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Neo4j: Cypher – Avoiding the Eager

  Although I love how easy Cypher’s LOAD CSV command makes it to get data into Neo4j, it currently breaks the rule of least surprise in the way it eagerly loads in all rows ...
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Akka Notes – Child Actors and ActorPath – 6

Actors are completely hierarchical. Whatever Actors that you create HAS to be a child of some other Actor. Let’s analyze that a bit : Path Say, we create an ActorRef using ActorSystem.actorOf ...
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Why to use String

Recently I was tutoring juniors during a training session. One of the task was to write a class that can dwarwle maps based on some string key. The result one of the juniors created ...
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Java Extension Mechanism Loads All JARs

The Java Extension Mechanism is described in the Java Tutorial as a “standard, scalable way to make custom APIs available to all applications running on the Java platform.” ...
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Docker RabbitMQ cluster

I have been trying to create a Docker based RabbitMQ cluster on and off for sometime and got it working today – fairly basic and flaky but could be a good starting point for others ...
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Akka Notes – Actor Lifecycle – Basic – 5

(Please note that this lifecycle write-up does not cover the preRestart or the postRestart methods. We’ll talk about them when we discuss supervision) The basic Actor lifecycle ...
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Agile tester part 2, questions and answers

Warning: The opinions expressed in this post are mine only, please do not use them against any other group of people, but only against me, that is Augusto Evangelisti a.k.a. Gus. After ...
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Supercharged jstack: How to Debug Your Servers at 100mph

A guide for using jstack to debug live Java production servers jstack is like U2 – it’s been with us since the dawn of time, and we can’t seem to be rid of it. Jokes aside, ...
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Is Your Culture Working the Way You Think it Is?

Long ago, I was a project manager and senior engineer for a company undergoing a Change Transformation. You know the kind, where the culture changes, along with the process. The senior ...
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4 Biggest Reasons Why Software Developers Suck at Estimation

Estimation is difficult. Most people aren’t good at it–even in mundane situations. For example, when my wife asks me how much longer it will take me to fix some issue I’m working ...
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