服務(wù)消費(fèi)者的創(chuàng)建與服務(wù)提供者大同小異眼坏,這里采用最原始的一種方式,即顯示的使用 LoadBalanceClient 和 RestTemplate 結(jié)合的方式來訪問
POM
創(chuàng)建一個工程名為 hello-spring-cloud-alibaba-nacos-consumer
的服務(wù)消費(fèi)者項(xiàng)目地粪,pom.xml 配置如下:
<?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>
<parent>
<groupId>com.wj</groupId>
<artifactId>hello-spring-cloud-alibaba-dependencies</artifactId>
<version>1.0.0-SNAPSHOT</version>
<relativePath>../hello-spring-cloud-alibaba-dependencies/pom.xml</relativePath>
</parent>
<artifactId>hello-spring-cloud-alibaba-consumer</artifactId>
<packaging>jar</packaging>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!-- Spring Boot Begin -->
<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.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- Spring Boot End -->
<!-- Spring Cloud Begin -->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
</dependency>
<!-- Spring Cloud End -->
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<mainClass>com.wj.hello.spring.cloud.alibaba.nacos.consumer.NacosConsumerApplication</mainClass>
</configuration>
</plugin>
</plugins>
</build>
</project>
Application
package com.wj.hello.spring.cloud.alibaba.nacos.consumer.NacosConsumerApplication;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@SpringBootApplication
@EnableDiscoveryClient
public class NacosConsumerApplication {
public static void main(String[] args) {
SpringApplication.run(NacosConsumerApplication.class, args);
}
}
Configuration
創(chuàng)建一個名為 NacosConsumerConfiguration
的 Java 配置類取募,主要作用是為了注入 RestTemplate
package com.wj.hello.spring.cloud.alibaba.nacos.consumer.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;
@Configuration
public class NacosConsumerConfiguration {
@Bean
public RestTemplate restTemplate() {
return new RestTemplate();
}
}
Controller
創(chuàng)建一個名為 NacosConsumerController
測試用的 Controller
package com.wj.hello.spring.cloud.alibaba.nacos.consumer.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
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.RestController;
import org.springframework.web.client.RestTemplate;
@RestController
public class NacosConsumerController {
@Autowired
private LoadBalancerClient loadBalancerClient;
@Autowired
private RestTemplate restTemplate;
@Value("${spring.application.name}")
private String appName;
@GetMapping(value = "/echo/app/name")
public String echo() {
//使用 LoadBalanceClient 和 RestTemplate 結(jié)合的方式來訪問
ServiceInstance serviceInstance = loadBalancerClient.choose("nacos-provider");
String url = String.format("http://%s:%s/echo/%s", serviceInstance.getHost(), serviceInstance.getPort(), appName);
return restTemplate.getForObject(url, String.class);
}
}
application.yml
spring:
application:
name: nacos-consumer
cloud:
nacos:
discovery:
server-addr: 127.0.0.1:8848
server:
port: 9091
management:
endpoints:
web:
exposure:
include: "*"
啟動工程
通過瀏覽器訪問 http://localhost:8848/nacos
,即 Nacos Server 網(wǎng)址
你會發(fā)現(xiàn)多了一個名為 nacos-consumer
的服務(wù)
這時打開 http://localhost:9091/echo/app/name
蟆技,你會在瀏覽器上看到:
Hello Nacos Discovery nacos-consumer
服務(wù)的端點(diǎn)檢查
通過瀏覽器訪問 http://localhost:9091/actuator/nacos-discovery
你會在瀏覽器上看到: