= Descritores alternativos
:index-group: Testing Techniques
:jbake-type: page
:jbake-status: published


Ver link:../../../alternate-descriptors.html[Descritores alternativos] para todos os detalhes de como funciona esta característica.


Para nosso exemplo usaremos o código padrão "moviefun" que tem uma entidade `Movie` e um bean de sessão `Movies`.
Para variar o modo de como testar e demonstrar os descritores alternativos, criaremos um interceptor que só será usado em nossos casos de teste.

Para adicionar isso a nossa aplicação, somente precisamos de um `test.ejb-jar.xml` na mesma localização que o `ejb-jar.xml`.

Isso nós da os seguintes arquivos em nosso projeto:

 - `src/main/resources/META-INF/ejb-jar.xml`
 - `src/main/resources/META-INF/persistence.xml`
 - `src/main/resources/META-INF/test.ejb-jar.xml`

== O test.ejb-jar.xml

O comum `ejb-jar.xml` simplesmente contém `<ejb-jar/>`, no entanto, nós adicionamos um interceptor extra para `test.ejb-jar.xml`  :

[source,xml]
----
    <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
    <ejb-jar xmlns="http://java.sun.com/xml/ns/javaee">
      <assembly-descriptor>
        <interceptor-binding>
          <ejb-name>Movies</ejb-name>
          <interceptor-class>org.superbiz.altdd.MoviesTest$Interceptor</interceptor-class>
        </interceptor-binding>
      </assembly-descriptor>
    </ejb-jar>
----

== Caso de Teste

Para habilitar nosso `test.ejb-jar.xml` no caso de teste, simplesmente consertamos a propriedade `openejb.altdd.prefix` quando criamos o `EJBContainer` embutido :

[source,java,numbered]
----
public class MoviesTest extends TestCase {

 @EJB
 private Movies movies;

 @Resource
 private UserTransaction userTransaction;

 @PersistenceContext
 private EntityManager entityManager;

 public void setUp() throws Exception {
     Properties p = new Properties();
     p.put("movieDatabase", "new://Resource?type=DataSource");
     p.put("movieDatabase.JdbcDriver", "org.hsqldb.jdbcDriver");
     p.put("movieDatabase.JdbcUrl", "jdbc:hsqldb:mem:moviedb");

     p.put("openejb.altdd.prefix", "test");

     EJBContainer.createEJBContainer(p).getContext().bind("inject", this);
 }

 public void test() throws Exception {

     userTransaction.begin();

     try {
         entityManager.persist(new Movie("Quentin Tarantino", "Reservoir Dogs", 1992));
         entityManager.persist(new Movie("Joel Coen", "Fargo", 1996));
         entityManager.persist(new Movie("Joel Coen", "The Big Lebowski", 1998));

         List<Movie> list = movies.getMovies();
         assertEquals("List.size()", 3, list.size());

         for (Movie movie : list) {
             movies.deleteMovie(movie);
         }

         assertEquals("Movies.getMovies()", 0, movies.getMovies().size());

     } finally {
         try {
             userTransaction.commit();
             fail("Transaction should have been rolled back");
         } catch (RollbackException e) {
             // Good, we don't want to clean up the db
         }
     }
 }

 public static class Interceptor {

     @Resource
     private SessionContext sessionContext;

     @AroundInvoke
     public Object invoke(InvocationContext context) throws Exception {

         sessionContext.setRollbackOnly();

         return context.proceed();
     }
 }
}
----

Como se pode notar no link:../../../alternate-descriptors.html[Descritores alternativos], podem usar muitos prefixos ao mesmo tempo.

== Testando

[source,bash]
----
-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running org.superbiz.altdd.MoviesTest
Apache OpenEJB 4.0.0-beta-1    build: 20111002-04:06
http://tomee.apache.org/
INFO - openejb.home = /Users/dblevins/examples/alternate-descriptors
INFO - openejb.base = /Users/dblevins/examples/alternate-descriptors
INFO - Using 'javax.ejb.embeddable.EJBContainer=true'
INFO - Configuring Service(id=Default Security Service, type=SecurityService, provider-id=Default Security Service)
INFO - Configuring Service(id=Default Transaction Manager, type=TransactionManager, provider-id=Default Transaction Manager)
INFO - Configuring Service(id=movieDatabase, type=Resource, provider-id=Default JDBC Database)
INFO - Found EjbModule in classpath: /Users/dblevins/examples/alternate-descriptors/target/classes
INFO - Beginning load: /Users/dblevins/examples/alternate-descriptors/target/classes
INFO - AltDD ejb-jar.xml -> file:/Users/dblevins/examples/alternate-descriptors/target/classes/META-INF/test.ejb-jar.xml
INFO - Configuring enterprise application: /Users/dblevins/examples/alternate-descriptors
WARN - Method 'lookup' is not available for 'javax.annotation.Resource'. Probably using an older Runtime.
INFO - Configuring Service(id=Default Stateful Container, type=Container, provider-id=Default Stateful Container)
INFO - Auto-creating a container for bean Movies: Container(type=STATEFUL, id=Default Stateful Container)
INFO - Configuring Service(id=Default Managed Container, type=Container, provider-id=Default Managed Container)
INFO - Auto-creating a container for bean org.superbiz.altdd.MoviesTest: Container(type=MANAGED, id=Default Managed Container)
INFO - Configuring PersistenceUnit(name=movie-unit)
INFO - Auto-creating a Resource with id 'movieDatabaseNonJta' of type 'DataSource for 'movie-unit'.
INFO - Configuring Service(id=movieDatabaseNonJta, type=Resource, provider-id=movieDatabase)
INFO - Adjusting PersistenceUnit movie-unit <non-jta-data-source> to Resource ID 'movieDatabaseNonJta' from 'movieDatabaseUnmanaged'
INFO - Enterprise application "/Users/dblevins/examples/alternate-descriptors" loaded.
INFO - Assembling app: /Users/dblevins/examples/alternate-descriptors
INFO - PersistenceUnit(name=movie-unit, provider=org.apache.openjpa.persistence.PersistenceProviderImpl) - provider time 411ms
INFO - Jndi(name="java:global/alternate-descriptors/Movies!org.superbiz.altdd.Movies")
INFO - Jndi(name="java:global/alternate-descriptors/Movies")
INFO - Jndi(name="java:global/EjbModule1893321675/org.superbiz.altdd.MoviesTest!org.superbiz.altdd.MoviesTest")
INFO - Jndi(name="java:global/EjbModule1893321675/org.superbiz.altdd.MoviesTest")
INFO - Created Ejb(deployment-id=Movies, ejb-name=Movies, container=Default Stateful Container)
INFO - Created Ejb(deployment-id=org.superbiz.altdd.MoviesTest, ejb-name=org.superbiz.altdd.MoviesTest, container=Default Managed Container)
INFO - Started Ejb(deployment-id=Movies, ejb-name=Movies, container=Default Stateful Container)
INFO - Started Ejb(deployment-id=org.superbiz.altdd.MoviesTest, ejb-name=org.superbiz.altdd.MoviesTest, container=Default Managed Container)
INFO - Deployed Application(path=/Users/dblevins/examples/alternate-descriptors)
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 2.569 sec

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
----

== Aviso sobre ferramentas

Se você dividir os descritores em diretórios diferentes, esse suporte não funcionará. Especialmente, isso :

 - `src/main/resources/META-INF/ejb-jar.xml`
 - `src/main/resources/META-INF/persistence.xml`
 - `src/**test**/resources/META-INF/test.ejb-jar.xml`


Este suporte ** não ** ** é compatível com Maven, Gradle, Ant, IntelliJ, NetBeans, Eclipse ou outras configurações.