springboot整合JMH基準測試， 以及錯誤JMH had finished, but forked VM did not exit, 解決辦法

首先， 需要引入jmh的包：

<!-- https://mvnrepository.com/artifact/org.openjdk.jmh/jmh-core -->
		<dependency>
			<groupId>org.openjdk.jmh</groupId>
			<artifactId>jmh-core</artifactId>
			<version>1.21</version>
			<scope>test</scope>
		</dependency>

		<!-- https://mvnrepository.com/artifact/org.openjdk.jmh/jmh-generator-annprocess -->
		<dependency>
			<groupId>org.openjdk.jmh</groupId>
			<artifactId>jmh-generator-annprocess</artifactId>
			<version>1.21</version>
			<scope>test</scope>
		</dependency>

創建測試類

package cn.ygl.demo.jmh;

import cn.ygl.demo.DemoApplication;
import cn.ygl.demo.service.JSONService;
import cn.ygl.demo.service.impl.FastJsonService;

import cn.ygl.demo.service.impl.GsonService;
import com.alibaba.fastjson.JSONObject;
import org.junit.Test;
import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.runner.Runner;
import org.openjdk.jmh.runner.RunnerException;
import org.openjdk.jmh.runner.options.Options;
import org.openjdk.jmh.runner.options.OptionsBuilder;
import org.springframework.boot.SpringApplication;
import org.springframework.context.ConfigurableApplicationContext;

import java.util.UUID;


@State(value = Scope.Thread)
public class JMHTests {

    private String reqStr;
    private ConfigurableApplicationContext context;
    private JSONService fastjsonService;
    private JSONService gsonService;

    @Test
    public void test() throws RunnerException {
        Options options = new OptionsBuilder().include(JMHTests.class.getSimpleName())
                .warmupIterations(2).measurementIterations(2).forks(1).build();
        new Runner(options).run();
    }

    @Setup
    public void init()  {
        JSONObject object = new JSONObject();
        object.put("requestId", UUID.randomUUID().toString());
        object.put("requestName", "test");
        object.put("requestData", "122345");
        object.put("requestType", "POST");
        reqStr = object.toString();
        System.err.println("init....");
        context = SpringApplication.run(DemoApplication.class);

        fastjsonService = context.getBean(FastJsonService.class);
        gsonService = context.getBean(GsonService.class);
    }

    @TearDown
    public void finish(){
        context.close();
    }

    @Benchmark
    public void testGson(){
        gsonService.getRequestId(reqStr);
    }

    @Benchmark
    public void testFastJSON(){
        fastjsonService.getRequestId(reqStr);
    }
}

@Setup默認是初始化一次的

注意， finish方法要記得關閉context， 否則會報錯誤JMH had finished, but forked VM did not exit, are there stray running threads? Waiting 24 seconds more... ， 這是因爲內嵌的tomcat線程沒結束導致的（網上有些教程並沒有添加這個@TearDown方法， 我不知道爲什麼他們不報錯， 我的會報錯， 不知道還有沒有其他人也這樣）

這樣跑基準測試的時候就不會報錯了， 結果如下：

下面貼上引入的倆個bean代碼

@Service
@Qualifier("fastjson")
public class FastJsonService implements JSONService {
    @Override
    public String getRequestId(String str) {
        return ((JSONObject)JSONObject.parse(str)).getString("requestId");
    }
}

 

@Service
@Qualifier("gson")
public class GsonService implements JSONService {

    @Override
    public String getRequestId(String str) {
        return new Gson().fromJson(str, ReqData.class).getRequestId();
    }
}