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Re: Dynamically adding to classpath

by Chris Evans-8 :: Rate this Message:

For some reason, neither of these worked for me. My app is making a
SOAP connection to the Websphere server. When I add the websphere
jars to the classpath in the jruby executable, it works. If I append
the jars in the script, either through $CLASSPATH << or 'require
blah.jar', the script fails. It doesn't look like a ClassNotFound
error, either, it seems to be loading the classes but the SOAP
connection fails.

Chris

On Wed, Mar 5, 2008 at 3:05 PM, Lenny Marks <lenny@...> wrote:

> You can also append to the $CLASSPATH global at runtime(unless that's
> frowned upon these days). Here's an old post about what we were doing
> (still more or less the same).
>
> http://archive.jruby.codehaus.org/user/B5A15A45-71F7-4432-8F10-
> C892023A157F%40aps.org
>
> Also..
>
> http://wiki.jruby.org/wiki/FAQs#How_come_Java_can.
> 27t_find_resources_in_class_folders_that_I.27ve_appended_to_the_.
> 24CLASSPATH_global_variable_at_runtime.3F
>
> -lenny
>
>
>
> On Mar 5, 2008, at 11:39 AM, Chris Evans wrote:
>
> > well, its still pretty cool :)
> >
> > On Wed, Mar 5, 2008 at 11:33 AM, Nick Sieger <nicksieger@...>
> > wrote:
> >> No, you still need to use "import" or "include_class" unfortunately.
> >> This is just shorthand for making them available on the classpath.
> >>
> >> /Nick
> >>
> >>
> >> On Mar 5, 2008, at 9:40 AM, Chris Evans wrote:
> >>
> >>> If I require the jars this way, do I also need to include_class the
> >>> classes I need, or will they be available because of the require?
> >>> Because that would be really cool :)
> >>>
> >>> Chris
> >>>
> >>> On Tue, Mar 4, 2008 at 11:31 PM, Nick Sieger <nicksieger@...>
> >>> wrote:
> >>>>
> >>>> On Mar 4, 2008, at 8:37 PM, Chris Evans wrote:
> >>>>
> >>>>> I'm working on a module for managing Websphere, using Jruby and
> >>>>> Websphere MBeans. It works great, but I've modified jruby.sh to
> >>>>> add
> >>>>> the (numerous) needed $WAS_HOME/lib jar files to the classpath.
> >>>>>
> >>>>> I'd prefer to give my module the name of the WAS_HOME/lib
> >>>>> directory,
> >>>>> and have my module add the needed jars to the load path or
> >>>>> classpath
> >>>>> programmatically, leaving jruby.sh untouched ( and my command line
> >>>>> clean and simple)
> >>>>>
> >>>>> Possible?
> >>>>
> >>>> Sure -- try
> >>>>
> >>>> Dir[ENV['WAS_HOME'] + '/lib/*.jar'].each {|jar| require jar}
> >>>>
> >>>> -- assuming WAS_HOME is present in the environment.
> >>>>
> >>>> Cheers,
> >>>> /Nick
> >>>>
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> >>>>
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> >>>
> >>
> >>
> >>
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