Re: [Jython-dev] Deploying app in jar file

[Dave Kuhlman <dkuhlman@re...>]

Dave Kuhlman <dkuhlman <at> rexx.com> writes:

> 
> I have some questions about the use of jar files with jython.


Off list, Marvin Greenberg explained this to me.  Quoting from
Marvin:

    The jython.jar does not contain the python library modules. 
    You can do a jar -tvf or similar.  You won't see __future__.py
    (or datetime.py or UserDict.py or any of the other modules that
    you will see in the jython Lib/ directory.  When you run the
    jython script, it adds JYTHON_HOME/Lib to your path which is
    why you can find __future__.py.  You should be able to see the
    same thing in your original test by adding JYTHON_HOME/Lib to
    you sys.pathbefore doing the import.

    If you want to package everything into a jar, you'll have to
    put the various python library modules you use into the jar
    too.  The jython.jar only includes the builtin modules like
    sys.

Marvin is suggesting that we selectively add items from
JYTHON_HOME/Lib as we learn that they are needed.  In what follows,
I'm just going to add everything under Lib/.

Our goal is to be able to create a file or files that can be
deployed and used to run a Jython application on a machine on which
Jython is *not* installed (but java installed, of course).

Suppose we want to run our applicaton by executing:

    $ java -jar myapp.jar testfuture.py

To build our jar, we first make a copy of jython.jar, then add the
Lib/ directory to it:

    $ cd $JYTHON_HOME
    $ cp jython.jar jythonlib.jar
    $ zip -u -r jythonlib.jar Lib

Then we copy this expanded jar file, and add modules that are
specific to our application.  I'm also going to add a path to an
additional jar file to the manifest:

    $ cd ../Test
    $ cp $JYTHON_HOME/jythonlib.jar myapp.jar
    $ zip myapp.jar Lib/showobjs.py
    # Add path to additional jar file.
    $ jar ufm myapp.jar othermanifest.mf

Where, othermanifest.mf contains the following:

    Class-Path: ./otherjar.jar

Now I have a self-contained jar file that I can run without
anything from my Jython installation.  All that is needed is myapp.jar and 
otherjar.jar

To run the application, we do:

    $ java -jar myapp.jar testfuture.py

My testfuture.py follows.  Note that it imports showobjs.py which
came from my Lib directory and also imports __future__ which came
from JYTHON_HOME/Lib.  Also, it imports from another jar
(otherjar.jar), which I added to the manifest in myapp.jar with the
Class-Path jar property.  Ivan Horvath gave us that piece of the
puzzle on the jython-user list (in thread "jythonstandalone with
3rd party jars" on 9/26/07.  The othermanifest.mf that I used to
add the additional jar file contains:

    Class-Path: ./otherjar.jar

Here is a listing of the contents of otherjar.jar:

    $ unzip -l otherjar.jar
    Archive:  otherjar.jar
      Length     Date   Time    Name
     --------    ----   ----    ----
            0  09-26-07 09:28   META-INF/
           71  09-26-07 09:28   META-INF/MANIFEST.MF
           49  09-26-07 09:27   testotherjar.py
     --------                   -------
          120                   3 files


Here is testfuture.py, which I use to start up my test app:

    # testfuture.py

    from __future__ import generators
    import sys
    import testotherjar

    import sys
    print 'sys.version:', sys.version
    print 'sys.path:', sys.path

    import showobjs

    def test():
        a = ['aaa', 'bbb', 'ccc', ]
        showobjs.showlist(a)
        b = showobjs.simplegen()
        for item in b:
            print 'gen:', item
        print 'Testing other jar.'
        testotherjar.fromotherjar('davy')

    if __name__ == '__main__':
        test()


Dave

Re: [Jython-dev] Regarding Names in the Change Log and Contributors List

[Keshav Upadhyaya <ukeshav@no...>]

It is a good suggestion to add names in Change Log=20
As far as i know most of the   Open Source Projects follow the same =
tradition .

...eager to know what other ppl are thinking on this.

-: Keshav upadhyaya=20



>>> "Mehendran T" <TMehendran@...> 09/25/07 12:41 PM >>>=20
Hi,

I have looked at the change log of latest release(2.2.1rc1). It is a =
good=20
feeling to see our bug fix in the list. But It would be so nice if you =
add=20
names too in the change log as in the following=20

Jython NEWS

Jython 2.2.1 rc1
  Bugs fixed
    - [ 1773865 ] Patch for [1768990] pickle fails on subclasses (Mehendran=
 T)


And one more suggestion is that, Active contributor names can be=20
added in the CONTRIBUTOR LIST.=20

Thanks and Regards,
Mehendran T


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[Jython-dev] Some patches...

[Keshav Upadhyaya <ukeshav@no...>]

Hi Charlie ,

Will you please review these  patches and give me ur valuable suggestions =
so that i will be=20
keep on submitting more patches.

https://sourceforge.net/tracker/?func=3Ddetail&aid=3D1783088&group_id=3D128=
67&atid=3D312867

https://sourceforge.net/tracker/?func=3Ddetail&aid=3D1785415&group_id=3D128=
67&atid=3D312867

https://sourceforge.net/tracker/?func=3Ddetail&aid=3D1797751&group_id=3D128=
67&atid=3D312867

https://sourceforge.net/tracker/?func=3Ddetail&aid=3D1779428&group_id=3D128=
67&atid=3D312867

thanks,

keshav upadhyaya