我在 tomcat 7 上使用 Hibernate 和 Weld CDI 运行一个项目。我编写了一个 ServletContextListener 来在应用程序启动期间创建 EntityManagerFactory 和 EntityManager。
public class PersistenceListener implements ServletContextListener {
private static EntityManagerFactory entityManagerFactory;
public void contextInitialized(ServletContextEvent sce){
ServletContext context = sce.getServletContext();
entityManagerFactory = Persistence.createEntityManagerFactory("hibernate-test");
}
public void contextDestroyed(ServletContextEvent sce) {
entityManagerFactory.close();
}
public static EntityManager createEntityManager() {
if (entityManagerFactory == null) {
throw new IllegalStateException("Context is not initialized yet.");
}
return entityManagerFactory.createEntityManager();
}
}
我可以在我的测试类中使用我的 entityManager（它是一个 arquillian 测试类），只需通过以下代码创建它
EntityManager em = PersistenceListener.createEntityManager();
em.getTransaction().begin();
em.createQuery("delete from Game").executeUpdate();
em.getTransaction().commit();
这是我的测试类的完整代码
@RunWith(Arquillian.class)
public class HibernateTestSample {
@Deployment
public static WebArchive createTestArchive()
{
MavenDependencyResolver resolver = DependencyResolvers.use(
MavenDependencyResolver.class).loadMetadataFromPom("pom.xml");
WebArchive webArchive= ShrinkWrap
.create(WebArchive.class, "ROOT.war")
.addClasses(CdiTestBean.class,HibernateListener.class,PersistenceListener.class)
.addAsLibraries(
resolver.artifact("org.jboss.weld.servlet:weld-servlet")
// .artifact("org.hibernate.javax.persistence:hibernate-jpa-2.0-api")
.artifact("org.apache.tomcat:tomcat-dbcp")
.artifact("org.hibernate:hibernate-entitymanager")
.artifact("org.hibernate:hibernate-validator")
.artifact("org.hibernate:hibernate-core")
.artifact("com.h2database:h2")
.artifact("mysql:mysql-connector-java")
.resolveAs(GenericArchive.class))
.addAsWebInfResource(EmptyAsset.INSTANCE, "beans.xml")
.addAsWebInfResource("test-persistence.xml", "classes/META-INF/persistence.xml")
.addAsWebInfResource("hibernate.cfg.xml", "classes/hibernate.cfg.xml")
// .addAsWebInfResource("context.xml", "classes/META-INF/context.xml")
.addAsManifestResource("context.xml", "context.xml")
.setWebXML("hibernate-web.xml");
System.out.println(webArchive.toString(true));
return webArchive;
}
@Test
public void myTest()
throws Exception {
EntityManager em = PersistenceListener.createEntityManager();
em.getTransaction().begin();
em.createQuery("delete from Game").executeUpdate();
em.getTransaction().commit();
...............
.......
...
}
}
但我想将我的 entityManager 注入我的班级。我在另一篇文章中读到 我不能在课堂上使用@PersistenceContext，因此我决定使用生产者来注入我的实体管理器。但这对我不起作用，请告诉我我在这里做错了什么（我是 CDI 的新手）
这是我的新 ServletContextListener
public class PersistenceListener implements ServletContextListener {
private static EntityManagerFactory entityManagerFactory;
@Produces
private EntityManager entityManager;
public void contextInitialized(ServletContextEvent sce){
ServletContext context = sce.getServletContext();
entityManagerFactory = Persistence.createEntityManagerFactory("hibernate-test");
createEntityManager();
}
public void contextDestroyed(ServletContextEvent sce) {
entityManagerFactory.close();
}
public void createEntityManager() {
if (entityManagerFactory == null) {
throw new IllegalStateException("Context is not initialized yet.");
}
this.entityManager = entityManagerFactory.createEntityManager();
}
我正在注入我的测试类
@Inject
private EntityManager em;
它是空的