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- waits for the completion of any previous calls to
and reports potentially pending errors.
Calling this method is potentially expensive (even if the associated
XOutputStream represents a local
file not accessed via NFS, for example). This method has a similar
However, where the semantics of
flush are rather vague,
waitForCompletion has very specific semantics—it just
blocks long enough so that any errors encountered during previous calls
can reliably be reported. It specificially does not guarantee that any
data have savely been stored on a stable physical medium, like a hard
disk (and it is completely unspecified whether
give this guarantee).
if any previous call to XOutputStream::writeBytes encountered
such an error, but has not yet reported it (in cases where
writeBytes operates asynchronously).
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