Re: return to the begin of InputStream
On Fri, 4 Dec 2009, Daniel Pitts wrote:
Lothar Kimmeringer wrote:
Daniel Pitts wrote:
[File.createTempFile()]
Unless you call "file.deleteOnExit()", then it will get deleted
automagically (except on JVM crash).
.... and on long running server processes.
True, ideally you would have:
try { handleTempFile(file); } finally {file.delete();}
Although this still doesn't handle crashes. I think there is a trick you
can do on unix to have files deleted even when the process crashes -
something like create, open, then delete the directory entry, so that the
only reference keeping the file alive is from the open filehandle, which
will die when the process exits - but i don't know if there's a way to use
it from java. Or even that this is definitely correct.
However, by default, createTempFile puts files in java.io.tmpdir, which on
unix machines will typically be /tmp. Files there are subject to deletion
at the whim of the OS, so to an extent, you can delegate the problem of
worrying about deleting files to that.
That said, i'm not sure what current unixen's policies towards /tmp are; i
believe linux will only delete things at reboot, not during normal
operation, which makes this less useful. I used a system (OSF/1?) at some
point that had a /scr, for scratch, which was deleted more aggressively,
which would be ideal for this.
tom
--
.... to build a space elevator, that's got to be hundreds of thousands
of pounds ... -- Mike Froggatt