T7121: add Config init from internal cache

The internal cache is used as a faster replacement to parsing the active
and proposed configs on initialization of a commit session.

1 files changed, 10 insertions, 0 deletions

diff --git a/python/vyos/configsource.py b/python/vyos/configsource.py
index 59e5ac8a1..65cef5333 100644
--- a/python/vyos/configsource.py
+++ b/python/vyos/configsource.py
@@ -319,3 +319,13 @@ class ConfigSourceString(ConfigSource):
             self._session_config = ConfigTree(session_config_text) if session_config_text else None
         except ValueError:
             raise ConfigSourceError(f"Init error in {type(self)}")
+
+class ConfigSourceCache(ConfigSource):
+    def __init__(self, running_config_cache=None, session_config_cache=None):
+        super().__init__()
+
+        try:
+            self._running_config = ConfigTree(internal=running_config_cache) if running_config_cache else None
+            self._session_config = ConfigTree(internal=session_config_cache) if session_config_cache else None
+        except ValueError:
+            raise ConfigSourceError(f"Init error in {type(self)}")