package com.alipay.bluewhale.core.utils;
import java.util.Random;
import java.util.concurrent.atomic.AtomicInteger;
/**
* ��������ʵ�֣��ص�����freqƵ���ڿ϶��ᱻִ��һ�Σ������ıȽϾ���
* Ŀǰ����task���tupleͳ��
* @author yannian
*
*/
public class EvenSampler {
private volatile int freq;
private AtomicInteger i=new AtomicInteger(-1);
private volatile int target;
private Random r = new Random();
public EvenSampler(int freq) {
this.freq = freq;
this.target = r.nextInt(freq);
}
public boolean getResult() {
i.incrementAndGet();
if (i.get() >= freq) {
target = r.nextInt(freq);
i.set(0);
}
if (i.get()==target) {
return true;
}
return false;
}
}