Netflix Feign Netflix ˾һʵָؾͷõĿԴSpring Cloud Netflix еԴ EurekaRibbon Լ Hystrix ȣһϽ Spring Cloud Netflix ģУϺȫΪ Spring Cloud Netflix Feign

Feign Ribbon ˼ɣ Ribbon άһݿ÷嵥ͨ Ribbon ʵ˿ͻ˵ĸؾ⡣

Feign һʽ RestTemplate Ļ˽һķװͨ FeignֻҪһӿڲͨעм򵥵ã Dao ӿ Mapper עһʵֶ HTTP ӿڵİ󶨡

ͨ FeignǿñطһԶ̷񣬶ȫоڽԶ̵á

Feign ֶ֧ע⣬ Feign ԴעԼ JAX-RS עȣź Feign ֧ Spring MVC ע⣬ɻ Spring û㡣

2019 Netflix ˾ Feign ʽͣά״̬ Spring ٷƳһΪ OpenFeign Ϊ Feign

OpenFeign

OpenFeign ȫ Spring Cloud OpenFeign Spring ٷƳһʽ븺ؾĳ־Ϊͣά״̬ Feign

OpenFeign Spring Cloud Feign Ķηװ Feign йܣ Feign Ļ˶ Spring MVC ע֧֣ @RequestMapping@GetMapping @PostMapping ȡ

OpenFeign ע

ʹ OpenFegin Զ̷ʱע±

ע	˵
@FeignClient	ע֪ͨ OpenFeign @RequestMapping עµĽӿڽн̬ͨķʽʵ࣬ʵָؾͷá
@EnableFeignClients	עڿ OpenFeign ܣ Spring Cloud ӦʱOpenFeign ɨ @FeignClient עĽӿڣɴעᵽ Spring С
@RequestMapping	Spring MVC ע⣬ Spring MVC ʹøעӳָͨControllerԴЩ URL ൱ Servlet web.xml á
@GetMapping	Spring MVC ע⣬ӳ GET һע⣬൱ @RequestMapping(method = RequestMethod.GET)
@PostMapping	Spring MVC ע⣬ӳ POST һע⣬൱ @RequestMapping(method = RequestMethod.POST)

Spring Cloud Finchley ϰ汾һʹ OpenFeign Ϊ OpenFeign 2019 Feign ͣάƳģ˴ 2019 꼰ԺĿʹõĶ OpenFeign 2018 ǰĿһʹ Feign

Feign VS OpenFeign

ǾԱ Feign OpenFeign ͬ

ͬ

Feign OpenFegin ͬ㣺

Feign OpenFeign Spring Cloud µԶ̵ú͸ؾ
Feign OpenFeign һʵַԶ̵ú͸ؾ⡣
Feign OpenFeign Ribbon ˼ɣ Ribbon ά˿÷嵥ͨ Ribbon ʵ˿ͻ˵ĸؾ⡣
Feign OpenFeign ڷߣͻˣ󶨽ӿڲͨעķʽãʵԶ̷ĵá

ͬ

Feign OpenFeign ²ͬ

Feign OpenFeign ͬFeign Ϊ spring-cloud-starter-feign OpenFeign Ϊ spring-cloud-starter-openfeign
Feign OpenFeign ֵ֧עⲻͬFeign ֧ Feign ע JAX-RS ע⣬֧ Spring MVC ע⣻OpenFeign ֧ Feign ע JAX-RS ע⣬֧ Spring MVC ע⡣

OpenFeign ʵԶ̷

Ǿͨһʵʾͨ OpenFeign ʵԶ̷õġ

1. spring-cloud-demo2 ´һΪ micro-service-cloud-consumer-dept-feign Spring Boot ģ飬 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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <artifactId>spring-cloud-demo2</artifactId>
        <groupId>net.biancheng.c</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <groupId>net.biancheng.c</groupId>
    <artifactId>micro-service-cloud-consumer-dept-feign</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>micro-service-cloud-consumer-dept-feign</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>net.biancheng.c</groupId>
            <artifactId>micro-service-cloud-api</artifactId>
            <version>${project.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--Eureka Client -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <!-- Ribbon -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
        </dependency>
        <!-- OpenFeign -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

2. micro-service-cloud-consumer-dept-feign µ· /resources Ŀ¼£һ application.yml¡


server:
  port: 80
eureka:
  client:
    register-with-eureka: false #߿Բעע
    service-url:
      defaultZone: http://eureka7001.com:7001/eureka/,http://eureka7002.com:7002/eureka/,http://eureka7003.com:7003/eureka/
    fetch-registry: true  #߿ͻҪȥ

3. net.biancheng.c.service ´һΪ DeptFeignService Ľӿڣڸýӿʹ @FeignClient עʵֶԷӿڵİ󶨣¡

package net.biancheng.c.service;

import net.biancheng.c.entity.Dept;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import java.util.List;

//Ϊڵһ
@Component
// ṩṩķƣ application.name
@FeignClient(value = "MICROSERVICECLOUDPROVIDERDEPT")
public interface DeptFeignService {
    //Ӧṩߣ800180028003Controller жķ
    @RequestMapping(value = "/dept/get/{id}", method = RequestMethod.GET)
    public Dept get(@PathVariable("id") int id);

    @RequestMapping(value = "/dept/list", method = RequestMethod.GET)
    public List<Dept> list();
}

ڱд󶨽ӿʱҪע 2 㣺

@FeignClient עУvalue ԵȡֵΪṩߵķṩļapplication.yml spring.application.name ȡֵ
ӿжÿṩߣ micro-service-cloud-provider-dept-8001 ȣ Controller ķ񷽷Ӧ

4. net.biancheng.c.controller £һΪ DeptController_Consumer Controller ࣬¡


package net.biancheng.c.controller;

import net.biancheng.c.entity.Dept;
import net.biancheng.c.service.DeptFeignService;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import java.util.List;

@RestController
public class DeptController_Consumer {
    
    @Resource
    private DeptFeignService deptFeignService;

    @RequestMapping(value = "/consumer/dept/get/{id}")
    public Dept get(@PathVariable("id") Integer id) {
        return deptFeignService.get(id);
    }

    @RequestMapping(value = "/consumer/dept/list")
    public List<Dept> list() {
        return deptFeignService.list();
    }
}

5. @EnableFeignClients ע⿪ OpenFeign ܣ¡


package net.biancheng.c;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.openfeign.EnableFeignClients;

@SpringBootApplication
@EnableFeignClients // OpenFeign 
public class MicroServiceCloudConsumerDeptFeignApplication {

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

Spring Cloud ӦʱOpenFeign ɨ @FeignClient עĽӿɴע˵ Spring С

6. עļȺṩԼ micro-service-cloud-consumer-dept-feignɺʹʡhttp://eureka7001.com/consumer/dept/listͼ

ͼ1OpenFeign ʵԶ̷

7. ηʡhttp://eureka7001.com/consumer/dept/listͼ

ͼ2OpenFeign ؾ

ͼ 2 Կ OpenFeign RibbonҲʵ˿ͻ˵ĸؾ⣬ĬϸؾΪѯԡ

OpenFeign ʱ

OpenFeign ͻ˵ĬϳʱʱΪ 1 ӣ˴ʱ䳬 1 ͻᱨΪ˱Ҫ OpenFeign ͻ˵ĳʱʱпơ

Ǿͨһʵʾ OpenFeign νгʱƵġ

1. еķṩߣˣ DeptController һӦʱΪ 5 ķ񣬴¡


//ʱ,÷ӦʱΪ 5 
@RequestMapping(value = "/dept/feign/timeout")
public String DeptFeignTimeout() {
    //ͣ 5 
    try {
        TimeUnit.SECONDS.sleep(5);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    return serverPort;
}

2. micro-service-cloud-consumer-dept-feign DeptFeignService ӿ´룬󶨷˸ոӵĳʱ


@RequestMapping(value = "/dept/feign/timeout")
public String DeptFeignTimeout();

3. micro-service-cloud-consumer-dept-feign DeptController_Consumer ´롣


@RequestMapping(value = "/consumer/dept/feign/timeout")
public String DeptFeignTimeout() {
    // openFeign-ribbon ͻһĬϵȴһӣʱͻᱨ
    return deptFeignService.DeptFeignTimeout();
}

4. зṩߣʹηʡhttp://eureka7001.com:8001/dept/feign/timeouthttp://eureka7001.com:8002/dept/feign/timeout͡http://eureka7001.com:8003/dept/feign/timeoutȷзṩṩĳʱʹãͼ

ͼ3ṩߵĳʱ

5. micro-service-cloud-consumer-dept-feignʹʡhttp://eureka7001.com/consumer/dept/feign/timeoutͼ

ͼ4OpenFeign ʱ

6. micro-service-cloud-consumer-dept-feign application.yml ãʱʱΪ 6 롣



ribbon:
  ReadTimeout: 6000 #õʱ䣬״£õʱ
  ConnectionTimeout: 6000 #Ӻ󣬷ȡԴʱ

ע OpenFeign Ribbon Լؾڵײ㶼 Ribbon ʵֵģ OpenFeign ʱҲͨ Ribbon ʵֵġ

7. ٴ micro-service-cloud-consumer-dept-feignʹʡhttp://eureka7001.com/consumer/dept/feign/timeoutͼ

ͼ5OpenFeign ʱ

OpenFeign ־ǿ

OpenFeign ṩ־ӡܣǿͨõ־˽ϸڡ

Feign Ϊÿһ FeignClient ṩһ feign.Logger ʵͨԶ OpenFeign 󶨽ӿڵĵмء

OpenFeign ־ӡܵĿʽȽϼ򵥣Ǿͨһʵʾ

1. micro-service-cloud-consumer-dept-feign application.yml ݡ



logging:
  level:
    #feign ־ʲôļظýӿ
    net.biancheng.c.service.DeptFeignService: debug

˵£

net.biancheng.c.service.DeptFeignService ǿ @FeignClient עĽӿڣ󶨽ӿڣҲֻò·ʾظ·µз󶨽ӿ
debugʾýӿڵ־

õĺǣOpenFeign debug net.biancheng.c.service.DeptFeignService ӿڡ

net.biancheng.c. config ´һΪ ConfigBean ࣬¡


package net.biancheng.c.config;
import feign.Logger;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class ConfigBean {
    /**
     * OpenFeign ־ǿ
     *  OpenFeign ¼Щ
     */
    @Bean
    Logger.Level feginLoggerLevel() {
        return Logger.Level.FULL;
    }
}

õͨõ Logger.Level OpenFeign ¼Щ־ݡ

Logger.Level ľ弶£

NONE¼κϢ
BASIC¼󷽷URL ԼӦ״ִ̬ʱ䡣
HEADERS˼¼ BASIC Ϣ⣬¼ӦͷϢ
FULL¼ӦϸͷϢ塢Ԫݵȵȡ

3. micro-service-cloud-consumer-dept-feignʹʡhttp://eureka7001.com/consumer/dept/list̨¡

2021-10-12 14:33:07.408 DEBUG 13388 --- [p-nio-80-exec-2] n.biancheng.c.service.DeptFeignService   : [DeptFeignService#list] ---> GET http://MICROSERVICECLOUDPROVIDERDEPT/dept/list HTTP/1.1
2021-10-12 14:33:07.408 DEBUG 13388 --- [p-nio-80-exec-2] n.biancheng.c.service.DeptFeignService   : [DeptFeignService#list] ---> END HTTP (0-byte body)
2021-10-12 14:33:07.983 DEBUG 13388 --- [p-nio-80-exec-2] n.biancheng.c.service.DeptFeignService   : [DeptFeignService#list] <--- HTTP/1.1 200 (574ms)
2021-10-12 14:33:07.983 DEBUG 13388 --- [p-nio-80-exec-2] n.biancheng.c.service.DeptFeignService   : [DeptFeignService#list] connection: keep-alive
2021-10-12 14:33:07.983 DEBUG 13388 --- [p-nio-80-exec-2] n.biancheng.c.service.DeptFeignService   : [DeptFeignService#list] content-type: application/json
2021-10-12 14:33:07.983 DEBUG 13388 --- [p-nio-80-exec-2] n.biancheng.c.service.DeptFeignService   : [DeptFeignService#list] date: Tue, 12 Oct 2021 06:33:07 GMT
2021-10-12 14:33:07.983 DEBUG 13388 --- [p-nio-80-exec-2] n.biancheng.c.service.DeptFeignService   : [DeptFeignService#list] keep-alive: timeout=60
2021-10-12 14:33:07.983 DEBUG 13388 --- [p-nio-80-exec-2] n.biancheng.c.service.DeptFeignService   : [DeptFeignService#list] transfer-encoding: chunked
2021-10-12 14:33:07.983 DEBUG 13388 --- [p-nio-80-exec-2] n.biancheng.c.service.DeptFeignService   : [DeptFeignService#list]
2021-10-12 14:33:07.991 DEBUG 13388 --- [p-nio-80-exec-2] n.biancheng.c.service.DeptFeignService   : [DeptFeignService#list] [{"deptNo":1,"deptName":"","dbSource":"bianchengbang_jdbc"},{"deptNo":2,"deptName":"²","dbSource":"bianchengbang_jdbc"},{"deptNo":3,"deptName":"","dbSource":"bianchengbang_jdbc"},{"deptNo":4,"deptName":"г","dbSource":"bianchengbang_jdbc"},{"deptNo":5,"deptName":"ά","dbSource":"bianchengbang_jdbc"}]
2021-10-12 14:33:07.991 DEBUG 13388 --- [p-nio-80-exec-2] n.biancheng.c.service.DeptFeignService   : [DeptFeignService#list] <--- END HTTP (341-byte body)```

ο

https://lijunyi.xyz/docs/SpringCloud/SpringCloud.html#_2-2-x-%E5%88%86%E6%94%AF https://mp.weixin.qq.com/s/2jeovmj77O9Ux96v3A0NtA https://juejin.cn/post/6931922457741770760 https://github.com/D2C-Cai/herring http://c.biancheng.net/springcloud https://github.com/macrozheng/springcloud-learning

SpringCloudOpenFeign