Nacos 负载均衡

柔光的暖阳◎ 2022-11-01 05:44 121阅读 0赞

# Nacos 负载均衡 #

# 1. RestTemplate 方式 #

## 配置类 ##

package com.cloud.demo.config;
    
    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;
    
    /**
     * 应用程序配置
     *
     * @author wangql
     * @date 2021/02/24
     */
    @Configuration
    public class ApplicationConfig {
        
    
        @Bean
        @LoadBalanced
        public RestTemplate getRestTemplate() {
        
            return new RestTemplate();
        }
    }

## 访问方式 ##

package com.cloud.demo.controller;
    
    import com.alibaba.csp.sentinel.annotation.SentinelResource;
    import com.alibaba.fastjson.JSONObject;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.client.RestTemplate;
    
    import javax.servlet.http.HttpServletResponse;
    import java.util.ArrayList;
    import java.util.HashMap;
    import java.util.List;
    
    /**
     * 指数控制器
     *
     * @author wangql
     * @date 2021/02/22
     */
    @RestController
    @RequestMapping("/consumer")
    public class ConsumerController {
        
    
        @Autowired
        private RestTemplate restTemplate;
    
        @GetMapping("/get")
        @SentinelResource("flow")
        public String get() {
        
            return restTemplate.getForObject("http://api-provider/provider/get", String.class);
        }
    }

# 2. Feign 方式 #

## 引入 Feign 包 ##

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

## 访问方式 ##

### service ###

package com.cloud.demo.servicer;
    
    import org.springframework.cloud.openfeign.FeignClient;
    import org.springframework.web.bind.annotation.GetMapping;
    
    /**
     * 提供者服务
     *
     * @author wangql
     * @date 2021/02/24
     */
    @FeignClient("api-provider")
    public interface ProviderService {
        
        
        @GetMapping("/provider/get")
        String get();
    }

### controller ###

@RestController
    @RequestMapping("/consumer")
    public class ConsumerController {
        
    
        @Autowired
        private ProviderService providerService;
    
        @GetMapping("/feign/test")
        public String get() {
        
            return providerService.get();
        }
    }