[Ctk-developers] communication model in ctk

[Sascha Zelzer]

Hi Daniele and Paolo,

your ideas are quite similar to what we discussed during the 
pre-hackfest in March. Great :-)

We thought that we can probably make good use of the ServiceFramework in 
QtMobility:

http://qt.nokia.com/products/appdev/add-on-products/catalog/4/new-qt-apis/mobility

Have you had a look at it? It follows the approach where you define 
interfaces (pure abstract classes) which get implemented in the same or 
a different shared library. Modules/Plugins would then get a concrete 
implementation of an interface from the central ServiceManager. 
Additionally, service providers register their implementations via a XML 
file and only get loaded when a "client" requests a concrete implementation.

We also discussed a little bit the use of an event/message bus. I am 
very interested in your experiences with it!

Best,

Sascha

On 05/03/2010 05:52 PM, Daniele Giunchi wrote:
> Dear ctk-Developers,
> reading documentation about ctk, we notice that it could be very
> useful defining a communication model between modules which depends
> from other modules inside the common toolkit. This can reduce coupling between
> them or however give an organization in order to simplify the
> implementation of possible extensions.
> In MAF3 we implement this model:
>
> 1) creating for each module a facade class which represents the interface of it;
> 2) using design by contracts to ensure that input and output will be coherent;
> 3) we implement concrete communication using a layer (called
> mafEventBus) which bases its functionalities on Qt signal/slot.
>
> Inside each module, the communication between objects and class
> dependencies doesn't follow this schema and it is more free.
> What do you think about discussing this approach?
>
> best regards,
>
> Daniele and Paolo
>
>
> ----------------------------------------
> Dott. Daniele Giunchi
> BioComputing Competence Centre
> Super Computing Solutions s.r.l. , CINECA
> Via Magnanelli 6/3, 40033 Casalecchio di Reno BO, Italy
> http://tinyurl.com/z24zv
> http://www.scsolutions.it
> mailto:d.giunchi at scsolutions.it
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