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Installing Logstash v 1.4 (and Greater) on FreeBSD

In a previous post I described how to install Logstash (v. 1.3 and previous) on FreeBSD and in this post I will describe how to install Logstash v. 1.4 and greater. Until version 1.3 ...
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Difference between Abstract Class and Interface in java

Some of the popular interview questions are “What are the differences between abstract class and interface”, “When will you use abstract class and when will you use ...
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Microservice Architecture – A Quick Guide

1. What is Architecture (Software)? Architecture is the fundamental organization of a system embodied in its components (i.e. Web Server, Application Server, Databases,Storage, Communication ...
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Better error messages with Bean Validation 1.1 in Spring MVC application

Bean Validation 1.1, among many new features, introduced error message interpolation using Unified Expression Language (EL) expressions. This allows to define error messages based on ...
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Java EE7 and Maven project for newbies – part 6

Resuming from the previous parts Part #1, Part #2, Part #3, Part #4, Part #5 In the previous post (part 5), we discovered how we can unit test using Arquillian, our EJB services, ...
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Saving preferences in your Android application

This is the third post in my series about saving data in Android. The other posts can be found here : http://www.javacodegeeks.com/2014/06/introduction-how-to-save-data-in-your-android-application.html http://www.javacodegeeks.com/2014/06/saving-data-to-a-file-in-your-android-application.html A ...
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Spring Boot: Fast MVC start

I was planning to write an article about Spring Boot more than a year ago. Finally I have the time and inspiration for this. So prepare yourself for 10 – 15 minutes of high quality ...
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The hi/lo algorithm

Introduction In my previous post I talked about various database identifier strategies, you need to be aware of when designing the database model. We concluded that database sequences ...
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I Don’t Think That Software Development Word Means What You Think It Means

There are several terms used inappropriately or incorrectly in software development. In this post, I look at some of these terms and the negative consequences of misuse of these terms. “agile” The ...
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A little bit on the JVM and JIT

As you might be aware, the JVM (Java Virtusal Machine) is what makes it possible for Java to adhere to the write-once-run-anywhere paradigm. At its core, the JVM consists of the following ...
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