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If I accept a file from a MultipartRequest and call
File f = request.getFile("fileName");
Is the file written to disk (as a temp file) or is it only stored in memory at this point?
Assuming you’re talking about the o’Reilly MultipartRequest it’ll always be written to disk according to the link.
Update
If you’re talking about the Spring commons FileUpload component, it does support this setup. One of the properties you can set is
setMaxInMemorySize(int bytes)which determines the max size of a file that will be held in memory and not written to disk.