Hi Eran,

I agree about the custom MEPs and using reflection. What I would like
to clarify is whether the raw XML message receiver not only uses
reflection, but always expect a certain method signature in the
reflected classes, is that so? Suppose I have some hashtable with
mappings of service operation => actual method signature. I.e my
operation is sayHello but my actual implementation would need to
invoke SAY_HELLO(...) . Then , as far as i understood from the talk
above, the Raw XML Message receiver would fail since the
reflection-based search in findOperation() would not succeed. Thanks

Regards,
Angel

On 1/14/07, comain <[EMAIL PROTECTED]> wrote:


Yes,it works just as perfect as you said. That is really cool.

However, if we are using POJO based web services with RPC MR (as the
quickstart example), it works with a lot of reflections indeed.  As a
developer, since I konw
little about WSDL, the way I prefer is to write POJOs with my own business
logic first, then deploy it as a ws with a default service.xml. In this
case(maybe
the common case), does Axis2 has no way but using reflections all around?

If this is a problem, we may work around in the following ways:

A possible work around is, the developer first write its own
skeleton(dummy), then using java2wsdl to generate wsdl for him, then using
code gen with ADB to generate effective
sevice skeleton, after which developer now adding his business logic.

Or change the code gen module not using WSDL information, but Service
Classes directly(Since wsdl can generate from service class). In this case,
developer need not to
provide wsdl before write his service, but write the service with his own
will, then using the ADB code gen to generate necessay auxiliary classes
directly.

If this is not a problem, can you kindly point out how does axis2 elegantly
handle this case?

Great thanks, Eran.


 ________________________________

comain
2007-01-14
 ________________________________

发件人: Eran Chinthaka
发送时间: 2007-01-14 13:17:51
收件人: [email protected]
抄送:
主题: Re: Custom Message Receiver use cases



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Comain Chen wrote:
> Hi, Eran
>
> I am quite interested in your 2nd reason.
>
> However, it seems that you can only avoid using
java reflection during
> operation routing. Before it starts to invoke the
specific operation, it
> has to deserialize the XML document into
corresponding operation
> parameter objetcs, which will use Java
reflection(If you use any binding
> frameworks, such as ADB, JAXB, etc.), and is
more performance critical.

Well, we do not do that, at least in ADB.

The ADB data objects, that are code gen'ed directly works
on StAX. What
you have, when you are just about to de-serialize, is
a StAX reader,
from the input stream. ADB is designed to work with
StAX. IIRC, we do
not need reflection in this case.

> Of course, if you decide to write your own data
binding with RawXMLMR,
> you can still avoid this with a lot of painful work.


I totally agree with you. But most people do not want
to get in to the
hazel of writing yet another data binding framework.
We know, from
experience, how difficult it was :).
And 95% of the people, in my guess, like to work with
java objects, than
with raw XML.

- -- Chinthaka
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