Add blob upload to new registry data model

data/registry_model/interface.py

@@ -197,9 +197,31 @@ class RegistryDataInterface(object):
     """
 
   @abstractmethod
-  def get_repo_blob_by_digest(self, repo_ref, blob_digest, include_placements=False):
+  def get_repo_blob_by_digest(self, repository_ref, blob_digest, include_placements=False):
     """
     Returns the blob in the repository with the given digest, if any or None if none. Note that
     there may be multiple records in the same repository for the same blob digest, so the return
     value of this function may change.
     """
+
+  @abstractmethod
+  def create_blob_upload(self, repository_ref, upload_id, location_name, storage_metadata):
+    """ Creates a new blob upload and returns a reference. If the blob upload could not be
+        created, returns None. """
+
+  @abstractmethod
+  def lookup_blob_upload(self, repository_ref, blob_upload_id):
+    """ Looks up the blob upload withn the given ID under the specified repository and returns it
+        or None if none.
+    """
+
+  @abstractmethod
+  def update_blob_upload(self, blob_upload, uncompressed_byte_count, piece_hashes, piece_sha_state,
+                         storage_metadata, byte_count, chunk_count, sha_state):
+    """ Updates the fields of the blob upload to match those given. Returns the updated blob upload
+        or None if the record does not exists.
+    """
+
+  @abstractmethod
+  def delete_blob_upload(self, blob_upload):
+    """ Deletes a blob upload record. """