[teiid-dev] Cdk Plugin - Export Feature added

[Sanjay Chaudhuri]

Hi Michael,

Using loopback classes was just a start to get the ball rolling in terms of
having something. I picked that up to get started on with. It will be
replaced later with more generic template which Ramesh is working on. I am
not too technical with Teiid-Cdk connector internals, so will move forward
with whatever serves the best use-cases from you guys. And then probably we
need to use the Eclipse/JET templates engines.

I remember having the same problem with compilation because could not get
hold off FakeMetadataFactory. Ramesh had sent it to me; I guess I missed
checking in that; will do it soon.

Thanks

Sanjay
On Tue, Dec 1, 2009 at 2:54 PM, Michael Walker <mwalker at redhat.com> wrote:

> Cool stuff guys!
>
> I just caught up on this thread, downloaded the CDK and gave it a spin. I
> was able to build the basic project and produce the RAR, neat! This will be
> a great way to encourage custom connector development, and I intend to use
> it for future work.
>
> I have a few questions and thoughts about it.
>
> 1. Using the loopback connector code as the template may have some
> drawbacks, namely:
> a. If the API changes, we have to update (or re-copy) the template code
> (perhaps this is automated already?).
> b. The developer will have to remove most of the code specific to loopback,
> since it wouldn't be useful in any other legitimate connector. These changes
> will, of course, break the loopback-specific tests as well, which will also
> require effort to fix. This adds up to extra, unnecessary work for the
> developer.
> c. It includes lots of coding assumptions that the developer probably
> wouldn't want initially. For example, the developer is probably going to
> want all capabilities set to false initially, and will add support for
> capabilities and functions over time.
> d. It doesn't use connection pooling, which should arguably be something
> included in the boilerplate code (via @ConnectionPooling annotation).
> e. As Ramesh mentioned earlier in the thread, it generates classes called
> "LoopbackConnection", etc., when the developer really wants
> "MyCustomConnection", where MyCustom is the name of their project.
>
> As an alternative, did we consider using Eclipse's built-in mechanism for
> building boilerplate classes based on the interfaces of the API, which we
> could then modify as needed to create a more generic template?
>
> This would allow forward-compatibility with any future changes to the API.
> It would produce a simpler set of classes without all the loopback stuff in
> there. We could still define a good set of tests based on the API, not
> specific to loopback and the results it returns. This might add up to a more
> straightforward developer experience.
>
> 2. I wasn't able to run the JUnit tests against the newly-produced
> connector; does this work for others? It looks like we are missing
> com.metamatrix.query.unittest.FakeMetadataFactory. Presumably this should be
> brought in as part of teiid-engine-6.2.0-SNAPSHOT.jar, but I don't see it
> there. Did anyone else run into this problem?
>
> 3. Will we make the CDK a Maven project? This seems like a standard for all
> other projects in the Teiid trunk (perhaps an undocumented one).
>
> All in all, this is very cool stuff and I'm looking forward to using it,
> thanks all!
>
> --Mike
>
>
> Ramesh Reddy wrote:
>
>  Here is the place holder I created.
> http://www.jboss.org/community/wiki/TeiidConnectorDevelopmentEclipsePlugin
>
> You can login using the Jboss.org credentials and edit this page. Also,
> if anybody else edits the page you will get notification if you
> subscribe to the page.
>
> I have no experience with these template engines, but seems both are up
> to the task. I hoping anybody else with more knowledge will chime in.
>
> I agree that with current requirement we may not need to go to extent of
> using a template engine, where we can just get the job done using simple
> token replacement on the files
>
> Thanks
>
> Ramesh..
>
> On Tue, 2009-12-01 at 10:59 -0600, Sanjay Chaudhuri wrote:
>
>
> Hi Ramesh,
>
> Absolutely. Let me know how to go ahead with the wiki; I mean
> location, existing templates to look at, etc.
>
> I have looked at the eclipse core sources for the templates; it's in
> line with what I did. The other template frameworks are more elaborate
> substitutions;conditions, etc, which I do not think will be necessary.
> You can refer to Eclipse templates here:http://www.ibm.com/developerworks/library/os-eclipse-pde/ and JET
> templates here:http://www.ibm.com/developerworks/opensource/library/os-ecl-jet/. Let
> me know what you think, and possible use-cases incase you want to move
> forward with either one.
>
> There are few things left to be done, which I am planning to take up:
> 1. Preference Page with installed cdk plugin location or be able to
> custom it with no plugins.
> 2. Wizard for output directory which will keep last few directories.
>
>
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>
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