Checking whether a file is being written to tends to be very platform specific. I don't think that there's any Java library that manages it perfectly, but I could be wrong.
My inclination would be to watch for files in a directory, then poll their filesize. If it remains static for, say, 30 seconds, they we can assume they're complete. Alternatively, you could build a simple web app with a drag and drop file API. Users open the webpage, drag the Excel files to it, and you can then control the upload and processing directly, even providing feedback. - James On 11 December 2016 at 19:47, larry google groups <lawrencecloj...@gmail.com > wrote: > > I'm in a situation where we allow staff to upload Microsoft Excel files to > our servers, which we then parse and store the data in DynamoDB. > > I've only used file watchers once before, to watch for any change in a > directory. These seemed to trigger when a file was created in a directory > -- I recall I then tried to read from such files, but I got an error > because the file was still being written. I'm curious if there are file > watchers that I can have trigger when a file is fully uploaded, or fully > copied? > > My goal is to avoid the errors that occur when I try to read from a file > that is still being written to. > > > > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > --- > You received this message because you are subscribed to the Google Groups > "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
