Enigma Curry - Latest Comments in Distributing Jython Apps in a Single JAR file

Re: Distributing Jython Apps in a Single JAR file

Mrodent33 — Sat, 11 Jun 2011 14:55:19 -0000

If only all "how to" articles worked so well! Worked straight out of the box. The most annoying thing was actually downloading a) ANT and b) your GIT project itself: when I visited the ANT website I was told I'd have to "check out" with CVS... but eventually found an HTTP way of doing it. When I installed your GIT app in order to "check out" your project, GIT messed with Windows Explorer, adding some annoying stuff to the File menu, which I had to edit the (XP) registry to get rid of. There is an explanation of one-jar in The Definitive Guide To Jython, mentioning this site of yours, but their example didn't work for me: I got a totally mystifying "ClassFormatError: Truncated class file" when I tried to run the > java -jar XXX command. Your readme is exemplary too: short, clear, what you want to know, and to the point. You deserve a medal for services to Jython WBL (World's Best Language).

Re: Distributing Jython Apps in a Single JAR file

Michael Lancaster — Tue, 08 Mar 2011 22:31:43 -0000

Nice article! However, when i tried to use it for my app, I found that it was unable to find the Python libraries in the jar. On my development machine, they were found ok, but when I deployed to a machine which has neither Python nor Jython installed, it failed to load datetime. To make sure it wasn't some peculiarity of my app, I tweaked the provided sample app, adding 'import datetime' to the __init__.py. This gave the same failure. I suspect the issue is that Jython loads Python files using an explicit classloader, and therefore bypasses the one-jar classloader, but I haven't had time or inclination to verify this. I've since dropped one-jar and now my build.xml just gloms the library jars (including jython-full.jar) together. It now works when deployed on a clean linux machine with only java installed.

Cheers,

Michael

Re: Distributing Jython Apps in a Single JAR file

Carmine Noviello — Thu, 11 Nov 2010 12:39:07 -0000

Hi there Enigma,
thank you for share your great tool. I'm trying to build up the jar file of my jython app. But I'm experiencing problem maybe related to class path. My app uses Swing, and when I run jar file, it fails showing this exception:

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp...:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.simontuffs.onejar.Boot.run(Unknown Source)
at com.simontuffs.onejar.Boot.main(Unknown Source)
Caused by: Traceback (most recent call last):
File "<string>", line 1, in <module>
File "__pyclasspath__/airq/__init__.py", line 3, in main
File "__pyclasspath__/airq/Application.py", line 24, in <module>
ImportError: cannot import name swing

[cut]

Any tips?

Thanks in advance :-)

Re: Distributing Jython Apps in a Single JAR file

Michael Wicks — Thu, 30 Sep 2010 06:00:42 -0000

Thanks for your suggestions - I now think I've got a bizarre MySQL error to sort out instead (SQLCode:0 SQLState: 08S01), no solution on t'Internet seems to work.

But at least that's nothing to do with your code!

Cheers

Re: Distributing Jython Apps in a Single JAR file

Michael Wicks — Wed, 29 Sep 2010 06:14:55 -0000

Yup, done that, to no avail. Bizarrely when I run the script directly using Jython it works, so like you I suspect a Classpath issue.

here's the command that works:
java -Djdbc.drivers=org.gjt.mm.mysql.Driver -Dpython.home=/...../jython2.5.1 -Dpython.path=/.... -cp /..../jython2.5.1/jython.jar:/..../jython2.5.1/mm.mysql-2.0.14-bin.jar:/..../jython2.5.1/mysql-connector-java-5.1.12-bin.jar:$CLASSPATH org.python.util.jython regenerateDerivedData.py

I think I need to configure your ANT setup to pick up some of these flags, perhaps?

Re: Distributing Jython Apps in a Single JAR file

EnigmaCurry — Tue, 28 Sep 2010 12:26:18 -0000

I'm assuming you're putting your jar dependencies in the /lib directory? The jars you put there should be automatically added to your classpath. Maybe one of your jar's has another dependency that you also need to put in the /lib directory?

Re: Distributing Jython Apps in a Single JAR file

Michael Wicks — Tue, 28 Sep 2010 11:59:28 -0000

Hi there Enigma - handy tool here, but I have 1 question: I can get my Python/Jython script to execute nicely using your tool, but my script uses the zxJDBC library to access a MySQL database - and this continually fails thus, "zxJDBC.DatabaseError: driver [org.gjt.mm.mysql.Driver] not found".

I'm, guessing I need to amend my Classpath to pick up some JDBC-related JARs - so how can I amend your facility to do this?

It would be really dandy to package up everything I need to run my Python scripts as a Jar .... !

many thanks

Re: Distributing Jython Apps in a Single JAR file

EnigmaCurry — Wed, 24 Feb 2010 20:12:22 -0000

Nope, looks like it's really down now.

I threw it up on github: http://github.com/EnigmaCur...

I'll edit the post to reflect this change

Re: Distributing Jython Apps in a Single JAR file

Anthony — Wed, 24 Feb 2010 11:23:48 -0000

Does it still work for you? I can not clone your repo, I get back "fatal: The remote end hung up unexpectedly".. Thank in advanced

Re: Distributing Jython Apps in a Single JAR file

EnigmaCurry — Tue, 22 Sep 2009 22:57:40 -0000

git clone git://enigmacurry.com/singl...

works for me.

Re: Distributing Jython Apps in a Single JAR file

Name — Tue, 22 Sep 2009 19:36:26 -0000

Is the git server address right? Curious, how you setup the onejar... Thanks