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服务断路器_Resilience4j超时降级

news 2025/8/29 6:11:28

创建模块cloud-consumer-resilience4j-order80

POM引入依赖

<dependencies><!--  引入Eureka 客户端依赖   --><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-client</artifactId></dependency><!--   引入服务调用依赖 OpenFigen   --><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-openfeign</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.18.22</version></dependency><!-- actuator监控信息完善 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><dependency><groupId>io.github.resilience4j</groupId><artifactId>resilience4j-spring-cloud2</artifactId>
</dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-circuitbreaker-resilience4j</artifactId>
</dependency></dependencies>

修改YML文件

server:port: 80eureka:instance:#实例名字instance-id: cloud-order-resilience4j-consumer80client:# Eureka Server地址service-url:# 单机Eureka server 地址# defaultZone: http://localhost:7001/eurekadefaultZone: http://localhost:7001/eureka/,http://localhost:7002/eureka/spring:application:# 设置应用名字name: cloud-order-consumerlogging:level:com.hgy.service: debug# 超时机制
resilience4j:timelimiter:instances:delay:# 设置超时时间 5秒timeoutDuration: 2

编写服务提供者提供超时方法

  /*** 超时服务* @return*/@GetMapping("timeout")public String timeout(){try {TimeUnit.SECONDS.sleep(5);} catch (InterruptedException e) {e.printStackTrace();}return "success";}

编写服务提供者Controller

@GetMapping("/timeout")
@TimeLimiter(name = "delay",fallbackMethod = "timeoutfallback")public CompletableFuture<String> timeout() {log.info("********* 进入方法 ******");//异步操作CompletableFuture<String> completableFuture = CompletableFuture.supplyAsync((Supplier<String>) () -> (paymentFeignService.timeout()));log.info("********* 离开方法 ******");return completableFuture;}

编写服务降级方法

  /*** 超时服务降级方法* @param e* @return*/public CompletableFuture<ResponseEntity> timeoutfallback(Exception e){e.printStackTrace();return CompletableFuture.completedFuture(ResponseEntity.ok("超时啦"));}