Eyal Lupu Software Blog

Lately I wanted to quickly setup a Docker Swarm Mode cluster using Vagrant. I was looking for the simplest configuration - just something to be a sandbox to play with. Looking around most of the Swarm related Vagrant files were in the ‘old swarm way’ – that is: not the Swarm Mode – so I created one and uploaded to Github. Feel free to use it from: https://github.com/eyal-lupu/vagrant-docker-swarm-mode . See README.md for details.

The lack of Base64 encoding API in Java is, in my opinion, by far one of the most annoying holes in the libraries. Finally Java 8 includes a decent API for it in the java.util package. Here is a short introduction of this new API (apparently it has a little more than the regular encode/decode API).

I started to experience the Java 8 new APIs (still Early Access at the moment of writing this post) and the first thing I looked into was the new date and time API ( JSR 310 ). As there is much to cover in this new long awaited API I think it worth few posts with some examples. This post would be the first in a series, starting with some basic classes of the package: Instant, LocalDate, LocalTime, and LocalDateTime.

Java 7 is out there for such a long time now so this post is even not fashionably late but still there is one aspect of the try-with-resource construct which, in my opinion, is sometimes overlooked: In this post I would like to point out some behavioral change related to exception suppression which might affect code migrating from older Java versions.

Introduction Lately I encountered a configuration tweak I was not aware of, the problem: I had a single Java installation on a Linux machine from which I had to start two JVM instances - each using a different set of JCE providers. A reminder: the JVM loads its security configuration, including the JCE providers list, from a master security properties file within the JRE folder (JRE_HOME/lib/security/java.security), the location of that file is fixed in the JVM and cannot be modified. Going over the documentation (not too much helpful, I must admit) and the code (more helpful, look for Security.java, for example  here ) reveled the secret.

Introduction As a software architect one of the common tasks I have to deal with is web applications security. Usually I would try to make sure that security is automatically enforced by the infrastructure, however this is not always that easy – sometimes the underlying frameworks don’t provide any built in support or configuration which globally turns on a security attribute. This is why the new org.springframework.web.servlet.support.RequestDataValueProcessor interface in Spring MVC 3.1 seems to be very interesting: it provides a clean way to implement automatic CSRF protection.