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Understanding how OSGI bundles get resolved

I’d like to review how OSGI bundles get resolved and use Apache Karaf to demonstrate. Karaf is a full-featured OSGI container based on the Apache Felix kernel and is the corner stone ...
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A crash course in Scala types

After many years of Java development, discovering Scala’s type system and related features was something of a departure for me. Suffice to say GADT wasn’t my first four letter ...
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XML unmarshalling benchmark: JAXB vs STax vs Woodstox

Introduction Towards the end of last week I started thinking how to deal with large amounts of XML data in a resource-friendly way.The main problem that I wanted to solve was how ...
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The pursuit of protection: How much testing is “enough”?

I’m definitely not a testing expert. I’m a manager who wants to know when the software that we are building is finished, safe and ready to ship. Large-scale enterprise systems – ...
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Estimating the Unknown: Dates or Budgets, Part 1

Almost every manager I know wants to know when a project will be done. Some managers decree when a project will be done. Some managers think they can decree both the date and the feature ...
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Estimating the Unknown: Dates or Budgets, Part 2

In Part 1, you had some knowledge of the team’s velocity. This is the option of when you do not have knowledge of the team’s velocity, because this team has not worked together ...
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Processing 10 million messages with Akka

Akka Actors promise concurrency. What better way to simulate that and see if how much time it takes to process 10 million messages using commodity hardware and software without any ...
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Functional style in Java with predicates – Part 2

In the first part of this article we introduced predicates, which bring some of the benefits of functional programming to object-oriented languages such as Java, through a simple interface ...
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Functional style in Java with predicates – Part 1

You keep hearing about functional programming that is going to take over the world, and you are still stuck to plain Java? Fear not, since you can already add a touch of functional ...
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Apache JMeter: Load Test Whatever You Want

This is the second post about load testing with Apache JMeter, read the first post here: A step by step tutorial about load testing relational databases. JMeter has lots of Samplers. ...
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