Re: [wsrp-comment] a few questions

[Rich Thompson <richt2@us.ibm.com>]

Answers intertwined with <rt>



                                                                                                                   
                      Timo Tetzlaf                                                                                 
                      <Timo.Tetzlaf@met        To:       "'wsrp-comment@lists.oasis-open.org'"                     
                      ris.de>                   <wsrp-comment@lists.oasis-open.org>                                
                                               cc:                                                                 
                      11/12/2002 06:41         Subject:  [wsrp-comment] a few questions                            
                      AM                                                                                           
                                                                                                                   
                                                                                                                   



Hi,

Again, I have some questions regard to WSIA - WSRP Core Specification v0.8.

1.) In section 11.7, Handle Type, you describe that Handle extends String.
But String is 'final' and so it is impossible
     to extend from it. I am correct or do I understand something wrong ?
<rt>
String is a final class in Java. In the document world, string is a simple
type with various facets. The length restriction of Handles would be
setting one of these facets. Our current WSDL does not use this form
because it breaks the JAX-RPC tooling due to the issue you raise about
String being a final class. The Axis tooling accepted the definition
(Handle became a class that had a string member), but ignored the
additional restriction. I don't remember if .Net did any better in handling
the refined definition.
</rt>

2.) Is there any reference implementation available, that I can use for my
degree dissertation ?
     Any sourcecoude I an use (have not be compileable) is helpfully to see
how it will work.
<rt>
There are implementations that member companies have in house and a stated
intent by IBM to contribute source to an Apache project early next year.
</rt>

3.) Does my assumption is right, if I think that the Producer-Service
(which support getServiceDescription(), getEntityDescripton() and so on)
     is a kind of Manager who manage all Entities in one scope ?
<rt>
yes ... and that scope is either the Consumer's registration (when
registration is supported) or the Producer (when registration is not
supported).
</rt>
     So I have to announce all Entity which shall be visible on
getServiceDescription() ?
<rt>
The Producer announces all available entities given the supplied
registration and userContext.
</rt>

4.) In regard to my degree dissertation, I want to implement a small
example WSRP-Service using the existing specification.
     Which existing frameworks can I use, to simplify this ? Till now I am
using APACHE-AXIS (for web service), and want to
     use Cocoon or JSF (for transforming XML in any other markup I want to
use in my entity) and EJB for persistence.
<rt>
Using Axis for the web service interface that then provides a container for
entities using particular support classes (Cocoon, JSF and EJB being good
examples) is a very reasonable approach. If you wish to avoid the
container, you could also write the Producer to offer only a single entity
type. If you wish to avoid writing the persistence, you could use the
options for pushing persistent information to the Consumer.
</rt>

Thanks,

Timo Tetzlaf