[Embedlets-dev] RE: MediaController

[Ted K. <tk...@ya...>]

Chris wrote:

>If we all agree on the MediaController interface then everyone can 
>implement their favorite hardware device in their xxxMediaController 
>and expect a plug and play deployment. This could be the first 
>operational JAPL! Lets go!

Chris, this is a killer idea!  The first question I have is whether the
MediaController is a JAPL interface or an Embedlet Adapter?  In my mind, JAPL
interfaces were designed to represent I/O circuits like a servo controller, a
temperature sensor, an emergency stop button, etc.

For example, I want the CNC controller Embedlet that I am building to use a
something like a JAPL ServoController interface to control the movements of the
XYZ positioning system.  I want to be able to have the Embedlet send a message
like:

servoController.moveTo(X, Y, Z, Speed);

to the servo mechanism and I don't want to know how the communications between
the JAPL interface and its analogous I/O circuit actually happens so it appears
that the MediaController is positioned behind the JAPL interface somewhere.

The MediaController appears to be a clean communications mechanism that allows
a JAPL interface to easily communicate with the physical I/O circuit that it
represents so perhaps it fits the role of Adapter better?

Ted

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