Aware

BeanNameAware

beanNameAware可以获得容器中Bean的名称，作用于每一个Bean。当bean被创建的时候设置他的名字，在基本properties填充完成以后，init调用前执行

摘自： spring-beans:5.3.4 org.springframework.beans.factory.BeanNameAware

Set the name of the bean in the bean factory that created this bean.

Invoked after population of normal bean properties but before an init callback such as {@link InitializingBean#afterPropertiesSet()} or a custom init-method.

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package com.example.demo;

import org.springframework.beans.factory.BeanNameAware;
import org.springframework.stereotype.Component;

@Component
public class BeanNameAwareDemo implements BeanNameAware {
    @Override
    public void setBeanName(String name) {
        System.out.println(name);
    }
}

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Guava

RateLimiter

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RateLimiter rateLimiter = RateLimiter.create(10);
for (int i = 0; i < 20; i++) {
    int finalI = i;
    new Thread(new Runnable() {
        @Override
        public void run() {
            int cnt = 0;
            while (true) {
                if (rateLimiter.tryAcquire()) {
                    cnt++;
                    System.out.println("thread: " + finalI + " cnt: " + cnt);
                }
            }
        }
    }).start();
}
Thread.sleep(1000 * 100 * 1000);

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