On Aug 4, 2006, at 1:27 PM, Yang Lei wrote:
Thanks Jeremy,
Basically, what I need is something like WSDL4J , maybe a "SCDL4J",
which
contains the WSDL object model and a reader/writer. Tuscany already
has the
SCDL object model, also the loaders, I was able to manually
register loaders
(subclass of StAXElementLoader or AbstractLoader , itself a
subclass of
StAXElementLoader ) to StAXLoaderRegistry, and StAXLoaderRegistry
can load
SCDL and all the information loadable from the loaders.
Now I need to find a way NOT to do the registration manually.
The reason we need this feature is: before a sca pacakge is
installed into
Tuscany, I may want to expose some of the SCDL for user to do last
minute
updates,
This is really what the override mechanism is for in SCA. The
override mechanism was put in place to deal with this use case as
well as prohibit random edits at deployment time.
or some definition may trigger some other processing, e.g. some
binding extensions need J2EE side of code gen..
Can you explain why the code gen needs to be done, i.e. the specific
case, and why it must be done in the loader? If we need to do
bytecode manipulation such as AspectJ does (which we should probably
allow), we should probably allow a bytecode preprocessor to be
invoked prior to referencing a class in the runtime but I think you
are getting at something different.
This "SCDL4J" feature can
enable us do it.
So my question to your suggestion to start a runtime is:
1. is the runtime a runtimeContext?
2. how I can get the registry from the runtime? is the registry
StAXLoaderRegistry?
I tried to see from the class reference of StAXLoaderRegistry and
StAXLoaderRegistryImpl to find clue on how to get it, was not able
too.. All
the current test cases on loader are registering loader manually.
Appreciate your help.
Yang
On 8/4/06, Jeremy Boynes <[EMAIL PROTECTED]> wrote:
On Aug 4, 2006, at 10:33 AM, Yang Lei wrote:
> Hello,
>
> With M1 Driver, I can load a sca.module by creating a
> StAXLoaderRegistry and
> registering loaders into it. I wonder if Tuscany has a better way
> for me to
> get a StAXLoaderRegistry (or some other instance) fully loaded
> with all the
> loaders (Tuscany basics or other extensions ) so I can load any
> SCDL w/o
> worrying of what are the current supported loaders...
>
> The purpose of loading the SCDL is to read the defintion to
start some
> processing w/o creating the moduleContext and start it.
Yang, could you give a little more information on what you are trying
to do?
The loader infrastructure is designed to support deployment scenarios
where we need to create the runtime artifacts needed to host the
user's application. This needs a lot of additional infrastructure to
capture information not contained in the SCDL (for example,
introspecting Java classes, loading external files, ...). To do all
that you really need the runtime running (as it has the mechanisms
for loading extensions, introspection, resolving external artifacts
and so on). From the running runtime you can access the registry as a
service.
On the other hand, if you are in a tooling environment and are just
editing the SCDL, you may not need all that. If you're looking to
slurp in XML, edit it and write it out again, some form of XML editor
(e.g. vi) or modeler (e.g. EMF) may be more appropriate.
--
Jeremy
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