_{while this project is many years old, and only runs with a pre 11 Java, the principles still apply}

What is "Money Making Project"?

A very simple example on how to use Spring and Hibernate together

Who would need such an example?

There are plenty of good examples from Spring and Hibernate themselves. This one is aimed to bring the two together mostly for people who "heard" things about the two, read about it, but having a "practical difficulty" to combine them.

What's with a title!?

Well, if you take a look at APIs, you'll see a "MoneyMakingBusinessService" with a "makeMoney" method. So technically, each time you run "CleverMoneyMakingBusinessServiceIntegrationTest", you'd be making some money.

And, of course, if you master Spring & Hibernate, and find yourself a gig, you'll be making even more.

What's inside

Spring and Hibernate based project that demos simple things such as:

A way to structure a project

Maven based structure ( hence can be easily used by gradle ). Configuration and property files organized under "META-INF/conf", "META-INF/props", etc..

A way to separate Spring configs

"tx-spring-config.xml", "persistence-spring-config.xml", "service-spring-config.xml", "repository-spring-config.xml" and "application-context.xml" that includes them all

Properties via PropertyPlaceholderConfigurer

<context:property-placeholder location="classpath:META-INF/props/env.properties"/>

Hibernate overall configuration file

That is injected into AnnotationSessionFactoryBean

Hibernate Named Queries

That are linked to the Hibernate overall config ( <mapping resource="META-INF/conf/hibernate/mapping/startup-bank-named-queries.xml"/> )

Spring's DAO / Hibernate Exception Translation

Via @Repository and "PersistenceExceptionTranslationPostProcessor"

Simple CRUD Repository

public interface MoneyRepository {

	public void make( MoneyRoll moneyRoll );       // C
	public MoneyRoll find( Long id );              // R
	public void update( MoneyRoll moneyRoll );     // U
	public void takeOut( MoneyRoll moneyRoll );    // D
}

with a Hibernate based implementation

Transaction Management with Spring AOP

Declarative, on a Service Level, using "aop:config", "tx:advice" namespaces

Spring Testing

With SpringJUnit4ClassRunner, ContextConfiguration, etc..

Using Embeded in-memory H2 Database for Testing

<jdbc:embedded-database id="dataSource" type="H2"/>

Hibernate Logging

Most useful hibernate "log4j.logger" properties

Demoing how important Transaction is for Hibernate Sessions

"HibernateSessionNotBoundToThreadIntegrationTest" for the second (after LazyInitializationException ) most common Hibernate exception: "No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here"

TODO: provide some JPA examples, although, it most likely deserves a separate project to keep things simple