Add new methods to registry data model interface in prep for moving verbs to using it

data/registry_model/interface.py

@@ -26,11 +26,12 @@ class RegistryDataInterface(object):
         or None if none. """
 
   @abstractmethod
-  def get_manifest_for_tag(self, tag):
+  def get_manifest_for_tag(self, tag, backfill_if_necessary=False):
     """ Returns the manifest associated with the given tag. """
 
   @abstractmethod
-  def lookup_manifest_by_digest(self, repository_ref, manifest_digest, allow_dead=False):
+  def lookup_manifest_by_digest(self, repository_ref, manifest_digest, allow_dead=False,
+                                include_legacy_image=False):
     """ Looks up the manifest with the given digest under the given repository and returns it
         or None if none. """
 
@@ -131,3 +132,73 @@ class RegistryDataInterface(object):
         NOTE: This method will only be necessary until we've completed the backfill, at which point
         it should be removed.
     """
+
+  @abstractmethod
+  def is_namespace_enabled(self, namespace_name):
+    """ Returns whether the given namespace exists and is enabled. """
+
+  @abstractmethod
+  def list_manifest_layers(self, manifest, include_placements=False):
+    """ Returns an *ordered list* of the layers found in the manifest, starting at the base and
+        working towards the leaf, including the associated Blob and its placements (if specified).
+        Returns None if the manifest could not be parsed and validated.
+    """
+
+  @abstractmethod
+  def lookup_derived_image(self, manifest, verb, varying_metadata=None, include_placements=False):
+    """
+    Looks up the derived image for the given manifest, verb and optional varying metadata and
+    returns it or None if none.
+    """
+
+  @abstractmethod
+  def lookup_or_create_derived_image(self, manifest, verb, storage_location, varying_metadata=None,
+                                     include_placements=False):
+    """
+    Looks up the derived image for the given maniest, verb and optional varying metadata
+    and returns it. If none exists, a new derived image is created.
+    """
+
+  @abstractmethod
+  def get_derived_image_signature(self, derived_image, signer_name):
+    """
+    Returns the signature associated with the derived image and a specific signer or None if none.
+    """
+
+  @abstractmethod
+  def set_derived_image_signature(self, derived_image, signer_name, signature):
+    """
+    Sets the calculated signature for the given derived image and signer to that specified.
+    """
+
+  @abstractmethod
+  def delete_derived_image(self, derived_image):
+    """
+    Deletes a derived image and all of its storage.
+    """
+
+  @abstractmethod
+  def set_derived_image_size(self, derived_image, compressed_size):
+    """
+    Sets the compressed size on the given derived image.
+    """
+
+  @abstractmethod
+  def get_torrent_info(self, blob):
+    """
+    Returns the torrent information associated with the given blob or None if none.
+    """
+
+  @abstractmethod
+  def set_torrent_info(self, blob, piece_length, pieces):
+    """
+    Sets the torrent infomation associated with the given blob to that specified.
+    """
+
+  @abstractmethod
+  def get_repo_blob_by_digest(self, repo_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.
+    """