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Spring Singleton, Request, Session Beans and Thread Safety

The Spring framework ecosystem comprising of so many useful frameworks has become the backbone of many Java EE application. But at the core of all the spring products we still have the Spring DI/IOC framework which has catapulted ...
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High performance JPA with GlassFish and Coherence – Part 1

Have you heard about Coherence before? Probably yes. It’s one of those famous in-memory grid solutions promising awesome fast data access and unlimited space for your frequently used data. Some of it’s well k ...
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Scala Tutorial – SBT, scalabha, packages, build systems

Preface This is part 11 of tutorials for first-time programmers getting into Scala. Other posts are on this blog, and you can get links to those and other resources on the links page of the Computational Linguistics course I’m ...
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Best Of The Week – 2011 – W44

Hello guys, Time for the “Best Of The Week” links for the week that just passed. Here are some links that drew JavaCodeGeeks attention: * Practical Challenges of Profiler Integration with Java/J2EE Applications: This ...
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JBoss AS 7 EJB3 Pools Configuration

Now that AS 7.0.1 has been released, let’s take a look at what new EJB3 features are available. Like I mentioned in my previous post, AS 7.0.1 now allows you to configure pools for your stateless session beans and MDBs. Curr ...
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Everybody Knows About MVC…

From a recent blog, you may have gathered that I’ve recently been conducting some interviews and as they were for web application developers a question I asked was “can you explain what the MVC pattern is?”, and to their cre ...
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Scala Tutorial – scripting, compiling, main methods, return values of functions

Preface This is part 10 of tutorials for first-time programmers getting into Scala. Other posts are on this blog, and you can get links to those and other resources on the links page of the Computational Linguistics course I’ ...
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Java RESTful API integration testing

This post will focus on basic principles and mechanics of writing Java integration tests for a RESTful API (with a JSON payload). The goal is to provide an introduction to the technologies and to write some tests for basic correct ...
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Spring & Quartz Integration with Custom Annotation, the SPANN way

In a previous post, we demonstrated how to create and configure Quartz jobs with annotations in a Spring container. We used a class-level annotation to add some metadata to a bean which implements Quartz’s Job; the annotatio ...
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Log4j, Stat4j, SMTPAppender Integration – Aggregating Error Logs to Send Email When Too Many

Our development team wanted to get notified as soon as something goes wrong in our production system, a critical Java web application serving thousands of customers daily. The idea was to let it send us an email when there are too ...
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