I have a file scanner application in Java, that keeps scanning a directory on a server using FTP. gets list of files of the directory and downloads them one by one. on the other side, on the server, there's a process that writes these files. if I'm lucky I wouldn't try to download an incomplete file but how can I make sure if the write process on the server is complete and the file handle is closed, and file is ready to be downloaded?

I have no control on the write process which is on the server. moreover, I don't have write permission on the directory to try to get a write-handle in order to check if there's already a write handle open, so this option is off the table.

Is there an FTP function addressing this problem?

java ftp download
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