如何建立与Hibernate

的UserTransaction我有一个MySQL数据库，用于管理用户信息，而且我在使用JTA数据源为我的MySQL数据库，这里是persistence.xml中的样子：如何建立与Hibernate

<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_2_0.xsd" 
      version="2.0"> 
    <persistence-unit name="SensorCloudPU" transaction-type="JTA"> 
     <jta-data-source>java:/SensorCloudPU</jta-data-source> 
<!--  <non-jta-data-source>java:/SensorCloudPU</non-jta-data-source> --> 
     <class>com.sensorhound.common.domain.impl.AnomalousInfo</class> 
     <class>com.sensorhound.common.domain.impl.Code</class> 
     <class>com.sensorhound.common.domain.impl.Device</class> 
     <class>com.sensorhound.common.domain.impl.Executable</class> 
     <class>com.sensorhound.common.domain.impl.Group</class> 
     <class>com.sensorhound.common.domain.impl.GroupAlert</class> 
     <class>com.sensorhound.common.domain.impl.GroupRule</class> 
     <class>com.sensorhound.common.domain.impl.GroupRuleDefinition</class> 
     <class>com.sensorhound.common.domain.impl.GroupRuleStatus</class> 
     <class>com.sensorhound.common.domain.impl.Node</class> 
     <class>com.sensorhound.common.domain.impl.NodeAlert</class> 
     <class>com.sensorhound.common.domain.impl.NodeRule</class> 
     <class>com.sensorhound.common.domain.impl.NodeRuleDefinition</class> 
     <class>com.sensorhound.common.domain.impl.Organization</class> 
     <class>com.sensorhound.common.domain.impl.PastGroupStatus</class> 
     <class>com.sensorhound.common.domain.impl.Trace</class> 
     <class>com.sensorhound.common.domain.impl.TrainingSession</class> 
     <class>com.sensorhound.common.domain.impl.User</class> 
     <class>com.sensorhound.common.domain.impl.Role</class> 
     <exclude-unlisted-classes>true</exclude-unlisted-classes> 
     <properties> 
     <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/> 
     <property name="hibernate.hbm2ddl.auto" value="update"/> 
     <property name="hibernate.show_sql" value = "false" /> 
     <property name="hibernate.connection.autocommit" value="true" /> 
     <property name="hibernate.event.merge.entity_copy_observer" value="allow"/> 
     <property name="transaction.factory_class" value="org.hibernate.transaction.JTATransactionFactory"/> 
     <property name="jta.UserTransaction" value="java:jboss/UserTransaction"/> 
     </properties> 
    </persistence-unit> 
</persistence>

我有一个这样的端点：

@Path("/delete") 
    @POST 
    @Consumes(MediaType.APPLICATION_FORM_URLENCODED) 
    @Produces(MediaType.APPLICATION_JSON) 
    public Response deleteUser(@FormParam("organization_id") Integer organizationId, 
     @FormParam("username") String username) throws JsonProcessingException, NotSupportedException, 
     SystemException, SecurityException, IllegalStateException, RollbackException, 
     HeuristicMixedException, HeuristicRollbackException, NamingException { 
    Organization org = organizationDAO.getByOrganizationId(organizationId); 
    userDao.deleteUserByUserNameAndOrganization(username, org); 
    return Response.status(Response.Status.OK).build(); 
    }

与道是这样的：

public class userDAO { 
    @PersistenceContext(unitName = "SensorCloudPU") 
    protected EntityManager em; 

    @Resource 
    protected UserTransaction utx; 

    public void deleteUserByUserNameAndOrganization(String userName, Organization org) 
      throws NotSupportedException, SystemException, SecurityException, IllegalStateException, 
      RollbackException, HeuristicMixedException, HeuristicRollbackException { 
     Query q = this.em.createNamedQuery(User.Q_GET_BY_USERNAME_AND_ORGANIZATION); 
     q.setParameter("organization", org); 
     q.setParameter("user_name", userName); 
     User u = this.executeQueryForSingleResult(q); 
     if (u == null) { 
      return; 
     } 
     utx.begin(); 
     this.em.remove(u); 
     utx.commit(); 
     } 
}

但每一次，当我加载页面，并尝试从数据库中删除，我得到这个错误：

资源查找注射失败：JAVA：JBoss的/ UserTransaction的]

的UserTransaction [根异常是java.lang.IllegalStateException ：WFLYEJB0137：只有会话和消息驱动bean与bean管理事务划分允许访问的UserTransaction]

来源

2017-07-31 LebroNan

由于您主要关注事务管理，所以我建议您将DAO转换为EJB。只需要一条线：

@Stateless 
public class userDAO { 

    @PersistenceContext(unitName = "SensorCloudPU") 
    protected EntityManager em; 

    public void deleteUserByUserNameAndOrganization(String userName, Organization org) { 
     Query q = this.em.createNamedQuery(User.Q_GET_BY_USERNAME_AND_ORGANIZATION); 
     q.setParameter("organization", org); 
     q.setParameter("user_name", userName); 
     User u = this.executeQueryForSingleResult(q); 
     if (u != null) { 
      this.em.remove(u); 
     } 
    } 
}

，你可以看到它显著简化了操作。 EJB可以免费为您提供JTA事务划分（如果需要，可以回滚）。

即使您正在构建仅限WAR的部署，这也可以工作。

如果需要，还可以将@Stateless添加到JAX-RS端点。至少你会得到更多的监控，而不是你可能拥有的。

来源

2017-08-01 13:14:28

您不能在EJB使用的UserTransaction，除非添加@TransactionManagement（豆）

什么TransactionManagement中确实是

指定会话Bean或消息驱动Bean是否具有容器管理事务或Bean管理事务。如果未使用此注释，则认为bean具有容器管理的事务管理。

@TransactionManagement(BEAN) 
public class userDAO {

来源

2017-08-01 11:02:26 Ashish451

如何建立与Hibernate

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