Spring工具类StopWatch

StopWatch是Spring提供的工具类，可以统计分析线程执行的时间、占比情况。
含义源码分析可以参考：https://blog.csdn.net/sober_snail/article/details/120393440

StopWatch每次只能分析一个线程的执行情况，StopWatch提供API：

• isRunning()，当前是否有正在分析的线程
• start()，开始分析当前线程
• stop()，停止分析当前线程
• prettyPrint()，打印统计过的线程情况

StopWatch进行再封装：

import org.springframework.util.StopWatch;
import com.sf.nwms.core.util.common.LogTextHolder;
import com.sf.nwms.core.util.common.LogUtil;

import lombok.extern.slf4j.Slf4j;

@Slf4j
public class StopWatchUtil {

    // 线程独有
    private static final ThreadLocal<StopWatch> threadLocal = new ThreadLocal<StopWatch>() {
        @Override
        protected StopWatch initialValue() {
            return new StopWatch("性能跟踪");
        }

    };

    // 线程执行开始调用
    public static void start(String tastName) {
        try {
            StopWatch stopWatch = threadLocal.get();
            if (stopWatch.isRunning()) {
                stopWatch.stop();
            }
            stopWatch.start(tastName);
        } catch (Exception e) {
            LogUtil.errorLog(log, () -> LogTextHolder.instance("exception occured during start:{}", e));
        }

    }

    // 线程结束前调用
    public static void stop() {
        try {
            StopWatch stopWatch = threadLocal.get();
            if (stopWatch.isRunning()) {
                stopWatch.stop();
            }
        } catch (Exception e) {
            LogUtil.errorLog(log, () -> LogTextHolder.instance("exception occured during stop:{}", e));
        }
    }

    // 打印各个线程的执行情况
    public static void print() {
        StopWatch stopWatch = threadLocal.get();
        LogUtil.infoLog(log, () -> LogTextHolder.instance("性能耗时跟踪日志 = {}", stopWatch.prettyPrint()));
    }

    public static void main(String[] args) {
        
        // StopWatch每次只能统计一个线程，执行完放到List中，print打印遍历所有线程执行信息
        for (int i = 0; i < 4; i++) {
            //调用Thread的currentThread()方法获取当前线程
            int finalI = i;
            Runnable test = new Runnable() {
                @Override
                public void run() {
                    StopWatchUtil.start("test1"+ finalI);
                    try {
                        Thread.sleep(10);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    StopWatchUtil.stop();
                    StopWatchUtil.start("test2"+finalI);
                    try {
                        Thread.sleep(10);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    StopWatchUtil.stop();
                    StopWatchUtil.print();
                }
            };
            test.run();
        }

    }

}

执行结果：

10:48:45.867 [main] INFO StopWatchUtil - 性能耗时跟踪日志 = StopWatch '性能跟踪': running time (millis) = 40
-----------------------------------------
ms     %     Task name
-----------------------------------------
00025  062%  test10
00015  038%  test20

10:48:45.907 [main] INFO StopWatchUtil - 性能耗时跟踪日志 = StopWatch '性能跟踪': running time (millis) = 74
-----------------------------------------
ms     %     Task name
-----------------------------------------
00025  034%  test10
00015  020%  test20
00019  026%  test11
00015  020%  test21

10:48:45.939 [main] INFO StopWatchUtil - 性能耗时跟踪日志 = StopWatch '性能跟踪': running time (millis) = 106
-----------------------------------------
ms     %     Task name
-----------------------------------------
00025  024%  test10
00015  014%  test20
00019  018%  test11
00015  014%  test21
00016  015%  test12
00016  015%  test22

10:48:45.970 [main] StopWatchUtil - 性能耗时跟踪日志 = StopWatch '性能跟踪': running time (millis) = 136
-----------------------------------------
ms     %     Task name
-----------------------------------------
00025  018%  test10
00015  011%  test20
00019  014%  test11
00015  011%  test21
00016  012%  test12
00016  012%  test22
00015  011%  test13
00015  011%  test23