需求背景

項目中快速集成·限流組件Sentinel

Tips技術點

1. 引入spring-cloud-starter-alibaba-sentinel依賴包

注：默認監控所有訪問接口

代碼演示

1. 項目目錄結構

2. pom.xml依賴組件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<artifactId>microservice-alibaba-sentinel</artifactId>
	<packaging>jar</packaging>

	<parent>
		<groupId>com.minbo.cloud.alibaba</groupId>
		<artifactId>spring-cloud-alibaba-study-parent</artifactId>
		<version>0.0.1-SNAPSHOT</version>
	</parent>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
		</dependency>
		<dependency>
			<groupId>io.springfox</groupId>
			<artifactId>springfox-swagger2</artifactId>
		</dependency>
		<dependency>
			<groupId>io.springfox</groupId>
			<artifactId>springfox-swagger-ui</artifactId>
		</dependency>
		<dependency>
			<groupId>com.github.xiaoymin</groupId>
			<artifactId>swagger-bootstrap-ui</artifactId>
		</dependency>
		<dependency>
			<groupId>net.sf.json-lib</groupId>
			<artifactId>json-lib-ext-spring</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
		</dependency>
	</dependencies>
</project>

3. bootstrap.yaml配置文件

配置sentinel

spring:
   application:
      name: microservice-alibaba-sentinel
   profiles:
      active: dev
   cloud:
      nacos:
         discovery:
            server-addr: 127.0.0.1:8848
            namespace: 2bc5565f-453f-4b1c-bde4-eafe23bdb2f0
         config:
            server-addr: 127.0.0.1:8848
            namespace: 2bc5565f-453f-4b1c-bde4-eafe23bdb2f0
            file-extension: properties
            shared-dataids: microservice-alibaba-sentinel.properties
            refreshable-dataids: microservice-alibaba-sentinel.properties
      sentinel:
         transport:
            port: 8719 # 默認數據端口
            dashboard: 127.0.0.1:9191
# server
server:
   port: 9092

對Nacos配置不熟，可以先閱讀下面兩篇文章

4. 接口類

package com.minbo.cloud.alibaba.controller;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;

/**
 * @author Minbo
 */
@RestController
@Slf4j
@Api(tags = { "init" })
public class InitController {

	@ApiOperation(value = "歡迎入口", httpMethod = "GET")
	@GetMapping("/hello")
	public String hello() {
		log.info("microservice-alibaba-sentinel");
		return "Hello, greetings from microservice-alibaba-sentinel";
	}
}

5. 啓動類

package com.minbo.cloud.alibaba;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

import com.github.xiaoymin.swaggerbootstrapui.annotations.EnableSwaggerBootstrapUI;

/**
 * 程序主入口
 * 
 * @author Minbo
 *
 */
@SpringBootApplication
@EnableSwaggerBootstrapUI
@EnableDiscoveryClient
public class Application {

	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}

}