Wednesday, May 2. 2012
For quite a while the Ubuntu subversion package suffer from bad user certificates that do not follow the standards strictly. In case you have to authenticate with such a certificate subversion will return such an error message:
OPTIONS of '<url>': SSL handshake failed: SSL error: Key usage violation in certificate has been detected. (<url>)
The root of this problem is that the Ubuntu packages link against libneon-gnutls, which handles certificates in a stricter way than libneon. A easy workaround in the past was to simply replace a replace the library link of libneon-gnutls to point to libneon:
sudo mv /usr/lib/libneon-gnutls.so.27 /usr/lib/libneon-gnutls.so.27.old
sudo ln -s /usr/lib/libneon.so.27 /usr/lib/libneon-gnutls.so.27
However once you do this in Ubuntu 12.04 Precise Pangolin you will get a another error message instead:
OPTIONS of <url>': SSL handshake failed: SSL disabled due to library version mismatch (<url>)
Continue reading "Subversion & Certificate Problems with Ubuntu Precise Pangolin"
Friday, April 2. 2010
I'm glad to be able to depricate my own post Groovy++-with-Maven a couple of weeks ago. The Groovy++ team has already taken action and provides the groovvypp libraries in a commonly accessible repository. They also provide a preliminary version of the gmaven plugin that supports statically linked Groovy.
Friday, February 26. 2010
Please see my update Official-Maven-support-for-Groovypp.
If you are already a fan of Groovy you probably will also be a fan of the rising star Groovy++. Even people that dislike the dynamic magic of Groovy must agree, that this is cool stuff, mixing the power of Groovy with the safety and performance of classical Java. Since Groovy++ is still brand new it lacks of any Maven support today. In the following I will show how you can tweak the GMaven plugin for using the Groovy++ extensions.
Please be aware that this is just a very quick work to get it running and might not be stable. For example I did not verify all the necessary dependencies. So further work has to be done.
Continue reading "Build Groovy++ with Maven"
Saturday, November 14. 2009
Spring Actionscript is a great library - no question. It makes it much easier to mock Cairngorm service delegates and rewire them for testing with FlexUnit. Testing the full event/command/delegate workflow is pretty easy.
However today I had quite some "fun" with the Maven artifact and it's transitive dependencies in combination with Maven 2.2.1. Spring Actionscript has some dependencies to these artifacts:
Continue reading "Fun with Spring Actionscript and Maven (Updated)"
Sunday, February 8. 2009
Migrating an existing Java project for use with Hibernate is a difficult process. And yet I'm not sure if it is worth the work at all.
Some years ago I started a Java project with direct database access using JDBC and SQL. I designed my object model and a relational database schema. Both were optimized independenlty to work optimal in their environment. In order to connect the object world with the relational world, I wrote a clean storage layer, which was responsible for communicating with the database. This worked pretty good. But when Hibernate was becoming more and more popular, I started thinking about migrating to a Hibernate based object mapping.
Continue reading "Experience with a Hibernate migration project"