http://www.exampledepot.com/egs/java.io/CreateTempFile.html
On Sat, Feb 14, 2009 at 4:38 PM, Mark H. <mark.hoem...@gmail.com> wrote: > > On Feb 14, 6:48 am, James Reeves <weavejes...@googlemail.com> wrote: >> I've been having some difficulty coming up with a scheme for writing >> to files in a thread-safe manner. The files are named with the hash of >> their content, so they are effectively immutable. >> >> The problem comes with writing them for the first time. I need to >> ensure that while a file is initially being written, no other thread >> attempts to read or write to the file. >> >> The best solution I've come up with so far is to write to a temporary >> file, then rename the file to its hash once it has been closed. This >> seems to work, but I'd be very interested to know how other people >> have handled similar concurrent I/O problems in Clojure. > > I've encountered this problem before when programming in other > languages. I much prefer the temporary file approach; it works nicely > like a transaction, so you can abort the operation without messing up > any files in your working directory. > > POSIX I/O supports (via the mkstemp() call) generating a unique > temporary file which is opened in a single filesystem-atomic > operation, so you can ensure that no other thread opens a temporary > file with that name. Does Java have a similar facility? > > mfh > > > -- And what is good, Phaedrus, And what is not good— Need we ask anyone to tell us these things? --~--~---------~--~----~------------~-------~--~----~ 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 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 -~----------~----~----~----~------~----~------~--~---
