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原文鏈接地址：『高級篇』docker之開發(fā)課程EdgeService（16）
課程的edgeService依賴于課程服務(wù)的dubbo服務(wù)，對外提供的restAPI，跟用戶的EdgeService有點(diǎn)類似，只是一個(gè)調(diào)用的是thrift，一個(gè)調(diào)用的是dubbo，比較特殊的是課程的EdgeService需要用戶登錄后才可以訪問，如果沒有登錄的話，需要跳轉(zhuǎn)到登錄系統(tǒng)才可以訪問。源碼：https://github.com/limingios/msA-docker
新建模塊course-edge-servce
- pom增加依賴
<?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">
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.3.RELEASE</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<groupId>com.idig8</groupId>
<artifactId>course-edge-service</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>io.dubbo.springboot</groupId>
<artifactId>spring-boot-starter-dubbo</artifactId>
<version>1.0.0</version>
</dependency>
<dependency>
<groupId>com.idig8</groupId>
<artifactId>course-dubbo-service-api</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.idig8</groupId>
<artifactId>user-edge-service-client</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>
</project>
- controller 調(diào)用course-dubbo-service-api 中的接口
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
@RequestMapping("/course")
public class CourseController {
@Reference
private ICourseService courseService;
@RequestMapping(value = "/courseList", method = RequestMethod.GET)
@ResponseBody
public List<CourseDTO> courseList(HttpServletRequest request) {
UserDTO user = (UserDTO)request.getAttribute("user");
System.out.println(user.toString());
return courseService.courseList();
}
}
- 增加filter組件
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);
}
}
- 啟動(dòng)類
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
public class ServiceApplication {
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<String> urlPatterns = new ArrayList<String>();
urlPatterns.add("/*");
filterRegistrationBean.setUrlPatterns(urlPatterns);
return filterRegistrationBean;
}
}
- application.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
業(yè)務(wù)流程梳理
- 課程EdgeService 依賴用戶EdgeService服務(wù)，Thrift用戶服務(wù)，課程服務(wù)。
- 課程 EdgeService pom 依賴了用戶登錄user-edge-service-client，user-edge-service-client用于檢測用戶是否登錄功能。需要調(diào)用用戶的服務(wù)。
- 當(dāng)用戶完成登錄后，課程EdgeService 訪問課程服務(wù)，獲取課程的列表信息。
- 課程EdgeService 依賴用戶EdgeService服務(wù)，Thrift用戶服務(wù)登錄控制，登錄后的跳轉(zhuǎn)功能。
- 課程EdgeService 依賴與course-dubbo-service-api服務(wù)，用于獲取課程信息和用戶的課程信息。
梳理下dubbo的思路
- 建立對應(yīng)的api項(xiàng)目定義方法。最終提供一個(gè)jar包供調(diào)用方和服務(wù)提供方使用。
- 服務(wù)實(shí)現(xiàn)方引用api項(xiàng)目，實(shí)現(xiàn)里面的功能，提供端口，名稱，地址，zookeeper監(jiān)控中心。
- 服務(wù)調(diào)用方引用api項(xiàng)目，引用zookeeper的監(jiān)控中心發(fā)現(xiàn)服務(wù)。直接調(diào)用服務(wù)就可以用服務(wù)實(shí)現(xiàn)方的方法了。
程序演示
- 啟動(dòng)服務(wù)（按照順序）
- user-thrift-service
- user-edge-service
- course-dubbo-service
- course-edge-service
- 界面演示
- 訪問http://127.0.0.1:8081 自動(dòng)跳轉(zhuǎn)到http://127.0.0.1:8082/user/login
- 登錄獲取到token
3.訪問地址http://127.0.0.1:8081/course/courseList?token=ux4g5z98mowv0qr6r6e6ietdo00nh0vl
PS：微服務(wù)跟之前說的一樣就是互相通過RPC的方式進(jìn)行通信，之間有自己的數(shù)據(jù)庫，只是RPC暴露接口的方式來獲取其他的微服務(wù)之間的數(shù)據(jù)。
