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Adding Turbochargers to JEE Apps

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One of the key roles, I play is evangelizing Akka within my local community. As part of the discussions, the question/doubt usually in people’s mind is how can Akka provide better scalability and concurrency against a well written Java/JEE application. Since the underlying hardware/JVM remains the same, how can the actor model ooze out more power than the traditional JEE ...

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Jenkins enhancements without plugins

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Jenkins is a popular open source continuous integration server. I use it heavily. Jenkins is super extensible CI server with huge plugins repository. But I must admit that there are a lot of cases when all these Jenkins plugin’s ‘zoo’ doesn’t help. What does it mean?: we need a tons of plugin to solve some non-trivial problem, too many plugins ...

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In-experienced development = Bowl full of Soup

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There are times when things become an uphill task all of a sudden. It happened to me in my last assignment. I was asked to take charge of an existing product. The product has been under development for about 2 years, and now it needed to fix a few things so that the system can scale well. It started quite ...

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GET / POST with RESTful Client API

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There are many stuff in the internet how to work with RESTful Client API. These are basics. But even though the subject seems to be trivial, there are hurdles, especially for beginners. In this post I will try to summarize my know-how, how I did this in real projects. I usually use Jersey (reference implementation for building RESTful services). See ...

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Java Thread: retained memory analysis

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This article will provide you with a tutorial allowing you to determine how much and where Java heap space is retained from your active application Java threads. A true case study from an Oracle Weblogic 10.0 production environment will be presented in order for you to better understand the analysis process. We will also attempt to demonstrate that excessive garbage ...

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Top 10 JavaCodeGeeks posts for 2012

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Following the tradition, we are once again compiling the top Java Code Geeks for the year that is ending. As with the Top 10 JavaCodeGeeks posts for 2010 and the Top 10 JavaCodeGeeks posts for 2011, we have created a compilation with the most popular posts for this year. The posts ranking was performed based on the absolute number of ...

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Easier Multi-Field Validation with JSF 2.0

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One of the most frequent needs when developing application forms is multi-field validation (or cross-field, but I’m not using this term because when I put it on Google I actually got some post-war pictures). I’m talking about situations where we need to compare whether an initial date is earlier than an end date or a value is lower than another ...

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The Differences Between Test-First Programming and Test-Driven Development

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There seems to be some confusion between Test-First Programming and Test-Driven Development (TDD). This post explains that merely writing the tests before the code doesn’t necessarily make it TDD.             Similarities Between Test-First Programming and Test-Driven Development It’s not hard to see why people would confuse the two, since they have many things in common. ...

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Java – The 2012 Review and Future Predictions

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This post will focus on the events big and small that occurred in 2012 and also take a look at some future predictions for 2013. Some of the predictions will be honest guesses, others…. well lets just say that my Diabolical side will have taken over . So without further adieu lets look at the year that was 2012 for ...

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Waiting for the right moment – in integration testing

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When you have to test multi-threaded programs, there is always the need to wait until the system arrives at a particular state, at which point the test can verify that the proper state has been reached. The usual way to do it is to insert a ‘probe’ in the system which will signal a synchronization primitive (like a Semaphore) and ...

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