Fixed #8326: added documentation about running Django on Jython. Docs originally written by Leo Soto, and then cleaned up a bit by me.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8582 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/howto/index.txt

@@ -19,6 +19,7 @@ you quickly accomplish common tasks.
    deployment/index
    error-reporting
    initial-data
+   jython
    legacy-databases
    outputting-csv
    outputting-pdf

docs/howto/jython.txt

@@ -0,0 +1,85 @@
+.. _howto-jython:
+
+========================
+Running Django on Jython
+========================
+
+.. index:: Jython, Java, JVM
+
+Jython_ is an implementation of Python that runs on the Java platform (JVM).
+Django runs cleanly on Jython version 2.5 or later, which means you can deploy
+Django on any Java platform.
+
+This document will get you up and running with Django on top of Jython.
+
+.. _jython: http://jython.org/
+
+Installing Jython
+=================
+
+Django works with Jython versions 2.5 and higher. 
+
+.. warning::
+
+    As of the writing of this document, a version of Jython compatible with
+    Django has not yet been released. The forthcoming 2.5a2+ release will be be
+    the first in which Django will work out of the box. 
+    
+    In the meantime, you'll need to use the latest development version of Jython
+    obtained from Jython's SVN repository.
+
+Download Jython at http://jython.org/.
+
+Creating a servlet container
+============================
+
+If you just want to experiment with Django, skip ahead to the next section;
+Django includes a lightweight Web server you can use for testing, so you won't
+need to set up anything else until you're ready to deploy Django in production.
+
+If you want to use Django on a production site, use a Java servlet container,
+such as `Apache Tomcat`_. Full JavaEE applications servers such as `GlassFish`_
+or `JBoss`_ are also OK, if you need the extra features they include.
+
+.. _`Apache Tomcat`: http://tomcat.apache.org/
+.. _GlassFish: https://glassfish.dev.java.net/
+.. _JBoss: http://www.jboss.org/
+
+Installing Django
+=================
+
+The next step is to install Django itself. This is exactly the same as
+installing Django on standard Python, so see
+:ref:`removing-old-versions-of-django` and :ref:`install-django-code` for
+instructions.
+
+Installing Jython platform support libraries
+============================================
+
+The `django-jython`_ project contains database backends and management commands
+for Django/Jython development. Note that the builtin Django backends won't work
+on top of Jython.
+
+.. _`django-jython`: http://code.google.com/p/django-jython/
+
+To install it, follow the `installation instructions`_ detailed on the project
+website. Also, read the `database backends`_ documentation there.
+
+.. _`installation instructions`: http://code.google.com/p/django-jython/wiki/Install
+.. _`database backends`: http://code.google.com/p/django-jython/wiki/DatabaseBackends
+
+Differences with Django on Jython
+=================================
+
+.. index:: JYTHONPATH
+
+At this point, Django on Jython should behave nearly identically to Django
+running on standard Python. However, are a few differences to keep in mind:
+
+    * Remember to use the ``jython`` command instead of ``python``. The
+      documentation uses ``python`` for consistancy, but if you're using Jython
+      you'll want to mentally replace ``python`` with ``jython`` every time it
+      occurs.
+     
+    * Similarly, you'll need to use the ``JYTHONPATH`` environment variable
+      instead of ``PYTHONPATH``.

docs/index.txt

@@ -137,6 +137,7 @@ And more:
     * :ref:`howto-custom-model-fields`
     * :ref:`howto-error-reporting`
     * :ref:`howto-initial-data`
+    * :ref:`howto-jython`
     * :ref:`howto-static-files`
 
 Reference

docs/intro/install.txt

@@ -19,6 +19,13 @@ version 2.3 and higher, but we recommend installing Python 2.5 or later. If you
 Get Python at http://www.python.org. If you're running Linux or Mac OS X, you
 probably already have it installed.
 
+.. admonition:: Django on Jython
+
+    If you use Jython_ (a Python implementation for the Java platform), you'll
+    need to follow a few additional steps. See :ref:`howto-jython` for details.
+
+.. _jython: http://jython.org/
+
 You can verify that Python's installed py typing ``python`` from your shell; you should see something like::
 
     Python 2.5.1 (r251:54863, Jan 17 2008, 19:35:17) 

docs/topics/install.txt

@@ -16,6 +16,13 @@ It works with any Python version 2.3 and higher.
 Get Python at http://www.python.org. If you're running Linux or Mac OS X, you
 probably already have it installed.
 
+.. admonition:: Django on Jython
+
+    If you use Jython_ (a Python implementation for the Java platform), you'll
+    need to follow a few additional steps. See :ref:`howto-jython` for details.
+
+.. _jython: http://jython.org/
+
 Install Apache and mod_python
 =============================
 
@@ -128,6 +135,8 @@ This file should also be located in your ``site-packages`` directory.
 
     (Note that this should be run from a shell prompt, not a Python interactive
     prompt.)
+    
+.. _install-django-code:
 
 Install the Django code
 =======================