目录一.什么是Semaphore二.Semaphore的使用三.Semaphore源码分析一.什么是Semaphore Semaphore，俗称信号量，它是操作系统中PV操作的原语在Java的实现，它也是基于AbstractQueuedSynchronizer实现的。
I have following multi threaded environment scenario - Requests are coming to a method and I want to avoid the duplicate processing of concurrent requests coming. As multiple similar requests might be
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