Of course Cayenne doesn't keep using memory without limit. If you look in
the project properties in the modeler, you'll see a section "Cache
Configuration" where you can specify the Max. Number of Objects.
----- Original Message -----
From: "Oscar Picasso" <oscgoogl..ahoo.com>
To: <cayenne-use..bjectstyle.org>
Sent: Saturday, November 05, 2005 3:32 PM
Subject: Re: Cayenne, Tapestry and DataContext
> > I am also learning Cayenne and Tapestry 4 at the moment. The application
> > I am currently on has one DataContext in my ASO application scope class.
>
> What is an ASO application?
>
> > I am not sure what you mean by DataContext growth by retrieving from it.
> > I guess growth can be controlled.
>
> Lets's say I have
> Person
> {
> Person mam;
> Person dad;
> List<Person> children;
> }
>
> // Actually execute some query with the data context.
> Person albert = dao.findByName("Albert")
>
> At this point, my understanding is that albert.children are not in memory.
> Then if i do something like:
>
> for(Person child: children)
> {
> do somthing with child;
> }
>
> The children are loaded in memory, if I keep looking for the children of
the
> children and so on, each time more persons are loaded in memory.
>
> Am I right?
>
> If that the case, for some big potential graphs, at some point you end up
with
> thousands or millions of Objects/Persons in memory if you use the same
> DataContext.
>
> I don't know how Cayenne deals with this situation. Does it discard the
least
> recently used Objects, does it perform some kind of caching, or do we need
to
> keep track of the Object creation to avoid a potential
OutOfMemoryException.
>
> Oscar
>
>
>
>
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