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

[Scott Lewis <slewis@xxxxxxxxxxxxx>]

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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