Springboot: micrometer metrics not showing up

Question

I am writing my first spring boot (2.6.3) application.

Here the relevant dependencies I am using:

<dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-dependencies</artifactId> <version>2.6.3</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <exclusions> <exclusion> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-api</artifactId> </exclusion> <exclusion> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-to-slf4j</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-validation</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>io.micrometer</groupId> <artifactId>micrometer-registry-prometheus</artifactId> <scope>runtime</scope> </dependency> </dependencies>

I exposed by actuator all the features:

management: endpoint: health: show-details: always endpoints: web: exposure: include: '*' info: env: enabled: true

So I can see all the endpoints listed by the url /actuator.

Now, I added some annotations like @Counted and @Timed to some methods, I invoked them, but they don't show up into /actuator/metrics.

How could I solved that issue?

Thank you so much in advance!

Does this answer your question? How to measure service methods using spring boot 2 and micrometer — Chin Huang
– Chin Huang, Commented Feb 3, 2022 at 17:38
The Micrometer developer said never count something you can time. Timers include a count. — Chin Huang
– Chin Huang, Commented Feb 3, 2022 at 17:52

Kerkhofsd · Accepted Answer · 2022-02-03 17:40:56Z

Are you aware that @Timed annotations are supported on @Controller classes and @RequestMapping methods only?

https://docs.spring.io/spring-boot/docs/current/reference/html/actuator.html#actuator.metrics.supported.spring-mvc

I am not sure @Counted is supported by default.

EDIT: The @Counted annotation doesn't work by default. To make it work, you'll need to add an CountedAspect to your context.

See: https://github.com/micrometer-metrics/micrometer/blob/main/micrometer-core/src/main/java/io/micrometer/core/aop/CountedAspect.java

Also, there's an open issue for @Counter auto-configuration: https://github.com/spring-projects/spring-boot/issues/17260

I generated all the stuffs by Maven OpenAPI generator plugin using the Delegate Pattern. It generates the API interface, implemented by the Controller, and the latter one uses my delegate where I placed the meter annotations. Can they work here?

Antonio Petricca · Accepted Answer · 2022-02-04 08:32:13Z

Solved by adding the following:

@Bean CountedAspect countedAspect(MeterRegistry registry) { return new CountedAspect(registry); }

<dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.8.13</version> </dependency>

It works with OpenAPI delegates too.

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