Fiegn 声明式接口调用

五：Fiegn 声明式接口调用

什么是Fiegn

Netfix，Fiegn 是一个提供模板式的Web Service客户端，使用Fiegn 可以简化Web Service 客户端的编写，开发者可以通过简单的接口和注解来调用HTTP API

Spring Cloud Fiegn ：可插拔、基于注解、负载均衡、服务器熔断

只需要创建接口，同时在接口上添加关注注解即可

Fiegn 和Ribbion的区别：

Ribbion是一个HTTP客户端工具，Fiegn 是基于Ribbion，更加灵动
支持Fiegn 注解，spring mvc 注解
Fiegn 基于Ribbion实现
Fiegn 集成了Hystrix

1.创建模块，配置环境

<?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>springCloud01</artifactId>

        <groupId>org.example</groupId>

        <version>1.0-SNAPSHOT</version>

    </parent>

    <modelVersion>4.0.0</modelVersion>

    <artifactId>feign</artifactId>

    <dependencies>

        <dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.cloud</groupId>

            <artifactId>spring-cloud-starter-openfeign</artifactId>

        </dependency>

    </dependencies>

</project>

2.配置文件

server:

  port: 8050

spring:

  application:

    name: fegin

eureka:

  client:

    service-url:

      defaultZone: http://localhost:8761/eureka/

  instance:

    prefer-ip-address: true

3.启动类

package com.southwind;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.cloud.openfeign.EnableFeignClients;

@SpringBootApplication

@EnableFeignClients

public class feignApplication {

    public static void main(String[] args) {

        SpringApplication.run(feignApplication.class,args);

    }

}

4.Handler

package com.southwind.Handler;

import com.southwind.entity.Student;

import com.southwind.fegin.FeignProviderClient;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.web.bind.annotation.*;

import java.util.Collection;

@RestController

@RequestMapping("/feign")

public class FeignHandler {

    @Autowired

    private FeignProviderClient feignProviderClient;

    @GetMapping("/findall")

    public Collection<Student> findall(){

        return feignProviderClient.findall();

    }

    @GetMapping("/findbyid/{id}")

    public Student findbyid(@PathVariable("id") Integer id){

        return feignProviderClient.findbyid(id);

    }

    @PostMapping("/save")

    public void save(@RequestBody Student student){

        feignProviderClient.save(student);

    }

    @DeleteMapping("/delete")

    public void deletebyid(Integer id){

        feignProviderClient.delete(id);

    }

}

5.声明的接口：

package com.southwind.fegin;

import com.southwind.entity.Student;

import org.springframework.cloud.openfeign.FeignClient;

import org.springframework.web.bind.annotation.*;

import java.util.Collection;

@FeignClient(value = "provider")

public interface FeignProviderClient {

    @GetMapping("/provider/findall")

    public Collection<Student> findall();

    @GetMapping("/provider/findbyid/{id}")

    public Student findbyid(@PathVariable("id") Integer id);

    @PostMapping("/provider/save")

    public void save(@RequestBody Student student);

    @DeleteMapping("/provider/delete/{id}")

    public void delete(@PathVariable("id") Integer id);

}

巴特西

Fiegn 声明式接口调用

五：Fiegn 声明式接口调用

什么是Fiegn

Fiegn 和Ribbion的区别：

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