春季交易：接口v类

Question

我想使用弹簧交易，并失败。当我设置它们使我的web应用程序将在Tomcat下推出，呼吁

TransactionAspectSupport.currentTransactionStatus().setRollbackOnly(); 

当我需要回滚事务，但先前的DB更改不会回滚，我得到了下面的错误我localhost.date.log文件：

SEVERE: Servlet.service() for servlet model threw exception 
org.springframework.transaction.NoTransactionException: No transaction aspect-managed TransactionStatus in scope 
    at org.springframework.transaction.interceptor.TransactionAspectSupport.currentTransactionStatus(TransactionAspectSupport.java:122) 
    at edu.mayo.bsi.backslapper.model.dao.impl.TransactServiceDAOImpl.giveProps(TransactServiceDAOImpl.java:160) 

我

public interface TransactServiceDAO 

和

public class TransactServiceDAOImpl implements TransactServiceDAO 

在我的应用上下文-config.xml中

我

<bean id = "transactService" class = "edu.mayo.bsi.backslapper.model.dao.impl.TransactServiceDAOImpl"/> 

<!-- enable the configuration of transactional behavior based on annotations --> 
<!-- the transactional advice (what 'happens'; see the <aop:advisor/> bean below) --> 
<tx:advice id = "txAdvice" transaction-manager = "txManager"> 
    <!-- the transactional semantics... --> 
    <tx:attributes> 
     <!-- all methods starting with 'get' are read-only --> 
     <tx:method name = "get*" read-only = "true"/> 
     <!-- other methods use the default transaction settings (see below) --> 
     <tx:method name = "*"/> 
    </tx:attributes> 
</tx:advice> 

<!-- ensure that the above transactional advice runs for any execution of an operation defined by the TransactServiceDAO interface --> 
<aop:config> 
    <aop:pointcut id = "transactServiceOperation" expression = "execution(* edu.mayo.bsi.backslapper.model.dao.TransactServiceDAO.*(..))"/> 
    <aop:advisor advice-ref = "txAdvice" pointcut-ref = "transactServiceOperation"/> 
</aop:config> 

<bean id = "txManager" class = "org.springframework.jdbc.datasource.DataSourceTransactionManager"> 
    <property name = "dataSource" ref = "backDataSource"/> 
</bean> 

<tx:advice id = "txAdvice" transaction-manager = "txManager"> 
    <tx:attributes> 
     <tx:method name = "*" rollback-for = "Throwable"/> 
     <tx:method name = "*" rollback-for = "java.sql.SQLException"/> 
    </tx:attributes> 
</tx:advice> 

下面是一个例子，一个例程，其中一个（计数== 0）回滚不会取消“删除老用户”。

我在做什么错？

public String setUsers (DataSource dataSource, User theUser, String store, AdminUser[] newUsers) 
{ 
    NamedParameterJdbcTemplate namedParameterJdbcTemplate = new NamedParameterJdbcTemplate (dataSource); 
    Map<String, Object>   params = new HashMap<String, Object>(); 

    params.put ("lanID", theUser.getLanID()); 
    params.put ("storeName", store); 

    int count = namedParameterJdbcTemplate.update (kDeleteOldUsers, params); 

    for (AdminUser curUser : newUsers) 
    { 
     int userID = updateUser (namedParameterJdbcTemplate, curUser.getLanID(), curUser.getFullName(), curUser.getEmail(), null); 

     if (userID == kError) 
      userID = addUser (namedParameterJdbcTemplate, curUser); 

     params.put ("userID", Integer.valueOf (userID)); 
     count = namedParameterJdbcTemplate.update (kAddStoreUser, params); 
     if (count == 0) // Wasn't inserted 
      TransactionAspectSupport.currentTransactionStatus().setRollbackOnly(); 

     params.put ("backslapsToGive", Integer.valueOf (curUser.getBackslapsToGive())); 
     params.put ("monthlyBackslaps", Integer.valueOf (curUser.getMaxBackslaps())); 
     count = namedParameterJdbcTemplate.update (kUpdateUserStores, params); 
     if (count == 0) // Wasn't updated 
      TransactionAspectSupport.currentTransactionStatus().setRollbackOnly(); 
    } 

    return null; 
} 

Answer 1

我从来没有使用过 TransactionAspectSupport.currentTransactionStatus（）.setRollbackOnly（）; 为此目的。 我想你应该在这里抛出异常。最好的方法是扩展RuntimeException。春季交易是一种始终如一的方法。如果引发异常事务被回滚。

如果你不想让这个异常中断你的流程，你可以把它放在这个方法中，并捕获调用方法。