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Writing Clean Tests – Replace Assertions with a Domain-Specific Language

It is pretty hard to figure out a good definition for clean code because everyone of us has our own definition for the word clean. However, there is one definition which seems to be ...
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Java 8 Friday: Most Internal DSLs are Outdated

At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every ...
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Java EE7 and Maven project for newbies – part 4 – defining the ear module

Resuming from the previous parts Part #1 Part #2 Part #3 We are resuming for the 4th part, our simple project currently hasa web maven module (a war) an ejb module (ejb)  holding ...
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Simplifying trading system with Akka

My colleagues are developing a trading system that processes quite heavy stream of incoming transactions. Each transaction covers one Instrument (think bond or stock) and has some (now) ...
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The data knowledge stack

Concurrency is not for the faint-hearted We all know concurrency programming is difficult to get it right. That’s why threading tasks are followed by extensive design and code reviewing ...
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Adding WS-Security over soap using Apache Camel

WS-Security (Web Services Security) is a protocol which allows you to secure your soap web services. The client, who makes the soap request, has to provide a login and a password in ...
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Spring Integration Java DSL sample

A new Java based DSL has now been introduced for Spring Integration which makes it possible to define the Spring Integration message flows using pure java based configuration instead ...
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Java 8 StampedLocks vs. ReadWriteLocks and Synchronized

Synchronized sections are kind of like visiting your parents-in-law. You want to be there as little as possible. When it comes to locking the rules are the same – you want to spend ...
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InterruptedException and interrupting threads explained

If InterruptedException wasn’t checked exception, probably no one would even notice it – which would actually prevent couple of bugs throughout these years. But since it ...
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Law of Demeter in Java – Principle of least Knowledge – Real life Example

Law of Demeter also known as principle of least knowledge is a coding principle, which says that a module should not know about the inner details of the objects it manipulates. If ...
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