[cddlm] Draft of deployment API

[Steve Loughran]

This is the version of the deployment API I'd like to discuss on 
wednesday. It is not ready yet, because the WSDL is still unfinished. 
Note the lack of faults in the typedefs, and the new WSDL that uses all 
these types is still to be done. I need to build up a system that 
processes WSRF to make sure that the API is actually valid.

But the text of the deployment API is what I intend to do, so that's 
what we can review. Notice the limited file upload mechanism I've 
implemented, which leads to a use pattern of


system=portal.create(options)
length=system.addFile("nap:chemical+brothers","application/binary",databaseRpm);
assert(length==databaseRpm.length());
system.init(jsdl,deploymentDescriptor);
system.run();

That is, you dont pass up the JSDL or deployment descriptor at create 
time, only when you initialise it. And you can add files before you 
initialise it, so their URIs are resolvable during initialisation.

For this to work we need to mandate that URIs of added files are 
resolved in deployment descriptor (and jsdl descriptor) processing 
before going out to the rest of the network; a small bit of XML parser 
configuration.

To actually use the URIs in apps is another issue; I dont want to even 
think that actual running apps in their own processes have access to 
this uri->file mapping. We'll need a component that copies stuff from 
remote URIs to local filesystem (which, for this uploaded stuff, may be 
just a copy, not a download)

I'm offline for the next 24 hours, but will speak to you all on Wednesday.

-steve

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