Spring Cloud Alibaba 之 Sentinel 限流规则和控制台实例

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<dependency>
    <groupId>com.alibaba.csp</groupId>
    <artifactId>sentinel-core</artifactId>
    <version>1.7.1</version>
</dependency>

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<dependency>
    <groupId>com.alibaba.csp</groupId>
    <artifactId>sentinel-annotation-aspectj</artifactId>
    <version>1.7.1</version>
</dependency>

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@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        SpringApplication.run(ServiceApplication.class, args);
    }
}
@RestController
public class TestController {

    @Autowired
    private TestService service;

    @GetMapping(value = "/hello/{name}")
    public String apiHello(@PathVariable String name) {
        return service.sayHello(name);
    }
}

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@Service
public class TestService {

    @PostConstruct
    private void initFlowRules(){
        List<FlowRule> rules = new ArrayList<>();
        FlowRule rule = new FlowRule();
        rule.setResource("HelloWorld");
        rule.setGrade(RuleConstant.FLOW_GRADE_QPS);
        // 设置QPS为1
        rule.setCount(1);
        rules.add(rule);
        FlowRuleManager.loadRules(rules);
    }

    @SentinelResource(value = "HelloWorld",blockHandler="degradeMethod")
    public String sayHello(String name) {
        return "Hello, "   name;
    }

    /**
     * 降级方法，限流后应用
     * @return
     */
    public String degradeMethod(String name, BlockException blockException){

        return "请求被限流,触发限流规则=" blockException.getRule().getResource();
    }

}

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<dependency>
    <groupId>com.alibaba.csp</groupId>
    <artifactId>sentinel-transport-simple-http</artifactId>
    <version>1.7.1</version>
</dependency>

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<dependency>
    <groupId>com.alibaba.csp</groupId>
    <artifactId>sentinel-apache-dubbo-adapter</artifactId>
    <version>${version}</version>
</dependency>

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<dependency>
    <groupId>com.alibaba.csp</groupId>
    <artifactId>sentinel-dubbo-adapter</artifactId>
    <version>${version}</version>
</dependency>

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<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
</dependency>