创建工程

SpringCloud中自定义Ribbon Client_spring


具体实现

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.itmuch.cloud</groupId>
  <artifactId>microservice-consumer-movie-ribbon-customizing</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <!-- 引入spring boot的依赖 -->
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.3.RELEASE</version>
  </parent>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <java.version>1.8</java.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>

    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-eureka</artifactId>
    </dependency>
  </dependencies>

  <!-- 引入spring cloud的依赖 -->
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        <version>Camden.SR4</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <!-- 添加spring-boot的maven插件 -->
  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>
</project>



application.yml

server:
  port: 8010
spring:
  application:
    name: microservice-consumer-movie
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8761/eureka/
  instance:
    prefer-ip-address: true


ExcludeFromComponentScan


com.itmuch.cloud.config.ExcludeFromComponentScan

package com.itmuch.cloud.config;

/**
 * 编写一个注解
 */
public @interface ExcludeFromComponentScan {
}


TestConfiguration


com.itmuch.cloud.config.TestConfiguration

package com.itmuch.cloud.config;

import com.itmuch.cloud.config.ExcludeFromComponentScan;
import com.netflix.client.config.IClientConfig;
import com.netflix.loadbalancer.IRule;
import com.netflix.loadbalancer.RandomRule;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
@ExcludeFromComponentScan
public class TestConfiguration {
    @Autowired
    IClientConfig config;

    @Bean
    public IRule ribbonRule(IClientConfig config){
        return new RandomRule();
    }
}


User

com.itmuch.cloud.study.user.entity.User

package com.itmuch.cloud.study.user.entity;

import java.math.BigDecimal;

public class User {
  private Long id;
  private String username;
  private String name;
  private Integer age;
  private BigDecimal balance;

  public Long getId() {
    return this.id;
  }

  public void setId(Long id) {
    this.id = id;
  }

  public String getUsername() {
    return this.username;
  }

  public void setUsername(String username) {
    this.username = username;
  }

  public String getName() {
    return this.name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public Integer getAge() {
    return this.age;
  }

  public void setAge(Integer age) {
    this.age = age;
  }

  public BigDecimal getBalance() {
    return this.balance;
  }

  public void setBalance(BigDecimal balance) {
    this.balance = balance;
  }
}


MovieController

com.itmuch.cloud.study.user.controller.MovieController

package com.itmuch.cloud.study.user.controller;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import com.itmuch.cloud.study.user.entity.User;

@RestController
public class MovieController {
  private static final Logger LOGGER = LoggerFactory.getLogger(MovieController.class);
  @Autowired
  private RestTemplate restTemplate;
  @Autowired
  private LoadBalancerClient loadBalancerClient;

  @GetMapping("/test")
  public String test() {
    ServiceInstance serviceInstance = this.loadBalancerClient.choose("microservice-provider-user");
    System.out.println("--------随机："+serviceInstance.getHost()+":"+serviceInstance.getPort()+":"+serviceInstance.getServiceId());

    ServiceInstance serviceInstance2 = this.loadBalancerClient.choose("microservice-provider-user2");
    System.out.println("--------轮询："+serviceInstance2.getHost()+":"+serviceInstance2.getPort()+":"+serviceInstance2.getServiceId());

    return "1";
  }


  @GetMapping("/user/{id}")
  public User findById(@PathVariable Long id) {
    return this.restTemplate.getForObject("http://microservice-provider-user/" + id, User.class);
  }

  @GetMapping("/log-user-instance")
  public void logUserInstance() {
    ServiceInstance serviceInstance = this.loadBalancerClient.choose("microservice-provider-user");
    // 打印当前选择的是哪个节点
    MovieController.LOGGER.info("{}:{}:{}", serviceInstance.getServiceId(), serviceInstance.getHost(), serviceInstance.getPort());
  }
}


ConsumerMovieApplication


com.itmuch.cloud.study.ConsumerMovieApplication

package com.itmuch.cloud.study;

import com.itmuch.cloud.config.ExcludeFromComponentScan;
import com.itmuch.cloud.config.TestConfiguration;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.netflix.ribbon.RibbonClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.FilterType;
import org.springframework.web.client.RestTemplate;

@EnableDiscoveryClient
@SpringBootApplication
@RibbonClient(name="microservice-provider-user",configuration = TestConfiguration.class)
@ComponentScan(excludeFilters={@ComponentScan.Filter(type= FilterType.ANNOTATION,value=ExcludeFromComponentScan.class)})

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

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


启动测试

启动

启动eureka,在启动四个提供示例；

SpringCloud中自定义Ribbon Client_maven_02

microservice-provider-user:8000

microservice-provider-user:8001(改端口)

microservice-provider-user2:8002（改服务名和端口）

microservice-provider-user2:8003（改服务名和端口）


查看eureka

SpringCloud中自定义Ribbon Client_spring_03


访问测试

http://localhost:8010/test (多次访问)

--------轮询：192.168.1.102:8002:microservice-provider-user2
--------随机：192.168.1.102:8000:microservice-provider-user
--------轮询：192.168.1.102:8003:microservice-provider-user2
--------随机：192.168.1.102:8001:microservice-provider-user
--------轮询：192.168.1.102:8002:microservice-provider-user2
--------随机：192.168.1.102:8000:microservice-provider-user
--------轮询：192.168.1.102:8003:microservice-provider-user2
--------随机：192.168.1.102:8000:microservice-provider-user

--------轮询：192.168.1.102:8002:microservice-provider-user2

......