Spring Cloud之Feign客户端超时时间配置

浅浅的花香味﹌ 2022-01-28 11:27 431阅读 0赞

# [Spring Cloud之Feign客户端超时时间配置][Spring Cloud_Feign] #

关于雪崩效应：

默认情况下tomcat只有一个线程去处理客户端发送的所有请求。高并发情况下，如果客户端请求都在同一接口，tomcat的所有线程池去处理，导致其他接口服务访问不了，等待。

Tomcat有个线程池，每个线程去处理客户端发送每次请求。

在parent项目里面再创建一个项目，common

Eureka server： 略

Member :

service

![1179709-20181114221543903-1131685869.png][]

package com.toov5.api.entity;
    
    import lombok.Data;
    
    @Data
    public class UserEntity {
        private String name;
        private Integer age;
       
    }

package com.toov5.api.service;
    
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.RestController;
    
    import com.toov5.api.entity.UserEntity;
    import com.toov5.base.ResponseBase;
    
    @RestController
    public interface IMemberService {
     
        @RequestMapping("/getMember")  //接口加@RequestMapping 被其他项目调用时候 feign客户端可以继承
        public UserEntity getMember(@RequestParam("name") String name);
        
        @RequestMapping("/getUserInfo")
        public ResponseBase getUserInfo();
        
    }

实现类：

![1179709-20181114221632326-636747972.png][]

package com.toov5.api.service.impl;
    
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.bind.annotation.RestController;
    
    import com.toov5.api.entity.UserEntity;
    import com.toov5.api.service.IMemberService;
    import com.toov5.base.BaseApiService;
    import com.toov5.base.ResponseBase;
    
       //注意加在实现类上面！！！ 接口不能加 接口不能被实例化
    @RestController
    public class MemberServiceImpl extends BaseApiService implements IMemberService {
        
         @RequestMapping("/getMember")  
        public UserEntity getMember(@RequestParam("name") String name) {
            UserEntity userEntity = new UserEntity();
            userEntity.setName(name);
            userEntity.setAge(10);
            return userEntity;
        }
         
         @RequestMapping("/getUserInfo") 
         public ResponseBase getUserInfo() {
            try {
                Thread.sleep(1500);
            } catch (Exception e) {
                
            }
            return setResultSuccess("订单服务接口调用会员服务接口成功....");
        }
     
    }

启动类

package com.toov5.api.service.impl;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
    import org.springframework.cloud.openfeign.EnableFeignClients;
    
    @SpringBootApplication (scanBasePackages={"com.toov5.*"})
    @EnableEurekaClient
    @EnableFeignClients
    public class AppMember {
      public static void main(String[] args) {
        SpringApplication.run(AppMember.class, args);
    }
    }

yml

###服务启动端口号
    server:
      port: 8000
    ###服务名称(服务注册到eureka名称)  
    spring:
        application:
            name: app-toov5-member
    ###服务注册到eureka地址
    eureka:
      client:
        service-url:
               defaultZone: http://localhost:8100/eureka
    
               
    ###因为该应用为注册中心，不会注册自己
        register-with-eureka: true
    ###是否需要从eureka上获取注册信息
        fetch-registry: true

pom：

<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.toov5</groupId>
        <artifactId>parent</artifactId>
        <version>0.0.1-SNAPSHOT</version>
      </parent>
      <artifactId>toov5-api-member-service-impl</artifactId>
      
      	<dependencies> 
      	 	<dependency>
      	 	  <groupId>com.toov5</groupId>
               <artifactId>toov5-api-member-service</artifactId>
                 <version>0.0.1-SNAPSHOT</version>
      	 	</dependency>	
      	 	<dependency>
      	 	  <groupId>com.toov5</groupId>
                <artifactId>toov5-api-order-service</artifactId>
                 <version>0.0.1-SNAPSHOT</version>
      	 	</dependency>	 	
      	</dependencies>
      
    </project>

Order:

service

![1179709-20181114221811910-692241415.png][]

pom：

<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.toov5</groupId>
        <artifactId>toov5-api-service</artifactId>
        <version>0.0.1-SNAPSHOT</version>
      </parent>
      <artifactId>toov5-api-order-service</artifactId>
        <dependencies>
        <dependency>
          <groupId>com.toov5</groupId>
        <artifactId>toov5.common</artifactId>
        <version>0.0.1-SNAPSHOT</version>  
        </dependency>
       
      </dependencies>
    </project>

接口

package com.toov5.api.service;
    
    import org.springframework.web.bind.annotation.RequestMapping;
    
    import com.toov5.base.ResponseBase;
    
    public interface IOrderService {
       //订单服务带哦用会员服务接口信息fegin
        @RequestMapping("/orderToMember")
        public String orderToMember(String name);
        
        
        //订单服务接口调用会员服务接口
        @RequestMapping("/orderToMemberUserInfo")
        public ResponseBase orderToMemberUserInfo();
        
    }

![1179709-20181114221934012-912158528.png][]

pom：

<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.toov5</groupId>
    		<artifactId>parent</artifactId>
    		<version>0.0.1-SNAPSHOT</version>
    	</parent>
    	<artifactId>toov5-api-order-service-impl</artifactId>
    
    	<dependencies>
    		<dependency>
               <groupId>com.toov5</groupId>
    			<artifactId>toov5-api-order-service</artifactId>
    			<version>0.0.1-SNAPSHOT</version>
    		</dependency>
    		
         <dependency>
               <groupId>com.toov5</groupId>
    			<artifactId>toov5-api-member-service</artifactId>
    			<version>0.0.1-SNAPSHOT</version>
    		</dependency>
    	</dependencies>
    
    
    </project>

package com.toov5.api.service.impl;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import com.toov5.api.entity.UserEntity;
    import com.toov5.api.feign.MemberServiceFeign;
    import com.toov5.api.service.IOrderService;
    import com.toov5.base.ResponseBase;
    
    @RestController
    public class OrderServiceImpl implements IOrderService {
            @Autowired
          private MemberServiceFeign memberServiceFeign; 
        
          @RequestMapping("/orderToMmeber")
          public String orderToMember(String name) {
          UserEntity user = memberServiceFeign.getMember(name);
            return  user==null ? "没有找到用户先关信息" : user.toString();
        }
          
         @RequestMapping("/orderToMemberUserInfo")
          public ResponseBase orderToMemberUserInfo() {     
              return  memberServiceFeign.getUserInfo();
        }
    }

package com.toov5.api.feign;
    
    import org.springframework.cloud.openfeign.FeignClient;
    
    import com.toov5.api.service.IMemberService;
    //避免了冗余代码 直接过来就ok了
    @FeignClient("app-toov5-member")
    public interface MemberServiceFeign extends IMemberService {
       //实体类是存放接口项目还是存放在实现项目 实体类存放在接口项目里面
        //实体类和定义接口信息存放在接口项目
        //代码实现放在接口实现类里面
    }

yml：

###服务启动端口号
    server:
      port: 8001
    ###服务名称(服务注册到eureka名称)  
    spring:
        application:
            name: app-toov5-order
    ###服务注册到eureka地址
    eureka:
      client:
        service-url:
               defaultZone: http://localhost:8100/eureka
    
               
    ###因为该应用为注册中心，不会注册自己
        register-with-eureka: true
    ###是否需要从eureka上获取注册信息
        fetch-registry: true
    
        ###设置feign客户端超时时间
    ribbon: ###指的是建立连接所用的时间，适用于网络状况正常的情况下，两端连接所用的时间。 ReadTimeout: 5000 ###指的是建立连接后从服务器读取到可用资源所用的时间。 ConnectTimeout: 5000
      
      #spring cloud 默认开启ribbon   
    ribbon:
    ###指的是建立连接所用的时间，适用于网络状况正常的情况下，两端连接所用的时间。
     ReadTimeout: 5000
    ###指的是建立连接后从服务器读取到可用资源所用的时间。 
     ConnectTimeout: 5000
      
      #spring cloud 默认开启ribbon

启动类

package com.toov5.api;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
    import org.springframework.cloud.openfeign.EnableFeignClients;
    
    @SpringBootApplication(scanBasePackages={"com.toov5.*"})
    @EnableEurekaClient
    @EnableFeignClients
    public class AppOrder {
       public static void main(String[] args) {
        SpringApplication.run(AppOrder.class, args);
    }
    }

结果：

![1179709-20181114222214101-289355787.png][]

[Spring Cloud_Feign]: https://www.cnblogs.com/toov5/p/9960803.html
[1179709-20181114221543903-1131685869.png]: /images/20220128/7873d109565c44719c1e8330343cdbdf.png
[1179709-20181114221632326-636747972.png]: /images/20220128/74ca06a011094ae1a354c9850cfa0e9d.png
[1179709-20181114221811910-692241415.png]: /images/20220128/8963c2652ea34c6b9de1d5c2ec7fe0d2.png
[1179709-20181114221934012-912158528.png]: /images/20220128/e6f9243d51f4465a9bb4db1f3215182b.png
[1179709-20181114222214101-289355787.png]: /images/20220128/d0229b26ad3f481d8d394bb7d0500fc9.png