Multiple database with Spring+Hibernate+JPA

Question

I\'m trying to configure Spring+Hibernate+JPA for work with two databases (MySQL and MSSQL).

My datasource-context.xml:

Answer 1

If you follow this tutorial, http://www.javacodegeeks.com/2010/05/jboss-42x-spring-3-jpa-hibernate.html you can make the following changes to access two different databases:

1. persistence.xml, define a second pesristence-unit for your second database.
2. spring.xml, define a second entityManagerFactory bean under a different name, lets say "entityManagerFactoryDB2" and configure it to use the persistent unit for the second database.

3. for every DAO you want to access the second database include the following :

   @Autowired
   private EntityManagerFactory entityManagerFactoryDB2;
   
   @PostConstruct
   public void init() {
       super.setEntityManagerFactory(entityManagerFactoryDB2);
   }
   

Thats all!

On spring service classes, use the DAOs as usual!