grpc断路器之hystrix

Dear 丶 2023-07-18 11:16 6阅读 0赞

上一章介绍了grpc断路器sentinel，  
[grpc断路器之sentinel][grpc_sentinel]  
但是由于公司线上系统用的告警与监控组件是prometheus，而sentinel暂时还没有集成prometheus，所以这里就在部分线上系统还是用hystrix

#### 步骤 ####

##### 1、pom依赖 #####

<dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
            </dependency>

##### 2、启动类或者配置类中增加@EnableHystrix #####

##### 3、增加hystrixCommend注解 #####

@PostMapping("/grpc")
        @HystrixCommand(fallbackMethod = "fallbackMethod")
        public BaseResponse doGrpc(@RequestBody ReRequest rr）{
    		......
    		.......
    }
    
    public BaseResponse fallbackMethod(@RequestBody ReRequest rr）{
    		......
    		.......
    }

##### 4、yml中增加相关配置 #####

feign:
      hystrix:
        enabled: true
      okhttp:
        enabled: true
      httpclient:
        enabled: false
      compression:
        request:
          enabled: true
        response:
          enabled: true
    hystrix:
      command:
        default:
          execution:
            timeout:
              enabled: true
            isolation:
              thread:
                timeoutInMilliseconds: 1000
          circuitBreaker:
            requestVolumeThreshold: 50
      threadpool:
        default:
          coreSize: 60
          maxQueueSize: 200
          queueSizeRejectionThreshold: 200

需要注意的是grpc也会有超时时间，这里断路器设置超时时间应该比grpc超时时间大。

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[grpc_sentinel]: https://blog.csdn.net/lp19861126/article/details/105055272
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xwMTk4NjExMjY_size_16_color_FFFFFF_t_70 1]: /images/20230528/3c3270261a5f4d8090ea598808b0bc9b.png