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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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Tutorial: Hibernate, JPA & Spring MVC – Part 2

This tutorial will show you how to take a basic Hibernate/JPA app, convert it into a Spring MVC web project to be able to view the database in a web browser, and finally use Spring’s ...
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Tutorial: Hibernate, JPA – Part 1

This is the first part of tutorial about using Hibernate and JPA. This part is an introduction to to JPA and Hibernate. The second part will look at putting together a Spring MVC application ...
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Apache Shiro Part 2 – Realms, Database and PGP Certificates

This is second part of series dedicated to Apache Shiro. We started previous part with simple unsecured web application. When we finished, the application had basic authentication ...
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Learn by Errors : Java + OSGi

Recently I worked on getting Apache Hive work inside an OSGi environment. While not proving to be a proverbial piece of cake (software right?.. Why am I not surprised? ), it led ...
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