Question

My current working code:

EntityManagerFactory emf = javax.persistence.Persistence.createEntityManagerFactory("TT-SpringMVCPU");
EntityManager em = emf.createEntityManager();

I would like to replace that with something like this:

@PersistenceContext(unitName = "TT-SpringMVCPU")
private EntityManager _entityManager;

When I try that, I get this error:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'showController': Injection of persistence dependencies failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'TT-SpringMVCPU' is defined
    org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessPropertyValues(PersistenceAnnotationBeanPostProcessor.java:341)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1074)
    org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
...

What did I forget to configure?

Answer 1

From the Spring reference manual: Three options for JPA setup in a Spring environment