Every single view in my Spring 3 app has a set of attributes they can rely on. So the first line of every controller is something like: ControllerHelper.addDefaultModel(model, personManager, request); In there I'll add user object and full name retrieved from the database if person is logged in set of variables which are typically set once (e.g. imagesHost) set of languages a visitor can switch to
For a web page that exists, but for which a user does not have sufficient privileges (they are not logged in or do not belong to the proper user group), what is the proper HTTP response to serve? 401 Unauthorized? 403 Forbidden? Something else? What I've read on each so far isn't very clear on the difference between the two. What use cases are appropriate for each response?
There is a Java Void -- uppercase V-- reference type. The only situation I have ever seen it used is to parameterize Callables final Callable<Void> callable = new Callable<Void>() { public Void call() { foobar(); return null; } }; Are there any other uses for the Java Void reference type? Can it ever be assigned anything other than null? If yes, do you have examples?
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