Hi,
has anyone running a reasonably current version of web2py running on
Jython 2.5.x? I need help with this.
>From reading the available information on the web I gained the
impression that Jython 2.5 is a fully supported platform. Wikipedia
says "web2py since v1.64.0 runs unmodified on Java with Jython 2.5,
without any known limitation". The Official (3rd Ed.) web2py Book
seems to support this claim, although the installation instructions
seem to be a bit outdated (zxJDBC is included in the 2.5.x Jython
install Jar, no need to install it separately).
The problem is, my experiences so far are very different. Here is the
reason why I am asking for help. I am facing a situation where I want
to have web2py running on a Linux host on which I have no admin
rights. The problem is that this machine has only Python 2.4
installed. Although web2py claims to be running on Python 2.4, it
really doesn't out of the box. A backported hashlib module would have
to be additionally installed. This doesn't seem to be a viable option
for me, given my limited admin rights on this machine. A Jython
install on the other hand should pose no problem. The additional gain
of this approach is, Jython 2.5 is an officially supported Python
version (2.5.2), Python 2.4 is not.
I can only try this next week for real, but I did some preliminary
tests on my local machine during the last few days. I tried on Windows
XP with Jython 2.5.0/ 2.5.1/ 2.5.2. I tested on an old (but updated)
Ubuntu installation with Jython 2.5.2. I tested on a Linux VM running
on Virtualbox 4.0.8. The consistent result for me was that the current
web2py releases don't work on Jython. For example with R-1.90.2 and
later the welcome app shows immediately (on first access) a ticket.
Root cause has something to do with the sqlite driver
('com.ziclix.python.sql.PyConnection' object has no attribute
'create_function'). Even older versions seem to raise exceptions with
tracebacks shown in the Jython console, hinting to 'rocket' and
'multithreading'. Details available upon request.
The most 'recent' version of web2py that seems to be running with
Jython 2.5.x seems to be 1.85.2 (hg commit #907). Even #918 seems to
be working fine. Later versions don't. I diffed the sources, but
somehow couldn't make sense of it.
So that is where I am standing now. What I am doing wrong? I seem to
be quite alone with my experiences since Google didn't provide
pointers to fellow sufferers. To reiterate my question: Has anyone
running a reasonably current version of web2py running on Jython
2.5.x?
Regards,
Richard
