如何使用ScheduledExecutorService重新安排任务？ [英] How to reschedule a task using a ScheduledExecutorService?

问题描述

我在java文档中看到了这一点： ScheduledAtFixedRate ，它说

I saw this in the java docs: ScheduledAtFixedRate, it says

如果执行任务
遇到异常，则后续
执行被禁止

If any execution of the task encounters an exception, subsequent executions are suppressed

我不希望在我的应用程序中发生这种情况。即使我看到异常，我也总是希望后续执行发生并继续。如何从 ScheduledExecutorService 获得此行为。

I don't want this to happen in my application. Even if I see an exception I would always want the subsequent executions to occur and continue. How can I get this behavior from ScheduledExecutorService.

推荐答案

围绕Callable .call方法或带有try / catch的Runnable.run方法......

Surround the Callable.call method or the Runnable.run method with a try/catch...

例如：

public void run()
{
    try
    {
        // ... code
    }
    catch(final IOException ex)
    {
        // handle it
    }
    catch(final RuntimeException ex)
    {
        // handle it
    }
    catch(final Exception ex)
    {
        // handle it
    }
    catch(final Error ex)
    {
        // handle it
    }
    catch(final Throwable ex)
    {
        // handle it
    }
}

注意除了编译器告诉你的东西之外的其他东西（我的样本中的IOException）不是一个好主意，但有时候，这听起来像其中之一，它可以工作如果你正确处理它，请输出。

Note that catching anything other than what the compiler tells you too (the IOException in my sample) isn't a good idea, but there are some times, and this sounds like one of them, that it can work out if you handle it properly.

请记住像错误这样的东西非常糟糕 - 虚拟机内存不足等等......所以要小心你如何处理它们（这就是为什么我将它们分成自己的处理程序而不仅仅是捕获（最终的Throwable ex）而不是其他任何东西）。

Remember that things like Error are very bad - the VM ran out of memory etc... so be careful how you handle them (which is why I separated them out into their own handlers rather than just doing catch(final Throwable ex) and nothing else).

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