RE: ModelLifetime.discard() issue

> From: Trebor Carpenter [mailto:[email protected]]
> 
> Hi,

Hi!

> I'm using maverick 2.2.0 and running into a small inconsistency in
> behavior. My controllers generally derive from FormBeanUser, and my
> formBeans all implement ModelLifetime. The problem I'm seeing is that
if
> I do a forward (using a null view type) from one controller to
another,
> the second controller's formBean gets discard() called twice and the
> first controller's formBean does not get discard() called at all.
> 
> I'm not sure what additional details would be useful to troubleshoot
> this.

Do you have the "reuseMaverickContext" flag turned on?  I can see how
this would cause trouble with null views.

The basic logic (in CommandBase) is:

try
{
    execute the controller
    get the model from the context and store in local variable
    execute the view
}
finally
{
    call model.discard()
}

This works fine as long as the forward (and maverick context recycling)
occurs during view processing because we've already gotten a hold of the
model before the recursion.  However, when the forward occurs in the
controller (as with a null view), we're doomed - the model gets replaced
in the context before we can get a reference.

I'm not sure there is a good solution to this problem.  Why do you need
"reuseMaverickContext" to be turned on?  I've never really liked this
flag.

> Incidentally, this is my third project using Maverick. I have a very
> small framework of classes that tie together Maverick, Formproc,
TopLink
> and I use Velocity for the view layer. Initially I had a very
difficult
> time persuading my colleagues that this was the way to go for us
("we've
> never heard of it. jsp is standard! struts is standard!") But since
then
> two of them have also used it and are now full converts raving to me
how
> much they love Maverick and love Velocity. Obviously not the right
> combination for all problems but near perfect in our case. Thanks for
a
> great framework!

Thanks, we love hearing this stuff :)

Jeff Schnitzer
[email protected]


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