Roughly:
interface MethodFactory_v0_8
{
QueueDeclare createQueueDeclareMethod(v8 args...);
... more
}
interface MethodFactory_v1_0
{
QueueDeclare createQueueDeclareMethod(v10 args...);
... more
}
interface QueueInvoker
{
queueDeclare(AMQPSession context, QueueDeclare qd);
}
interface QueueDeclare
{
// Fully opaque interface.
// Or expose args that we are sure will be common amongst all versions,
e.g.
String getQueueName();
}
class QueueDeclare_v10 implements QueueDeclare, Struct
{ ... }
class QueueDeclare_v8 implements QueueDeclare
{ ... }
class QueueInvoker_v8 implements QueueInvoker
{
queueDeclare(AMQPSession context, QueueDeclare qd)
{
// Ensure context and command are v8
if (!(context instanceof AMQPSession_v8) || !(qd instanceof
QueueDeclare_v8))
{
throw new IllegalArgumentException();
}
}
}
Similarly for QueueInvoker_v10
On 01/08/07, Rupert Smith <[EMAIL PROTECTED]> wrote:
>
> I think it would be best not to 'reveal' Struct in the API itself.
> Partially or fully opaque method wrappers and a versioned factories for
> creating the method calls would hide the version specific implementations. I
> think I will have to post an example to explain what I mean by that...
>
> On 01/08/07, Robert Godfrey <[EMAIL PROTECTED]> wrote:
> >
> > Just to be clear... the multi version support and references to
> > "structs" is
> > about 0-10 and onwards... This design is based on the new protocol
> > features
> > that are evolving as part of 0-10 (e.g. tracks/sub-channels). Backward
> > compatability with versions prior to 0-10 will be have to be achieved
> > some
> > other way... yes?
> >
> > -- Rob
> >
> > On 31/07/07, Rajith Attapattu <[EMAIL PROTECTED]> wrote:
> > >
> > > Hi Folks,
> > >
> > > The following link contains the design concepts behind the new client
> > (and
> > > the java broker)
> > >
> > >
> > http://cwiki.apache.org/confluence/display/qpid/Restructuring+Java+Broker+and+Client+Design
> > > This is an evolving document and is intended as useful base to start
> > work.
> > >
> > > Hopefully this will help everybody during the discussions.
> > >
> > > Regards,
> > >
> > > Rajith
> > >
> >
>
>
