我并不习惯JPA ......所以这更像是一个基本问题
我使用JPA2 - (不是休眠)
我有这个功能,我想对我的
进行更新@RequestScoped // (this is javax.faces.bean.RequestScoped)
@Stafeful // (this is javax.ejb.Stateful)
public class MyProvider {
@Inject
private EntityManager entityManager;
/* some variables and getters and setters */
public void setLocked(Long id, boolean locked) {
entityManager.getTransaction().begin();
user = userProvider.findUserByID(id);
user.setLocked(locked);
entityManager.persist(user);
// i also tried it with refresh instead of persist
entityManager.refresh(user);
entityManager.getTransaction().commit();
}
}
但此时我收到此错误 entityManager.getTransaction()开头();
java.lang.IllegalStateException: A JTA EntityManager cannot use getTransaction()
org.hibernate.ejb.AbstractEntityManagerImpl.getTransaction(AbstractEntityManagerImpl.java:996)
org.jboss.as.jpa.container.AbstractEntityManager.getTransaction(AbstractEntityManager.java:498)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:601)
org.jboss.weld.util.reflection.SecureReflections$13.work(SecureReflections.java:264)
org.jboss.weld.util.reflection.SecureReflectionAccess.run(SecureReflectionAccess.java:52)
org.jboss.weld.util.reflection.SecureReflectionAccess.runAsInvocation(SecureReflectionAccess.java:137)
org.jboss.weld.util.reflection.SecureReflections.invoke(SecureReflections.java:260)
org.jboss.weld.bean.builtin.CallableMethodHandler.invoke(CallableMethodHandler.java:51)
org.jboss.weld.bean.proxy.EnterpriseTargetBeanInstance.invoke(EnterpriseTargetBeanInstance.java:56)
org.jboss.weld.bean.proxy.ProxyMethodHandler.invoke(ProxyMethodHandler.java:105)
org.jboss.weldx.persistence.EntityManager$-1570536921$Proxy$_$$_Weld$Proxy$.getTransaction(EntityManager$-1570536921$Proxy$_$$_Weld$Proxy$.java)
de.demoapp.controller.UserController.setLocked(UserController.java:452)
de.demoapp.controller.UserController.lock(UserController.java:721)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:601)
org.apache.el.parser.AstValue.invoke(AstValue.java:262)
org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278)
org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:39)
org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
javax.faces.component.UICommand.broadcast(UICommand.java:315)
javax.faces.component.UIData.broadcast(UIData.java:1093)
javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794)
javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259)
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:62)
我还阅读了this文章 - 但它并没有真正帮助,它仍然会引发:javax.persistence.TransactionRequiredException: no transaction is in progress
我不确定我是否做了一些必要的错误...
答案 0 :(得分:3)
是的,有一些必要的错误。容器管理的事务和用户管理的事务之间不匹配。 EntityManager.getTransaction的文档非常清楚地说明了问题所在:
<强>抛出:强>
IllegalStateException - 如果在JTA实体管理器上调用
问题来自代码中的 entityManager.getTransaction(),使用/ flush / persist / etc进行黑客攻击并不重要,因为在执行这些行之前会发生异常。
有关该主题的更多详细信息,请参阅:http://en.wikibooks.org/wiki/Java_Persistence/Transactions
答案 1 :(得分:1)
我导入:
import javax.ejb.TransactionAttribute;
import static javax.ejb.TransactionAttributeType.REQUIRED; // this one is important!!!
我的注释现在是:
@RequestScoped
@Stateful
@TransactionAttribute(value=REQUIRED)
public class UserProvider {
public void setLocked(Long id, boolean locked) {
User user = new User();
user = findUserByID(id);
user.setLocked(locked);
entityManager.merge(user);
}
}
现在它可以工作,但原因是第二次导入和anotation!