Ejb 2.1 定时器 IOException
我有一个奇怪的问题，我正在使用 EJB 2.1 计时器对象在一天中的特定时间触发计时器并执行一些内务工作，例如删除文件。计时器按预期触发，但问题是它不会停止。以下是我用来启动计时器的代码：
Timer myTimer = timerService.createTimer(timeOfDay, myInterval, null);
在我的 ejbTimeout 方法中，我有一个删除文件的代码，现在如果我在此方法中收到 IOException，则 EJB 将回滚；并再次调用该方法。计时器会触发 10-15 次然后停止。我正在使用 WAS 6.1，并且之前因 WAS 不遵守 EJB 规范而有过一些不好的经历。还有人有其他解释或理由吗？任何帮助将不胜感激！
I have a weird problem, I am using EJB 2.1 timer object to fire a timer at a specific time in a day and do some housekeeping stuff like deleting files. The timer fires as expected but the problem is that it does not stop. Following is the code I used to initiate the timer:
Timer myTimer = timerService.createTimer(timeOfDay, myInterval, null);
In my ejbTimeout method I have a code which deletes files, now if I get a IOException in this method then the EJB is rolled back; and the method is called again. The timer fires 10-15 times before stopping. I am using WAS 6.1 and I had some bad experiences with WAS not adhering to EJB specks before. Does anybody have any other explanation or justification ? any help would be appreciated !
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不要在 TimeOut 方法中编写逻辑，而是使用线程来删除文件。因此，即使线程中发生异常，您的事务也可能不会回滚。
否则，您可以使用 Bean Managed Transaction 来控制事务，可以相应地回滚 - 提交。
Instead of writing logic inside TimeOut method, use threads to delete the files. So even if exception occurs in thread, your transaction may not get rolled back.
Else you can use Bean Managed Transaction to have control over transactions, can rollback - commit accordingly.