1 files changed, 55 insertions, 0 deletions
diff --git a/app/discover/events/event_instance_update.py b/app/discover/events/event_instance_update.py
new file mode 100644
index 0000000..6231c30
--- /dev/null
+++ b/app/discover/events/event_instance_update.py
@@ -0,0 +1,55 @@
+###############################################################################
+# Copyright (c) 2017 Koren Lev (Cisco Systems), Yaron Yogev (Cisco Systems)   #
+# and others                                                                  #
+#                                                                             #
+# All rights reserved. This program and the accompanying materials            #
+# are made available under the terms of the Apache License, Version 2.0       #
+# which accompanies this distribution, and is available at                    #
+# http://www.apache.org/licenses/LICENSE-2.0                                  #
+###############################################################################
+import re
+
+from discover.events.event_base import EventBase, EventResult
+from discover.events.event_instance_add import EventInstanceAdd
+from discover.events.event_instance_delete import EventInstanceDelete
+
+
+class EventInstanceUpdate(EventBase):
+
+    def handle(self, env, values):
+        # find the host, to serve as parent
+        payload = values['payload']
+        instance_id = payload['instance_id']
+        state = payload['state']
+        old_state = payload['old_state']
+
+        if state == 'building':
+            return EventResult(result=False, retry=False)
+
+        if state == 'active' and old_state == 'building':
+            return EventInstanceAdd().handle(env, values)
+
+        if state == 'deleted' and old_state == 'active':
+            return EventInstanceDelete().handle(env, values)
+
+        name = payload['display_name']
+        instance = self.inv.get_by_id(env, instance_id)
+        if not instance:
+            self.log.info('instance document not found, aborting instance update')
+            return EventResult(result=False, retry=True)
+
+        instance['name'] = name
+        instance['object_name'] = name
+        name_path = instance['name_path']
+        instance['name_path'] = name_path[:name_path.rindex('/') + 1] + name
+
+        # TBD: fix name_path for descendants
+        if name_path != instance['name_path']:
+            self.inv.values_replace({
+                "environment": env,
+                "name_path": {"$regex": r"^" + re.escape(name_path + '/')}},
+                {"name_path": {"from": name_path, "to": instance['name_path']}})
+        self.inv.set(instance)
+        return EventResult(result=True,
+                           related_object=instance_id,
+                           display_context=instance_id)