Incompatable Interfaces

[John Oliver-4]

We have been getting a number of these issues on the mailing lists due
to the incompatibility between 2.1 and javaclient2. I read from Leo
Nomdedeu that a solution is being worked on. Could I ask what the form
of this solution is? Due to the fact that player seems to change its
protocols quite often if we change the classes to fit the current spec
is it not quite likely we will be back in the same position in a year
or so when things change again.

I notice that the pack functions for the communications in player are
generated at compile time using a python script (playerxdrgen.py).
Could we not modify this to allow us to generate the java side too thus
allowing us to keep player and Javaclient in sync without manually
making the changes?

Unfortunately I do not have too much time to attempt this myself,
however I was wanting to gauge reaction to see if this was the current
approach or if anyone thinks this is possible.

Thanks
John Oliver

-------------------------------------------------------------------------
This SF.net email is sponsored by the 2008 JavaOne(SM) Conference
Don't miss this year's exciting event. There's still time to save $100.
Use priority code J8TL2D2.
http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone
_______________________________________________
Java-player-users mailing list
Java-player-users@...
https://lists.sourceforge.net/lists/listinfo/java-player-users

[Radu Bogdan Rusu-2]

Hi John,

John Oliver wrote:
> We have been getting a number of these issues on the mailing lists due
> to the incompatibility between 2.1 and javaclient2. I read from Leo
> Nomdedeu that a solution is being worked on. Could I ask what the form
> of this solution is? Due to the fact that player seems to change its
> protocols quite often if we change the classes to fit the current spec
> is it not quite likely we will be back in the same position in a year
> or so when things change again.

The current incompatibilities are due to the fact that Javaclient2 was written for Player 2.0.x. The current changes in
Player 2.1 were long awaited by anyone who ever wanted to design a custom interface, or, simply reduce the amount of
bandwidth/data it had to transfer (e.g. camera images where always an issue with Player - not anymore! :) ).

Leo is bravely taking a hit at upgrading Javaclient2, and I will try to help maintain it more in the near future as
well. It would be great if more people could contribute though - especially since we seem to have quite a few users out
there.

We don't need to worry about more incompatibilities and changes between Player and Javaclient. We're not going to change
the current Player interfaces anytime soon, so once we upgrade to 2.1 we should be fine for some (long) time.

> I notice that the pack functions for the communications in player are
> generated at compile time using a python script (playerxdrgen.py).
> Could we not modify this to allow us to generate the java side too thus
> allowing us to keep player and Javaclient in sync without manually
> making the changes?

That's what Leo is working on. So far we had to modify and test each interface manually, and that worked fine at the
beginning since their number was "maintainable". Nowadays we just have too many, and a scriptable solution which
generates them automatically is the right choice.

> Unfortunately I do not have too much time to attempt this myself,
> however I was wanting to gauge reaction to see if this was the current
> approach or if anyone thinks this is possible.
>
> Thanks
> John Oliver

I know how that feels. I'm trapped in the same loophole... Still, e-mailing ideas and suggestions does help.

Cheers,
Radu.
--
| Radu Bogdan Rusu | http://rbrusu.com/
| http://www9.cs.tum.edu/people/rusu/
| Intelligent Autonomous Systems
| Technische Universitaet Muenchen

-------------------------------------------------------------------------
This SF.net email is sponsored by the 2008 JavaOne(SM) Conference
Don't miss this year's exciting event. There's still time to save $100.
Use priority code J8TL2D2.
http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone
_______________________________________________
Java-player-users mailing list
Java-player-users@...
https://lists.sourceforge.net/lists/listinfo/java-player-users