Java的新项目学成在线笔记-day9（十五）

5.4 课程预览服务端 
5.4.1 Api定义 
此Api是课程管理前端请求服务端进行课程预览的Api 请求：课程Id
响应：课程预览Url 1、定义响应类型

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@Data
 @ToString
@NoArgsConstructor public class CoursePublishResult extends ResponseResult {
  String previewUrl;
  public CoursePublishResult(ResultCode resultCode,String previewUrl) {
       super(resultCode);
     this.previewUrl = previewUrl;
    } }

2、接口定义如下
 

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@ApiOperation("预览课程")
public CoursePublishResult preview(String id);

5.4.2 创建 Feign Client 
在课程管理工程创建CMS服务的Feign Client，通过此Client远程请求cms添加页面。
 

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@FeignClient(value = XcServiceList.XC_SERVICE_MANAGE_CMS)
  public interface CmsPageClient{
     //保存页面
    @PostMapping("/cms/page/save")
    public CmsPageResult save(@RequestBody CmsPage cmsPage);  }

5.4.3  Service 
1、配置添加页面参数信息
在application.yml中配置：
 

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course‐publish:
 siteId: 5b30cba5f58b4411fc6cb1e5
  templateId: 5b345a6b94db44269cb2bfec
previewUrl: [url]http://www.xuecheng.com/cms/preview/[/url]
 pageWebPath: /course/detail/
 pagePhysicalPath: /course/detail/
 dataUrlPre: http://localhost:31200/course/courseview/

2、代码如下：
 

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@Value("${course‐publish.dataUrlPre}")
   private String publish_dataUrlPre;
   @Value("${course‐publish.pagePhysicalPath}")
  private String publish_page_physicalpath;
   @Value("${course‐publish.pageWebPath}")
   private String publish_page_webpath;
    @Value("${course‐publish.siteId}")
   private String publish_siteId;
    @Value("${course‐publish.templateId}")
  private String publish_templateId;
  @Value("${course‐publish.previewUrl}")
   private String previewUrl;
       //根据id查询课程基本信息
  public CourseBase findCourseBaseById(String courseId){
     Optional<CourseBase>
 baseOptional = courseBaseRepository.findById(courseId);
        if(baseOptional.isPresent()){

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CourseBase courseBase = baseOptional.get();
         return courseBase;
    }
   ExceptionCast.cast(CourseCode.COURSE_GET_NOTEXISTS);
    return null;
   }
//课程预览
  public CoursePublishResult preview(String courseId){
      CourseBase one = this.findCourseBaseById(courseId);
       //发布课程预览页面
     CmsPage cmsPage = new CmsPage();
      //站点
  cmsPage.setSiteId(publish_siteId);//课程预览站点
     //模板
  cmsPage.setTemplateId(publish_templateId);
    //页面名称
     cmsPage.setPageName(courseId+".html");
      //页面别名
    cmsPage.setPageAliase(one.getName());
 //页面访问路径
     cmsPage.setPageWebPath(publish_page_webpath);
      //页面存储路径
    cmsPage.setPagePhysicalPath(publish_page_physicalpath);
      //数据url
cmsPage.setDataUrl(publish_dataUrlPre+courseId);
       //远程请求cms保存页面信息
   CmsPageResult cmsPageResult = cmsPageClient.save(cmsPage);
    if(!cmsPageResult.isSuccess()){
        return new CoursePublishResult(CommonCode.FAIL,null);
    }
   //页面id
   String pageId = cmsPageResult.getCmsPage().getPageId();
   //页面url
    String pageUrl = previewUrl+pageId;
     return new CoursePublishResult(CommonCode.SUCCESS,pageUrl);
    }

5.4.4 Controller 

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@Override
@PostMapping("/preview/{id}") public CoursePublishResult
preview(@PathVariable("id") String id) {
    return courseService.preview(id); }