Re: [Jython-users] How best to deal with a bunch of .jar files?

[David N. <dn...@hd...>]

Thanks, Philip, for your suggestion. The import process now seems a lot 
more like boiling water than a nuclear power plant!

--David

Philip Jenvey wrote:
> 
> On Dec 3, 2008, at 9:31 AM, David Niergarth wrote:
> 
>> Hello,
>>
>> I need some basic help understanding how best to manage Jython scripts
>> that need access to lots of jar files (CLASSPATH, sys.path, registry).
>> I'm using Debian Lenny with Jython 2.2.1 on java1.6.0_0 (installed as
>> the standard packages).
>>
>> I'm using Jython to script Jasper Reports (an open-source Java reporting
>> library), which has a lot of dependencies (it's /lib subdirectory
>> contains 45 jar files).
>>
>> To get things working, I have added the full paths to all 45 jar files
>> to my CLASSPATH environment variable (2,690 characters). It also works
>> if I add the jar paths to the registry's python.path property and unset
>> CLASSPATH (or jython -Dpython.path=/long/path1:/long/path2:..., although
>> that's pretty unwieldy).
> 
> 
> If you can get away with it, lazily load the jar paths -- which'll be 
> particularly easy when they're all in the same directory. What I mean by 
> that is: just before you need them, have Python code to the dirty work 
> of globbing them into sys.path (which is where the -Dpython.path paths 
> end up).
> 
> for jar in glob.glob(os.path.join(my_jasper_path, '*.jar')):
>     sys.path.append(jar)
> 
> -- 
> Philip Jenvey