ribbon学习

spring cloud 中的负载均衡有ribbon和feign

引入ribbon依赖

        <!--ribbon相关-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-ribbon</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-config</artifactId>
        </dependency>

在客户端加入loadblance

     @Bean
    @LoadBalanced  //ribbon负载均衡,
    public RestTemplate getRestaTemplate(){
        return new RestTemplate();
    }

ribbon的负载均衡算法有七种，默认轮询，要更换：

   @Bean
    @LoadBalanced  //ribbon负载均衡,
    public RestTemplate getRestaTemplate(){
        return new RestTemplate();
    }
 
    //更换算法
    @Bean
    public IRule defRule(){
        return new RandomRule();
    }

自定义Rule，不能建在与主类及子包下面：

@SpringBootApplication
@EnableEurekaClient
@RibbonClient(name = "MICROSERVICECLOUD",configuration = "自定义的rule")
public class Consumer80 {
    public static void main(String[] args) {
        SpringApplication.run(Consumer80.class,args);
    }
}