无法让Resilience4j@RateLimiter与Spring Boot一起工作

Question

@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 ");
    }
}

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

<!-- 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>

Answer 1

我没有使用Resilience4j的经验，但看起来您正在尝试使用spring-aop。这与运行时生成的代理一起工作，该代理包装了原始类，提供了额外的功能（在本例中是速率限制）。

如果是，则不能注释类的私有方法，因为它不会被代理生成机制检测和处理。

相反，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();
        }
    }
}