In my previous blog post I we saw a test-driven approach to GWT UI code. This was based on moving logic to a Supervising Controller. In this follow-up post we’ll turn our attention to interacting with RPC, and see how this can be tested using EasyMock. This involves some tricks and non-trivial boilerplate code, but […]
Test driven development for GWT UI code
Is a test driven development (TDD) approach possible when creating a GUI using GWT? This post is about how to apply MVC (Model-View-Controller) to organize GWT UI code, with these objectives: a clear separation of the controller logic from presentation and model full testability of the controller logic independent of the (browser or hosted mode) […]
Too many open files
Today I was asked to review a piece of code that a coworker of mine suspected was causing “Too many open files“ exceptions in a production environment The code looked innocuous enough. He was using ProcessBuilder to create and run an external application. Regardless I booted into Linux and ran some tests. Now on Linux […]
Spring 2.5 and Maven problems
It looks like the spring 2.5 jars that where uploaded to the official maven repository are broken. The full spring jar is 321 kb large and only contains the spring aop classes. Anyway I added springs own repository to my pom and then i got the correct jar and sources <repository> <id>spring</id> <name>Spring Portfolio Repository</name> […]
Optimizing startup time for GWT hosted mode
When developing GWT (Google Web Toolkit) applications, the GWT hosted mode is an invaluable tool, as it allows for short development cycles. Whenever you change something in the GWT client code and hit the “Refresh” button it will compile the change, reload the application and show the result of my change almost immediately. In theory, […]
Extensibility jBPM style
Currently I am involved in a project that is moving away from a proprietary workflow solution to a JBPM based workflow solution. One of the first things I attempted to do was try and make jBPM integrate with the identity management solution used in the project. I knew that jBPM comes packaged with some sort […]
What to do with an Interruptedexception
Many java methods, such as Thread.sleep and Process.waitFor can throw an Interruptedexception. InterruptedException is a checked exception and as such requires you to explicitly catch it. Up until recently I’ve always simply swallowed this exception. I was fairly confident that this was the proper way to deal with this exception because this is how I’d […]
Maven wastes more time than it saves. Cast your vote
I just finished added a pole to this blog and the first question I would like to ask my audience (all 3 of you 😉 ) is. Does maven waste more time than it saves compared to say an ant or make based build. In my experience this statement holds true however I am curious […]
JPA missing non-exotic features
Ever since the Java Persistence API was announced there has been a lot of talk, both good and bad, about this specification. Many people have pointed out that a criteria API and something like hibernate filters are currently missing. However these features might be considered “exotic” and I can largely live without them. However a […]
JavaFX released
It seems JavaFX was released today. There are some pretty good looking demo’s over at http://blogs.sun.com/chrisoliver/category/F3 and https://openjfx.dev.java.net/ Worth a look.