对 Java 事件循环库的建议
我正在寻找类似 JavaScript setTimeout 的东西，但带有 Runnable，具有以下限制：
- 每个超时不需要单独的专用线程。
- 已经开发并经过深思熟虑。
- 甚至可能包括附加功能。 （取消超时？，等待什么？，异步 I/O？）
- 不需要任何 GUI 库。 （Java FX/Swing/AWT 都内置了事件循环）
您有什么建议吗？
编辑：我已经找到了我要找的东西。如果有一个库还包含与非阻塞或异步 I/O 相关的内容，那就更好了。
I am looking for something like the JavaScript setTimeout, but with a Runnable, with the following restrictions:
- Does not require individual dedicated threads per timeout.
- Already developed and thought through.
- Maybe even including additional features. (cancel timeout?, wait for something?, async I/O?)
- Does not require any GUI libraries. (Java FX/Swing/AWT all have event loops built in)
Do you have any suggestions?
Edit: I have found what I am looking for. A plus would be if there was a library that also included something related to either non-blocking or asynchronous I/O.
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您可能正在寻找 ScheduledThreadPoolExecutor ：
我不太明白计划的可运行对象和事件循环之间的联系，但也许你会发现什么你正在寻找这个班级。
You're probably looking for ScheduledThreadPoolExecutor :
I don't really understand the link between scheduled runnables and an event loop, but maybe you'll find what you're looking with this class.
您可以使用 java.util.Timer
http://docs .oracle.com/javase/6/docs/api/java/util/Timer.html
http://docs.oracle.com/javase/6/docs/api/java/util/TimerTask.html
您可以设置任务仅运行一次或定期运行。
您还可以停止/取消单个 TimerTask 或所有任务。
You can use java.util.Timer
http://docs.oracle.com/javase/6/docs/api/java/util/Timer.html
http://docs.oracle.com/javase/6/docs/api/java/util/TimerTask.html
You can set the task run only once or periodically.
You can also stop/cancel individual TimerTask or all tasks.
如果您正在寻找 Java 中的简单 Node.js 样式事件循环，ThreadPoolExecutor 是一个好的开始。
查看执行器 ThreadPoolExecutor，特别是 Executors.newSingleThreadExecutor()。这为您提供了一个后台线程（如 Node 事件循环：请参阅 这个问题）您可以向其提交任务。
对于异步 IO，处理阻塞活动的任务需要拆分线程（或执行器）并使用 Future 将结果提交回事件循环。
If you're looking for a simple node.js style event loop in Java, ThreadPoolExecutor is a good start.
Take a look at the Executors factory mentioned in the javadoc for ThreadPoolExecutor, particularly Executors.newSingleThreadExecutor(). This gives you a single background thread (like the Node event loop: see the answer to this question) to which you can submit tasks.
For async IO, tasks handling blocking activity need to split of a Thread (or Executor) and use a Future to submit the result back to the event loop.
我认为 Vert.x 正是您所需要的，它是事件驱动且非阻塞的。
I think Vert.x is what you need, it is event driven and non blocking.
您是否考虑过使用ThreadPoolExecutor
可能对你有用。
Have you thought of using awaitTermination API of ThreadPoolExecutor
might be useful to you.