Re: [ecf-dev] Remote OSGi services

[Scott Lewis <slewis@xxxxxxxxxxxxx>]

Eugen,

I am busy with final prep for Ganymede so can't spend a lot of time with 
this now.  Other committers (e.g. Markus), please jump in and help Eugen 
further.

Discovery is a way/can be used to find remote OSGI services...we have 
example code that does this in these three projects:

org.eclipse.ecf.examples.remoteservices.common
org.eclipse.ecf.examples.remoteservices..server
org.eclipse.ecf.examples.remoteservices..client

http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.ecf/examples/plugins/?root=Technology_Project

These are all located in

/cvsroot/technology/org.eclipse/ecf/examples/plugins

You can see the registration via discovery and as a remote service in 
this server class:

http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.ecf/examples/plugins/org.eclipse.ecf.examples.remoteservices.server/src/org/eclipse/ecf/internal/examples/remoteservices/server/DiscoverableServer.java?root=Technology_Project&view=log

And the client is created by defining a 'serviceAccessHandler' 
extension.  This is an extension declaration from the client's plugin.xml

  <extension
        point="org.eclipse.ecf.discovery.ui.serviceAccessHandler">
     <serviceAccessHandler
           class="org.eclipse.ecf.internal.examples.remoteservices.client.RemoteEnvironmentInfoServiceAccessHandler">
     </serviceAccessHandler>
  </extension>


We have been discussing/are discussing with the p2 folks how to create p2 meta-data and artifact repositories that
can be discovered via the ECF discovery API (with either provider...zeroconf/jmdns and/or jSLP)...so it makes perfect
sense to create/add publish via discovery other management interfaces (like the ones that you have been working on Eugen).

Scott


Eugen Reiswich wrote:
> Hi all,
>
> I need some help regarding ECF remote OSGi services and hope that 
> someone is able to help me. The scenario is quite simple. I have some 
> clients connected to a server (in my case XMPP server). If a new 
> client connects to a server he is supposed to perform remote OSGi 
> services on the already connected clients. But this is not possible as 
> the remote OSGi service registration happens at the connection time.
>
> Now I've found the ECF discovery service 
> (http://wiki.eclipse.org/Discovery_of_Remote_Services) and wonder if 
> this might be the right approach for me. Although I tried to get 
> familiar with the code I didn't get the important steps.
>
> Could please anybody tell me if the discovery service is the right 
> approach in order to find dynamically remote services. And if possible 
> post some code snippet of the important stepts to do (client and 
> server side).
>
> That would be really great!
>
> Regards,
> Eugen
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