Subj : Re: Rhino and multithreading
To   : Barre Dijkstra <salp@xs4all.nl>
From : user@domain.invalid
Date : Wed Dec 31 1969 04:00 pm

The Rhino shell has a spawn() function that runs a script in another 
thread. It returns the java thread object which you can then join().

var x;
var t = spawn(function() {
      x = someTimeConsumingFunction();
});

var y = 12;
// ...
t.join();
var z = x + y;

Barre Dijkstra wrote:
> Greetings,
> 
> I am currently banging my head to the wall due to the following problem:
> I'm looking at rhino for an ecmascript implementation in java. All fine and
> well, until you start thinking about optimization and threading.
> 
> What I'm trying to accomplish is that when some script calls certain
> functions (implemented in an object that extends ScriptableObject that has
> been added to the applicable contexts) that a new thread is forked for
> optimization resons (for example, you don't want to halt your whole program
> when talking to some time consuming process on another machine over
> sockets). For example:
> 
> var x = someTimeConsumingFunction();
> var y = 12;
> var z = x + y;
> 
> How would the interpreter know that someTimeConsumingFunction() is done
> processing since there are no means to place a lock on either x or
> timeConsumingFunction();
> 
> In other words, has anyone had any experience in synchronization of
> javascript using rhino, or does anyone know any other javascript engine (in
> java) that does support threading?
> 
> Thanks,
> 
> Barre
> 
>

.