无法让Resilience4j @RateLimiter使用Spring

Question

我似乎无法让Resilience4j @RateLimiter使用Spring。

下面是代码

@Log4j2
@Component
class Resilience4jDemo implements CommandLineRunner {

    @Override
    public void run(String... args) throws Exception {
        for (int i = 0; i < 100; i++) {
            callBackendA();
        }
    }

    @RateLimiter(name = "backendA")
    private void callBackendA() {
        log.info("Calling ");
    }
}

application.yaml文件

resilience4j.ratelimiter:
  instances:
    backendA:
      limitForPeriod: 1
      limitRefreshPeriod: 10s
      timeoutDuration: 0

pom.xml

<!-- https://mvnrepository.com/artifact/io.github.resilience4j/resilience4j-spring-boot2 -->
<dependency>
    <groupId>io.github.resilience4j</groupId>
    <artifactId>resilience4j-spring-boot2</artifactId>
    <version>1.7.1</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-actuator -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
    <version>2.6.0</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-aop -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-aop</artifactId>
    <version>2.6.0</version>
</dependency>

没有利率限制。不知道我错过了什么。

Answer 1

我没有使用Resilience4j的经验，但是看起来您在这里尝试使用spring。这适用于包含原始类的运行时生成的代理，该代理提供了额外的功能(在本例中是限制速率的)。

如果是这样的话，您就不能注释类的私有方法，因为代理生成机制不会检测和处理它。

相反，请考虑创建另一个bean，并将其功能公开为公共方法：

public interface Backend {
   void callBackendA();
}

@Component // this is a spring bean!
@Log4j2
public class LoggingBackendImpl implements Backend {
   @RateLimiter(name = "backendA")
   public void callBackendA() {
      log.info("calling backend");
   }
}


@Component
class Resilience4jDemo implements CommandLineRunner {
    @Autowired
    Backend backend;  // this has to be managed by spring 

    @Override
    public void run(String... args) throws Exception {
        for (int i = 0; i < 100; i++) {
            backend.callBackendA();
        }
    }
}