RE: [Jython-users] Generated java classes dependency

[Garcia, M. <mg...@Bu...>]

Hi Pierre,
I believe you are correct.  You must have the jython.jar on your delivery
platform.  This is not unlike trying to write servlets or some other java
app.  You need to have the supporting libs on the system it will run on.

The jython app you are delivering is dependent on the jython distribution.
Would it be possible to distribute jython with you jar?  

regards,
Mick

-----Original Message-----
From: DITTGEN Pierre
To: jyt...@li...
Sent: 3/30/01 7:26 AM
Subject: [Jython-users] Generated java classes dependency

Hello,

I'm quite new to jython, i find it very powerful as a script language.
But at this time, I have a problem to make an independant jar from a
jython
script.
I use Jython 2.0, with SUN JDK1.3.0 on Win2000 Pro.

My script is called dir.py and contains:
== begin ======
import os

for file in os.listdir('.'):
	print file
== end ========

It works well as I use the command line:
jython dir.py
(it shows me the list of the files of the current directory)

I want to build a jar file from this script.
I used this command :
jythonc -a -j dir.jar dir.py
It created a jar file (called dir.jar) which contains normally all the
needed jython libraries
needed to make it run.
But as I want to run it, using the command
java -jar dir.jar
I got an exception :
== begin ==============
Java Traceback:

        at org.python.core.Py.JavaError(Py.java:238)
        at org.python.core.PyTableCode.call(PyTableCode.java:159)
        at org.python.core.imp.createFromCode(imp.java:157)
        at org.python.core.Py.runMain(Py.java:798)
        at dir.main(dir.java:61)
Traceback (innermost last):
  File "C:\Documents\src\jython\test\dir.py", line 0, in main
java.lang.ExceptionInInitializerError: java.lang.NullPointerException
        at org.python.modules.os.<clinit>(os.java:11)
        at java.lang.reflect.Method.invoke(Native Method)
        at org.python.core.PyJavaClass.initialize(PyJavaClass.java:108)
        at
org.python.core.PyJavaClass.lookupGivingClass(PyJavaClass.java:666)
        at org.python.core.PyClass.lookup(PyClass.java:164)
        at
org.python.core.PyJavaClass.__findattr__(PyJavaClass.java:712)
        at org.python.core.PyObject.__getattr__(PyObject.java:670)
        at dir$_PyInner.main$1(dir.java:43)
        at dir$_PyInner.call_function(dir.java:28)
        at org.python.core.PyTableCode.call(PyTableCode.java:155)
        at org.python.core.imp.createFromCode(imp.java:157)
        at org.python.core.Py.runMain(Py.java:798)
        at dir.main(dir.java:61)

java.lang.ExceptionInInitializerError:
java.lang.ExceptionInInitializerError
== end ================

I solved the problem giving the root dir of jython installation as a
system
property:
java -Dpython.home=c:\dev\jython-2.0 -jar dir.jar

But it annoys me...
Is the generated jar (dir.jar) still dependant of the jython
installation ?
Does it mean that it can't run on a workstation having only JRE
installed ?
If not, please help me to find out the thing or the option I missed.

Thanks
Pierre
-- 
Pierre Dittgen, software engineer
CRIL Telecom software
E-mail: pie...@cr...
Phone: (33) 1 58 17 04 64

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