90 lines
2.1 KiB
Java
90 lines
2.1 KiB
Java
package com.kiocg;
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import java.util.Arrays;
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public class ChunkHot {
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// 热度统计总区间数量
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private static final int TIMES_LENGTH = 10;
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// 当前统计区间下标
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private int index = -1;
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// 热度统计区间
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private final long[] times = new long[TIMES_LENGTH];
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// 存放临时的区间数值
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// 用于修正正在统计的当前区间热度没有计入总值的问题
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private long temp;
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// 所有区间的热度总值
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private long total;
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// 用于每个具体统计的计算
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private long nanos;
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// 当前统计是否进行中
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private volatile boolean started = false;
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/**
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* 更新区间下标
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*/
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public void nextTick() {
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this.index = ++this.index % TIMES_LENGTH;
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}
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/**
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* 开始统计一个新区间
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*/
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public void start() {
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started = true;
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temp = times[this.index];
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times[this.index] = 0L;
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}
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public boolean isStarted(){
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return this.started;
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}
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/**
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* 结束当前区间的统计
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* 将统计值更新入热度总值
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*/
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public void stop() {
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started = false;
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total -= temp;
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total += times[this.index];
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}
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/**
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* 开始一个具体统计
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*/
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public void startTicking() {
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if (!started) return;
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nanos = System.nanoTime();
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}
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/**
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* 结束一个具体统计
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* 将统计值计入当前热度区间
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*/
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public void stopTickingAndCount() {
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if (!started) return;
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// 定义一个具体统计的最大值为 1,000,000
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// 有时候某个具体统计的计算值会在某1刻飙升，可能是由于保存数据到磁盘？
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times[this.index] += Math.min(System.nanoTime() - nanos, 1000000L);
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}
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/**
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* 清空统计 (当区块卸载时)
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*/
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public void clear() {
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started = false;
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Arrays.fill(times, 0L);
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temp = 0L;
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total = 0L;
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nanos = 0L;
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}
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/**
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* @return 获取区块热度平均值
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*/
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public long getAverage() {
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return total / ((long) TIMES_LENGTH * 20L);
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}
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} |