Question

我使用apache karaf作为OSGI容器，Aries Blueprint用于声明bean和Hibernate 4.3.6作为JPA提供程序。数据库是MySQL。我需要在抛出异常时回滚事务。我将用以下代码片段来说明它：

  @Transactional(Transactional.TxType.REQUIRED)
  public void testTransactionMethod() {
    Role role = createRole();
    roleDao.save(role);

    User user = new User();
    userDao.save(user);
  }

两个DAO的dao.save（）方法的实现是：

public T save(T entity) {
    return entityManager.merge(entity);
}

DAO的save()方法未使用@Transactional进行注释。我的persistence.xml如下：

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             version="2.0">
  <persistence-unit name="examplePersistenceUnit" transaction-type="JTA">
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
    <jta-data-source>osgi:service/javax.sql.DataSource/(osgi.jndi.service.name=jdbc/sqlds)</jta-data-source>
    <properties>
      <property name="hibernate.connection.url" value="jdbcURL"/>
      <property name="hibernate.connection.username" value="username"/>
      <property name="hibernate.connection.password" value="password"/>
      <property name="hibernate.connection.driver_class" value="DriverClass"/>

      <property name="hibernate.dialect" value="DB_Dialect"/>
      <property name="hibernate.show_sql" value="false"/>
      <property name="hibernate.hbm2ddl.auto" value="none"/>
    </properties>
  </persistence-unit>
</persistence>

我期望的是当userDao.save(user)抛出异常时，整个事务将被回滚并且没有在我的ROLE表中保存任何内容，但实际上我的数据库中有一个新的Role条目。我也尝试使用@Transactional(rollbackOn = Exception.class)，但仍然得到相同的结果。

修改

根据要求，我添加了我的dataSource cofiguration。我使用pax-jdbc。我有两个cfg文件。第一个是org.apache.aries.jpa.examplePersistenceUnit.cfg

hibernate.connection.url = jdbc:mysql://url/schema
hibernate.connection.username = username
hibernate.connection.password = password
hibernate.connection.driver_class = com.mysql.jdbc.Driver
hibernate.dialect = org.hibernate.dialect.MySQLDialect
hibernate.show_sql = true
hibernate.hbm2ddl.auto = none

第二个是org.ops4j.datasource-example.cfg

osgi.jdbc.driver.name = mysql
    databaseName = ${user.name}
    dataSourceName = jdbc/sqlds
    url=jdbc:mysql://url/schema
    user=${user.name}
    password=${user.name}

同样在我的蓝图中，我有以下内容：

<?xml version="1.0" encoding="UTF-8"?>
<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jpa="http://aries.apache.org/xmlns/jpa/v2.0.0"
    xmlns:tx="http://aries.apache.org/xmlns/transactions/v2.0.0"
    xsi:schemaLocation="http://www.osgi.org/xmlns/blueprint/v1.0.0 https://osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd">
    <jpa:enable />
    <tx:enable />

事务回滚在karaf中不起作用

0 个答案: