SpringCloud Ablibab之Nacos

Myth丶恋晨 2022-10-07 02:00 200阅读 0赞

# SpringCloud Ablibab之Nacos #

## Nacos简介 ##

Nacos 提供了一组简单易用的特性集，帮助您快速实现`动态服务发现、服务配置、服务元数据及流量管理`。

Nacos 帮助可以帮助我们更敏捷和容易地构建、交付和管理微服务平台。 Nacos 是构建以“服务”为中心的现代应用架构 (例如微服务范式、云原生范式) 的服务基础设施。

### 搭建环境 ###

[Dcoker安装Nacos][Dcoker_Nacos]

首先添加配置到配置中心  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW96aHV6aHV5YW5n_size_16_color_FFFFFF_t_70]添加配置  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW96aHV6aHV5YW5n_size_16_color_FFFFFF_t_70 1]

这里我是用的是 alibaba 2.1.2

创建父项目  
父项目导入依赖

<dependencyManagement>
         <dependencies>
             <dependency>
                 <groupId>org.springframework.cloud</groupId>
                 <artifactId>spring-cloud-dependencies</artifactId>
                 <version>Hoxton.SR11</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>
                 <version>2.3.10.RELEASE</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
             <dependency>
                 <groupId>com.alibaba.cloud</groupId>
                 <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                 <version>2.1.2.RELEASE</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
         </dependencies>
     </dependencyManagement>
     <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
                <optional>true</optional>
                <scope>true</scope>
            </dependency>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
            </dependency>
        </dependencies>

创建goods子项目  
导入依赖

<dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
            </dependency>
        </dependencies>

application.tml配置文件

server:
      port: 8801
    spring:
      application:
        name: goods-service
      cloud:
        nacos:
          discovery:
            server-addr: 47.100.68.143:8848

bootstrap.yml

spring:
      cloud:
        nacos:
          config:
            server-addr: 47.100.68.143:8848
            prefix: goods-service
            file-extension: yaml
      profiles:
        active: dev

主启动类

@EnableDiscoveryClient
    @SpringBootApplication
    public class GoodsServiceMain8801 { 
        public static void main(String[] args) { 
            SpringApplication.run(GoodsServiceMain8801.class,args);
        }
    }

实体类

@Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class Goods { 
        private Long id;
        private String name;
        private Double price;
    }

service层

@Service
    public class GoodsService { 
        public Goods findGoods(){ 
            return new Goods(1L,"MI笔记本5400",5555.0);
        }
    }

GoodsController

@RestController
    @RequestMapping("provider")
    public class GoodsController { 
    
        @Autowired
        private GoodsService goodsService;
    
        @GetMapping("goods")
        public Goods findGoods(){ 
            return goodsService.findGoods();
        }
    }

nacos分布式配置controller

@RefreshScope
    @RestController
    public class ConfigController { 
        @Value("${spring.datasource.driver-class-name}")
        private String driver;
        @Value("${spring.datasource.url}")
        private String url;
        @Value("${spring.datasource.username}")
        private String username;
        @Value("${spring.datasource.password}")
        private String password;
    
        @GetMapping("config")
        public String config(){ 
            return "{driver='" + driver + '\'' +
                    ", url='" + url + '\'' +
                    ", username='" + username + '\'' +
                    ", password='" + password + '\'' +
                    '}';
        }
    }

创建订单模块  
导入依赖

配置文件：

server:
      port: 8802
    spring:
      application:
        name: order-service
      cloud:
        nacos:
          discovery:
            server-addr: 47.100.68.143:8848

主启动类

@EnableDiscoveryClient
    @SpringBootApplication
    public class OrdersServiceMain8802 { 
        public static void main(String[] args) { 
            SpringApplication.run(OrdersServiceMain8802.class,args);
        }
    }

实体类

@Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class Order { 
        private Long id;
        private String name;
        private Goods goods;
    }

@Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class Goods { 
        private Long id;
        private String name;
        private Double price;
    }

RestTemplateConfig

@Configuration
    public class RestTemplateConfig { 
    
        @LoadBalanced
        @Bean
        public RestTemplate restTemplate(){ 
            return new RestTemplate();
        }
    }

OrderController

@RestController
    @RequestMapping("consumer")
    public class OrderController { 
    
        @Autowired
        private RestTemplate restTemplate;
    
        @GetMapping("order")
        public ResponseEntity<Order> findGoods(){ 
            //通过服务id调用服务提供者
            Goods goods = restTemplate.getForObject("http://goods-service/provider/goods", Goods.class);
            Order order = new Order(100L,"xxx订单",goods);
            return ResponseEntity.ok(order);
        }
    }

启动这两个服务，访问Nacos，出现下面界面说明注册成功  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW96aHV6aHV5YW5n_size_16_color_FFFFFF_t_70 2]

访问8802看远程调用是否成功，出现下面情况则为成功  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW96aHV6aHV5YW5n_size_16_color_FFFFFF_t_70 3]  
访问8801服务，测试配置中心是否成功  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW96aHV6aHV5YW5n_size_16_color_FFFFFF_t_70 4]当我们修改nacos中的配置时，服务中的配置也会同步修改。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3hpYW96aHV6aHV5YW5n_size_16_color_FFFFFF_t_70 5]

[Dcoker_Nacos]: https://blog.csdn.net/xiaozhuzhuyang/article/details/117929993?spm=1001.2014.3001.5501
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