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增加 spring cloud openfeign 入门示例

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YunaiV
2020-02-10 00:04:57 +08:00
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commit abc4a044ef
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README.md
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* [《芋道 Spring Cloud Alibaba 注册中心 Nacos 入门》](http://www.iocoder.cn/Spring-Cloud-Alibaba/Nacos-Discovery/?github) 对应 [labx-01](https://github.com/YunaiV/SpringBoot-Labs/tree/master/labx-01)
* [《芋道 Spring Cloud Netflix 负载均衡 Ribbon 入门》](http://www.iocoder.cn/Spring-Cloud-Netflix/Ribbon/?github) 对应 [labx-02](https://github.com/YunaiV/SpringBoot-Labs/tree/master/labx-02)
* 《芋道 Spring Cloud 声明式调用 OpenFeign 入门》
* [《芋道 Spring Cloud 声明式调用 OpenFeign 入门》](http://www.iocoder.cn/Spring-Cloud/OpenFeign/?github) 对应 [labx-03](https://github.com/YunaiV/SpringBoot-Labs/tree/master/labx-03)
* 《芋道 Spring Cloud Alibaba 服务调用 Dubbo 入门》
* 《芋道 Spring Cloud Alibaba 配置中心 Nacos 入门》
* 《芋道 Spring Cloud Alibaba 服务容错 Sentinel 入门》
@@ -146,7 +146,7 @@
* 《芋道 Spring Cloud Alibaba 服务调用 Dubbo 入门》
* [《芋道 Spring Cloud Netflix 负载均衡 Ribbon 入门》](http://www.iocoder.cn/Spring-Cloud-Netflix/Ribbon/?github) 对应 [labx-02](https://github.com/YunaiV/SpringBoot-Labs/tree/master/labx-02)
* 《芋道 Spring Cloud 声明式调用 OpenFeign 入门》
* [《芋道 Spring Cloud 声明式调用 OpenFeign 入门》](http://www.iocoder.cn/Spring-Cloud/OpenFeign/?github) 对应 [labx-03](https://github.com/YunaiV/SpringBoot-Labs/tree/master/labx-03)
## 服务容错

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labx-03/labx-03-sc-feign-demo01-consumer/pom.xml Normal file
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<?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">
<parent>
<artifactId>labx-01</artifactId>
<groupId>cn.iocoder.springboot.labs</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>labx-03-sc-feign-demo01-consumer</artifactId>
<properties>
<spring.boot.version>2.2.4.RELEASE</spring.boot.version>
<spring.cloud.version>Hoxton.SR1</spring.cloud.version>
<spring.cloud.alibaba.version>2.2.0.RELEASE</spring.cloud.alibaba.version>
</properties>
<!--
引入 Spring Boot、Spring Cloud、Spring Cloud Alibaba 三者 BOM 文件，进行依赖版本的管理，防止不兼容。
在 https://dwz.cn/mcLIfNKt 文章中，Spring Cloud Alibaba 开发团队推荐了三者的依赖关系
-->
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>${spring.boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring.cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>${spring.cloud.alibaba.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<!-- 引入 SpringMVC 相关依赖，并实现对其的自动配置 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 引入 Spring Cloud Alibaba Nacos Discovery 相关依赖，将 Nacos 作为注册中心，并实现对其的自动配置 -->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<!-- 引入 Spring Cloud OpenFeign 相关依赖，使用 OpenFeign 提供声明式调用，并实现对其的自动配置 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
</dependencies>
</project>

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labx-03/labx-03-sc-feign-demo01-consumer/src/main/java/cn/iocoder/springcloud/labx03/feigndemo/consumer/DemoConsumerApplication.java Normal file
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package cn.iocoder.springcloud.labx03.feigndemo.consumer;
import cn.iocoder.springcloud.labx03.feigndemo.consumer.feign.DemoProviderFeignClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@SpringBootApplication
public class DemoConsumerApplication {
public static void main(String[] args) {
SpringApplication.run(DemoConsumerApplication.class, args);
}
@Configuration
@EnableFeignClients
public class OpenFeignConfiguration {
}
@RestController
static class TestController {
@Autowired
private DemoProviderFeignClient demoProviderFeignClient;
@GetMapping("/hello02")
public String hello02(String name) {
// TODO 直接使用 RestTemplate 调用服务 `demo-provider`
String response = demoProviderFeignClient.echo(name);
// 返回结果
return "consumer:" + response;
}
}
}

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labx-03/labx-03-sc-feign-demo01-consumer/src/main/java/cn/iocoder/springcloud/labx03/feigndemo/consumer/feign/DemoProviderFeignClient.java Normal file
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package cn.iocoder.springcloud.labx03.feigndemo.consumer.feign;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
@FeignClient(name = "demo-provider")
public interface DemoProviderFeignClient {
@GetMapping("/echo")
String echo(@RequestParam("name") String name);
}

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labx-03/labx-03-sc-feign-demo01-consumer/src/main/resources/application.yaml Normal file
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spring:
application:
name: demo-consumer # Spring 应用名
cloud:
nacos:
# Nacos 作为注册中心的配置项，对应 NacosDiscoveryProperties 配置类
discovery:
server-addr: 127.0.0.1:8848 # Nacos 服务器地址
server:
port: 28080 # 服务器端口。默认为 8080

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labx-03/labx-03-sc-feign-demo01-provider/pom.xml Normal file
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<?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">
<parent>
<artifactId>labx-01</artifactId>
<groupId>cn.iocoder.springboot.labs</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>labx-03-sc-feign-demo01-provider</artifactId>
<properties>
<spring.boot.version>2.2.4.RELEASE</spring.boot.version>
<spring.cloud.version>Hoxton.SR1</spring.cloud.version>
<spring.cloud.alibaba.version>2.2.0.RELEASE</spring.cloud.alibaba.version>
</properties>
<!--
引入 Spring Boot、Spring Cloud、Spring Cloud Alibaba 三者 BOM 文件，进行依赖版本的管理，防止不兼容。
在 https://dwz.cn/mcLIfNKt 文章中，Spring Cloud Alibaba 开发团队推荐了三者的依赖关系
-->
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>${spring.boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring.cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>${spring.cloud.alibaba.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<!-- 引入 SpringMVC 相关依赖，并实现对其的自动配置 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 引入 Spring Cloud Alibaba Nacos Discovery 相关依赖，将 Nacos 作为注册中心，并实现对其的自动配置 -->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
</dependencies>
</project>

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labx-03/labx-03-sc-feign-demo01-provider/src/main/java/cn/iocoder/springcloud/labx03/feigndemo/provider/DemoProviderApplication.java Normal file
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package cn.iocoder.springcloud.labx03.feigndemo.provider;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@SpringBootApplication
public class DemoProviderApplication {
public static void main(String[] args) {
SpringApplication.run(DemoProviderApplication.class, args);
}
@RestController
static class TestController {
private Logger logger = LoggerFactory.getLogger(TestController.class);
@Value("${server.port}")
private Integer serverPort;
@GetMapping("/echo")
public String echo(String name) throws InterruptedException {
// 模拟执行 100ms 时长。方便后续我们测试请求超时
// Thread.sleep(100L);
// 记录被调用的日志
logger.info("[echo][被调用啦 name({})]", name);
return serverPort + "-provider:" + name;
}
}
}

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labx-03/labx-03-sc-feign-demo01-provider/src/main/resources/application.yaml Normal file
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spring:
application:
name: demo-provider # Spring 应用名
cloud:
nacos:
# Nacos 作为注册中心的配置项，对应 NacosDiscoveryProperties 配置类
discovery:
server-addr: 127.0.0.1:8848 # Nacos 服务器地址
server:
port: ${random.int[10000,19999]} # 服务器端口。默认为 8080
# port: 18080 # 服务器端口。默认为 8080

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labx-03/pom.xml Normal file
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<?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">
<parent>
<artifactId>labs-parent</artifactId>
<groupId>cn.iocoder.springboot.labs</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>labx-03</artifactId>
<modules>
<module>labx-03-sc-feign-demo01-provider</module>
<module>labx-03-sc-feign-demo01-consumer</module>
</modules>
</project>

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pom.xml
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<module>lab-49</module>
<module>labx-01</module>
<module>labx-02</module>
<module>labx-03</module>
</modules>
</project>