Added chunk_size parameter to LocalFilesystemToGCSOperator (apache#40379

)

airflow/providers/google/cloud/transfers/local_to_gcs.py

@@ -32,7 +32,7 @@
 
 class LocalFilesystemToGCSOperator(BaseOperator):
     """
-    Uploads a file or list of files to Google Cloud Storage; optionally can compress the file for upload.
+    Uploads a file or list of files to Google Cloud Storage; optionally can compress the file for upload; optionally can upload the data in multiple chunks.
 
     .. seealso::
         For more information on how to use this operator, take a look at the guide:
@@ -47,6 +47,7 @@ class LocalFilesystemToGCSOperator(BaseOperator):
     :param gcp_conn_id: (Optional) The connection ID used to connect to Google Cloud.
     :param mime_type: The mime-type string
     :param gzip: Allows for file to be compressed and uploaded as gzip
+    :param chunk_size: Blob chunk size in bytes. This must be a multiple of 262144 bytes (256 KiB)
     :param impersonation_chain: Optional service account to impersonate using short-term
         credentials, or chained list of accounts required to get the access_token
         of the last account in the list, which will be impersonated in the request.
@@ -73,6 +74,7 @@ def __init__(
         gcp_conn_id="google_cloud_default",
         mime_type="application/octet-stream",
         gzip=False,
+        chunk_size: int | None = None,
         impersonation_chain: str | Sequence[str] | None = None,
         **kwargs,
     ):
@@ -84,6 +86,7 @@ def __init__(
         self.gcp_conn_id = gcp_conn_id
         self.mime_type = mime_type
         self.gzip = gzip
+        self.chunk_size = chunk_size
         self.impersonation_chain = impersonation_chain
 
     def execute(self, context: Context):
@@ -114,4 +117,5 @@ def execute(self, context: Context):
                 mime_type=self.mime_type,
                 filename=filepath,
                 gzip=self.gzip,
+                chunk_size=self.chunk_size,
             )

docs/apache-airflow-providers-google/operators/transfer/local_to_gcs.rst

@@ -34,7 +34,7 @@ LocalFilesystemToGCSOperator
 :class:`~airflow.providers.google.cloud.transfers.local_to_gcs.LocalFilesystemToGCSOperator` allows you to upload
 data from local filesystem to GCS.
 
-When you use this operator, you can optionally compress the data being uploaded.
+When you use this operator, you can optionally compress the data being uploaded. The operator also supports uploading data in multiple chunks optionally.
 
 Below is an example of using this operator to upload a file to GCS.
 

docs/spelling_wordlist.txt

@@ -901,6 +901,7 @@ keyring
 keyspace
 keytab
 kfp
+KiB
 Kibana
 killMode
 Kinesis

newsfragments/40379.improvement.rst

@@ -0,0 +1 @@
+``chunk_size`` parameter is added to ``LocalFilesystemToGCSOperator``, enabling file uploads in multiple chunks of a specified size.

tests/providers/google/cloud/transfers/test_local_to_gcs.py

@@ -31,7 +31,12 @@
 
 
 class TestFileToGcsOperator:
-    _config = {"bucket": "dummy", "mime_type": "application/octet-stream", "gzip": False}
+    _config = {
+        "bucket": "dummy",
+        "mime_type": "application/octet-stream",
+        "gzip": False,
+        "chunk_size": 262144,
+    }
 
     def setup_method(self):
         args = {"owner": "airflow", "start_date": datetime.datetime(2017, 1, 1)}
@@ -61,6 +66,7 @@ def test_init(self):
         assert operator.bucket == self._config["bucket"]
         assert operator.mime_type == self._config["mime_type"]
         assert operator.gzip == self._config["gzip"]
+        assert operator.chunk_size == self._config["chunk_size"]
 
     @mock.patch("airflow.providers.google.cloud.transfers.local_to_gcs.GCSHook", autospec=True)
     def test_execute(self, mock_hook):
@@ -79,6 +85,7 @@ def test_execute(self, mock_hook):
             gzip=self._config["gzip"],
             mime_type=self._config["mime_type"],
             object_name="test/test1.csv",
+            chunk_size=self._config["chunk_size"],
         )
 
     @pytest.mark.db_test
@@ -110,6 +117,7 @@ def test_execute_multiple(self, mock_hook):
                 gzip=self._config["gzip"],
                 mime_type=self._config["mime_type"],
                 object_name=object_name,
+                chunk_size=self._config["chunk_size"],
             )
             for filepath, object_name in files_objects
         ]
@@ -131,6 +139,7 @@ def test_execute_wildcard(self, mock_hook):
                 gzip=self._config["gzip"],
                 mime_type=self._config["mime_type"],
                 object_name=object_name,
+                chunk_size=self._config["chunk_size"],
             )
             for filepath, object_name in files_objects
         ]