Ruby 1.8 线程在 Phusion Passenger 中的行为如何？

发布于 2024-12-12 00:10:41 字数 181 浏览 0 评论 0原文

如果我在控制器操作中触发其中 1 个或 1000 个：

Thread.new {
  # do some stuff
}

它们确实会与 http 请求异步运行吗？
如果引发异常，它会流到哪里？
还有什么我应该知道的吗？

原文

If I fire of 1 or 1000 of these in a controller action:

Thread.new {
  # do some stuff
}

Will they indeed run asynchronously with the http request?
If an exception is raised, where does it trickle up to?
Anything else I should know about?

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回眸一笑 2024-12-19 00:10:41

线程和异常不一定是朋友，因为异常无法脱离当前线程并警告父线程。您还需要打开线程异常通知，否则您根本不会听到它们：

Thread.new do
  Thread.abort_on_exception = true
end

您还需要在每个新线程上调用 Thread.join ，否则主线程将在没有它们的情况下匆忙运行。

这样，您的代码至少会在出现异常时停止，而不是简单地终止生成异常的线程并继续运行，就好像什么也没发生一样。

确保您在线程内调用的内容是线程安全的，否则您可能会得到意外的结果。

Threads and exceptions are not necessarily friends since exceptions can't bust out of the current thread and alert the parent thread. You also need to turn on thread exception notification or you'll never hear about them at all:

Thread.new do
  Thread.abort_on_exception = true
end

You'll also need to call Thread.join on each new thread or the main one will hurry along without them.

This way your code will at least halt on an exception instead of simply terminating the thread that generated one and continuing on as if nothing had happened.

Make sure that the things you're calling inside your thread are thread safe or you may get unexpected results.

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