Hi Bjello,
I think Lance was onto the best ideas. The easiest would be to create
a Tapestry service for creating your Cayenne objects (pseudo-code):
public class TapestryCayenneService
{
@Inject @Symbol(value="...") ...
public Foo newFoo(ObjectContext oc)
{
Foo foo = oc.newObject(Foo.class);
// Set values in foo from injected symbols...
return foo;
}
public Bar newFoo(ObjectContext oc)
{
Bar bar = oc.newObject(Bar.class);
// Set values in bar from injected symbols...
return bar;
}
// Or if using the CayenneFilter and want the option of storing
your objects in the thread context:
public Foo newFoo()
{
return newFoo(BaseContext.getThreadObjectContext());
}
...
}
Then register the TapestryCayenneService in your AppModule.
The other approach would be to use a servlet filter, which is much
more complex. You'd probably have to register a thread local to bind
your Tapestry symbol values into and then retrieve them inside your
CayenneDataObject subclasses (Foo, Bar, etc) using a lifecycle
callback. I think this approach would be more work and more magic
(harder to implement and understand/maintain later), but if you would
like to explore this avenue instead of a Tapestry service, just ask.
mrg
PS. Which version of Cayenne are you using?
PPS. Don't use CayenneService as a DAO for deleting/saving, either.
On Tue, Oct 30, 2012 at 11:48 AM, <devnull2...@gmx.de> wrote:
> Hi,
>
> I've got a properties file that gets added with contributeSymbolSource(...)
> in AppModule and injection of the values with @Inject
> @Symbol(value="myProperty") works well. Unfortunately, it doesn't work in
> classes that are subclasses of CayenneDataObject (I use cayenne as OR
> mapper), since these aren't page, component, mixin or service classes.
>
> So I inject the value that I need in four different page classes that don't
> need to know about this internal value, and use it as parameter when I call
> some methods of the cayenne entity classes that need this value.
>
> Is there another way or a better way to access symbols from POJO classes?
> I can't use a constant because the value in the properties file is for the
> production system but gets overridden in the eclipse launch config during
> development.
>
>
> Cheers,
> Bjello
>
>
>
>
>
>
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