Google Cloud Endpoints v2: Any way to inject User?

Question

I'm new to Google Cloud Endpoints and I am currently looking for an alternate way to receive the User method parameter.

In the documentation on Authenticating Users, the only way of receiving information about the user that is shown is to receive an instance com.google.api.server.spi.auth.common.User as a method parameter.

There appears to be no annotation I can use to request this principle elsewhere other than directly on the endpoint method. This can obviously be made to work, but I am very interested in the following scenario:

/*
 * in an injection provider
 */
CustomUserClass getUser(@EndpointsUser User user) throws UnauthorizedException{
    if(user == null) throw new UnauthorizedException("If we're requesting the user be injected, we should reject unauthenticated requests");
    //datastore code to lookup and return my representation of a user
}

/*
 * in the endpoint class
 */
@Inject
CustomUserClass userProfile;

//endpoint methods here

Does anyone know how to do the above? I realize I could simply move this logic into my endpoint class, but this is a case of cross-cutting concerns and is not only bad programming, but less easily tested.

Yes, I know I can role my own solution (pun intended), but cloud endpoints is supposed to make this kind of thing easy, isn't it?

Answer 1

This is currently not possible, as Guice use cases weren't common when the frameworks were written. You can file a feature request.