May
10
2007
Groovy // Java

Getting Groovy with Hudson and Cobertura

Author An article by Glen    Comments 7 Comments

Gave a talk last night at our local Canberra JUG on using Hudson for continuous integration. (Brief slides available, but it was mostly a “demo” style talk… so not much to show)

But to spice it up a little, I used my latest little Groovy project as the demo. I was reading in Groovy in Action about the support Groovy Unit tests have for both IDE integration and coverage tools, so I thought I’d throw that into the mix. Using JUnit from Eclipse works just great…

Groovy with JUnit in Eclipse

I did have some problems getting my tests running from Ant, getting an error like: 

groovyc doesn't support the "srcdir" attribute

Which turns out to mean that I’d defined my groovyc task incorrectly. It needed to be:

<taskdef name="groovyc"
    classname="org.codehaus.groovy.ant.Groovyc"
    classpathref="useful.jars"/>

One thing I have been wanting to try out is Cobertura support for Groovy. Turns out to be a snack. The only gotcha is that you must set fork="true" on your JUnit task. If you don’t, all your coverage reports will appear blank (ie with 0% coverage).

Groovy Cobertura in Action

If you haven’t tinkered with Hudson before… it’s definitely time. Everything is configured via the browser, no XML to tinker with, and a it has a great Ajaxy UI.

I wasn’t aware that there is now also an Eclipse plugin for Hudson which can poll your build machine every so often and give you an update on the status of things. Very funky.

Hudson Plugin for Eclipse

It was a really fun talk, and people were pretty impressed with how far Hudson has come in such a short time. Interestingly, only a third of the group was doing CI right now, so it was pretty cool to be able to demo to them the “lunch-time-ability” of getting Hudson installed and configured.

Big props to the Hudson guys… and the Cobertura guys… and, of course, the Groovy guys! Very cool stuff!

About the Author: Glen Smith

7 Comments + Add Comment

  • Paul King May 10, 2007 at 10:19 pm

    Glen, neat stuff. Have you seen the upcoming CI/testing conference in July in Syndey:
    http://www.citconf.com/sydney2007/
    I am hoping to be there.

    Paul.

    Reply
  • Glen Smith May 11, 2007 at 5:08 am

    Looks like a great conference, Paul. Look forward to tracking the conference wiki to see what interesting developments comes out of the openspace format!

    Reply
  • Nigel May 13, 2007 at 10:08 am

    Small world! I decided to use your CSV library in my Hudson plot plugin ( https://hudson.dev.java.net/issues/show_bug.cgi?id=219 ), then I came across your Hudson blog entry.

    Reply
  • Glen Smith May 13, 2007 at 6:41 pm

    Great stuff. Love the Open Source ecosystem!

    Reply
  • Mark August 1, 2007 at 7:14 am

    Hi Glen,
    I know you from some posts about Grails :-) Have you tried to use Hudson with a Grails app? If just seen that there is a Gant Plugin, that could work for integration: http://hudson.gotdns.com/wiki/display/HUDSON/Gant+Plugin

    Cheers
    Mark

    Reply
  • Glen Smith August 1, 2007 at 12:40 pm

    No Mark, I haven’t. But there’s rumours that a future Grails release will have its own CI system build it!

    I’ve heard a few guys on the list have CruiseControl working, but I haven’t heard of any Hudson examples… yet… :-)

    Reply
  • Walter Gillett May 29, 2008 at 1:51 pm

    We’ve got Hudson working with our Grails build, not hard to set up, works great. Runs the same ant target that we run in IntelliJ.

    Reply

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Glen Smith

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Co-author Grails in Action

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