Sentinel热点限流

    <!--导入热点参数限流依赖包-->
    <dependency>
        <groupId>com.alibaba.csp</groupId>
        <artifactId>sentinel-parameter-flow-control</artifactId>
        <version>1.7.1</version>
    </dependency>

@RestController
public class ParamRuleController {
    // com.xmaven.controller.ParamRuleController:sayHello(java.lang.String)
    private String resourceName="sayHello";

    @GetMapping("/hello1")
    @ResponseBody
    public String sayHello(@PathParam("id")String id, @PathParam("name")String name){
        Entry entry=null;
        try {
            // 只对参数id进行限流，参数name不进行限制
            entry= SphU.entry(resourceName, EntryType.IN,1,id);
            return "access success";
        } catch (BlockException e) {
            e.printStackTrace();
            return "block";
        }finally {
            if(entry!=null) {
                entry.exit();
            }
        }
    }

    @PostConstruct
    public void initParamRule(){
        ParamFlowRule rule = new ParamFlowRule(resourceName);
        rule.setParamIdx(0);
        rule.setGrade(RuleConstant.FLOW_GRADE_QPS);
        rule.setCount(1);
        ParamFlowRuleManager.loadRules(Collections.singletonList(rule));
    }

}

@SentinelResource
@GetMapping("/hello2")
@ResponseBody
public String sayHello2(@PathParam("id")String id){
    return "SUCCESS";
}