1 files changed, 49 insertions, 0 deletions
diff --git a/src/python/netconf_server/sysrepo_interface/config_change_subscriber.py b/src/python/netconf_server/sysrepo_interface/config_change_subscriber.py
new file mode 100644
index 0000000..faa8254
--- /dev/null
+++ b/src/python/netconf_server/sysrepo_interface/config_change_subscriber.py
@@ -0,0 +1,49 @@
+###
+# ============LICENSE_START=======================================================
+# Netconf Server
+# ================================================================================
+# Copyright (C) 2021 Nokia. All rights reserved.
+# ================================================================================
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ============LICENSE_END=========================================================
+###
+
+import logging
+
+from netconf_server.sysrepo_interface.config_change_data import ConfigChangeData
+
+logger = logging.getLogger("sysrep_config_change_subscriber")
+
+
+class ConfigChangeSubscriber(object):
+
+    def __init__(self, module_name: str, callback_function: callable = None):
+        self.module_name = module_name
+        if callback_function is None:
+            self.callback_function = self.default_callback
+        else:
+            self.callback_function = callback_function
+
+    def subscribe_on_model_change(self, session):
+        logger.info("Subscribing on config change for module %s" % self.module_name)
+        session.subscribe_module_change(
+            self.module_name, None, self.on_module_have_changed, asyncio_register=True
+        )
+
+    async def on_module_have_changed(self, event: str, req_id: int, changes: list, private_data: any):
+        logger.debug("Module changed: %s (request ID %s)" % (event, req_id))
+        self.callback_function(ConfigChangeData(event, req_id, changes))
+
+    @staticmethod
+    def default_callback(config_change_data: ConfigChangeData):
+        logger.info("Received module changed: %s , %s " % (config_change_data.event, config_change_data.changes))