Re: [Jython-users] CLASSPATH problem under Tomcat

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Hello Jaraslav,

On Fri, 16 Feb 2001, Jaroslav Gergic wrote:
> > >Thak you for the tip! I will optionally upgrade -
> >
> > The change that brian describe is in org.python.util.PyServlet. Since
> > you can't possible be using this class (because it is completely new)
> > you will not find any benefits by upgrading. Unless you also begin to
> > use org.python.util.PyServlet.
>
> Yes, I checked CVS and PyServlet seems also interesting
> to me. I downloaded and compiled it but I can not
> make it working I am constantly getting:
>
> javax.servlet.ServletException: Could not create Jython
> servletTraceback (innermost last):
>   File "D:\develo\tomcat3.2b6\webapps\hello\hw.py", line 1, in ?
> NameError: javax
>
> (I am testing Hello World servlet distributed with PyServlet:)
> ---sample---
> class hello(HttpServlet):
>   def doGet(self,req, res):
>     res.setContentType("text/html");
>     out = res.getOutputStream()
>     print >>out, "<html>"
>     print >>out, "<head><title>Hello World, How are we?</title></head>"
>     print >>out, "<body>Hello World, how are we?"
>     print >>out, "</body>"
>     print >>out, "</html>"
>     out.close()
>     return
> ---end---
>
> It also does not work even when I try to write
> "class hello(javax.servet.http.HttpServlet)"
>
> and in case I try to import the interface:
>
> ---sample---
> from  javax.servlet.http import HttpServlet
>
> class hello(HttpServlet):
> ...
> ---end---

You are correct, the import and base class is required.

> I get:
> javax.servlet.ServletException: No callable (class or function) named
> hw in D:\develo\tomcat3.2b6\webapps\hello\hw.py

The class name and file name need to match.  Much like class hello would
be defined in hello.java, Jython's class hello(HttpServlet) should be in a
hello.py file.  Remember PyServlet uses:

	PyObject cls = interp.get(name);

and "name" is the filename without the extension.

> (the script should probably evaluate to a single node...?)
>
> ***
> I is interesting for me, because my application (python based
> templates in Java + Tomcat)
> works normally using the CLASSPATH trick described earlier.
> I think there is some subtle difference between my CLASSPATH
> handling and PyServlet classpath handling.
> Can something be wrong with the following lines?:
> ---from PyServlet---
>         PySystemState sys = Py.getSystemState();
>         sys.add_package("javax.servlet");
>         sys.add_package("javax.servlet.http");
>         sys.add_package("javax.servlet.jsp");
>         sys.add_package("javax.servlet.jsp.tagext");
> ---end---
>
> Anyway - PyServlet is good idea, I planned to write
> something similar myself in the future,
> and PyServlet saves me some time.
> I hope I will get this thing working soon too.

It's only moments away...

-Robert