A local Maven repository serves as a cache for artifacts and dependencies, we all know this. This helps in speeding up things but can cause subtle problems when doing releases. Docker can help here a bit for avoiding caching issues.
My docker-maven-plugin is undergoing a major refactoring. This post explains the motivation behind this and also what you can expect in the very near future. The configuration syntax becomes much cleaner and implicit behavior was removed.
While on the way of transforming the Jolokia integration test suite from a tedious, manual, half-a-day procedure to a full automated process I ran into and felt in love with Docker. As a byproduct a java-jolokia docker repository emerged, which can be easily used as a Java base image for enabling a Jolokia JVM agent during startup for any Java application.
NSEnter is a nice way to connect to a running Docker container. This post presents a script to simplify the usage of nsenter together with Boot2Docker.
Recently I gave a Meetup talk for the Docker Munich Meetup Group which explained how Docker can help developers to improve integration tests and to ship applications.
Jolokia has configurable CORS support so that it plays nicely together with the Browser world when it comes to cross origin requests. However, Jolokia’s CORS support is not without gotchas. This post explains how Jolokias CORS supports works, what are the issues and how I plan to solve them.
If you have ever sent or received mail messages via Java, chances are high that you have used JavaMail for this task. Most of the time JavaMail does an excellent job and a lot of use cases are described in the JavaMail FAQ. But there are still some additional quirks you should be aware of when doing advanced mail operations like adding or removing attachments (or “Parts”) from existing mails retreived from some IMAP or POP3 store. This post gives a showcase for how to remove an attachment from a mail at an arbitrary level which has been obtained from an IMAP store.
