Sentinel限流的使用方法

这篇文章主要讲解了"Sentinel限流的使用方法"，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习"Sentinel限流的使用方法"吧！

Sentinel 系列教程-使用Sentinel限流

前言： Sentinel 是由alibaba出品的，针对于系统负载保护的组件，其有丰富的流量防护手段和多样化的流量整型策略而被广大使用。 以下是转自Sentinel官方的介绍： 随着微服务的流行，服务和服务之间的稳定性变得越来越重要。Sentinel 是面向分布式服务架构的轻量级流量控制组件，主要以流量为切入点，从限流、流量整形、熔断降级、系统负载保护等多个维度来帮助您保障微服务的稳定性。 Sentinel-wiki Sentinel GitHub wiki 有兴趣的童鞋可以去了解。

本文以Sentinel 1.6.3 为例；

引入sentinel-core

    com.alibaba.csp    sentinel-core    1.6.3

加载规则信息

private static final String RESOURCE_NAME = "hello";/** * 加载限流规则 */public static void loadRules(){    List rules = new ArrayList();    FlowRule flowRule = new FlowRule();    flowRule.setResource(RESOURCE_NAME); //资源名    flowRule.setLimitApp("default");//default 代表对所有应用生效    flowRule.setGrade(RuleConstant.FLOW_GRADE_QPS); //限流阈值类型    flowRule.setCount(10); //阈值    rules.add(flowRule);    FlowRuleManager.loadRules(rules);}

添加资源入口处理限流异常

/** * 执行方法 * @param hello */public static void hello(String hello){    Entry entry = null;    try {        entry = SphU.entry(RESOURCE_NAME);        log.info("args hello value is {}",hello);    }catch (Exception e){        if(FlowException.isBlockException(e)){            log.error("block resourceName: {}",RESOURCE_NAME);        }    }finally {        if(entry !=null){            entry.exit();        }    }}

模拟调用测试

public static void main(String[] args) {    loadRules();    for(int i=0;i<20;i++){        hello("hello"+i);    }}

运行记录

15:26:08.453 [main] INFO com.example.sentinel.sentineldemo.SampleFlowDemo - args hello value is hello015:26:08.458 [main] INFO com.example.sentinel.sentineldemo.SampleFlowDemo - args hello value is hello115:26:08.458 [main] INFO com.example.sentinel.sentineldemo.SampleFlowDemo - args hello value is hello215:26:08.458 [main] INFO com.example.sentinel.sentineldemo.SampleFlowDemo - args hello value is hello315:26:08.459 [main] INFO com.example.sentinel.sentineldemo.SampleFlowDemo - args hello value is hello415:26:08.459 [main] INFO com.example.sentinel.sentineldemo.SampleFlowDemo - args hello value is hello515:26:08.459 [main] INFO com.example.sentinel.sentineldemo.SampleFlowDemo - args hello value is hello615:26:08.459 [main] INFO com.example.sentinel.sentineldemo.SampleFlowDemo - args hello value is hello715:26:08.459 [main] INFO com.example.sentinel.sentineldemo.SampleFlowDemo - args hello value is hello815:26:08.459 [main] INFO com.example.sentinel.sentineldemo.SampleFlowDemo - args hello value is hello915:26:08.492 [main] ERROR com.example.sentinel.sentineldemo.SampleFlowDemo - block resourceName: hello15:26:08.492 [main] ERROR com.example.sentinel.sentineldemo.SampleFlowDemo - block resourceName: hello15:26:08.493 [main] ERROR com.example.sentinel.sentineldemo.SampleFlowDemo - block resourceName: hello15:26:08.493 [main] ERROR com.example.sentinel.sentineldemo.SampleFlowDemo - block resourceName: hello15:26:08.493 [main] ERROR com.example.sentinel.sentineldemo.SampleFlowDemo - block resourceName: hello15:26:08.493 [main] ERROR com.example.sentinel.sentineldemo.SampleFlowDemo - block resourceName: hello15:26:08.493 [main] ERROR com.example.sentinel.sentineldemo.SampleFlowDemo - block resourceName: hello15:26:08.493 [main] ERROR com.example.sentinel.sentineldemo.SampleFlowDemo - block resourceName: hello15:26:08.493 [main] ERROR com.example.sentinel.sentineldemo.SampleFlowDemo - block resourceName: hello15:26:08.494 [main] ERROR com.example.sentinel.sentineldemo.SampleFlowDemo - block resourceName: hello

感谢各位的阅读，以上就是"Sentinel限流的使用方法"的内容了，经过本文的学习后，相信大家对Sentinel限流的使用方法这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是，小编将为大家推送更多相关知识点的文章，欢迎关注！