Spring MVC控制器事务性 [英] Spring MVC Controller Transactional

问题描述

我正在尝试获取一个用@Transactional注释的Spring MVC Controller方法，以在该方法返回之前如果拉回客户端的网络电缆将其回滚，我似乎无法使其正常运行，在这里是我要实现的目标的一个例子.

I'm trying to get a Spring MVC Controller method which has been annotated with @Transactional to rollback if the network cable in pulled on the client before the method returns, I just can't seem to get it to work, here is an example of what I'm trying to achieve.

@Transactional(rollbackFor = IOException.class)
@RequestMapping(value = "/test")
public @ResponseBody
Integer testMethod(HttpServletResponse response) throws Exception {
    LOG.debug("Put breakpoint here, and pull network cable on client...");
    //IMHO this should throw an IOException, but it isn't doing?
    response.getOutputStream();

    return 10;
}

因此，如果我在日志记录语句上放置一个断点，然后拔下客户端上的网络电缆然后播放，则可能会从response.getOutputStream()获得IOException，但事实并非如此，任何帮助都会非常感谢?

So if I put a breakpoint on the logging statement, then unplug the network cable on the client then play, I would of expected to get an IOException from response.getOutputStream(), but this is not the case, any help will be much appreciated?

推荐答案

不要使控制器具有事务性.事务用于服务层.常见的做法是拥有一个基本控制器，其他控制器进行扩展并包含错误处理-在这种情况下，可以返回不同的异常消息.

Don't make the controller transactional. Transactions are for the service layer. A common practice is to have a base controller, that other controllers extend and contains error handling - in which case different exception messages can be returned.

您要拔出客户端上的网络电缆，并期待服务器上出现异常吗?这没有道理.

You are unplugging a network cable on the client, and expecting an exception on the server ? This doesn't make sense.

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