下载管理模块类图

2016-12-28 15:11:38   0  举报

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下载管理模块类图主要包含以下几个部分：用户接口、下载管理器、文件处理器和网络连接。用户接口负责与用户进行交互，接收用户的下载请求，并将下载状态反馈给用户。下载管理器负责管理下载任务，包括创建、删除、暂停和继续下载任务。文件处理器负责处理下载的文件，包括保存文件、打开文件和删除文件等操作。网络连接负责与服务器进行通信，获取文件信息并发送下载请求。这些类之间通过消息传递进行交互，共同完成下载管理工作。

作者其他创作

大纲/内容

DownloadListener

+ onDownloadStatusChange(DownloadFile file);+ onDownloadFileListChange(List downloadFileList );

DownloadConfig

- downloadTaskNum:int- overtime:int+ retryTimes:int- defaultDownloadPath:string

DownloadStatus

- DownloadStatusDownloadable- DownloadStatusDownloading- DownloadStatusPause- DownloadStatusComplete- DownloadStatusError

DownloadCacheManager

- removeDownloadFile(DownloadFile *file)

DownloadTask

- DownloadFile *file- DownloadTaskListener *listener;- 第三方downloader

- startDownload- stopDownload- setDownloadTaskListener

DownloadTaskManager

+ downloadTaskMap:Map DownloadTask

- startDispatch()- createAndRunTask(DownloadFile file)- pauseTask(DownloadFile file)- removeTask(DownloadFile file)- isFileDownloading(DownloadFile *file)- findTaskByDownloadFile(DownloadFile file)- findDownloadFileByTask(DownloadTask task)

维护downloadTask数组，管下载调度

DownloadFile

+ fileName:string+ fileSize:long+ fileType:int+ downloadUrl:string+ downloadedSize:long+ status:int+ downloadPath:string+ downloadId

DownloadUtil

- reloadData()- startDownload(LTVoice *voice)- pauseDownload(LTVoice *voice)- resumeDownload(LTVoice *voice)- removeDownload(LTVoice *voice)- setDownloadListener(DownloadListener *listener)- getDownloadFinishList():Array- getDownloadUnFinishList():Array- downloadfileToltvoice(DownloadFile *file):LTVoice

DownloadManager

DownloadConfig *downloadConfig;DownloadTaskManager downloadTaskManager;DownloadListManager downloadListManager;DownloadCacheManager downloadCacheManager;

- reloadData()- startDownload(DownloadFile*file)- pauseDownload(DownloadFile*file)- resumeDownload(DownloadFile*file)- removeDownload(DownloadFile*file)- setDownloadListener(DownloadListener *listener)- getDownloadFileList()

DownloadDataConverter

- ltvoiceTodownloadfile(LTVoice *voice):DownloadFile- downloadfileToltvoice(DownloadFile *file):LTVoice

DownloadTaskListener

startDispatch的下载调度逻辑包括获取可下载文件，创建下载任务，并设施下载任务的回调，若下载任务下载完成，调度器从DownloadListManager获取可下载文件

DownloadListManager

+ downloadFileMap:Map + downloadableFileList:Array

//取出固定可下载文件列表（取出包括get和delete的过程）- takeoutDownloadableFileList:(fileNum)int- getDownloadFileList- getDownloadFinishFileList- addDownloadFile(DownloadFile *file)- removeDownloadFile(DownloadFile *file)- updateDownloadFile(DownloadFile *file)//整理下载列表- arrange()