updates data service cache (methods to set and get values)

src/pydase/data_service/data_service_cache.py

@@ -1,7 +1,12 @@
 import logging
 from typing import TYPE_CHECKING, Any
 
-from pydase.utils.serializer import set_nested_value_by_path
+from pydase.utils.serializer import (
+    SerializationPathError,
+    SerializationValueError,
+    get_nested_dict_by_path,
+    set_nested_value_by_path,
+)
 
 if TYPE_CHECKING:
     from pydase import DataService
@@ -24,11 +29,11 @@ class DataServiceCache:
         logger.debug("Initializing cache.")
         self._cache = self.service.serialize()
 
-    def update_cache(self, parent_path: str, name: str, value: Any) -> None:
-        # Remove the part before the first "." in the parent_path
-        parent_path = ".".join(parent_path.split(".")[1:])
+    def update_cache(self, full_access_path: str, value: Any) -> None:
+        set_nested_value_by_path(self._cache, full_access_path, value)
 
-        # Construct the full path
-        full_path = f"{parent_path}.{name}" if parent_path else name
-
-        set_nested_value_by_path(self._cache, full_path, value)
+    def get_value_dict_from_cache(self, full_access_path: str) -> dict[str, Any] | None:
+        try:
+            return get_nested_dict_by_path(self._cache, full_access_path)
+        except (SerializationPathError, SerializationValueError, KeyError):
+            return None