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POCan't get OpenEntityManagerInViewFilter to work in JBoss 6.1
 

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  1. POCan't get OpenEntityManagerInViewFilter to work in JBoss 6.1
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    <p>I am trying to add open-session-in-view behavior to an existing pure JPA application. Using Spring in the service-tier is not an option. I would like to wrap the view in Spring's OpenEntityManagerInViewFilter, and not have to modify the EJB layer.</p> <p>I am not having any luck getting OpenEntityManagerInViewFilter (Spring 3.2.2) to work in JBoss 6.1. The filter is definitely being invoked, but I am still getting a LazyInitializationException in the view.</p> <p>The filter and the session-bean are using a different instance (and class) of the EntityManager. The filter is getting a <code>org.hibernate.ejb.EntityManagerImpl</code>, while the session-bean is getting a <code>org.jboss.jpa.tx.TransactionScopedEntityManager</code>. I am not sure what Spring configuration is responsible for this.</p> <p>Here is the relevant code/config:</p> <p><em><strong>war/WEB-INF/classes/test.web.servlet.TestServlet</em></strong></p> <pre><code>public class TestServlet extends HttpServlet { private static final long serialVersionUID = 1L; @EJB private ServiceLocal service; @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { long parentId = Long.parseLong(req.getParameter("parentId")); Parent parent = service.retrieveParent(parentId); // this call throws a LazyInitializationException // because parent.children.session is NULL parent.getChildren().iterator().next().getName(); req.setAttribute("parent", parent); RequestDispatcher requestDispatcher = this.getServletContext().getRequestDispatcher("/WEB-INF/jsp/view.jsp"); requestDispatcher.forward(req, resp); } } </code></pre> <p><em><strong>ejb/test.ejb.session.ServiceBean</em></strong></p> <pre><code>@Stateless @TransactionAttribute(TransactionAttributeType.REQUIRED) public class ServiceBean implements ServiceLocal, Service { @PersistenceContext(name="test") private EntityManager entityManager; @Override public Parent retrieveParent(Long parentId) { return entityManager.find(Parent.class, parentId); } } </code></pre> <p><em><strong>war/WEB-INF/web.xml</em></strong></p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"&gt; &lt;display-name&gt;test-war&lt;/display-name&gt; &lt;context-param&gt; &lt;param-name&gt;contextConfigLocation&lt;/param-name&gt; &lt;param-value&gt;/WEB-INF/spring.xml&lt;/param-value&gt; &lt;/context-param&gt; &lt;filter&gt; &lt;filter-name&gt;osiv-filter&lt;/filter-name&gt; &lt;filter-class&gt;org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter&lt;/filter-class&gt; &lt;init-param&gt; &lt;param-name&gt;flushMode&lt;/param-name&gt; &lt;param-value&gt;AUTO&lt;/param-value&gt; &lt;/init-param&gt; &lt;/filter&gt; &lt;servlet&gt; &lt;servlet-name&gt;test-servlet&lt;/servlet-name&gt; &lt;servlet-class&gt;test.web.servlet.TestServlet&lt;/servlet-class&gt; &lt;/servlet&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;test-servlet&lt;/servlet-name&gt; &lt;url-pattern&gt;*.do&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; &lt;filter-mapping&gt; &lt;filter-name&gt;osiv-filter&lt;/filter-name&gt; &lt;servlet-name&gt;test-servlet&lt;/servlet-name&gt; &lt;/filter-mapping&gt; &lt;listener&gt; &lt;listener-class&gt;org.springframework.web.context.ContextLoaderListener&lt;/listener-class&gt; &lt;/listener&gt; &lt;listener&gt; &lt;listener-class&gt;org.springframework.web.context.request.RequestContextListener&lt;/listener-class&gt; &lt;/listener&gt; &lt;/web-app&gt; </code></pre> <p><em><strong>war/WEB-INF/spring.xml</em></strong></p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd"&gt; &lt;beans&gt; &lt;bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"&gt; &lt;property name="jpaVendorAdapter"&gt; &lt;bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" /&gt; &lt;/property&gt; &lt;property name="persistenceUnitName" value="test" /&gt; &lt;property name="jpaProperties"&gt; &lt;props&gt; &lt;prop key="hibernate.transaction.manager_lookup_class"&gt; org.hibernate.transaction.JBossTransactionManagerLookup &lt;/prop&gt; &lt;/props&gt; &lt;/property&gt; &lt;/bean&gt; &lt;/beans&gt; </code></pre> <p><em><strong>ejb/META-INF/persistence.xml</em></strong></p> <pre><code>&lt;persistence 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_1_0.xsd" version="1.0"&gt; &lt;persistence-unit name="test" transaction-type="JTA"&gt; &lt;provider&gt;org.hibernate.ejb.HibernatePersistence&lt;/provider&gt; &lt;jta-data-source&gt;java:/MSSQLDS&lt;/jta-data-source&gt; &lt;properties&gt; &lt;property name="hibernate.dialect" value="org.hibernate.dialect.SQLServerDialect"/&gt; &lt;property name="hibernate.show_sql" value="false" /&gt; &lt;property name="hibernate.format_sql" value="true" /&gt; &lt;property name="hibernate.use_sql_comments" value="true" /&gt; &lt;property name="jboss.entity.manager.factory.jndi.name" value="java:/testEntityManagerFactory" /&gt; &lt;property name="jboss.entity.manager.jndi.name" value="java:/testEntityManager" /&gt; &lt;/properties&gt; &lt;/persistence-unit&gt; &lt;/persistence&gt; </code></pre>
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