Springboot + Dubbo + Sentinel集成

1. 添加依赖

<!-- dubbo -->
<!-- Sentinel -->
<dependency>
    <groupId>com.alibaba.csp</groupId>
    <artifactId>sentinel-dubbo-adapter</artifactId>
    <version>1.8.2</version>
</dependency>
<dependency>
    <groupId>com.alibaba.csp</groupId>
    <artifactId>sentinel-transport-simple-http</artifactId>
    <version>1.8.2</version>
</dependency>

<!-- controller的限流 -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
    <version>0.2.2.RELEASE</version>
</dependency>

2. 添加启动参数

-Djava.net.preferIPv4Stack=true
-Dcsp.sentinel.api.port=8720  //指定客户端监控 API 的端口
-Dcsp.sentinel.dashboard.server=localhost:8080

3. 全局限流返回

// 作为消费者，设置消费限流的返回
DubboAdapterGlobalConfig.setConsumerFallback(new DubboFallback() {

    @Override
    public Result handle(Invoker<?> invoker, Invocation invocation, BlockException ex) {
        return new RpcResult("服务器处理不过来了，停下来休息休息");
    }
});

//controller 限流返回
WebCallbackManager.setUrlBlockHandler(new UrlBlockHandler() {

    @Override
    public void blocked(HttpServletRequest request, HttpServletResponse response, BlockException ex)
            throws IOException {
        response.setCharacterEncoding("utf-8");
        response.setContentType("application/json;charset=utf-8");
        Map<String, Object> map = new HashMap<>(16);
        map.put("rspCode", "0001");
        map.put("rspMsg", "限流了");
        response.getWriter().write(JSON.toJSONString(map));
    }
});

4. 注解支持的配置Bean

// 注解支持的配置Bean
@Bean
public SentinelResourceAspect sentinelResourceAspect() {
    return new SentinelResourceAspect();
}

自己看得懂系列，有问题可以私信我