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Re: [virgo-dev] Would you like to try debugging a Gemini Blueprint issue (with ECF)?

Hi Dmitry,

On 2/5/2013 11:20 AM, Dmitry Sklyut wrote:
Hello Scott,

Can you please give us a quick overview on how and when ECF intercepts service creation and gives client a proxy?

On remote service host side, ECF has a service registry hook such that if the service is registered as a remote service (i.e. with the appropriate OSGi service properties), AND the the remote service config is of ECF type (identifying an ECF provider as the appropriate exporter), the service is exported as a remote service by the ECF remote service admin impl.  It is also published for discovery.  This all happens as part of the registerService call (again given the presence of the appropriate properties).

On consumer side, when a remote service is discovered (via the discovery mechanism), the Remote Service Admin implementation importService method is called to import the remote service.  Part of the import is the creation of a proxy for the remote service, followed by the addition to the consumer's service registry of that proxy.  ECF's remote service admin only imports remote services that were exported via ECF remote services.


I think there is a very easy way out of this situation, I just would like a bit of background to validate the "easy" button.


Dmitry Sklyut
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On Tuesday, February 5, 2013 at 1:08 PM, Scott Lewis wrote:

Hi Glyn and Geminers,

I looked at the forum posting that Glyn points to, and created a reply [1].

My current take on things is that for some reason I don't yet understand, Gemini's importer is being used to create proxies..rather than ECF's Remote Service Admin implementation...and so the proxy being created is not as expected by the client code (i.e. it doesn't implement IRemoteServiceProxy...which is an ECF interface implemented by all proxies).  But I don't know what Gemini is doing (yet), so am not sure.

Just to introduce myself to this list, I'm the ECF project lead and am largely responsible for ECF's implementation of OSGi remote services and Remote Service Admin.  There's documentation for things starting here [2].  I've just joined this list (gemini-dev), but my 'home list' is ecf-dev :).

Hopefully we can jointly diagnose and fix this user's use case.  Is there someone available on this list that is familiar with Gemini's remote service importer?



[1] http://www.eclipse.org/forums/index.php/mv/msg/452390/1007392/#msg_1007392
[2] http://wiki.eclipse.org/ECF#OSGi_Remote_Services

On 2/5/2013 8:41 AM, Glyn Normington wrote:
An issue has cropped up when Gemini Blueprint is used with ECR. I currently don't have time to dig into. A simple testcase has been provided on github, so if you are a bit of an expert on Gemini Blueprint, or would like to become more expert, please dive in. I'm happy to discuss findings of course.

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