SpringCloud实战三十九：SentinelResource

1、按资源名称限流

• 控制器

@RestController
public class Ratelimitcontroller {

    @GetMapping("/byResource")
    @SentinelResource(value = "byResource", blockHandler = "handleException")
    public CommonResult byResource(){
        return new CommonResult(200, "按资源名称限流测试OK", new Payment(2020L, "serial001"));
    }
    public CommonResult handleException(BlockException exception){
        return new CommonResult(444, exception.getClass().getCanonicalName()+ "\t" + "服务不可用");
    }
}

• 配置流控：

• 访问测试：

2、按URL限流

• 控制器

@GetMapping("/rateLimit/byUrl")
@SentinelResource(value = "byUrl")
public CommonResult byUrl(){
    return new CommonResult(200, "按URL限流测试OK", new Payment(2020L, "serial002"));
}

• 配置流控

• 访问测试

按url限流不会调用自定义的异常方法，而是默认的提示

3、自定义全局限流

• 自定义全局限流类

public class CustomerBlockHandle {

    public static CommonResult handleException(BlockException exception){
        return new CommonResult(4444, "按客户自定义,全局异常------1");
    }
    public static CommonResult handleException2(BlockException exception){
        return new CommonResult(4444, "按客户自定义,全局异常------2");
    }
}

• 控制器

@GetMapping("/rateLimit/customerBlockHandler")
@SentinelResource(value = "customerBlockHandler",
        blockHandlerClass = CustomerBlockHandle.class,
        blockHandler = "handleException2"
)
public CommonResult customerBlockHandler(){
    return new CommonResult(200, "按客户自定义限流测试OK", new Payment(2020L, "serial003"));
}

• 配置限流

选择按名称限流：

• 访问测试

限流异常走指定的类CustomerBlockHandle的方法handleException2