Class paths for Jenkins?

[Peter Berghold]

Following up on a silly question from the other day I have another silly question. Where does Jenkins look for jar files to resolve classes and packages?

I've started writing a Java library that I want to access from a pipeline and Jenkins can't seem to find it in spite of it being deployed to /usr/share/java where other Java applications find their jars.   

Any pointers are appreciated.

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Peter L. Berghold                       Salty....@gmail.com

http://devops.berghold.net

[Mark Waite]

It seems like you may be trying to extend the functionality of Jenkins with additional Java code that you want to run inside the Jenkins process on the Jenkins master, and possibly on one or more agents attached to the master.

If so, first be certain that there isn't already a Jenkins plugin that solves the specific problem you're trying to solve.  The most frequent answer to the question, "Do I need to write a plugin to do X?" is "No, because a plugin already exists to do X, or to do Y which is very similar to X and can be extended or modified to do X".

If a search of available plugins and a discussion of the specific problem you're trying to solve does not identify an existing plugin that will meet the need, then you probably need to write a plugin.

While revising a Jenkins Plugin Development course prior to Jenkins World 2017, I wrote a blog post pointing to many resources on writing Jenkins plugins.  Refer to https://jenkins.io/blog/2017/08/07/intro-to-plugin-development/ for that blog post.

Thanks,
Mark Waite

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Thanks!

Mark Waite

[Peter Berghold]

was kinda hoping I could solve this without the overhead of a module.  And no there isn't as far as I can tell a module that does what I need to do.

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[Slide]

Plugins are generally "the" way to add functionality to Jenkins. Without a plugin, it will be difficult to use any jars that you want added to Jenkins.

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