Add read-only-uris flag

lib/charms/data_platform_libs/v0/data_interfaces.py

@@ -331,7 +331,7 @@ def _on_topic_requested(self, event: TopicRequestedEvent):
 
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
-LIBPATCH = 41
+LIBPATCH = 42
 
 PYDEPS = ["ops>=2.0.0"]
 
@@ -1700,7 +1700,7 @@ def set_tls_ca(self, relation_id: int, tls_ca: str) -> None:
 class RequirerData(Data):
     """Requirer-side of the relation."""
 
-    SECRET_FIELDS = ["username", "password", "tls", "tls-ca", "uris"]
+    SECRET_FIELDS = ["username", "password", "tls", "tls-ca", "uris", "read-only-uris"]
 
     def __init__(
         self,
@@ -2749,6 +2749,19 @@ def uris(self) -> Optional[str]:
 
         return self.relation.data[self.relation.app].get("uris")
 
+    @property
+    def read_only_uris(self) -> Optional[str]:
+        """Returns the readonly connection URIs."""
+        if not self.relation.app:
+            return None
+
+        if self.secrets_enabled:
+            secret = self._get_secret("user")
+            if secret:
+                return secret.get("read-only-uris")
+
+        return self.relation.data[self.relation.app].get("read-only-uris")
+
     @property
     def version(self) -> Optional[str]:
         """Returns the version of the database.
@@ -2855,6 +2868,15 @@ def set_uris(self, relation_id: int, uris: str) -> None:
         """
         self.update_relation_data(relation_id, {"uris": uris})
 
+    def set_read_only_uris(self, relation_id: int, uris: str) -> None:
+        """Set the database readonly connection URIs in the application relation databag.
+
+        Args:
+            relation_id: the identifier for a particular relation.
+            uris: connection URIs.
+        """
+        self.update_relation_data(relation_id, {"read-only-uris": uris})
+
     def set_version(self, relation_id: int, version: str) -> None:
         """Set the database version in the application relation databag.