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1. JPA Mini Book

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3. JUnit Tutorial for Unit Testing

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How JPA 2.1 has become the new EJB 2.0

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Beauty lies in the eye of the beholder. So does “ease”: Learn more about SQL Result Set Mappings and handle your native query results with ease: http://t.co/WH4BTlClIP #JPA #Java #JavaEE — Thorben Janssen (@thjanssen123) April 15, 2015 Thorben writes very good and useful articles about JPA, and he’s recently started an excellent series about JPA 2.1’s new features. Among which: ...

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Geb Gems: Running Geb Spock tests with Maven

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Geb is framework which makes it easy to create functional tests for your application. Since you can use Groovy, Spock and the elegance of the JQuery selector, you can setup solid functional test very easy. In this blogpost we will make a simple test which will test a functional part of the JDriven website. We will start our test with configuring the ...

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Spark: Generating CSV files to import into Neo4j

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About a year ago Ian pointed me at a Chicago Crime data set which seemed like a good fit for Neo4j and after much procrastination I’ve finally got around to importing it. The data set covers crimes committed from 2001 until now. It contains around 4 million crimes and meta data around those crimes such as the location, type of ...

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Design Patterns in the 21st Century: The Abstract Factory Pattern

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This is part two of my talk, Design Patterns in the 21st Century. This pattern is used everywhere in Java code, especially in more “enterprisey” code bases. It involves an interface and an implementation. The interface looks something like this: public interface Bakery { Pastry bakePastry(Topping topping); Cake bakeCake(); } And the implementation: public class DanishBakery implements Bakery { @Override ...

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Short on Time? Switch to Groovy for Unit Testing

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If you are a programming today, you have most likely heard of Unit Testing or of the Test-Driven Development process. I have yet to run into a programmer that has not heard of both, nor one that says Unit Testing isn’t important. In casual discussions, most programmers seem to feel that Unit Tests are very important and that Test-Driven Development ...

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KISS With Essential Complexity

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Accidental complexity, in a broader sense, is the complexity that developers add to their code and that is not necessary for the code to work. That may include overengineering, overuse of design patterns, poor choice of tools, frameworks and paradigms, writing snippets of code in a hard to read way. For example, if you can do a project with a ...

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Docker MySQL Persistence

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One of the recipes in 9 Docker recipes for Java developers  is using MySQL container with WildFly. Docker containers are ephemeral, and so any state stored in them is gone after they are terminated and removed. So even though MySQL container can be used as explained in the recipe, DDL/DML commands can be used to persist data, but that state is lost, or at least not ...

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