Inject CDI is not working with producer on a project . jar

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I created an Entitymanager producer in a project .jar but the same does not work.

I configured POM.XML with the dependency below

<!--  CDI -->   
<dependency>
   <groupId>javax.enterprise</groupId>
    <artifactId>cdi-api</artifactId>
    <version>1.2</version>  
</dependency>

  • I created an empty Beans.xml file in src/main/Resources/META-INF

  • I created a producer file according to abaix

    import javax.enterprise.inject.Disposes;
import javax.enterprise.inject.Produces;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;

public class JpaUtil {

    private static final String PERSISTENCE_UNIT = "PEROLAWEB";

    private static ThreadLocal<EntityManager> threadEntityManager = new ThreadLocal<EntityManager>();

    private static EntityManagerFactory entityManagerFactory;

    @Produces 
    public EntityManager geraEM(){

        System.out.println("\n---------- injectou EntityManeger Criou ");

        if( entityManagerFactory == null || !entityManagerFactory.isOpen()) {
            entityManagerFactory = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT);
        }

        EntityManager entityManager = threadEntityManager.get();
        if(entityManager == null || !entityManager.isOpen() ) {
            entityManager = entityManagerFactory.createEntityManager();
            JpaUtil.threadEntityManager.set(entityManager);
        }
        return entityManager;
    }

    public void finaliza(@Disposes EntityManager entityManager) {

        System.out.println("\n---------- destruiu EntityManeger Criou ");
        if(entityManager!=null){
            EntityTransaction entityTransaction = entityManager.getTransaction();
            if(entityTransaction.isActive()){
                if(entityTransaction.getRollbackOnly()) {
                    entityTransaction.rollback();
                }else{
                    entityTransaction.commit();
                }
            }   
            entityManager.close();
            threadEntityManager.set(null);
        }
    }

}
  • I did the test below but returns:

java.lang.Nullpointerexception in the entityManager.getTransaction() line. Begin();** 

import javax.inject.Inject;
import javax.persistence.EntityManager;
import org.junit.Assert;
import org.junit.Test;

public class TesteEntityManagerFactory {

    @Inject 
    private EntityManager entityManager;

    @Test
    public void testeDeConexao(){
        entityManager.getTransaction().begin();
        Assert.assertTrue(entityManager.getTransaction().isActive() );
    }


}
java cdi
  • 1

    When you run junit the CDI is not initialized, so the objects are not instantiated. Use jGlue to test, below: http://jglue.org/cdi-unit/. Add dependency and follow this tutorial for use: http://jglue.org/cdi-unit-user-guide/.

  • Well that, thank you.

  • 1

    Blz. I put an answer to leave registered and help others who have the same problem. Hugs

  • See if you can help me.

  • You are placing this jar inside a container(wildfly, jboss, glassfish)?

  • Not right now. The idea is to create a jar that I will use in several War projects. In other words, I am creating a jar project that Maven will include in a War

  • Let’s go continue this discussion in chat.

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1 answer

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The CDI needs a container to work properly. As you are running tests with junit, there is no container for the CDI. To solve this, you can use the jGlue or the Arquillian. If using jGlue just add the following dependency:

<dependency>
  <groupId>org.jglue.cdi-unit</groupId>
  <artifactId>cdi-unit</artifactId>
  <version>3.1.2</version>
  <scope>test</scope>
</dependency>

and place the following annotation in your test class: @RunWith(CdiRunner.class)

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