在Java中实现阻塞函数调用 [英] Implement a blocking function call in Java
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问题描述
在Java中实现阻塞函数调用的建议/最佳方法是什么,稍后可以通过另一个线程的调用解除阻塞?
What is the recommended / best way to implement a blocking function call in Java, that can be later unblocked by a call from another thread?
基本上我想对一个对象有两个方法,其中第一个调用阻塞任何调用线程,直到第二个方法由另一个线程运行:
Basically I want to have two methods on an object, where the first call blocks any calling thread until the second method is run by another thread:
public class Blocker {
/* Any thread that calls this function will get blocked */
public static SomeResultObject blockingCall() {
// ...
}
/* when this function is called all blocked threads will continue */
public void unblockAll() {
// ...
}
}
意图BTW不仅仅是为了获得阻塞行为,
The intention BTW is not just to get blocking behaviour, but to write a method that blocks until some future point when it is possible to compute the required result.
推荐答案
您可以使用 CountDownLatch 。
latch = new CountDownLatch(1);
要阻止,请调用:
latch.await();
要解除封锁,请致电:
latch.countDown();
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