《springcloud学习》 十三 feign 超时时间设置

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。

1.业务描述

      订单服务调用会员服务，服务服务处理逻辑代码中延迟1.5s，模拟处理业务逻辑

2.代码

         2.1会员服务

           

package com.fqyd.api.service.impl;

import com.fqyd.api.entity.User;
import com.fqyd.api.service.IMemberService;
import com.fqyd.util.BaseApiService;
import com.fqyd.util.BaseDataResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

/**
 * Description：
 * Author: wude
 * Date:  2019/7/25 15:36
 * Modified By:
 */
@RestController
public class MemberServiceImpl extends BaseApiService implements IMemberService {

    @RequestMapping("getUserInfo")
    @Override
    public BaseDataResult getUserInfo() {
        try {
            //延迟1.5s
            Thread.sleep(1500);
        } catch (Exception e) {

        }
        return setResultSuccess("订单服务调用会员接口成功...");
    }
}

package com.fqyd.util;

/**
 * Description：
 * Author: wude
 * Date:  2019/8/6 12:01
 * Modified By:
 */
public class BaseApiService {
    public  BaseDataResult setResultErr(Integer code,String msg){
        return setResult(code,msg,null);
    }

    /**
     * 返回错误，可以传msg
     * @param msg
     * @return
     */
    public BaseDataResult setResultError(String msg){
        return setResult(500,msg,null);
    }

    /**
     * 返回成功，可以穿data
     * @param data
     * @return
     */
    public BaseDataResult setResultSuccess(Object data){
        return  setResult(200,"处理成功",data);
    }

    /**
     * 返回成功，没有data值
     * @return
     */
    public BaseDataResult setResultSuccess(){
        return  setResult(200,"处理成功",null);
    }

    public BaseDataResult setResultSuccess(String msg){
        return  setResult(200,msg,null);
    }

    public BaseDataResult setResult(Integer code,String msg,Object  data){
        return new BaseDataResult(code,msg,data);
    }
}

package com.fqyd.api.service;

import com.fqyd.api.entity.User;
import com.fqyd.util.BaseDataResult;
import com.sun.xml.internal.org.jvnet.staxex.Base64Data;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

/**
 * Description：
 * Author: wude
 * Date:  2019/7/25 14:58
 * Modified By:
 */
@FeignClient("fqyd-member")
public interface IMemberService {
    /**
     * 获取会员信息
     * @param name
     * @return
     */
    @RequestMapping("getMember")
    public User getMember(@RequestParam("name") String name);

    @RequestMapping("/getUserInfo")
    public BaseDataResult getUserInfo();
}

fqyd-member会员服务的服务名

2.2订单服务

package com.fqyd.api.feign;

import com.fqyd.api.entity.User;
import com.fqyd.api.service.IMemberService;
import org.springframework.cloud.openfeign.FeignClient;

/**
 * Description：
 * Author: wude
 * Date:  2019/8/1 10:35
 * Modified By:
 */
@FeignClient("fqyd-member")
public interface MemberServiceFeign  extends IMemberService {

}

package com.fqyd.api.service.impl;

import com.fqyd.api.entity.User;
import com.fqyd.api.feign.MemberServiceFeign;
import com.fqyd.api.service.IOrderService;
import com.fqyd.util.BaseDataResult;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

/**
 * Description：
 * Author: wude
 * Date:  2019/7/25 17:39
 * Modified By:
 */
@RestController
public class OrderServiceImpl implements IOrderService {
    @Autowired
    private MemberServiceFeign memberServiceFeign;


    @RequestMapping("/orderToMemberUserInfo")
    @Override
    public BaseDataResult orderToMemberUserInfo() {
        return memberServiceFeign.getUserInfo();
    }
}

3.效果

项目中有依赖关系，建议下载源码。

http://localhost:8020/orderToMemberUserInfo

read time读取超时

解决方法：application.yml增加如下配置

#ribbon的超时时间
ribbon:
  ReadTimeout: 3000
  ConnectTimeout: 3000

因为feign默认时间是1s，配置成3秒后就解决了该问题 

 

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