Category: Java

I applied as a GSOC mentor for the first time. I’ll be mentoring Gentoo/Java IDE integration project. I’m personally interested in this project since I use Eclipse for Java development on my Gentoo box and I think many people like me can benefit from the outcome. Although I’m not a Netbeans user, the same applies for it as well. Yes I’m tired of defining user libraries (additionally pointing to their sources, jni libs, javadocs)

So let’s see if anyone applies for this project (A few already contacted by mail)

Here are 2 tools for generating repository statistics for source trees controlled with CVS and SVN. Both tools can generate stats for subtrees. Here’s how to generate stats for a CVS checkout:

• cd to module root or a subdirectory which the stats will be generated for.
• Create the cvs log by executing

  cvs log > logfile.log

• Execute

  statcvs logfile.log . -o -output-dir /path/to/stats

  to generate stats.

and for SVN:

• cd to module root or a subdirectory which the stats will be generated for.
• Create the svn log by executing

  svn log -v --xml > logfile.log
  

• Execute

  statsvn logfile.log . -output-dir /path/to/stats

  to generate stats.

Now you can browse, upload, do whatever you want with generated stats. I generated stats for our java-config-2 project. The sample StatSVN output can be viewed at http://dev.gentoo.org/~serkan/statsvn-java-config-2/. Also Jeremy generated CVS stats for gentoo-x86/sys-apps which can be viewed at http://dev.gentoo.org/~darkside/stats/statcvs-sys-apps/.

Further Reading: You can read the following manuals for detailed information.

• StatCVS manual: http://statcvs.sourceforge.net/manual.html
• StatSVN manual: http://wiki.statsvn.org/User%20Manual.ashx

WARNING: Please do not run cvs log on cvs.gentoo.org. Use rsync to mirror the portage tree from AnonCVS provided by infra and run cvs log on the local mirror.

The tool Betelgeuse wrote was scanning Java packages for unneeded dependencies. It was scanning the registered jar’s for any referenced classes and generated a list of classes in dependent packages/jars to see if any of them are redundant. Back on December I came up with an idea to use that information to dig out for an opposite fact. Packages that reference classes which are not provided by it’s dependencies not itself. It was bug #252249 which inspired me. The initial ebuild was definitely missing a dev-java/sun-jai-bin .dependency which I wanted to verify. The intention was to discover missing dependencies. of binary Java packages.

After I got it working without (hopefully) false positives it was then time to see the results. I first ran it in over the packages installed on my system. Thanks to Diego who kindly ran it in his tinderbox which had most of the Java packages in portage installed and posted the output. I was surprised about the outcome. There were many source based packages that it reported to depend on missing classes. Roughly examining the list I saw that some packages installing ant tasks were missing an ant core dependency and fixed a few. Another set of packages seem to package its unit tests (see java-wakeonlan for example) Digging out others I figured out a third kind of problem. Packages missing already generated jars or classes in the final package.env entry. Those (openoffice,xulrunner,java-access-bridge) reported missing classes that was already provided by themselves. They either didn’t install the jar at all or installed but not registered them (we have java-pkg_regjar provided by java-utils-2 eclass which registers an already installed jar). But java-access-bridge had an interesting bug which was there for ages. The generated jar misses already compiled classes due to wildcards not being expanded recursively during make and reported the bug to upstream. Mindterm exibits a similar bug. Classes were missed out in jars because they weren’t in the hardcoded list of classes to package.

As a final word, I’ll be taking next days investigating output generated in Diego’s tinderbox, and fixing the packages.

Addition: Add note about net-misc/mindterm bug.

Following up Petteri’s post about icedtea6-bin package we now have 1.6.0.12 versions of sun-jdk and sun-jre-bin in tree. This version finally adds long awaited (6 year old bug in sun bug database) 64-bit browser plugin along with 64-bit Javaws. Simply install any of the two with nsplugin USE flag and start running Java applets. Note that it only works with Firefox 3.