Re: [ecf-dev] tutorial idea: OSGi remote services for existing services

[Scott Lewis <slewis@xxxxxxxxxxxxx>]

Hi Folks,

To go along with the example client code for the Geonames Timezone 
service [1], I've started a tutorial that details/documents how this 
example was created [2].

The tutorial is not finished yet (e.g. running the example consumer), 
but that's a good time for review and feedback :). Please review and 
provide feedback if you can.  My intention is to finish this tutorial 
prior to release of ECF 3.9.2 on December 22nd.

Thanks,

Scott

[1] https://github.com/ECF/Geonames
[2] 
https://wiki.eclipse.org/Tutorial:_ECF_Remote_Services_for_Accessing_Existing_REST_Services

On 12/5/2014 11:10 AM, Scott Lewis wrote:
> Hi Folks,
>
> I've been working on the example code for this tutorial, and the 
> latest is available on github [1].
>
> As I said below, I found a small bug in the rest client code that had 
> to be addressed [2] and I've since fixed this bug, and added a couple 
> of 'builder' classes to simplify the construction of the association 
> between the RSA-constructed remote service proxy and the REST request 
> creation, execution, and response handling.
>
> The upshot is that I would like to propose that we have another 
> maintenance release before the end of 2014 to pick up these fixes and 
> small additions, so that when I finish the tutorial ECF Remote 
> Services impl will fully support it.
>
> Any objections to maintenance release (3.9.2) this month?  I was 
> thinking perhaps Dec 22nd to make an early Christmas gift.  :)
>
> Thanks,
>
> Scott
>
> On 11/27/2014 3:11 PM, Scott Lewis wrote:
> > I've created a new github repo for the Geonames Timezone example I've 
> > been working on.  The bundles so far are (in bundles directory):
> >
> > 1.  org.geonames.timezone - declares the Geonames timezone API as an 
> > OSGi service interface called ITimezoneService
> > 2. org.eclipse.ecf.provider.geonames.timezone.client - An ECF Remote 
> > Services provider using the ECF Rest API and JSON parser to make the 
> > REST call and process the server's JSON response.
> >
> > I've also begun the creation of two consumer bundles to test the 
> > above provider
> >
> > 3. org.eclipse.ecf.geonames.timezone.consumer - A very simple 
> > consumer which finds (via ServiceTracker)  ITimezoneService proxies 
> > and then calls the ITimezoneService.getTimezone/2 method on the added 
> > proxy.
> > 4. org.eclipse.ecf.geonames.timezone.consumer.edef = A very simple 
> > EDEF bundle, containing the EDEF to discover the Geonames timezone 
> > service, with RSA then creating the ITimezoneService proxy.
> >
> > Over the next week, I'm going to write a short tutorial that shows 
> > particularly the code in org.geonames.timezone (remote service API) 
> > and org.eclipse.ecf.provider.geonames.timezone.client (REST Client 
> > Remote Services ECF provider)
> >
> > In testing this code unfortunately I discovered an oversight bug in 
> > the RestClientService class from the changeover from httpclient 3.3 
> > to 4.X.  See [2] for details.  To get this new example to work, this 
> > fix has to be in place in the runtime, meaning that we will need to 
> > produce 3.9.2 release for people to be able to successfully run the 
> > timezone example themselves.  We can discuss the timing of 3.9.2 
> > creation and release relative to other things that committers and 
> > contributors are currently working on.
> >
> > If people have comments about any of this, would like to 
> > help/contribute on this example, or would like to suggest specific 
> > things to focus on for the wiki tutorial, please say so here, produce 
> > a pull request, or contact me directly to coordinate on the tutorial.
> >
> > Thanks,
> >
> > Scott
> >
> > [1] https://github.com/ECF/Geonames
> > [2] https://bugs.eclipse.org/bugs/show_bug.cgi?id=453484
> >
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