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Fernando,
That was exactly the answer I was looking for!
Thanks so much.
-Tom
Fernando Salazar wrote:
>
> There is only 1 User object instance created. You have a reference to that
> instance in your local variable 'u'; you
> also stash a reference to the User object inside the session
> object. Although 'u' goes out of scope when the method ends,
> the session object still exists and holds a reference to your object, and
> so it will not be GC'ed.
>
> Now, is it thread-safe? Well, the session object maps to a specific
> browser client, identified by either a cookie or a value from an
> URL. Under normal conditions, 2 browsers will never map to the same
> session object, so there should never be 2 simultaneous requests against 1
> session, and by extension never 2 simultaneous requests accessing the same
> User object instance. If you were paranoid, you could wrap the Validate
> call with a synchronize on u, for example:
>
> synchronize( u ) {
> Validate u
> }
>
> but like I said, you would never need to do this unless something weird was
> happening -- like someone forging URLs and trolling for session IDs.
>
> Hope this helps ...
>
> - Fernando
>
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