sentinel-core

1. 引入依赖

   <dependencies>
       <dependency>
           <groupId>com.alibaba.cspgroupId>
           <artifactId>sentinel-coreartifactId>
       dependency>
       <dependency>
           <groupId>com.alibaba.cspgroupId>
           <artifactId>sentinel-annotation-aspectjartifactId>
       dependency>
   dependencies>
   

2. 添加sentinel注解支持配置

   @Configuration
   public class SentinelAspectConfiguration {
       @Bean
       public SentinelResourceAspect sentinelResourceAspect() {
           return new SentinelResourceAspect();
       }
   }
   

3. 编写配置并加载

   @Slf4j
   @SpringBootApplication
   public class WebMvcApplication {
      public static void main(String[] args) {
          SpringApplication.run(WebMvcApplication.class, args) ;
          // 加载限流规则
          initFlowRules();
      }
      private static void initFlowRules(){
          log.info("load sentinel flow rule .....");
          List<FlowRule> rules = new ArrayList<>();
          FlowRule rule = new FlowRule();
          rule.setResource("HelloWorld");
          rule.setGrade(RuleConstant.FLOW_GRADE_QPS);
          // Set limit QPS to 1.
          rule.setCount(1);
          rules.add(rule);
          FlowRuleManager.loadRules(rules);
      }
   }
   

4. 业务代码编写

   @RestController
   @RequestMapping("/hello")
   public class HelloController {
       @SentinelResource("HelloWorld")
       @GetMapping("/index")
       public String index(){
           return "hello index" ;
       }
   }