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javax.persistence.TransactionRequiredException
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created by <a href="http://community.jboss.org/people/MSchmidke">Marcus Schmidke</a> in <i>JBoss AS7 Development</i> - <a href="http://community.jboss.org/message/631054#631054">View the full discussion</a>
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<div class="jive-rendered-content"><p>Hello all,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>after years of developing with Seam 2.x, I now try to jump start into a new world (AS7, builtin CDI etc.), but until now, I am not very succesful.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I've written a very simple sample application, a few entities and one servlet. After lots of work, everything deploys fine, Hibernate generates tables, well.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Then I call the servlet from Webbrowser. The servlet does nothing else than injecting and calling a SLSB, which itself tries to create and persist an entity.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>With Seam 2.x, I never worried about transactions - everything was fully automatic. In fact, I have absolutely no knowledge about EJB3 CMT, because Seam did everything for me.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>But now the only thing I get this this weird TransactionRequiredException. Google does not know anything about it (sureley because it is an absolute beginner's error).</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>My servlet:</p><p>@WebServlet(urlPatterns = "/*")</p><p>public class VaadinAppServlet extends HttpServlet {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    @Inject</p><p>    Beispieldaten bd;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    @Override</p><p>    protected void service(HttpServletRequest arg0, HttpServletResponse arg1)</p><p>            throws ServletException, IOException {</p><p>        bd.run();</p><p>        super.service(arg0, arg1);</p><p>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>}</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The SLSB:</p><p>@Stateless</p><p>@TransactionManagement(TransactionManagementType.CONTAINER)</p><p>@TransactionAttribute(TransactionAttributeType.REQUIRED)</p><p>public class BeispieldatenImpl implements Beispieldaten {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    @PersistenceContext</p><p>    private EntityManager session;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    public void run() {</p><p>       TestEntity te=new TestEntity();</p><p>       session.persist(te);</p><p>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>}</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>(as you can see, I added lots of useless annotations just to avoid any possible mistake)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>And the interface:</p><p>@Local</p><p>public interface Beispieldaten {</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    void run();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>}</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>persistence.xml:</p><p><?xml version="1.0" encoding="UTF-8"?></p><p><persistence version="2.0"</p><p><span>    xmlns="</span><a class="jive-link-external-small" href="http://java.sun.com/xml/ns/persistence" target="_blank">http://java.sun.com/xml/ns/persistence</a><span>" xmlns:xsi="</span><a class="jive-link-external-small" href="http://www.w3.org/2001/XMLSchema-instance" target="_blank">http://www.w3.org/2001/XMLSchema-instance</a><span>"</span></p><p><span>    xsi:schemaLocation="</span><a class="jive-link-external-small" href="http://java.sun.com/xml/ns/persistence" target="_blank">http://java.sun.com/xml/ns/persistence</a><span> </span><a class="jive-link-external-small" href="http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd" target="_blank">http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd</a><span>"></span></p><p>    <persistence-unit name="KochbuchServer"</p><p>        transaction-type="JTA"></p><p>        <jta-data-source>java:jboss/datasources/KochbuchDS</jta-data-source></p><p>        <exclude-unlisted-classes>false</exclude-unlisted-classes></p><p>        <properties></p><p>            <property name="hibernate.show_sql" value="true" /></p><p>            <property name="hibernate.default_batch_fetch_size" value="100" /></p><p>            <property name="hibernate.hbm2ddl.auto" value="create" /></p><p>            <property name="jboss.entity.manager.factory.jndi.name"</p><p>                value="java:/EntityManagerFactories/KochbuchServer" /></p><p>        </properties></p><p>    </persistence-unit></p><p></persistence></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>All packaged in an EAR - servlet in WAR, other classes in EJB-module.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'm sure my mistake is quite obvious, but I need help ...</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thank you!</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Marcus.</p></div>
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