柚子快報(bào)邀請碼778899分享：Eureka 注冊中心的使用

http://yzkb.51969.com/

環(huán)境 springboot + springcloud

Eureka-Server注冊中心服務(wù)端

pom.xml導(dǎo)入依賴

org.springframework.cloud

spring-cloud-starter-netflix-eureka-server

2.2.7.RELEASE

aplication.yml配置

server:

port: 10086

spring:

application:

name: eurekaserver # 服務(wù)名，需要配置

eureka:

client:

service-url:

defaultZone: http://127.0.0.1:10086/eureka

EurekaServerApplication.java啟動(dòng)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);

}

}

?

?

Service提供者

pom.xml

org.springframework.cloud

spring-cloud-starter-netflix-eureka-client

2.2.7.RELEASE

application.yml

spring:

application:

name: userservice

eureka:

client:

service-url:

defaultZone: http://127.0.0.1:10086/eureka

?

?

consumer消費(fèi)者 (消費(fèi)者也可以作為提供者身份出現(xiàn))

pom.xml

org.springframework.cloud

spring-cloud-starter-netflix-eureka-client

2.2.7.RELEASE

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(fù)責(zé)均衡 和 做拉取服務(wù)

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(fù)載均衡 (service配置)

方式1：重寫IRule接口的實(shí)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(gè)微服務(wù)配置負(fù)載均衡規(guī)則，這里是userservice服務(wù)

ribbon:

NFLoadBalancerRuleClassName: com.netflix.loadbalancer.RandomRule # 負(fù)載均衡規(guī)則

# 當(dāng)?shù)谝淮卧L問時(shí)才會(huì)拉取服務(wù)再做緩存

饑餓加載配置：容器加載完畢后就拉取服務(wù)做緩存

ribbon:

eager-load:

enabled: true

clients:

- userservice # 指定一啟動(dòng)就加載的服務(wù)，可以配置多個(gè)

- xxxservice1

柚子快報(bào)邀請碼778899分享：Eureka 注冊中心的使用

http://yzkb.51969.com/

精彩鏈接