SpringCloud微服务框架Fegin负载均衡
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2021-04-03 20:58
Springcloud框架的Ribbon负载均衡
添加相关的pom依赖
<dependencies>
<dependency>
<groupId>com.yang</groupId>
<artifactId>microservicecloud-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 修改后立即生效,热部署 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>springloaded</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
<!-- 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-config</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-feign</artifactId>
</dependency>
</dependencies>
创建配置类
package com.yang.springcloud.config;
import com.netflix.loadbalancer.IRule;
import com.netflix.loadbalancer.RetryRule;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
@Configuration
public class ConfigBean
{
@Bean
@LoadBalanced
public RestTemplate getRestTemplate()
{
return new RestTemplate();
}
@Bean
public IRule myRule()
{
//return new RoundRobinRule();
//return new RandomRule();//达到的目的,用我们重新选择的随机算法替代默认的轮询。
return new RetryRule();
}
}
创建Controller层
package com.yang.springcloud.controller;
import java.util.List;
import com.yang.entity.Dept;
import com.yang.service.DeptClientService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class DeptController_Feign
{
@Autowired
private DeptClientService service = null;
@RequestMapping(value = "/consumer/dept/get/{id}")
public Dept get(@PathVariable("id") Long id)
{
return this.service.get(id);
}
@RequestMapping(value = "/consumer/dept/list")
public List<Dept> list()
{
return this.service.list();
}
@RequestMapping(value = "/consumer/dept/add")
public Object add(Dept dept)
{
return this.service.add(dept);
}
}
创建启动类
package com.yang.springcloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.netflix.feign.EnableFeignClients;
import org.springframework.context.annotation.ComponentScan;
@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients(basePackages= {"com.yang"})
@ComponentScan("com.yang")
public class DeptConsumer80_Feign_App {
public static void main(String[] args)
{
SpringApplication.run(DeptConsumer80_Feign_App.class, args);
}
}
创建application.yml配置类
server:
port: 8080
eureka:
client:
register-with-eureka: false
service-url:
defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
在microservicecloud-api 定义service接口
package com.yang.service;
import java.util.List;
import com.yang.entity.Dept;
import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@FeignClient(value = "MICROSERVICECLOUD-DEPT")
public interface DeptClientService
{
@RequestMapping(value = "/dept/get/{id}",method = RequestMethod.GET)
public Dept get(@PathVariable("id") long id);
@RequestMapping(value = "/dept/list",method = RequestMethod.GET)
public List<Dept> list();
@RequestMapping(value = "/dept/add",method = RequestMethod.POST)
public boolean add(Dept dept);
}
完
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