docker之开发课程EdgeService

新建模块course-edge-servce

    
        org.springframework.boot
        spring-boot-starter-parent
        1.5.3.RELEASE
    
    4.0.0

    com.idig8
    course-edge-service
    1.0-SNAPSHOT

    
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            commons-lang
            commons-lang
            2.6
        
        
            io.dubbo.springboot
            spring-boot-starter-dubbo
            1.0.0
        
        
            com.idig8
            course-dubbo-service-api
            1.0-SNAPSHOT
        
        
            com.idig8
            user-edge-service-client
            1.0-SNAPSHOT
        

    

package com.idig8.course.controller;

import com.alibaba.dubbo.config.annotation.Reference;
import com.idig8.course.dto.CourseDTO;
import com.idig8.course.service.ICourseService;
import com.idig8.thrift.user.dto.UserDTO;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import java.util.List;

/**

Created by Michael on 2017/11/4.*/
@Controller
br/>@ResponseBody
courseList(HttpServletRequest request) {

UserDTO user = (UserDTO)request.getAttribute("user");
System.out.println(user.toString());

return courseService.courseList();

}
}

![](https://upload-images.jianshu.io/upload_images/11223715-58de6c1baaf6bccf.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

* 增加filter组件
``` java
package com.idig8.course.filter;

import com.idig8.thrift.user.dto.UserDTO;
import com.idig8.user.client.LoginFilter;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Created by liming.
 */
@Component
public class CourseFilter extends LoginFilter {

    @Value("${user.edge.service.addr}")
    private String userEdgeServiceAddr;

    @Override
    protected String userEdgeServiceAddr() {
        return userEdgeServiceAddr;
    }

    @Override
    protected void login(HttpServletRequest request, HttpServletResponse response, UserDTO userDTO) {

        request.setAttribute("user", userDTO);
    }
}

package com.idig8.course;

import com.idig8.course.filter.CourseFilter;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;

import java.util.ArrayList;
import java.util.List;

/**

Created by liming*/
@SpringBootApplication<br "="" rel="nofollow">br/>*/
@SpringBootApplication

public static void main(String args[]) {
SpringApplication.run(ServiceApplication.class, args);
}

@Bean
public FilterRegistrationBean filterRegistrationBean(CourseFilter courseFilter ) {
FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
filterRegistrationBean.setFilter(courseFilter);

List urlPatterns = new ArrayList();
urlPatterns.add("/*");
filterRegistrationBean.setUrlPatterns(urlPatterns);
return filterRegistrationBean;

}
}

![](https://upload-images.jianshu.io/upload_images/11223715-5cf13f17115c9b6d.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

* application.properties

``` properties
server.port=8081

#dubbo config
spring.dubbo.application.name=course-service
spring.dubbo.registry.address=zookeeper://47.98.183.16:2181
spring.dubbo.scan=com.idig8.course

user.edge.service.addr=127.0.0.1:8082

业务流程梳理

梳理下dubbo的思路

程序演示

启动服务（按照顺序）

PS：微服务跟之前说的一样就是互相通过RPC的方式进行通信，之间有自己的数据库，只是RPC暴露接口的方式来获取其他的微服务之间的数据。