Clean architecture for velocity-templatized services

[mdutoo]

We've hacked FraSCAti's implementation.velocity twice in order to provide exchange templates (built automatically from correlated suggestions) as SOAP services, as described in #73 "Message API : store and reuse for replay & simulation" (see details there) :

• hacked ProxyImplementationVelocity using rather the nth call argument as the template path where n is the value of a dedicated pathArgIndex SCA property. See https://github.com/easysoa/EasySOA/blob/master/easysoa-proxy/easysoa-proxy-core/easysoa-proxy-core-httpdiscoveryproxy/src/main/java/org/ow2/frascati/implementation/velocity/ProxyImplementationVelocity.java
• hacked FraSCAti's ServletImplementationVelocity, so "/" returns an HTML list of links to WSDLs corresponding to SOAP services built on autogenerated exchange templates, "myTemplateStore.wsdl" returns the corresponding generated WSDL, other POST requests implement said SOAP services. See https://github.com/easysoa/EasySOA/blob/master/easysoa-proxy/easysoa-proxy-core/easysoa-proxy-core-httpdiscoveryproxy/src/main/java/org/ow2/frascati/implementation/velocity/ServletImplementationVelocity.java

=> Questions to INRIA :

• could we have done that without hacking, especially how to add another implementation kind to implementation.velocity ? Is that also possible in others ex. implementation.java ??
• could some be contributed to FraSCAti (ex. the first one), how ? If we wanted to commit it ourselves in FraSCAti how would / could we ?
• can this kind of feature (simulating SOAP services, "meta" service, "proxy" implementation) be done better (notably using FraSCAti capabilities), how ? (this is also interesting for providing Nuxeo Content Automation as SOAP, see discussion Nuxeo and SOAP).

Then provide it to INRIA as basis of a (possibly new implementation) contribution & for patches, improvements and feedback on how to develop such things ("meta" service, "proxy" implementation... all also ex. for providing Nuxeo Content Automation as SOAP) for FraSCAti.

[philippemerle]

I read your patches and I don't understand why you need to patch .

I think you could simply write your own Servlet SCA components to do the same.

Have a look at:

• http://websvn.ow2.org/listing.php?repname=frascati&path=%2Ftrunk%2Fexamples%2Fhelloworld-servlet%2F
• http://websvn.ow2.org/filedetails.php?repname=frascati&path=%2Ftrunk%2Fexamples%2Fhelloworld-servlet%2Fsrc%2Fmain%2Fresources%2Fhelloworld-servlet.composite
• http://websvn.ow2.org/filedetails.php?repname=frascati&path=%2Ftrunk%2Fexamples%2Fhelloworld-servlet%2Fsrc%2Fmain%2Fjava%2Forg%2Fow2%2Ffrascati%2Fexamples%2Fhelloworld%2Fservlet%2FHelloWorldHttpServlet.java

But perhaps I miss some important thing in your patches.