Shards Of Development

Since September 2015 I am a committer of the open source Eclipse Virgo project.I have written several posts in the past about the Eclipse Virgo OSGi application server, and after having helped the project team with patches and bug fixes I have been invited by Florian, the project lead, to... [Read More]

The information below has been tested with JProfile 5 on Linux 64bit, and assumes that the JProfiler Agent is installed in folder /opt/jprofiler5. While this post refers to a rather old JProfiler version, I am sure the principles apply also to more recent JProfiler version.  The following environment variables must be... [Read More]

Few days ago I started looking for a monitoring tool to track the health status of our Virgo Server for Apache Tomcat instances.As I could not find anything Virgo specific, I looked for an open source tool that supported Apache Tomcat 7.0.First try was Moskito, but it does not seem... [Read More]

Dependency injection is certainly one of the most effective design patterns for writing clean, maintainable and testable code.For these reasons it's been very popular over the past few years and a number of libraries/frameworks have been created to provide support for dependency injection. The most well known implementations are probably... [Read More]

In my OSGi applications I often make use of the OSGi extender pattern. An excellent example is available on Kai's Toedter blog.As Peter Kriens explained:In the Synchronous Bundle Listener event call back, the subsystem can look at the resources of the bundle and check if there is anything of its... [Read More]