尽管明确注册了 TimedAspect，@Timed 仍然无法工作 - spring boot 2.1

Question

我需要使用测微计@Timed 注释来测量方法度量。因为它不适用于任意方法；我在 spring 配置中明确添加了 @TimedAspect 的配置。已经参考这篇文章以获得精确的配置注意：已经尝试为此添加一个单独的配置类，以及将 TimedAspect bean 作为我现有配置 bean 的一部分

如何使用弹簧靴2和千分尺测量服务方法

然而，不幸的是它不起作用。Bean 已注册，并且从配置类调用在启动时成功通过。调试的时候发现的。但是，@Around 中的代码似乎永远不会执行。不会抛出任何错误；并且我能够在 /metrics 和 /prometheus 端点上查看默认的“系统”指标。

注意：这是在通过执行业务流多次调用“方法”之后。我知道如果根本没有调用该方法，它可能不会出现在指标中

版本：弹簧靴 2.1.1、弹簧 5.3、千分尺 1.1.4、执行器 2.1

尝试了以下帖子的所有内容：

如何使用弹簧靴2和千分尺测量服务方法

https://github.com/izeye/sample-micrometer-spring-boot/tree/timed-annotation

https://github.com/micrometer-metrics/micrometer/issues/361

更新：因此，问题似乎仅在 Timed 位于抽象方法上时才出现，该方法通过另一种方法调用。能够通过一个简单的例子重现它。请参阅@Timed("say_hello_example") 注释。当我点击 prometheus 端点时，它只会被忽略并且不会出现。

代码：抽象类

public abstract class AbstractUtil {
    public abstract void sayhello();

    public void sayhellowithtimed(String passedVar) {
        System.out.println("Passed var =>"+passedVar);
        System.out.println("Calling abstract sayhello....");
        sayhello();

    }
}

实现类

@Component
@Scope("prototype")
public class ExampleUtil extends AbstractUtil  {

    public static final String HELLO = "HELLO";

    @Timed("dirwatcher_handler")
    public void handleDirectoryWatcherChange(WatchEvent event){
        System.out.println("Event kind:" + event.kind() + ". File affected: " + event.context());
    }

    @Timed("say_hello_example")
    @Override
    public void sayhello() {
        System.out.println(HELLO);
        try {
            Thread.sleep(1000);
        }
        catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

一个简单的 DirWatcher 实现类...

package com.example;
            
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.event.ApplicationStartedEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.Scope;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.stereotype.Component;
            
import java.io.IOException;
import java.nio.file.*;
            
@Component
@Scope("prototype")
public class StartDirWatcher implements ApplicationListener<ApplicationStartedEvent> {
            
    @Value("${directory.path:/apps}")
    public String directoryPath;
            
    @Autowired
    private ExampleUtil util;
            
    private void monitorDirectoryForChanges() throws IOException, InterruptedException {
        WatchService watchService = FileSystems.getDefault().newWatchService();
        Path path = Paths.get(directoryPath);
        path.register(
            watchService,
            StandardWatchEventKinds.ENTRY_CREATE,
            StandardWatchEventKinds.ENTRY_DELETE,
            StandardWatchEventKinds.ENTRY_MODIFY);
        WatchKey key;
        while ((key = watchService.take()) != null) {
            for (WatchEvent<?> event : key.pollEvents()) {
                util.handleDirectoryWatcherChange(event);
                util.sayhellowithtimed("GOD_OF_SMALL_THINGS_onAPPEvent");
            }
            key.reset();
        }
    }
            
    @Override
    public void onApplicationEvent(ApplicationStartedEvent applicationStartedEvent) {
        try {
            monitorDirectoryForChanges();
        } catch (Throwable e) {
            System.err.println("ERROR!! "+e.getMessage());
            e.printStackTrace();
        }
    }
}

Spring Boot 应用程序类

package com.example;

import io.micrometer.core.aop.TimedAspect;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.prometheus.PrometheusMeterRegistry;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.actuate.autoconfigure.metrics.MeterRegistryCustomizer;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;

@EnableAspectJAutoProxy
@ComponentScan
@Configuration
@SpringBootApplication
public class ExampleStarter{

    @Bean
    MeterRegistryCustomizer<PrometheusMeterRegistry> metricsCommonTags() {
        return registry -> registry.config().commonTags("app.name", "example.app");
    }
    @Bean
    TimedAspect timedAspect(MeterRegistry reg) {
        return new TimedAspect(reg);
    }

    public static void main(String[] args) {
        SpringApplication.run(ExampleStarter.class, args);
    }

}

主要的 pom.xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>com.metrics.timed.example</groupId>
<artifactId>example-app</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
    </plugins>
</build>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <version>2.1.1.RELEASE</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
        <version>2.1.1.RELEASE</version>
    </dependency>
    <dependency>
    <groupId>io.micrometer</groupId>
    <artifactId>micrometer-registry-prometheus</artifactId>
    <version>1.1.2</version>
</dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-aop</artifactId>
        <version>2.1.1.RELEASE</version>
    </dependency>
</dependencies>

Answer 1

我使用 spring boot 2.2.6.RELEASE，这个 MetricConfig 对我有用

@Configuration
public class MetricConfig {

  @Bean
  MeterRegistryCustomizer<MeterRegistry> metricsCommonTags() {
    return registry -> registry.config().commonTags("application", "my app");
  }

  @Bean
  TimedAspect timedAspect(MeterRegistry registry) {
    return new TimedAspect(registry);
  }

}

在application.yml中

management:
  endpoints:
    web:
      exposure:
        include: ["health", "prometheus"]
  endpoint:
    beans:
      cache:
        time-to-live: 10s