简介
Google 出的 Guava 是 Java 核心增强的库，应用非常广泛。
Guava RateLimiter 简单例子
整理自本人的有道历史云笔记
package com.dbyz.base.guava;
import com.google.common.util.concurrent.RateLimiter;
import lombok.extern.slf4j.Slf4j;
import java.time.Duration;
/**
* RateLimiterTest
*
* @author fangzheng
*/
@Slf4j
@SuppressWarnings("UnstableApiUsage")
public class RateLimiterTest {
public static void main(String[] args) {
/**
* 速率控制器 SmoothBursty extends SmoothRateLimiter
* 速率相同
*/
RateLimiter rateLimiter = RateLimiter.create(2);
for (int i = 0; i < 20; i++) {
rateLimiter.acquire();
log.info("SmoothBursty {}", i);
}
/**
* 预热速率控制器 SmoothWarmingUp
* warmupPeriod 前较慢,后面变快,然后匀速
*/
rateLimiter = RateLimiter.create(5, Duration.ofSeconds(1));
for (int i = 0; i < 20; i++) {
rateLimiter.acquire();
log.info("SmoothWarmingUp {}", i);
}
}
}
