From: Aegir S. <Aeg...@Su...> - 2005-09-08 09:01:12
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Hi, Steve: Sounds like a good idea. Please give me some time to think about it. And I will try to give my comments in this week. Regards, Aegir steve chang wrote: > Hello team, > After I tracked the code and ran the project, I propose my idea for > the ftp support. I hope you can give me comments about it. > class diagram http://homepage3.seed.net.tw/web@5/stevechang/class.png > sequence diagram for create a new download task > http://homepage3.seed.net.tw/web@5/stevechang/seq.png > The design is based on the abstract factory design pattern. > ProtocolFactory is an abstract factory class that creates > ProtocolDownloadHelper, Protocol and Command. > Based on the original code, DownloadMap and DownloadRange aren't > dependent on protocol. So they aren't appear on the class diagram. > In order to seperate the quickget from protocol implementation > clearly, I use protocol and command interface to wrap the httpclient > library and ftp implementation is also wrapped under the same interface. > I also find a ftp implementation that has a similar architecture with > httpclient under apache common net project. > Hope for your comment. > Regards, > Steve |