Lately I have been looking into and playing around with the Google App Engine. In this post I want to give a little introduction to the Google App Engine, why it can be interesting and how to work with it.
Logging to the syslog from a java application
Every application needs logging, it can help you during development and when debugging those annoying things that do not work in production. One question is where to put the logging events. All linux servers use a system log to log events that take place on the operating system level. You can find logs for the kernel, […]
Mahout – Taste :: Part 1 – Introduction
This post is the first in a series on Taste, a Java framework for providing personalized recommendations. Taste is part of the larger Mahout framework, which features various scalable machine-learning algorithms. In this post I introduce you to the concepts of personalized recommendations, also known as collaborative filtering. After this introduction, Taste’s architecture and extension […]
A new and improved Spatial Solr
Introducing the Solr Spatial Plugin What do a directory services company, a wholesaler of bathroom fittings, a social events guide, an oceanographic data centre and the pan-European library initiative have in common? They all need to offer their clients the ability to search and filter results within a flexible geographic area, defined by the user. […]
Securing connections with TLS
In this article I’ll explore some ways to secure socket communication with TLS from a java application. To make it more concrete I’ll show you SubEtha SMTP (an excellent Java based bare bones SMTP server) and the recent TLS extensions I added to it. What you’ll get from this article: How to mix secure with […]
Exploring the world of Android :: Part 2
And I’m back! Reporting live on the glorious adventures in the exciting world of Android. This blog post is the second one in the Android series. This time with code samples! Yeah! In my first blog post about Android I talked about setting up a project using Android. This time I want to discuss a […]
Wicket do’s and don’ts
In the past 2 years I worked in, and visited many development teams to help them implement divers Wicket applications. Some applications were mostly for visualizing stuff, some were full of forms, and some were full of Ajax tricks. This article contains some of the lessons I had to teach, or had to learn myself. […]
Feed Your Database
The priority that performance testing gets among other development activities is always less; it is an “afterthought”, not a critical, ongoing part of the development process. Typically, it is done in higher environments like ST, QA. Some attention is given to performance in the prior SDLC cycles like design by making proper selection of frameworks. But […]
Easier mocking with Mockito
If you have been happily using Easymock for the past years, this blog post is for you. Because you need to upgrade to Mockito, the new kid on the block in the mocking universe. Why bother about what mocking framework you’re using to create your unittests? Because it will improve you tests, make them more […]
Automated functional testing with WebDriver
There is nothing nicer than having a functional test suite that checks if your application is still working as it should. It is even nicer to run these tests and see what is happening, while the tests are being executed. Two of the tools that give you this opportunity are Selenium RC and WebDriver. In […]