[jira] [Created] (DELTASPIKE-315) Provide a producer for EntityManagerFactories

["Mark Struberg (JIRA)" <ji...@apache.org>]

Mark Struberg created DELTASPIKE-315:
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             Summary: Provide a producer for EntityManagerFactories
                 Key: DELTASPIKE-315
                 URL: https://issues.apache.org/jira/browse/DELTASPIKE-315
             Project: DeltaSpike
          Issue Type: Bug
          Components: JPA-Module
    Affects Versions: 0.3-incubating
            Reporter: Mark Struberg
            Assignee: Mark Struberg
             Fix For: 0.4-incubating


I found myself using the following pattern quite often in projects in the last time. I have a @Qualifier UnitName(value) and a producer for a @Dependent EntityManagerFactory for it. The configuration is mostly provided via the persistenceProperties Map in EntityManagerFactory#createEntityManagerFactory(unitname, persistenceProperties);
We can further tweak the config lookup path and define a route which makes the most sense.

This can be used to create the EntityManager producer very easily.

@ApplicationScoped
public class MyEntityManagerProducer {
  private @Inject @UnitName("orderUnit") EntityManagerFactory emf;
  
  @Produces @RequestScoped
  public EntityManager createEm() {
    return emf.createEntityManager();
  }
  .. + disposer 
}



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