def _do_update_update(self, data, offset):
"""
I start the Servermap update that gets us the data we need to
continue the update process. I return a Deferred that fires when
the servermap update is done.
"""
assert IMutableUploadable.providedBy(data)
assert self.is_mutable()
# offset == self.get_size() is valid and means that we are
# appending data to the file.
assert offset <= self.get_size()
segsize = self._version[3]
# We'll need the segment that the data starts in, regardless of
# what we'll do later.
start_segment = offset // segsize
# We only need the end segment if the data we append does not go
# beyond the current end-of-file.
end_segment = start_segment
if offset + data.get_size() < self.get_size():
end_data = offset + data.get_size()
# The last byte we touch is the end_data'th byte, which is actually
# byte end_data - 1 because bytes are zero-indexed.
end_data -= 1
end_segment = end_data // segsize
self._start_segment = start_segment
self._end_segment = end_segment
# Now ask for the servermap to be updated in MODE_WRITE with
# this update range.
return self._update_servermap(update_range=(start_segment,
end_segment))
def _do_update_update(self, data, offset):
"""
I start the Servermap update that gets us the data we need to
continue the update process. I return a Deferred that fires when
the servermap update is done.
"""
assert IMutableUploadable.providedBy(data)
assert self.is_mutable()
# offset == self.get_size() is valid and means that we are
# appending data to the file.
assert offset <= self.get_size()
segsize = self._version[3]
# We'll need the segment that the data starts in, regardless of
# what we'll do later.
start_segment = offset // segsize
# We only need the end segment if the data we append does not go
# beyond the current end-of-file.
end_segment = start_segment
if offset + data.get_size() < self.get_size():
end_data = offset + data.get_size()
# The last byte we touch is the end_data'th byte, which is actually
# byte end_data - 1 because bytes are zero-indexed.
end_data -= 1
end_segment = end_data // segsize
self._start_segment = start_segment
self._end_segment = end_segment
# Now ask for the servermap to be updated in MODE_WRITE with
# this update range.
return self._update_servermap(update_range=(start_segment,
end_segment))
def _get_initial_contents(self, contents):
if contents is None:
return MutableData("")
if IMutableUploadable.providedBy(contents):
return contents
assert callable(contents), "%s should be callable, not %s" % \
(contents, type(contents))
return contents(self)
def _get_initial_contents(self, contents):
if contents is None:
return MutableData("")
if IMutableUploadable.providedBy(contents):
return contents
assert callable(contents), "%s should be callable, not %s" % \
(contents, type(contents))
return contents(self)
def _overwrite(self, new_contents):
assert IMutableUploadable.providedBy(new_contents)
assert self._servermap.get_last_update()[0] == MODE_WRITE
return self._upload(new_contents)
def _overwrite(self, new_contents):
assert IMutableUploadable.providedBy(new_contents)
assert self._servermap.get_last_update()[0] == MODE_WRITE
return self._upload(new_contents)