Hi Miroslav, I think the best way to proceed is for you to create a JIRA and attach your code and unit tests.
Thank you for sharing! :) Gary -----Original Message----- From: Miroslav Pokorny [mailto:[email protected]] Sent: Wednesday, July 20, 2011 20:31 PM To: Commons Users List Subject: Re: [vfs] Hi Gary, While it is true that FTP is typically thought of as a streaming rather than random access file system, VFS does support random access reading. This is confirmed of course by the list of capabilities and code. I have a hacked version which supports random writing and does so using the following strategy. - all read - if outputstream present flush and closeand clear - continue with reading byte(s) - seek - if outputstream present flush and closeand clear - perform seek. - // input and output streams are clear(nulled) and will be recreated by the next read / write - write methods - if outputstream is absent connect to server and restart at file pointer position - write byte(s). While it appears to work, i thought there might have been some deeper reasoning behinid the lack of inbuilt support in FtpFileProvider. After all that the same strategy is used for reading as i have described for writing. My code is however a mess as i have only implemented writing for some RandomAccessContent. If anyone is interested id be happy to share. On Jul 20, 2011, at 0:45, "Miroslav Pokorny" <[email protected]> > wrote: > > > Hiho > > > > I was just playing with Apache Commons VFS (thanks guys) and noticed > > that > >> Ftp FileSystem< does not support random access writing as confirmed > >> by > > examining the capabilities. > > > > [LIST_CHILDREN, URI, GET_LAST_MODIFIED, RENAME, APPEND_CONTENT, > > DELETE, GET_TYPE, RANDOM_ACCESS_READ, READ_CONTENT, WRITE_CONTENT, > > CREATE] > > > > It does however support random accesss reading and im just wondering > > is there a particular reason why writing is not supported ? > > > > Hello, > > The reason is probably as simple as the protocol is not a natural > match for the feature. With FTP you stream the whole file up or down, > not a random piece. > > Gary > > > tya > > > > mP > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > -- mP --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
