Computing

JMS 2.0 Standalone Applications

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For a project of mine, I was looking to connect a standalone Java application via JMS with a GlassFish 4 backend service. To put it in other words, I wanted to run GlassFish 4 and get access to the JMS queues and topics from a standalone container. Having done this before with GlassFish 3.1. and […]

Software

NetBeans on Windows 7 x64

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NetBeans 7 has a problem under Windows 7 x64. When trying to start it, it only says: JVM creation failed. Just adding “-J-Xmx256m” to the netbeans_default_options, and thus not relying on the default value, solves the problem.

Computing

Clojure: Importing a Leiningen Project into Eclipse

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To import a Leiningen project into Eclipse, so that you can use CounterClockwise with all its nice features, such as syntax highlighting, there is a handy plugin called lein-eclipse. To get started, all you have to do is to add this plugin as a dev-dependency in your project’s project.clj. (defproject my-project “1.0.0-SNAPSHOT” :description “My Clojure […]

Computing

Reverse Engineering a PostgreSQL Database

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When working with relational databases it might come in handy to visualize an existing schema. Microsoft Visio supports such a reverse engineering of most databases in a remarkably easy way. This little tutorial assumes that the database to be reverse engineered is a PostgreSQL installation. Therefore, the first thing you need to do is to […]

Computing

Java Servlet & JSP Form-based File Upload

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Surprisingly, Java Servlets and JSP do not have build-in support for handling form-based file uploads. However, there are several open source libraries available for this purpose, among which the Apache Commons FileUpload is one of the most stable. This post will demonstrate how to use this library to handle form-based file uploads using JSP technology. […]

Software

GRE® POWERPREP with Windows 7 Pro

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Everybody who finds himself in the situation that he or she has to take the GRE General Test will receive a CD with the GRE® POWERPREP software from ETS a few days after registering for the test. Alternatively, the software can be downloaded from the ETS website. However, it only works with Windows OS up […]

Software

WordPress, and Server Error 500

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Like others, whose webhoster is 1and1 and who use WordPress, I experienced a lot of problems with some very popular plugins, such as qTranslate or NextGen. After activating the plugin, an Internal server error 500 occured whilst using the admin panel, even preventing me from deactivating the plugin. In this case, there’s only one option […]

Computing

ISTQB Certified Tester – Foundation Level

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Today, I took the ISTQB certification exam for the foundation level and some things struck me that might be of some interest for future examinees. As one has to sign a formal obligation saying that you’re not allowed to give information about exam questions, I cannot be very specific. However, here are some hints: The […]

Computing

3DScanner completed

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Today, after 4 months’ work, we completed our team project software 3DScanner. The project’s goal was to capture real-world objects of any size and recreate them as 3D models in a virtual environment. 3DScanner has a lot of advantages compared to other (even commercial) products. Firstly, only one camera is needed. Any off-the-shelf digital camera […]