jpa, datanucleus, enhancement, hibernate, eclipselink, gradle, weaving

DataNucleus JPA Enhancement with Gradle

A notable behavior of JPA providers is to enhance JPA classes, by modifying their bytecode to add few capabilities. DataNucleus (DN) currently provides a Maven Plugin for calling its Enhancer. This article walks through calling DN Enhancer in a Gradle build script in a very efficient way.

junit, tests, postgresql, h2, hsqldb, java, spring

Running Java Integration Tests against a PostgreSQL Embedded database

Today, I'm going to walk you through running integration tests on the JVM against a real production-like PostgreSQL database. All without losing in terms of overall testing time or performance (especially when you have a database with hundreds of tables). In-memory databases (e.g., H2 [http://www.h2database.com/html/main.html], HSQLDB [http://hsqldb.org/], SQLite [https://www.sqlite.org/inmemorydb.html], ...) are very often used as drop-in replacements when running integration tests. This is ge

Saving a read-only file edited with Vi/Vim

How to save a read-only file edited with Vi or Vim without losing your changes