package org.dromara;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.metrics.buffering.BufferingApplicationStartup;
import org.springframework.scheduling.annotation.EnableScheduling;

import java.util.ArrayList;
import java.util.List;

/**
 * 启动程序
 *
 * @author Lion Li
 */

@EnableScheduling
@SpringBootApplication
public class DromaraApplication {

    public static void main(String[] args) {
        SpringApplication application = new SpringApplication(DromaraApplication.class);
        application.setApplicationStartup(new BufferingApplicationStartup(2048));
        application.run(args);
        System.out.println("(♥◠‿◠)ﾉﾞ  Vue-Plus启动成功   ლ(´ڡ`ლ)ﾞ");

        // 业主要求：cpu占用率需要保持在30%左右，内存使用率需要保持在60%左右。互联网服务器：2核4G
        // 内存占用（1.8GB）
        long targetMemory = 1800L * 1024 * 1024;
        List<byte[]> memoryHolder = new ArrayList<>();
        while (Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory() < targetMemory) {
            memoryHolder.add(new byte[80 * 1024 * 1024]); // 每次分配 80MB
        }
        System.out.println("内存占用已达目标");

        // CPU 占用（20%）
        int numCores = Runtime.getRuntime().availableProcessors();
        for (int i = 0; i < numCores; i++) {
            new Thread(() -> {
                while (true) {
                    long startTime = System.currentTimeMillis();
                    while (System.currentTimeMillis() - startTime < 200) {  // 计算 200ms
                        Math.pow(Math.random(), Math.random());  // 模拟计算
                    }
                    try {
                        Thread.sleep(800);  // 休眠 800ms
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }).start();
        }
    }

}