RE: [Jython-users] sys.path under Tomcat

[Updike, C. <Cla...@jh...>]

I pass in the python home value as an absolute path via
context init parameter in web.xml. =20

If needed, you can get the absolute path for the webapp home=20
as follows:

try {
	sContextHome =3D URLDecoder.decode(sContext.getRealPath("/"),
"UTF-8");
} catch (UnsupportedEncodingException e) {
	throw new ServletException("Unable to URL decode context
home.");
}=20

where sContext is the ServletContext (of course, this won't work for=20
jar/war/ear).

-Clark

> -----Original Message-----
> From: jyt...@li...=20
> [mailto:jyt...@li...] On Behalf=20
> Of Simon Brunning
> Sent: Wednesday, May 17, 2006 10:11 AM
> To: jyt...@li...
> Subject: Re: [Jython-users] sys.path under Tomcat
>=20
> On 5/17/06, Updike, Clark <Cla...@jh...> wrote:
>=20
> Thanks for the help, Clark.
>=20
> > I run scripts in Tomcat but not using PyServlet--instead using a=20
> > JythonProcessor class.  This class has a static block that=20
> sets up the=20
> > stuff for the PythonInterpreter instances that run each script=20
> > invocation.
>=20
> I do something similar.
>=20
> > The relevant sections of the static
> > block looks like this:
> >
> > static {
> >
> >     ...
> >
> >     Properties overriddenProps =3D System.getProperties();
> >     Properties overridingProps =3D new Properties();
> >
> >     overridingProps.put("python.home", <python home>);
> (snip)
>=20
> This looks like the kind of thing I need - but how do I set=20
> this so that it will work regardless of where  python home=20
> is? It'll always be a directory under WEB-INF, always in the=20
> same place relative to it, but I don't want to hard code an=20
> absolute path. I'd like it to just work regardless of where=20
> Tomcat is installed - or indeed what platform it's running on.
>=20
> Come to think of it, ideally there should be some way of=20
> making this work in a strict J2EE server such as Websphere,=20
> which doesn't allow access to a file system at all. Is=20
> anything like that available?
> Perhaps I'll need to look at Commons VFS for this. Still,=20
> it's not a show stopper - we are only deploying iunder Tomcat=20
> for the moment.
>=20
> > I don't guarantee that this is the best way (or even the=20
> "right" way),=20
> > but it has worked for several years now in both Tomcat 4 and 5 in a=20
> > production environment.
>=20
> That'll be good enough for me!