steveniemitz commented on a change in pull request #16229:
URL: https://github.com/apache/beam/pull/16229#discussion_r776508707
##########
File path: sdks/python/apache_beam/runners/dataflow/internal/apiclient.py
##########
@@ -556,9 +565,79 @@ def _get_sdk_image_overrides(self, pipeline_options):
return (
dict(s.split(',', 1) for s in sdk_overrides) if sdk_overrides else {})
+ @staticmethod
+ def _compute_sha256(file):
+ hasher = hashlib.sha256()
+ with open(file, 'rb') as f:
+ for chunk in iter(partial(f.read,
+ DataflowApplicationClient._HASH_CHUNK_SIZE),
+ b""):
+ hasher.update(chunk)
+ return hasher.hexdigest()
+
+ @staticmethod
+ def _split_gcs_path(path):
+ if not path.startswith('gs://'):
+ raise RuntimeError('Expected gs:// path, got %s', path)
+ return path[5:].split('/', 1)
+
+ def _cached_location(self, sha256):
+ sha_prefix = sha256[0:2]
+ return FileSystems.join(
+ self._root_staging_location,
+ DataflowApplicationClient._GCS_CACHE_PREFIX,
+ sha_prefix,
+ sha256)
+
+ @retry.with_exponential_backoff(
+ retry_filter=retry.retry_on_server_errors_and_timeout_filter)
+ def _gcs_object_exists(self, gcs_or_local_path):
+ if not gcs_or_local_path.startswith('gs://'):
+ return False
+ else:
+ bucket, name = self._split_gcs_path(gcs_or_local_path)
+ request = storage.StorageObjectsGetRequest(bucket=bucket, object=name)
+ try:
+ self._storage_client.objects.Get(request)
+ return True
+ except exceptions.HttpError as e:
+ return e.status_code not in (403, 404)
+
+ @retry.with_exponential_backoff(
+ retry_filter=retry.retry_on_server_errors_and_timeout_filter)
+ def _gcs_to_gcs_copy(self, from_gcs, to_gcs):
Review comment:
I didn't try that (or even knew it existed), it seems like it'd indeed
remove duplication here if it works correctly.
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