| Use of remote service client API with non OSGI-services [message #1485606] |
Mon, 24 November 2014 06:32  |
Eclipse User |
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Hello,
In this (already a bit older) blogpost (http://eclipseecf.blogspot.be/2010/01/soap-rest-and-ecf-remote-services.html) I found out about the existence of org.eclipse.ecf.remoteservice.client API, which should enable an OSGI-based client to consume restful services as if they were OSGi (ideally declarative) services.
I would like to try this out in a RCP application, but apart from javadoc I didn't find any examples on how to get started with this client-library : all examples I've found have clients interacting with "authentic" OSGI service providers.
Any hints, of code example on this ?
Thanks a lot,
Thomas Elskens
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| Re: Use of remote service client API with non OSGI-services [message #1486111 is a reply to message #1485606] |
Mon, 24 November 2014 15:47  |
| Eclipse User |
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Hi Thomas,
Your questions about the client API are rather timely. Why timely? Because although we have tutorials and examples that show how to create custom providers...e.g.
http://wiki.eclipse.org/Tutorial:_Creating_a_RESTful_Remote_Service_Provider
we do *not* yet have a tutorial/examples that show how to create a client-only provider to interact with a non-OSGi hosted service (e.g. an existing REST, SOAP, or other service). In October, I actually have proposed that I create such a tutorial myself on the ECF dev mailing list:
http://dev.eclipse.org/mhonarc/lists/ecf-dev/msg07317.html
As you can see by reading the responses to this thread, there were some really good ideas of an existing service that could be used for this example/tutorial, but as of right now I haven't actually decided what service I would focus on for the example/tutorial.
BTW, there was an example client that interacted with an old version of the Twitter service some years ago (before they changed the twitter authentication) in ECF test code here:
http://git.eclipse.org/c/ecf/org.eclipse.ecf.git/tree/tests/bundles/org.eclipse.ecf.tests.remoteservice.rest/src/org/eclipse/ecf/tests/remoteservice/rest/twitter
One issue for me doing this work immediately is that I don't currently have support (read $$) for work on ECF, and so can't dedicate as much time to it as I would like.
But to summarize: I am thinking of working on such a tutorial/example, but need to figure out
1) How I can dedicate some paid work time to such an effort
2) Which existing service to create a client provider for
3) Get some assistance from other in the ECF community in creating the examples and tutorial
If you have ideas or could contribute to any of 1-3 then it certainly could move things along. You might want to jump in on the ecf-dev thread discussing which existing service to us (2). To join the ecf-dev mailing list go here:
https://dev.eclipse.org/mailman/listinfo/ecf-dev
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| Re: Use of remote service client API with non OSGI-services [message #1490655 is a reply to message #1486111] |
Fri, 28 November 2014 05:19 |
| Eclipse User |
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Hello,
I proposed a little idea on the mailing list. But in the meanwhile, I don't quite understand the API of the remote client.
As far as my understanding goes :
- First I've to instantiate a RestClientContainer with the targetID of the webservice server
- then I register some Callables with it and save this registration in a IRemoteServiceRegistration
- I have to instantiate a RestClientService. All methods of this class are protected, so I have to extend it. Parameters of the constructor are the container and ServiceRegistration previously instantiated.
So far so good, I guess.
The main method of interest in the RestClientService is invokeRemoteCall(IRemoteCall call, IRemoteCallable callable). Here I'm stuck : the first argument can be created with RestCallFactory, but what about the callable ?
The only way I can think of getting to a callable at this point is to write this.invokeRemoteCall(call, this.registration.lookupCallable(call))
Or am I mistaken alltogether about the way I should use the class RestClientService ?
Thomas Elskens
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