[Jython-users] RE: Jython + JSP pages ?

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Hello all,

I've had progress with JSP and Jython and thought I would post
some info for those that expressed interest.

My previous posts noted difficulty in using jythonc compiled files with
JSP on Windows.  However, the machine I was using had multiple JDK's
installed.  Because of my troubles, I uninstalled all jdks and 
re-installed only sun's 1.2.2 (out of convenience- I had the installer on
the desktop), and all of the JSP problems that I was having are
gone.  It's odd that other Java apps were working fine, and I was sure
tomcat and jython/jythonc both pointed to the same jdk, but nonetheless
this was a solution for me.

A simple example of using Jythonc classes with tomcat is (using Tomcat
3.2, jdk1.2.2_07, Win98):

1. Make a context ("jython" in this example).

2. compile following jython file with 
"jythonc NameHandler.py" 
(NOTE: changing the instance variable "usrname" to "username" is
catastrophic- very interesting ;)

--------------jython file: NameHandler.py----------------
import java

class NameHandler(java.lang.Object):
    def __init__(self):
        self.usrname = "Fred"
    def getUsername(self):
        "@sig public String getname()"
        return self.usrname
    def setUsername(self, name):
        "@sig public void setname(java.lang.String name)"
        self.usrname = name
----------------------------------------------------------

3. Copy NameHandler.class & NameHandler$_PyInner.class to
\%TOMCAT_HOME%\webapps\jython\WEB-INF\classes

4. Make test.jsp file from below

--------------jsp file: test.jsp--------------------------
<%@ page import = "mytest" %>

<html>
<head><title>hello</title></head>
<body bgcolor="white">
Hello, my name is
<% NameHandler nh = new NameHandler(); %>
<%= nh.getUsername() %> <br>
No! wait...
<% nh.setUsername("Robert"); %>
,  It's really <%= nh.getUsername() %>.

</font>
</body>
</html>
-----------------------------------------------------------

5. Place test.jsp file in
context (ie- "\%TOMCAT_HOME\webapps\jython\jsp\test.jsp")

Restart Tomcat and visit
"http://localhost:8080/jython/jsp/test.jsp".  This
is it.

Using jythonc compiled files, importing org.python.util.PythonInterpreter
directly in the jsp, and writing java classes/beans that import
PythonInterpreter have now all worked well for me with JSP.

My next step is a snappy jython memento for persistence- maybe even
setting python.security.respectJavaAccessibility = false
to see what things can be done then.  All hints welcome.

-Robert