Mailing-List: contact dev-help@river.apache.org; run by ezmlm
Precedence: bulk
Reply-To: dev@river.apache.org
Received-SPF: pass (nike.apache.org: local policy includes SPF record at
 spf.trusted-forwarder.org)
MIME-Version: 1.0
In-Reply-To: <1393799620.1979.5.camel@Nokia-N900>
References: <5313816B.9030703@xpro.biz>
	<1393799620.1979.5.camel@Nokia-N900>
Date: Mon, 3 Mar 2014 07:08:50 +0100
Message-ID: 
 <CAL2DxM4dy+PBuoKR=FMWsmaoyS_LjSRhM4BzBqxFUFP30M9Dig@mail.gmail.com>
Subject: Re: River-436 - need some explanation of preferred class provider
From: =?UTF-8?B?TWljaGHFgiBLxYJlY3plaw==?= <michal.kleczek@xpro.biz>
To: dev@river.apache.org
Content-Type: multipart/alternative; boundary=001a11c1c3480d0ac704f3ad9fea

--001a11c1c3480d0ac704f3ad9fea
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

But it will also be loaded by WrapperProxy ClassLoader, since it is
preferred there. So it will end up with ClassCastException, right?

Regards,
Michal

If Util is installed locally, it will only be loaded by the application
ClassLoader, since it isn't preferred.

Peter.

----- Original message -----
> Folks,
> while woking on the River-436 patch proposal I've came across the
> scenario that I am not sure how to handle:
>
> Utility service:
> //inteface is NOT preferred
> interface Util {...}
> //class IS preferred
> class UtilProxy implements Util {}
>
> Wrapper service:
> //NOT preferred
> interface Wrapper {}
> //preferred
> class WrapperProxy implements Serializable{
>      //initialized with Util impl from a lookup service
>      private Util util;
> }
>
> Wrapper service codebase includes Util interface but it is _preferred_.
>
> Would deserialization of WrapperProxy end with ClassCastException?
>  From what I understand UtilProxy is annotated with its codebase. When
> deserializing UtilProxy a ClassLoader is going to be created with parent
> set to TCCL. It means Util interface is going to be loaded twice by two
> ClassLoaders - one for WrapperProxy codebase and another for UtilProxy
> codebase.
>
> Am I correct?
> And if so: is it desired behavior?
>
> Regards,
>
> --
> Micha=C5=82 K=C5=82eczek
> XPro Quality Matters
> http://www.xpro.biz
>

--001a11c1c3480d0ac704f3ad9fea--