How to manage Git Submodules with JGit

For a larger project with Git you may find yourself wanting to share code among multiple repositories. Whether it is a shared library between projects or perhaps templates and such used among multiple different products. The Git built-in answer to this problem are submodules. They allow putting a clone of another repository as a subdirectory […]

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Clean Synchronization Using ReentrantLock and Lambdas

Recently I was reading an informative post about the differences between synchronized vs ReentrantLock by Javin Paul1. He emphasises on the advantages of the latter, but does not withhold some downsides, which are related to the cumbersome try-finally block needed for proper usage. While agreeing on his statements I brooded about a thought, that always […]

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Efficient Code Coverage with Eclipse

There is a saying that a fool with a tool is still a fool. But how to use a tool most efficiently is not always obvious to me. Because of this I typically spend some time to check out new playgrounds1 that promise to increase my work speed without impairing quality. This way I came […]

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Slim Down SWT FormLayout Usage

Always on the quest for efficiency I reconsidered the usability of SWT FormLayout lately. Although it is one of my favored core layouts with respect to flexibility, I had to recognize that it is only reluctantly used by most of my fellow workers. Proposing it for an appropriate task sometimes actually seems to inflict real […]

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What are Mockito Extra Interfaces?

Mockito is my favored little helper if it comes down to write light weight JUnit tests. It is very useful to replace the ‘real’ dependencies of a unit under test easily by mocks if necessary. In particular when working on the borderline to framework APIs such dependencies can otherwise be very expensive to setup. But […]

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Getting JUnit Test Names Right

Finding good names is one of the challanges of crafting software. And you need to find them all the time and for everything – classes, methods, variables, just to name a few. But what makes a name a good name? To quote Oncle Bob: ‘Three things: Readability, readability, and readability!’ Which he defines later one […]

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Clean SWT Listener Notifcations with SWTEventHelper

Writing tests for SWT based UIs often requires to notify widget listeners programmatically. Unfortunately the code to create, initialize and finally to trigger the event is a bit verbose and distracts from the actual purpose of the test. After writing similar initialization routines a couple of times I came up with a little utility class […]

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SWT: Do You Know the Difference between Tree#select and Tree#setSelection?

Actually I did not, neither did Google and the API documentation seems to miss out one crucial point – which took me some time to figure out. So I decided to be a nice boy scout and share my findings as my good deed of the day 1. According to the JavaDoc the method Tree#select(TreeItem) […]

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Using the AutoValue Code Generator in Eclipse

My colleague Moritz of EclipseSource recently came across Google Auto, a collection of Java code generators. AutoValue is one of them and generates Java code for immutable objects. It provides an annotation and an annotation processor to generate Java code for immutable value objects. The current version is labelled RC1 and a 1.0 release is […]

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A JUnit Rule to Ease SWT Test Setup

Rüdiger and I have written a lot of SWT test cases for our current RCP project lately. Most of the time we can execute them as plain JUnit tests. Still they also have to run in a RCP integration environment. Long story short we wrote a DisplayHelper fixture to reduce redundancy and handle display related […]

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