小编Poo*_*ima的帖子

我正在使用Guava 18.0 RateLimiter:

public static void simpleTst() throws Exception{
    RateLimiter lt = RateLimiter.create(2);
    _log.info("Acquired one " + lt.tryAcquire());
    _log.info("Acquired two " + lt.tryAcquire());
}

输出是:

: 08 16:22:10 PST.INFO1*RateLimiterTst~simpleTst@37: Acquired one true
: 08 16:22:10 PST.INFO1*RateLimiterTst~simpleTst@38: Acquired two false

指定许可证数量12:

public static void simpleTst() throws Exception{
    RateLimiter lt = RateLimiter.create(2);
    _log.info("Acquired one " + lt.tryAcquire(12));
    _log.info("Acquired two " + lt.tryAcquire());
}

输出是:

: 08 16:22:36 PST.INFO1*RateLimiterTst~simpleTst@37: Acquired one true
: 08 16:22:36 PST.INFO1*RateLimiterTst~simpleTst@38: Acquired two false

为什么会这样？