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From Andrey Razumovsky <razumovsky.and...@gmail.com>
Subject Re: jdbc connection
Date Tue, 06 Apr 2010 17:13:15 GMT
CayenneContext is used for three-tier Cayenne (ROP) [1]. This is a very
interesting and major feature of Cayenne. No others currently.. I've thought
of GWTCayenneContext for GWT client side, but this is quite different
concept

[1]
http://cayenne.apache.org/doc30/remote-object-persistence-introduction.html

2010/4/6 <MGargano@escholar.com>

> Out of mostly curiosity... What could the other contexts possibly be?  I
> see BaseContext, which is there for specific implementations to inherit
> from, and CayenneContext, which I don't really understand.  Would like an
> XMLContext or BinaryFileContext be examples of contexts in the future?
>
> -Mike
>
>
>
> From:
> Michael Gentry <mgentry@masslight.net>
> To:
> user@cayenne.apache.org
> Date:
> 04/05/2010 05:02 PM
> Subject:
> Re: jdbc connection
>
>
>
> I don't know if this will always be the case, but 3.0 (in
> WebApplicationContextFilter and ServletUtil) creates a DataContext:
>
>            DataContext ctxt = (DataContext)
> session.getAttribute(DATA_CONTEXT_KEY);
>
>            if (ctxt == null) {
>                ctxt = DataContext.createDataContext();
>                session.setAttribute(ServletUtil.DATA_CONTEXT_KEY, ctxt);
>            }
>
>            return ctxt;
>
> Maybe in 3.1 or greater this will change, but currently it should be
> safe to cast to a DataContext.
>
> mrg
>
>
> On Mon, Apr 5, 2010 at 4:49 PM,  <MGargano@escholar.com> wrote:
> > Thanks guys.  Will it always be safe to cast
> > BaseContext.getThreadObjectContext() to DataContext?
> >
> > -Mike
> >
> >
> >
> >
> > From:
> > Michael Gentry <mgentry@masslight.net>
> > To:
> > user@cayenne.apache.org
> > Date:
> > 04/05/2010 04:46 PM
> > Subject:
> > Re: jdbc connection
> >
> >
> >
> >
>
> dataContext.getParentDataDomain().getNode("foo").getDataSource().getConnection()
> > returns the Connection, I think.  Replace "foo" with the name of your
> > DataNode.
> >
> > mrg
> >
> > On Mon, Apr 5, 2010 at 4:26 PM,  <MGargano@escholar.com> wrote:
> >> What's the best way to get a direct handle to a jdbc connection in your
> >> underlying pool.  It looked like getting it straight from DataNode was
> > the
> >> way to go, but then how do I get to my DataNode?  :)  Thanks.
> >>
> >> -Mike
> >>
> >
> >
> >
>
>
>


-- 
Andrey

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