環(huán)境 springboot + springcloud

Eureka-Server注冊中心服務端

pom.xml導入依賴

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
    <version>2.2.7.RELEASE</version> <!-- 一般在父工程中就配置了 -->
</dependency>

aplication.yml配置

server:
  port: 10086
spring:
  application:
    name: eurekaserver   # 服務名，需要配置
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:10086/eureka

EurekaServerApplication.java啟動類配置

@SpringBootApplication
@EnableEurekaServer  // 開啟eureka的注冊中心功能
public class EurekaServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(EurekaServerApplication.class, args);
    }
}

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Service提供者

pom.xml

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    <version>2.2.7.RELEASE</version> 	<!-- 一般在父工程中就配置了 -->
</dependency>

application.yml

spring:
  application:
    name: userservice
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:10086/eureka

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consumer消費者 (消費者也可以作為提供者身份出現(xiàn))

pom.xml

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
    <version>2.2.7.RELEASE</version> 	<!-- 一般在父工程中就配置了 -->
</dependency>

application.yml

spring:
  application:
    name: orderservice
eureka:
  client:
    service-url:
      defaultZone: http://127.0.0.1:10086/eureka

OrderApplication 配置RestTemplate的Bean加入到Spring容器中

@MapperScan("cn.xxx.order.mapper")
@SpringBootApplication
public class OrderApplication {

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

    @Bean
    @LoadBalanced # 負責均衡 和 做拉取服務
    public RestTemplate getRestTemplate() {
        return new RestTemplate();
    }
}

OrderService 利用RestTemplate調(diào)用 UserService接口

@Service
public class OrderService {

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private RestTemplate restTemplate;

    public Order queryOrderById(Long orderId) {
        Order order = orderMapper.findById(orderId);

		// restTemplate.getForObject(請求地址, 返回值類型);
        String url = "http://userservice/user/" + order.getUserId(); // userservice是提供者的spring.application.name
        User user = restTemplate.getForObject(url, User.class);
        order.setUser(user);
        
        return order;
    }
}

Ribbon負載均衡 (service配置)

方式1：重寫IRule接口的實現(xiàn)Bean

@Bean
public IRule randomRule() {
    return new RandomRule();
}

方式2：配置文件指定

application.xml

userservice: # 給某個微服務配置負載均衡規(guī)則，這里是userservice服務
  ribbon:
    NFLoadBalancerRuleClassName: com.netflix.loadbalancer.RandomRule # 負載均衡規(guī)則 
    # 當?shù)谝淮卧L問時才會拉取服務再做緩存

饑餓加載配置：容器加載完畢后就拉取服務做緩存文章來源地址http://www.zghlxwxcb.cn/news/detail-693589.html

ribbon:
  eager-load:
    enabled: true
    clients:
      - userservice		# 指定一啟動就加載的服務，可以配置多個
      -  xxxservice1

到了這里，關于Eureka 注冊中心的使用的文章就介紹完了。如果您還想了解更多內(nèi)容，請在右上角搜索TOY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關文章，希望大家以后多多支持TOY模板網(wǎng)！