Re: [ecf-dev] local remote services

[Scott Lewis <slewis@xxxxxxxxxxxxx>]

Hi Wim,

Wim Jongman wrote:
> Hi Scott,
>
> Sounds great. What about the speed of a "local" remote sevice? Does it 
> bypass networking?

Correct...there is no networking in the 'local' provider.  Actual remote 
calls will be far speedier than the use of any network...although not 
quite as speedy as a normal method call...because the local provider 
does a reflective method lookup and then calls Method.invoke(...).  See 
this method/class if you want to see the actual code implementing this 
lookup and reflective invocation.

org.eclipse.ecf.internal.provider.local.container.LocalRemoteServiceRegistry.callSynch(RemoteServiceRegistrationImpl, 
IRemoteCall)

Your question prompted the following thought/idea though...perhaps this 
provider could be enhanced to (optionally) introduce some random delay 
in the method invocation...to simulate network behavior.  This 
would/could be very useful for testing the timing of things.

Scott


> Regards,
>
> Wim
>
> On Jun 16, 2010, at 2:15, Scott Lewis <slewis@xxxxxxxxxxxxx> wrote:
>
> > Hi Folks,
> >
> > In a fit of desire to work on something new this past weekend, I 
> > implemented a new ECF remote services provider for inclusion in ECF 3.4.
> > This provider provides access to remote services *locally* (i.e. 
> > within the same framework).
> > What is the purpose for a remote service provider that is 
> > local-only?  :)  There are at least two purposes:
> >
> > 1) The ability to asynchronously access an OSGi service (i.e. 
> > AsyncCallback, IFuture, IRemoteService) [1]
> > 2) Testing of a remote service...without the necessarily messy steps 
> > of network discovery, and distribution.  This should facilitate 
> > writing/running test code for remote services...without having to 
> > have the discovery and distribution defined, deployed, configured on 
> > a given network, etc.
> >
> > This new provider project is located here:
> >
> > host:  dev.eclipse.org (extssh or pserver/anonymous access)
> > cvs path:  /cvsroot/rt
> > module:  
> > org.eclipse.ecf/providers/bundles/org.eclipse.ecf.provider.local
> >
> > There's also an initial test project:
> >
> > module:  
> > org.eclipse.ecf/tests/bundles/org.eclipse.ecf.tests.provider.local
> >
> > Scott
> >
> > [1] http://wiki.eclipse.org/Asynchronous_Proxies_for_Remote_Services
> > _______________________________________________
> > ecf-dev mailing list
> > ecf-dev@xxxxxxxxxxx
> > https://dev.eclipse.org/mailman/listinfo/ecf-dev
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