Re: Reshaping the JavaSpaces architecture. Just some thoughts ...

Oliver Plohmann wrote:
> With regard to distributed event notification ...  I was assuming that 
> event notification is only triggered when an entry is written to the 
> space, because it says on p.140 of Flenner's book ("Jini and JavaSpaces 

Right: the arrival of the entry indicates a state change in the space.

> about the traffic light changing from red to green a traffic light 
> object with color "green" needs to be written to the space, that is 
> simply changing the the value of color attribute wouldn't do. I admit 

You cannot modify a value in-space-place - _that's the whole point!_
The only way of causing an observable state change is by writing a new 
entry, like e.g. a new version of the TrafficLightState for a particular 
traffic light.

Holger

PS: let me know if you want to discuss all this in German, via email or 
voice. :)

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