• feginclient demo


    1.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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>com.example</groupId>
        <artifactId>demo</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <packaging>jar</packaging>
    
        <name>demo</name>
        <description>Demo project for Spring Boot</description>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>1.5.9.RELEASE</version>
            <relativePath/> <!-- lookup parent from repository -->
        </parent>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <java.version>1.8</java.version>
            <spring-cloud.version>Edgware.RELEASE</spring-cloud.version>
        </properties>
    
        <dependencies>
    
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-feign</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-eureka-server</artifactId>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-test</artifactId>
                <scope>test</scope>
            </dependency>
    
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-hystrix</artifactId>
            </dependency>
    
            <!-- Redis 缓存 -->
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-redis</artifactId>
            </dependency>
        </dependencies>
    
        <dependencyManagement>
            <dependencies>
                <dependency>
                    <groupId>org.springframework.cloud</groupId>
                    <artifactId>spring-cloud-dependencies</artifactId>
                    <version>${spring-cloud.version}</version>
                    <type>pom</type>
                    <scope>import</scope>
                </dependency>
            </dependencies>
        </dependencyManagement>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                </plugin>
            </plugins>
        </build>
    
    
    </project>
    View Code

    2.启动入口

    package com.example.demo;
    
    import feign.Request;
    import feign.Retryer;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
    import org.springframework.cloud.netflix.feign.EnableFeignClients;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    
    @SpringBootApplication()
    @EnableDiscoveryClient
    @EnableFeignClients
    public class DemoApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(DemoApplication.class, args);
        }
    
    
    }
    View Code

    3.FeginConfiguration  ,如果开启了熔断,要确保熔断的超时时间大于feinclient的超时时间,否则将fallback

    package com.example.demo;
    
    import feign.Request;
    import feign.Retryer;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    @Configuration
    public class FeginConfiguration {
        public static int connectTimeOutMillis = 5000;//超时时间
        public static int readTimeOutMillis = 5000;
        @Bean
        public Request.Options options() {
            return new Request.Options(connectTimeOutMillis, readTimeOutMillis);
        }
    
        //自定义重试次数
        @Bean
        public Retryer feignRetryer(){
            Retryer retryer = new Retryer.Default(100, 1000, 4);
            return retryer;
        }
    }
    View Code

    4.feginclient

    package com.example.demo;
    
    import org.springframework.cloud.netflix.feign.FeignClient;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.RequestParam;
    
    import java.util.List;
    
    //熔断  ,fallback = SchedualServiceHiHystric.class
    @FeignClient(value = "service-hi",fallback = SchedualServiceHiHystric.class,configuration = FeginConfiguration.class)
    public interface SchedualServiceHi {
        @RequestMapping(value = "/hi",method = RequestMethod.GET)
        String sayHiFromClientOne(@RequestParam(value = "name") String name);
    
        @RequestMapping(value = "/home/hello",method = RequestMethod.GET)
        String hello(@RequestParam(value = "name") String name);
    
        @RequestMapping(value = "/home/list",method = RequestMethod.GET)
        List<String> list();
    }
    View Code
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  • 原文地址:https://www.cnblogs.com/tiancai/p/9584735.html
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