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From "Marco Laponder" <>
Subject RE: war framework / external jar setup
Date Mon, 10 Aug 2009 12:22:28 GMT


Thanks so far for your support. I keep learning new things every day ;-)


I need to study the pre-package method some more, but I will get back to
you if I need some more information. 


Now I have added the dependency in my ear deployment plan to the
impl.jar, and that works fine. Also when I copy a new jar and restart my
ear it works as expected. Some more questions raised in my head:


1)       is it possible to reload the jar without restarting my ear from
the Geronimo console ? 

2)       Assume I don't know all my dependencies in advance (so an
impl2.jar is required as well) can this also be accomplished ? 

3)       install-library fails if it is already there so I must copy the
jar, is it possible to have a re-install-library command, or an
-overwrite option ?


Kind regards,



Van: David Jencks [] 
Verzonden: maandag 10 augustus 2009 9:06
Onderwerp: Re: war framework / external jar setup


Hi Marco,


On Aug 9, 2009, at 11:18 PM, Marco Laponder wrote:



I will look into this option. We are maven to install our war (or in
fact ear but I guess that doesn't make a difference). I am not familiar
with 'pre-package as geronimo plugin', but I will look into this, but if
you could point me to any documentation this will be very much


There is some documentation here:


but that seems to be missing the actual text of the examples: the copy
actually in confluence seems to look better:


Just to be sure with 'deploy your jar directly into the maven
repository' you mean an install-library with the deploy command ?




Let us know if you have more questions,


david jencks





Van: David Jencks [] 
Verzonden: donderdag 6 augustus 2009 18:10
Onderwerp: Re: war framework / external jar setup


While the suggestion of deploying your entire app "in-place" will almost
certainly work, it has a number of limitations -- in-place is really
only designed for development and does not work well with the geronimo
plugin packaging and distribution system.


What may work better for you is to deploy your jar directly into the
geronimo repository and include a dependency on it in the geronimo plan
for your web app.  If you update the jar (copying the new version on top
of the old one in the geronimo repository) then if you restart the web
app you will see the new classes.


This method works well with maven and geronimo plugins.  For instance,
if your jar and web app are built with maven, and you pre-package your
app as a geronimo plugin, installing the plugin into a geronimo instance
will also pull in the external jar.


hope this helps

david jencks


On Aug 6, 2009, at 4:34 AM, Marco Laponder wrote:

Hi erveryone,


I need some advice on the following situation. We have a war with a
framework which based on configuration in the database and use of
reflection dynamically can call a method of a java class. When this
class is present in a jar (lets call it impl.jar) which is located in
WEB-INF/lib it works as expected.


However what I want to accomplish is:

1)       have the impl.jar not included in the WEB-INF but at an
alternate external location, so for a new impl.jar we need not redeploy
the war

2)       once the jar has been altered I probably need to force a reload
of the classes already loaded by the Geronimo classloader. Is this
possible and how can this be accomplished


When I am completely off the track or have any other advice which could
help me just point me in the right direction, any documentation or
google terms will be appreciated.


Kind regards,

Marco Laponder




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