Readme.md



Hibernate JPA 2 project template

Usage:
A basic JPA CRUD example

General:
This project contains:


src/main/resources/META-INF/persistence.xml
Two persistence units offering a »drop-and-create«
(re-creating schema) and a »strategy_none« (don't touch)JDBC database
connection to a Mysql 5 server. You may want to adjust both database
type and connection parameters.


Important classes (package root de.hdm_stuttgart.mi.sda1 omitted
for brevity):


File / Class
Description


...model.StudyCourse
Class representing study courses


...CreateStudyCourse
Persisting a study course


...ReadStudyCourseById
Retrieving a study course database instance by primary key


src/main/resources/log4j2.xml Configuring the log4j subsystem.

On executing i.e. »mvn install« Maven will
[generate]
(https://docs.jboss.org/hibernate/orm/current/topical/html_single/metamodelgen/MetamodelGenerator.html)
metamodel classes like StudyCourse_.java during the
»generate-sources« phase. These classes are being required for
[typesafe criteria based queries]
(http://docs.jboss.org/hibernate/entitymanager/3.6/reference/en/html/querycriteria.html#querycriteria-typedquery)
not being used in this project.

Targets:


mvn test
Creating and re-reading a database instance of StudyCourse.
Connection parameters being defined twice in two persistence units in
src/main/resources/META-INF/persistence.xml.


mvn package
Creating an executable jar persisting an StudyCourse instance to be
run like e.g.:
java -jar target/intro-1.0.jar