org.hibernate.search.jsr352.jberet.context.jpa.impl

Class CDIEntityManagerFactoryRegistry

java.lang.Object

org.hibernate.search.jsr352.jberet.context.jpa.impl.CDIEntityManagerFactoryRegistry

All Implemented Interfaces:

EntityManagerFactoryRegistry

@Singleton
public class CDIEntityManagerFactoryRegistry
extends Object
implements EntityManagerFactoryRegistry

An EntityManagerFactoryRegistry that retrieves the entity manager factory from the CDI context by its bean name.

When calling getDefault(), the single registered EntityManagerFactory bean will be returned, or if there is none the entity manager factory will be retrieved using a @PersistenceUnit annotation.

When calling get(String) or get(String, String), the reference will be interpreted as a Named qualifier.

Caution: EntityManagerFactory are not considered as beans per default, and thus can't be retrieved without a specific user configuration. In order for retrieval by name to work, users should have producer methods expose the entity manager factories in their context, for instance like this:

@ApplicationScoped
public class EntityManagerFactoriesProducer {

        @PersistenceUnit(unitName = "db1")
        private EntityManagerFactory db1Factory;

        @PersistenceUnit(unitName = "db2")
        private EntityManagerFactory db2Factory;

        @Produces
        @Singleton
        @Named("db1") // The name to use when referencing the bean
        public EntityManagerFactory createEntityManagerFactoryForDb1() {
                return db1Factory;
        }

        @Produces
        @Singleton
        @Named("db2") // The name to use when referencing the bean
        public EntityManagerFactory createEntityManagerFactoryForDb2() {
                return db2Factory;
        }
}
 

Note that retrieving an EntityManagerFactory by its persistence unit name is not supported, because CDI does not offer any API allowing to achieve it dynamically. Indeed:

• @PersistenceUnit is not a qualifier annotation, so the usual CDI approaches for retrieving a bean dynamically (Instance.select, BeanManager.getBeans, ...) won't work.
• there is no way to inject all the persistence units (so we could filter them and select one by its name) because @PersistenceUnit does not work on a Instance<EntityManagerFactory> (at least not with Weld).

Author:

Yoann Rodiere

Constructor Summary

Constructors

Constructor and Description
CDIEntityManagerFactoryRegistry()

Method Summary

Modifier and Type	Method and Description
javax.persistence.EntityManagerFactory	get(String reference)
javax.persistence.EntityManagerFactory	get(String namespace, String reference)
javax.persistence.EntityManagerFactory	getDefault()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CDIEntityManagerFactoryRegistry

public CDIEntityManagerFactoryRegistry()

Method Detail

getDefault

public javax.persistence.EntityManagerFactory getDefault()

Specified by:

getDefault in interface EntityManagerFactoryRegistry

get

public javax.persistence.EntityManagerFactory get(String reference)

Specified by:

get in interface EntityManagerFactoryRegistry

get

public javax.persistence.EntityManagerFactory get(String namespace,
                                                  String reference)

Specified by:

get in interface EntityManagerFactoryRegistry