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From Davanum Srinivas <d...@yahoo.com>
Subject Re: AW: [RT] Cocoon and WSDL [was Re: AW [LONG]: [C2] Providing and using soap services]
Date Wed, 05 Sep 2001 15:22:19 GMT
Please count me in too. Though i might not be very active at the beginning.

Thanks,
dims

--- Matthew Langham <mlangham@sundn.de> wrote:
> Hi,
> 
> >>
> I thought of starting a separate project for that because parts of it
> are not tightly bound to Cocoon2. They can be use in general (XML-Schema
> -> java source according to JAXB). If some Axis people will join we can
> build up a toolset that satisfies all (and now my Avalon bias mind sees
> pluggable generator components :).
> <<
> 
> we would be interested in getting in on this - so count us in. Ovidiu and
> the HP team are using Cocoon for SOAP in their middleware - so they may be
> interested in this as well.
> 
> Matthew
> 
> --
> Open Source Group               sunShine - Lighting up e:Business
> =================================================================
> Matthew Langham, S&N AG, Klingenderstrasse 5, D-33100 Paderborn
> Tel: +49-5251-1581-30   [mlangham@sundn.de - http://www.sundn.de]
> =================================================================
> 
> 
> -----Ursprüngliche Nachricht-----
> Von: giacomo [mailto:giacomo@apache.org]
> Gesendet: Mittwoch, 5. September 2001 14:50
> An: cocoon-dev@xml.apache.org
> Betreff: [RT] Cocoon and WSDL [was Re: AW [LONG]: [C2] Providing and
> using soap services]
> 
> 
> On Fri, 11 May 2001, Matthew Langham wrote:
> 
> I have some time to give answers and vision on stuff I've marked
> as important since weeks.
> 
> > Hi Michael,
> >
> > I have been looking into Cocoon / SOAP for a few weeks now and this is
> what
> > I have done up to now:
> >
> > I built a transformer for a specific SOAP service (using Apache SOAP 2.1)
> > and integrated that into our Cocoon based platform. So basically Cocoon
> acts
> > as the SOAP client for that service. Take a look at
> > http://sunshine.sundn.de/sunshine/soapbid to see what I did.
> >
> > Using the SOAP interop stuff the SOAPbuilders have set up I was able to
> test
> > this against services built with Apache SOAP and also .NET, MS stuff and
> > even exotic versions such as EasySoap++ or HP SOAP. There are a few
> > interoperability issues between the different SOAP versions - but that is
> > more of a theme for the SOAPbuilders mailing list.
> >
> > Anyway that works fine and means you can uses Cocoon based solutions to
> > connect to SOAP services - if you write the corresponding transformer.
> >
> > A better solution (IMO) would allow you to access the WSDL description of
> > the service and generate the connector (transformer, whatever) from that.
> > This could be a one time process - done using XSP or XSL - or whatever.
> This
> > would then give you the Java class for a transformer (we like transformers
> > :-)) that you would then compile and hook into your Cocoon scenario.
> >
> > Of course a generic component that could access any service based on the
> > WSDL would be cool - but at the moment I dont see how that will work if
> the
> > service needs compound objects (such as an array of objects). Then you
> need
> > to set up your own serializers inside the SOAP client - and I dont think
> > that can be done in a generic fashion (but I maybe wrong on that).
> >
> > Using Cocoon as a server base for SOAP services is more difficult to
> > answer - one way would be to provide a service that accepts requests for
> > certain resources in Cocoon. The class then calls the resource inside
> Cocoon
> > (via http) and sends the response back to the SOAP client. I am currently
> > not sure why you would want to do that (you can access the resources
> > directly via http).
> >
> > Using Cocoon as a server that accepts SOAP envelopes and then passes them
> on
> > to components to be acted on would seem an alternative. However why would
> > one then not just use the same "server" to register the SOAP services
> > themselves.
> 
> This is what I'd like to start soon. Using WSDL as a base description
> for Cocoon web services.
> 
> The WSDL types section descibes objects which can be generated into java
> source code. These sources should be in accordance to the JAXB
> architecture (unfortunately the RI so far uses DTD without namespaces
> and is not usable for that). This results in marshallable/unmarshallable
> and extendable objects usable in the service logic parts and also can
> easily put down the pipeline.
> 
> The rest of the WSDL (message, portType, binding and service section)
> describe different objects. One part are objects I call connector and
> responder. Connectors are responsible to accept a request and transform
> the input into objects described in the type section and suitable for
> the services common to all bindings (SOAP, HTTP, etc.). Thus an ideal
> part for actions. Responders on the other side transforms WSDL type
> objects into a format suitable to be rendered as responses back to the
> requesting clients (to SOAP, HTTP, etc.). Some information can be used
> to generate the java interfaces for the services which average java
> programmer should be able to implement without knowing additional
> techniques from the XML domain. And finally sitemap snippets as well as
> XSP logicsheets could be generated because the WSDL contains almost all
> information needed for it.
> 
> Any comments?
> Any intrests in realizing this together?
> 
> Giacomo
> 
> >
> > >>
> > I could use some comment right now.
> > <<
> > There you go (for a start).
> >
> > Matthew Langham
> > Technical Director Open Source Group
> > s&n AG, Paderborn, Germany
> >
> > --
> > Open Source Group               sunShine - Lighting up e:Business
> > =================================================================
> > Matthew Langham, S&N AG, Klingenderstrasse 5, D-33100 Paderborn
> > Tel: +49-5251-1581-30   [mlangham@sundn.de - http://www.sundn.de]
> > =================================================================
> >
> >
> > -----Ursprüngliche Nachricht-----
> > Von: Michael Homeijer [mailto:M.Homeijer@devote.nl]
> > Gesendet: Freitag, 11. Mai 2001 13:03
> > An: 'cocoon-dev@xml.apache.org'
> > Betreff: [C2] Providing and using soap services
> >
> >
> > I am in the process of defining a reference architecture for my company
> (we
> > did a very successful project with C1) for e-business and web publishing
> > applications. Cocoon2 will play a role in this architecture.
> >
> > Until now we planned to use SOAP to access EJB beans, but with the new
> > Cocoon2 stuff, I think it would be great to build SOAP services and call
> > SOAP services with Cocoon technology. I'd like to implement a prototype
> for
> > this, but could use some help with it, basically with design decisions,
> and
> > if anybody is interested, with coding.
> > The main question is, how does this fit into the Cocoon architecture?
> >
> > - Calling soap services
> > I think it could be possible to have the syntax of this look like a
> standard
> > soap envelope and have it parsed by a logic sheet into java code:
> >
> > (Copied from xmethods.com, weather - temperature services, id = 8)
> > <SOAP-ENV:Envelope
> > xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
> > xmlns:xsi="http://www.w3.org/1999/XMLSchema-instance"
> > xmlns:xsd="http://www.w3.org/1999/XMLSchema">
> > <SOAP-ENV:Body>
> > <ns1:getTemp xmlns:ns1="urn:xmethods-Temperature"
> > SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
> > <zipcode xsi:type="xsd:string">94041</zipcode>
> > </ns1:getTemp>
> > </SOAP-ENV:Body>
> > </SOAP-ENV:Envelope>
> >
> > This should be wrapped in a call tag that defines the service to call, and
> > possible what to do with the response envelope (I cannot find a standard
> for
> > this tag, so I assume i must define one myself). I don't think the
> response
> > should automatically be output in XML, because in the case of using
> services
> > you probably want to add some java processing of the result. Options could
> > be to output the result directly or to store it in a variable.
> >
> > - Providing soap services
> > I am stuck with this one, should I write a soap generator (and if i do,
> > could i still use XSP to build the soap service) or should I write a logic
> > sheet that does some processing.
> > If cocoon is allready able to handle the soap request, could someone
> explain
> > this or send me some sample code?
> >
> > I could use some comment right now.
> >
> > TIA,
> > Michael
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: cocoon-dev-unsubscribe@xml.apache.org
> > For additional commands, email: cocoon-dev-help@xml.apache.org
> >
> 
=== message truncated ===


=====
Davanum Srinivas, JNI-FAQ Manager
http://www.jGuru.com/faq/JNI

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