Spring Cloud之Feign客戶端超時時間配置

關於雪崩效應：  

默認情況下tomcat只有一個線程去處理客戶端發送的所有請求。高並發情況下，如果客戶端請求都在同一接口，tomcat的所有線程池去處理，導致其他接口服務訪問不了，等待。

Tomcat有個線程池，每個線程去處理客戶端發送每次請求。

 

在parent項目里面再創建一個項目，common

 Eureka server： 略

 

Member :

service

 

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 被其他項目調用時候 feign客戶端可以繼承
    public UserEntity getMember(@RequestParam("name") String name);
    
    @RequestMapping("/getUserInfo")
    public ResponseBase getUserInfo();
    
}

 

實現類：

 

 

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;

   //注意加在實現類上面！！！ 接口不能加 接口不能被實例化
@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("訂單服務接口調用會員服務接口成功....");
    }
 
}

啟動類

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

###服務啟動端口號
server:
  port: 8000
###服務名稱(服務注冊到eureka名稱)  
spring:
    application:
        name: app-toov5-member
###服務注冊到eureka地址
eureka:
  client:
    service-url:
           defaultZone: http://localhost:8100/eureka

           
###因為該應用為注冊中心，不會注冊自己
    register-with-eureka: true
###是否需要從eureka上獲取注冊信息
    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

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 {
   //訂單服務帶哦用會員服務接口信息fegin
    @RequestMapping("/orderToMember")
    public String orderToMember(String name);
    
    
    //訂單服務接口調用會員服務接口
    @RequestMapping("/orderToMemberUserInfo")
    public ResponseBase orderToMemberUserInfo();
    
}

 

　

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 ? "沒有找到用戶先關信息" : 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;
//避免了冗余代碼 直接過來就ok了
@FeignClient("app-toov5-member")
public interface MemberServiceFeign extends IMemberService {
   //實體類是存放接口項目還是存放在實現項目 實體類存放在接口項目里面
    //實體類和定義接口信息存放在接口項目
    //代碼實現放在接口實現類里面
}

yml：

###服務啟動端口號
server:
  port: 8001
###服務名稱(服務注冊到eureka名稱)  
spring:
    application:
        name: app-toov5-order
###服務注冊到eureka地址
eureka:
  client:
    service-url:
           defaultZone: http://localhost:8100/eureka

           
###因為該應用為注冊中心，不會注冊自己
    register-with-eureka: true
###是否需要從eureka上獲取注冊信息
    fetch-registry: true

    ###設置feign客戶端超時時間
ribbon:
###指的是建立連接所用的時間，適用於網絡狀況正常的情況下，兩端連接所用的時間。
 ReadTimeout: 5000
###指的是建立連接后從服務器讀取到可用資源所用的時間。 
 ConnectTimeout: 5000
  
  #spring cloud 默認開啟ribbon   

　　

　啟動類

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);
}
}

 

　結果：