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RESTful Web Services with Java

REST stands for REpresentational State Transfer, was first introduced by Roy Fielding in his thesis “Architectural Styles and the Design of Network-based Software Architectures” ...
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Supply & Demand in software development

(Whoops, I’m publishing a revision of this blog entry – something I don’t normally do. I realised after publication that I had mislabelled the graphs – they were correct ...
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Throttling Task Submission with a BlockingExecutor

The JDK’s java.util.concurrent.ThreadPoolExecutor allows you to submit tasks to a thread pool and uses a BlockingQueue to hold submitted tasks. If you have thousands of tasks ...
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The future may just as well be RESTful

Chris Zheng has just published an article on “Why the future is NOT RESTful”. It made a bit of a splash, but I think it’s based on false assumptions and quite wrong. Here’s ...
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Hibernate Facts: Knowing flush operations order matters

Hibernate shifts the developer mindset from thinking SQL into thinking object state transitions. According to Hibernate Docs entity may be in one of the following states:                  new/transient: ...
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The Code That Made me Cry

A friend of mine recently told me about the kind of problems he’s currently struggling with in the legacy application he’s maintaining. Here’s a sample piece of code to illustrate ...
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MongoDB optimistic locking

When moving from JPA to MongoDb you start to realize how many JPA features you’ve previously taken for granted. JPA prevents “lost updates” through both pessimistic and optimistic ...
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Would you dare to change HashMap implementation?

There are bold engineers working for the Oracle nowadays. I came to this conclusion when trying to nail down a Heisenbug yesterday. Not too surprisingly, the bug seemed to disappear ...
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Type Conversion in Spring

Here are few straight cases where we need type conversion: Case #1. To help simplifying bean configurations, Spring supports conversion of property values to and from text values. Each ...
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Top 10 Lists of Common Java Mistakes (That Makes Top 100!)

Top 10 lists are very popular, fun, and informative to read. But there are so many of them! How to choose the right one? Here’s a meta top 10 list helping you find the top 10 top ...
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