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

Wouldn't this work:


    public class TrafficLight implements Serializable {
        public String color;
    }

    public class GreenMeansGo implements RemoteEventListener {
        public void notify(RemoteEvent event) {
            // GO!
        }
    }

    TrafficLight template = new TrafficLight();
    template.color = "GREEN";

    GreenMeansGo listener = new GreenMeansGo();

    BasicJeriExporter listenerExporter = new BasicJeriExporter(
        TcpServerEndpoint.getInstance(0),
        new BasicILFactory()
    );
    GreenMeansGo listenerProxy = (GreenMeansGo)
listenerExporter.export(listener);

    javaSpace.notify(template, null, listenerProxy, Lease.FOREVER, null);


Geoff.

On Wed, Apr 30, 2008 at 4:55 AM, Oliver Plohmann <[email protected]> wrote:
>
>
>
> Hi there!
>
> I had a look at tuple spaces and JavaSpaces a while ago and really liked the
> approach. I think a central data store is a good idea for distributed
> processing of data (calculations, data analysis, etc.). However, there is a
> problem if it's not only about distributed processing. Let's say you need to
> be notified if some traffic light changes from red to green. You don't want
> to poll the traffic light all the time, right?
>
> So what I'm thinking of is to add distributed message passing to JavaSpaces
> for distributed event notification. In that context it would make sense to
> reshape the JavaSpaces architecture to be fit for todays needs in enterprise
> computing: replace the Jini stuff with JNDI or an ESB, use a cache provider
> such as JBoss Cache, or some other cache system, or use the respective parts
> of the Blitz project if permitted, add JMS for distributed event
> notification and communication with the central tuple space, use Spring for
> XML configuration and/or IoC if needed, extend the JavaSpaces API to address
> the new architecture, make sure the API remains simple and consistent, and,
> and, and, ...
>
> I guess the Jini folks will now get mad at me. What I'm mentioning here are
> just some ideas. I just want to see what other people think about this and
> share some opinions. Maybe some guys could be found to start an open source
> project. Would be fun ... ;-)
>
> Regards, Oliver Plohmann
>
>
> www.objectscape.org
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