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Swapping out Spring Bean Configuration at Runtime

Most Java developers these days deal with Spring on a regular basis and there are lots of us out there that have become familiar with its abilities as well as its limitations. I recently ...
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Practical Introduction into Code Injection with AspectJ, Javassist, and Java Proxy

The ability to inject pieces of code into compiled classes and methods, either statically or at runtime, may be of immense help. This applies especially to troubleshooting problems ...
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Configuration Management in Java EE

Configuration Management has a lot of relevance in Cloud Computing as I tried to argue earlier. Actually, I would boldly claim that Configuration Management is a corner stone in any ...
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Database schema navigation in Java

An important part of jOOQ is jooq-meta, the database schema navigation module. This is used by the code generator to discover relevant schema objects. I was asked several times why ...
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Java Concurrency Tutorial – CountDownLatch

Some concurrency utilities in Java naturally get more attention than others just because they serve general purpose problems instead of more specific ones. Most of us encounter things ...
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Java Concurrency Tutorial – Blocking Queues

As discussed in Part 3, the thread pools introduced in Java 1.5 provided core support that was quickly a favourite of many java developers. Internally, the implementations make smart ...
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Sometimes in Java, One Layout Manager Is Not Enough

Most often when developing Java Swing applications, we need to use several layout managers in several nested panels. This is usually not a problem and is considered the normal practice ...
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Java Concurrency Tutorial – Callable, Future

One of the beautiful things about Java from its very first release was the ease with which we could write multi-threaded programs and introduce asynchronous processing into our designs. ...
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Java Concurrency Tutorial – Thread Pools

One of the most generally useful concurrency enhancements delivered in Java 1.5 was the introduction of customizable thread pools. These thread pools give you quite a bit of control ...
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Java Concurrency Tutorial – Reentrant Locks

Java’s synchronized keyword is a wonderful tool – it allows us a simple and reliable way to synchronize access to critical sections and it’s not too hard to understand. But sometimes ...
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