我需要使用微米级的 @Timed 注解来测量方法参数。由于它不能在任意方法上工作,我在spring配置中明确添加了@TimedAspect的配置。我参考了这篇帖子来了解确切的配置注:我试着添加了一个单独的配置类来实现这个功能,同时也把TimedAspect Bean作为现有配置Bean的一部分。
然而,不幸的是,它并没有工作。Bean是注册过的,启动时从config类调用成功。调试时发现了这个问题。然而,@Around中的代码似乎从来没有执行过,没有抛出任何错误,并且能够在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使 "方法 "被多次调用之后。我知道,如果方法根本没有被调用,它可能不会显示在度量中。
版本:弹簧螺栓2.1.1,弹簧5.3,千分尺1.1.4,执行器2.1。
按照下面的帖子尝试了所有的方法。
https:/github.comizeyesample-micrometer-spring-boottreettimed-annotation。
https:/github.commicrometer-metricsmicrometerissues361。
更新:所以,这个问题似乎只有当Timed是在一个抽象方法上,而这个抽象方法是通过另一个方法调用的。通过一个简单的例子,能够重现这个问题。 参考@Timed("say_hello_example")注解。当我点击prometheus端点时,它只是被忽略了,并且没有显示出来。
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();
}
}
Impl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>
我使用的是spring boot 2.2.6.释放 而这个MetricConfig为我工作
@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