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…

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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…

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HashMap performance improvements in Java 8

HashMap<K, V> is fast, versatile and ubiquitous data structure in every Java program. First some basics. As you probably know,…

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Automated bug finding with git bisect and mvn test

Do you know the feeling when you discover a bug in a functionality that was working couple of weeks (or…

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Simplifying ReadWriteLock with Java 8 and lambdas

Considering legacy Java code, no matter where you look, Java 8 with lambda expressions can definitely improve quality and readability.…

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Custom Spring namespaces made easier with JAXB

First of all, let me tell this out loud: Spring is no longer XML-heavy. As a matter of fact you…

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Three flavours of request-response pattern in Akka

Imagine a simple Akka actor system consisting of two parties: MonitoringActor and NetworkActor. Whenever someone (client) sends CheckHealth to the…

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Turning Twitter4J into RxJava’s Observable

aTwitter4J is a Java wrapper around Twitter API. While Twitter supports simple request-response interactions in this article we will explore…

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Proxies done right with Guava’s AbstractInvocationHandler

Not too often but sometimes we are forced to write custom dynamic proxy class using java.lang.reflect.Proxy. There is really no…

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