使用弹簧Boot的Resilience4J断路器的Bean配置

<dependency>
    <groupId>io.github.resilience4j</groupId>
    <artifactId>resilience4j-spring-boot2</artifactId>
    <version>1.7.0</version>
</dependency>

import io.github.resilience4j.circuitbreaker.CircuitBreakerConfig;
import io.github.resilience4j.circuitbreaker.CircuitBreakerRegistry;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class Resilience4JConfig {

    @Bean
    public CircuitBreakerRegistry circuitBreakerRegistry() {
        CircuitBreakerConfig config = CircuitBreakerConfig.custom()
                .failureRateThreshold(50)
                .waitDurationInOpenState(Duration.ofMillis(1000))
                .permittedNumberOfCallsInHalfOpenState(2)
                .slidingWindowSize(5)
                .build();

        return CircuitBreakerRegistry.of(config);
    }
}

import io.github.resilience4j.circuitbreaker.CircuitBreaker;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class MyController {

    @Autowired
    private CircuitBreakerRegistry circuitBreakerRegistry;

    @GetMapping("/hello")
    @CircuitBreaker(name = "helloCircuitBreaker")
    public String hello() {
        // 调用需要容错处理的方法
        return "Hello, World!";
    }
}