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JPA tutorial: Mapping Entities – Part 1

In this article I will discuss about the entity mapping procedure in JPA. As for my examples I will use the same schema that I used in one of my previous articles. In my two previous ...
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How to build and clear a reference data cache with singleton EJBs and MBeans

In one of my projects I had a requirement to load reference data from several sources in a Java EE 6 WebLogic environment, with EclipseLink as ORM framework. Since I couldn’t find ...
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How Nashorn Impacts API Evolution on a New Level

Following our previous article about how to use jOOQ with Java 8 and Nashorn, one of our users discovered a flaw in using the jOOQ API as discussed here on the user group. In essence, ...
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How to Access a Git Repository with JGit

A Git repository is represented in JGit through the Repository class that can be viewed as a handle to a repository. With a Repository instance, you can create JGit commands (through ...
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Using @ConfigurationProperties in Spring Boot

In my latest blog post I described shortly how one can configure mail in Spring Boot application. To inject properties into the configuration I used Spring’s @Value annotation. But ...
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Property-based testing with Spock

Property based testing is an alternative approach to testing, complementing example based testing. The latter is what we’ve been doing all our lives: exercising production code ...
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Maven Common Problems and Pitfalls

Love it or hate it (and a lot of people seem to hate it), Maven is a widely used tool by 64% of Java developers (source – Java Tools and Technologies Landscape for 2014). Most experienced ...
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Processing Java Annotations Using Reflection

In my previous article covering Java Annotations, I outlined a recent use case and provided you with some examples of custom annotations and how they might be used. In this article, ...
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AngularJS: Different ways of using Array Filters

AngularJS provides filter feature which can be used to format input value or to filter an Array with the given matching input criteria. For example you can use ‘date’ filter ...
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JUnit in a Nutshell: Unit Test Assertion

This chapter of JUnit in a Nutshell covers various unit test assertion techniques. It elaborates on the pros and cons of the built-in mechanism, Hamcrest matchers and AssertJ assertions. ...
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