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1. JPA Mini Book

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3. JUnit Tutorial for Unit Testing

4. Java Annotations Tutorial

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Caching Strategy Reminder for Maven-Based Docker Builds

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My local development feedback loop between code change and runnable container was annoyingly long on a Maven-based project I was recently working on. I wanted to speed things up. The scenario was something like this:             touch/change some source code docker build maven downloads the world maven compiles my project docker run touch/change some source ...

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How to integrate Jersey in a Spring MVC application

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I have recently started to build a public REST API with Java for Podcastpedia.org and for the JAX-RS implementation I have chosen Jersey, as I find it “natural” and powerful – you can find out more about it by following the Tutorial – REST API design and implementation in Java with Jersey and Spring.  Because Podcastpedia.org is a web application powered by Spring ...

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Book Review: Mockito Essentials

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The subtitle of Sujoy Acharya‘s Mockito Essentials (Packt Publishing, October 2014) is: “A practical guide to get you up and running with unit testing using Mockito.” The Preface and seven chapters in Mockito Essentials span approximately 190 substantive pages. Preface In the Preface, author Sujoy Acharya writes that Mockito Essentials “is an advanced-level guide that will help software developers to ...

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Lambda Architecture for Big Data

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An increasing number of systems are being built to handle the Volume, Velocity and Variety of Big Data, and hopefully help gain new insights and make better business decisions. Here, we will look at ways to deal with Big Data’s Volume and Velocity simultaneously, within a single architecture solution. Volume + Velocity Apache Hadoop provides both reliable storage (HDFS) and a processing system (MapReduce) for large data ...

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Regression

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When we think of regression, we think of bugs. That’s the first thing that pops into our minds. As with many other things, there’s a deeper meaning, if we just look closer. We have two kinds of usage for the word regression. We use it to describe a test suite that we run at the end of specific functional testing, ...

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Apache Mesos : Writing your own distributed frameworks

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In the previous post, we saw what mesos is, how is it useful and getting started with it. In this post, we shall see how to write your own framework on mesos. (In mesos, a framework is any application running on it.) This post explains about a framework called “mesos-pinspider” which fetches the user profile information and user board information ...

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How To Process Java Annotations

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One of the cool new features of Java 8 is the support for lambda expressions. Lambda expressions lean heavily on the FunctionalInterface annotation. In this post, we’ll look at annotations and how to process them so you can implement your own cool features. Annotations Annotations were added in Java 5. The Java language comes with some predefined annotations, but you ...

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How to Be Honest and Keep a Customer

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Most of our clients are rather surprised when we explain to them that they will have full access to the source code from the first day of the project. We let them see everything that is happening in the project, including the Git repository, bug reports, discussions between programmers, continuous integration fails, etc. They often tell me that other software ...

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Notes: Microservices by Martin Fowler

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I just watched Martin Fowler’s talk about Microservices at XConf. Here are some of my notes and related thoughts. The talk is heavily based upon Martin Fowler and James Lewis’ article about Microservices, so you can find and read most of the information there. Characteristics of Microservices In his article, Fowler defines some characteristics that most of the already existing ...

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