh.LocalInteractor = li

We inject both our interactors into our web service handler, which allows our admin user to manipulate our repositories via our public web service APIs, for example, /list-source-buckets.

Note that DI occurs at object creation time. Contrast DI with parameterized functions or the use of a context--that contains all pertinent information for a single function invocation—that can be ...