I am setting up a new project using Tomcat, Weld (for CDI) and DeltaSpike (Data, JPA and JSF modules)
I have reached the point now where I am trying to create a JPA repository (backed by Hibernate) by following the directions in the DeltaSpike documentation (http://deltaspike.apache.org/documentation/data.html).
I am struggling to hook up the persistence unit in the way the documentation describes as my EntityManagerFactory object is always null
import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.inject.Disposes;
import javax.enterprise.inject.Produces;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceUnit;
public class EntityManagerProducer {
@PersistenceUnit(unitName = "srdPersistenceUnit")
private EntityManagerFactory emf;
@Produces // you can also make this @RequestScoped
public EntityManager create() {
return emf.createEntityManager();
}
public void close(@Disposes EntityManager em) {
if (em.isOpen()) {
em.close();
}
}
}
I have created a persistence.xml file which is in the /META-INF/ directory of the jar file that contains my service/data layer
<persistence version="2.0"
xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="srdPersistenceUnit" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<non-jta-data-source>java:comp/env/jdbc/srdDCP</non-jta-data-source>
<properties>
</properties>
</persistence-unit>
</persistence>
I was previously using Spring to handle dependency injection and the JPA stuff which worked fine so I know my data source is set up correctly as a Tomcat JNDI resource.
Now however I see this exception (suggesting that the EntityManagerFactory is not being injected)
Caused by: java.lang.NullPointerException
at testproj.data.entity.EntityManagerProducer.create(EntityManagerProducer.java:18)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.jboss.weld.injection.StaticMethodInjectionPoint.invoke(StaticMethodInjectionPoint.java:88)
at org.jboss.weld.injection.StaticMethodInjectionPoint.invoke(StaticMethodInjectionPoint.java:78)
at org.jboss.weld.injection.producer.ProducerMethodProducer.produce(ProducerMethodProducer.java:95)
at org.jboss.weld.injection.producer.AbstractMemberProducer.produce(AbstractMemberProducer.java:167)
at org.jboss.weld.bean.AbstractProducerBean.create(AbstractProducerBean.java:183)
at org.jboss.weld.context.unbound.DependentContextImpl.get(DependentContextImpl.java:69)
at org.jboss.weld.bean.ContextualInstanceStrategy$DefaultContextualInstanceStrategy.get(ContextualInstanceStrategy.java:101)
at org.jboss.weld.bean.ContextualInstance.get(ContextualInstance.java:50)
at org.jboss.weld.manager.BeanManagerImpl.getReference(BeanManagerImpl.java:761)
at org.jboss.weld.bean.builtin.InstanceImpl.getBeanInstance(InstanceImpl.java:179)
at org.jboss.weld.bean.builtin.InstanceImpl.get(InstanceImpl.java:99)
at org.apache.deltaspike.data.impl.handler.EntityManagerLookup.lookupFor(EntityManagerLookup.java:58)
at org.apache.deltaspike.data.impl.handler.QueryHandler.createContext(QueryHandler.java:104)
at org.apache.deltaspike.data.impl.handler.QueryHandler.invoke(QueryHandler.java:77)
I suspect I have missed something in the setting up of the persistence unit.
What more do I need to do to create a valid persistence unit backed by hibernate jpa linked to my datasource?
