Looking for java library for directories synchronization [closed]

Question

I'm looking for a java library (not tool) that will provide synchronizing local directory with directory on server (ftp). What I need is to put a set of files on server and then I want all clients to have (download when required) the same version of these files.

I noticed that VFS depends on time of file modification. What I need is a library that will use mechanism like hash/delta. Something like rsync, but lib not tool.

Answer 1

Commons / VFS is an abstraction over different file systems and protocols (including FTP) with a common API. It has an ant task called SyncTask that synchronizes two virtual file systems (one or more of which can be a real file system). Ant task docs are here. Perhaps you can either use that or look into the underlying code.