【Java开发】使用Semaphore控制资源访问并发量

//设置信号量的容量为10，超过10后，则在队列排队。  
//tryAcquire()尝试向信号器获取一个信号量   
//release()释放信号量
	static final int productThreadNum=10;
	static final int productTimeOut=50;
	static final int productQueueLenth=1000;
	static final Semaphore productSemaphore=new Semaphore(productThreadNum,true);
	public static boolean tryAcquireProduct() throws InterruptedException{
		 int count=productSemaphore.getQueueLength();
		 log.info("当前等待线程：{}",count);
		 if(count>productQueueLenth){
			 throw new LogicalException("购买人数过多，请稍后重试");
		 }
		return productSemaphore.tryAcquire(productTimeOut, TimeUnit.SECONDS);
	}
	public static void releaseProuct(){
		productSemaphore.release();
	}

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