openstack/trove
Code Issues Proposed changes

Merge "Follow up: Ibd8dbb8ad8fe895ba9d14e00038ed08e99fbfe0c"

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This commit is contained in:
Zuul
2025-07-03 06:22:03 +00:00
committed by Gerrit Code Review
parent e9c02dc19c bb358f9402
commit 58bc2aee27
1 changed files with 10 additions and 24 deletions
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34
backup/storage/swift.py
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@@ -76,7 +76,7 @@ class StreamReader(object):
self.filename = filename
self.max_file_size = max_file_size
# Will be incremented to 0 in _start_new_segment
self.file_number = -1
self.file_number = 0
# True if the entire original stream is exhausted
self.end_of_file = False
# tempfile.TemporaryFile for current segment
@@ -87,12 +87,7 @@ class StreamReader(object):
self._buffer_read_offset = 0
# True when the current segment is fully read from original stream
self._segment_fully_buffered = False
# These properties store the final checksum and length of the segment
# after it has been fully read before starting a new segment
self._segment_final_checksum = None
self._segment_final_length = 0
# Initialize the first segment
self._start_new_segment()
self._prepare_for_new_segment = True
def _start_new_segment(self):
# Prepares for a new segment by creating a new buffer and
@@ -101,7 +96,6 @@ class StreamReader(object):
# Store the final checksum before closing the buffer
self._current_segment_buffer.close()
self.file_number += 1
# Using a temporary file for buffering as segments can be large (2GB)
self._current_segment_buffer = tempfile.TemporaryFile()
self._current_segment_checksum = hashlib.md5()
@@ -137,6 +131,10 @@ class StreamReader(object):
# original stream. This loop will run until the current segment's
# data is entirely in _current_segment_buffer or the original
# stream is exhausted.
if self._prepare_for_new_segment:
self._start_new_segment()
self._prepare_for_new_segment = False
if not self._segment_fully_buffered:
while True:
if (self._current_segment_length + chunk_size) > \
@@ -175,22 +173,12 @@ class StreamReader(object):
if not data and not self.end_of_file:
LOG.info("StreamReader: Finished serving data for segment %s. "
"Preparing for next.", self.segment)
# before we start a new_segment, we need to save the
# current checksum
self._segment_final_checksum = \
self._current_segment_checksum.hexdigest()
self._segment_final_length = self._current_segment_length
self._start_new_segment()
self._prepare_for_new_segment = True
self.file_number += 1
return b''
# If we've reached the end of the file, just return empty
if not data and self.end_of_file:
# update final_checksum after all data is read
self._segment_final_checksum = \
self._current_segment_checksum.hexdigest()
self._segment_final_length = self._current_segment_length
# Close the buffer after all data is read
self._current_segment_buffer.close()
return b''
return data
@@ -221,14 +209,12 @@ class StreamReader(object):
@property
def segment_checksum(self):
"""Returns the checksum of the *current* segment."""
return self._segment_final_checksum or \
self._current_segment_checksum.hexdigest()
return self._current_segment_checksum.hexdigest()
@property
def segment_length(self):
"""Returns the length of the *current* segment."""
return self._segment_final_length or \
self._current_segment_checksum.hexdigest()
return self._current_segment_length
def release_buffer(self):
"""Manually release the current segment buffer."""