3.springcloud微服务架构搭建 之 《springboot自动装配ribbon》

1.springcloud微服务架构搭建 之 《springboot自动装配Redis》

2.springcloud微服务架构搭建 之 《springboot集成nacos注册中心》

 

ribbon工作原理自己网上百度，说的都很详细

目录

1.项目引入openfeign和ribbon配置

2.新建lilock-ribbon-spring-boot-starter

3.增加restTemplate配置类

4.配置Ribbon配置类

5.配置ribbon自动装配spring.factories

6.新建一个cms业务服务，开始测试

7.配置ribbon参数

8.新建测试类进行测试

 9.在user服务调用

---

1.项目引入openfeign和ribbon配置

openfeign集成了ribbon，需要单独给ribbon配置参数信息

    org.springframework.cloud
    spring-cloud-starter-openfeign
    ${spring.cloud.version}


    org.springframework.cloud
    spring-cloud-starter-netflix-ribbon
    ${spring.cloud.version}




    org.apache.httpcomponents
    httpclient
    ${httpclient.version}

2.新建lilock-ribbon-spring-boot-starter

引入ribbon坐标

    
        lilock-commons
        lilock.cn
        1.0-SNAPSHOT
    
    4.0.0
    1.0-SNAPSHOT
    lilock-feign-spring-boot-starter

    
        
            org.springframework.boot
            spring-boot-autoconfigure
        
        
            org.springframework.boot
            spring-boot-configuration-processor
        
        
            org.springframework.cloud
            spring-cloud-starter-openfeign
        
        
            org.springframework.cloud
            spring-cloud-starter-netflix-ribbon
        

        
            org.apache.httpcomponents
            httpclient
        
        
            org.projectlombok
            lombok
        
    

3.增加restTemplate配置类

package lilock.cn.common.ribbon.properties;

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;

@ConfigurationProperties(prefix = "lilock.rest-template")
@Data
public class RestTemplateProperties {

    /**
     * 最大链接数
     */
    private int maxTotal = 300;
    /**
     * 同路由最大并发数
     */
    private int maxPerRoute = 200;
    /**
     * 读取超时时间 ms
     */
    private int readTimeout = 30000;
    /**
     * 链接超时时间 ms
     */
    private int connectTimeout = 15000;

    /***
     * 最大重试次数
     */
    private int maxAutoRetries = 0;

    /**
     * 是否支持重试
     */
    private boolean enableRetry = false;
}

4.配置Ribbon配置类

package lilock.cn.common.ribbon.config;

import com.netflix.loadbalancer.IRule;
import com.netflix.loadbalancer.RoundRobinRule;
import lilock.cn.common.ribbon.properties.RestTemplateProperties;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Primary;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;

@EnableConfigurationProperties
public class RibbonConfig {
    @Autowired
    private RestTemplateProperties restTemplateProperties;
    @Bean
    @LoadBalanced
    public RestTemplate restTemplate(ClientHttpRequestFactory factory){
        RestTemplate restTemplate = new RestTemplate();
        //设置resttemplate http工厂
        restTemplate.setRequestFactory(factory);
        return restTemplate;
    }


    /**
     * 配置默认负载均衡策略-轮训
     * @return
     */
    @Bean
    @Primary
    public IRule ribbonRule(){
        IRule rule = new RoundRobinRule();
        return rule;
    }


    @Bean
    @Primary
    public ClientHttpRequestFactory httpRequestFactory(HttpClient httpclient){
        //设置httpclient
        return new HttpComponentsClientHttpRequestFactory(httpclient);
    }

    /**
     * 配置httpclient 参数
     * @return
     */
    @Bean
    public HttpClient httpClient(){
        Registry registry = RegistryBuilder.create()
                .register("http", PlainConnectionSocketFactory.getSocketFactory())
                .register("https", SSLConnectionSocketFactory.getSocketFactory())
                .build();
        PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager(registry);
        // 最大链接数
        connectionManager.setMaxTotal(restTemplateProperties.getMaxTotal());
        // 同路由并发数20
        connectionManager.setDefaultMaxPerRoute(restTemplateProperties.getMaxPerRoute());

        RequestConfig requestConfig = RequestConfig.custom()
                // 读超时
                .setSocketTimeout(restTemplateProperties.getReadTimeout())
                // 链接超时
                .setConnectTimeout(restTemplateProperties.getConnectTimeout())
                // 链接不够用的等待时间
                .setConnectionRequestTimeout(restTemplateProperties.getReadTimeout())
                .build();
        return HttpClients.custom()
                .setDefaultRequestConfig(requestConfig)
                .setConnectionManager(connectionManager)
                .setRetryHandler(new DefaultHttpRequestRetryHandler(restTemplateProperties.getMaxAutoRetries(),restTemplateProperties.isEnableRetry()))
                .build();
    }
}

5.配置ribbon自动装配spring.factories

org.springframework.boot.autoconfigure.EnableAutoConfiguration = \
lilock.cn.common.ribbon.properties.RestTemplateProperties,\
lilock.cn.common.ribbon.config.RibbonConfig

6.新建一个cms业务服务，开始测试

    
        lilock-modules
        lilock.cn
        1.0-SNAPSHOT
    
    4.0.0
    1.0-SNAPSHOT
    lilock-service-cms

    
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            org.springframework.boot
            spring-boot-starter-test
        
        
            lilock.cn
            lilock-feign-spring-boot-starter
            ${project.version}
        
        
            io.springfox
            springfox-swagger2
        
        
            io.springfox
            springfox-swagger-ui
        
        
            com.alibaba.cloud
            spring-cloud-starter-alibaba-nacos-discovery
        
    
    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    

7.配置ribbon参数

server.port 可以配置不同的端口，cms服务启动2次模拟负载，我这里端口分别配置的是8990,8991

lilock:
  rest-template:
    max-total: 300 #最大连接数
    max-per-route: 200 #路由最大数
    max-auto-retries: 0 #最大重试次数
    enable-retry: false #是否开启重试
    connect-timeout: 15000 #链接超时时间
    read-timeout: 30000 #请求超时时间
spring:
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
        register-enabled: true
        namespace: dev
  application:
    name: lilock-service-cms
server:
  port: 8990

8.新建测试类进行测试

package lilock.cn.cms.controller;

import io.swagger.annotations.Api;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/api/cms")
@Api(value = "cms接口管理",tags = {"CMS接口管理"})
@Slf4j
public class CmsController {

    @Value("${server.port}")
    private Integer port;
    @Value("${spring.application.name}")
    private String service;

    @GetMapping("/hello")
    public String getHello(){
        return "["+ service +"]点前服务端口号是:["+ port +"]返回内容 HELLO" ;
    }
}

 9.在user服务调用

package lilock.cn.user.controller;


import com.alibaba.fastjson.JSONObject;
import io.swagger.annotations.Api;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
@RequestMapping(path = "/user")
@Api(value = "系统用户",tags = {"系统用户"})
@Slf4j
public class UserController {
    @Autowired
    private RestTemplate restTemplate;

    @GetMapping("/testTemplate")
    public String testTemplate(){
        String value = restTemplate.getForObject("http://lilock-service-cms/api/cms/hello",String.class);
        log.info("获取当前请求结果:{}",value);
        return value;
    }
}

可以看到8990,8991 2个端口对应的服务轮训返回，说明配置的轮训策略生效