On Jan 22, 1:32 am, Patrick Dobbs <[email protected]>
wrote:
> Norris Boyd wrote:
> > On Jan 20, 10:59 am, Patrick Dobbs <[email protected]>
> > wrote:
> >> I've got a rhino shell session
> >> starting up a webserver and then registering a javascript handler for
> >> http requests.
>
> >> However, a shell session presumably creates one Rhino Context. And there
> >> can only be one Thread per Context (or vice versa). So what happens when
> >> a Rhino Shell session (single threaded) starts up a multithreaded web
> >> server, and that webserver then calls into Rhino?
>
> >> Thanks
>
> >> Patrick
>
> > The typical model is for each request in the web server to enter a
> > Context and then execute a script. This way you can have multiple
> > requests being processed concurrently in different threads.
>
> > --N
>
> Sorry, my question was rubbish. We currently have a java web application
> (Spring, Freemarker etc). We use Rhino in the way you describe, setting
> up a new Context for each request, adding some Host objects for the
> Http Request and Response etc.
>
> However, for a related project it would be useful if we could start and
> run a webserver from within Javascript (e.g. start the Rhino shell, load
> a script and call Server.run()).
>
> So, I guess my question is, can a single running script serve multiple
> threads?
>
> My understanding is "no", because a Context will reject multiple
> threads, but that it would be possible for the script itself to do
> something along the lines of the shell function spawn(). Are there
> any more detailed examples of using spawn() other than the example
> in the javadoc?
>
> Thanks
Ah, I understand better what you're asking.
If Rhino is called from a thread that does not have a Context
associated with it, it will automatically perform the association. For
example:
js> var runnable = new java.lang.Runnable(
> { run: function () { print("\nrunning"); } }
> );
js> var thread = new java.lang.Thread(runnable);
js> thread.start();
js>
running
You should be able to do something similar with a web server if you
can get the server to call your JavaScript on different threads.
--Norris
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