From c44a67cf54e18c203d8b0888f678a4e148caa0de Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20MOHIER?= <frederic.mohier@gmail.com>
Date: Fri, 23 Feb 2018 13:29:28 +0100
Subject: [PATCH] Closes #488: notify Alignak arbiter for some configuration
 modifications (new host, new realm)

---
 alignak_backend/app.py | 28 +++++++++++++++++++++++++++-
 etc/settings.json      |  6 ++++++
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/alignak_backend/app.py b/alignak_backend/app.py
index 6e075cca..da282b66 100755
--- a/alignak_backend/app.py
+++ b/alignak_backend/app.py
@@ -25,6 +25,9 @@
 
 import logging
 from logging.config import dictConfig as logger_dictConfig
+
+import requests
+
 from dateutil import parser
 
 from future.utils import iteritems
@@ -205,6 +208,21 @@ def _validate_schema_version(self, schema_version, field, value):
         return
 
 
+def notify_alignak(notification='reload_configuration'):
+    """Send a notification to the Alignak arbiter if configured"""
+    if not settings['ALIGNAK_URL'] or not notification:
+        return
+
+    headers = None
+    try:
+        current_app.logger.info("Notifying Alignak for: %s..." % notification)
+        response = requests.get(settings['ALIGNAK_URL'] + notification, headers=headers, timeout=10)
+        resp = response.json()
+        current_app.logger.info("Notified, response: %s..." % resp)
+    except Exception as exp:
+        current_app.logger.error("Alignak notification exception: %s..." % str(exp))
+
+
 # Hooks used to check user's rights
 def pre_get(resource, user_request, lookup):
     """Hook before get data. Add filter depend on roles of user
@@ -1235,6 +1253,9 @@ def after_insert_realm(items):
         }, False, False, **lookup)
         g.updateRealm = False
 
+    # Notify Alignak
+    notify_alignak(notification='reload_configuration')
+
 
 def after_update_realm(updated, original):
     """
@@ -1536,6 +1557,9 @@ def after_insert_host(items):
     if etags:
         g.replace_etags = etags
 
+    # Notify Alignak
+    notify_alignak(notification='reload_configuration')
+
 
 def pre_service_patch(updates, original):
     """
@@ -2027,6 +2051,8 @@ def get_settings(prev_settings):
 settings['SCHEDULER_TIMEZONE'] = 'Etc/GMT'
 settings['JOBS'] = []
 
+settings['ALIGNAK_URL'] = ''
+
 # Read configuration file to update/complete the configuration
 configuration_file = get_settings(settings)
 print("Application configuration file: %s" % configuration_file)
@@ -2079,7 +2105,7 @@ def get_settings(prev_settings):
 settings['DOMAIN'] = register_models()
 
 base_path = os.path.dirname(os.path.abspath(alignak_backend.__file__))
-print("Application base path: %s" % base_path)
+# print("Application base path: %s" % base_path)
 
 app = Eve(
     settings=settings,
diff --git a/etc/settings.json b/etc/settings.json
index b577832c..bb4c8af8 100644
--- a/etc/settings.json
+++ b/etc/settings.json
@@ -27,6 +27,12 @@
 
   "LOGGER": "alignak-backend-logger.json",  /* Python logger configuration file */
 
+  /* Address of Alignak arbiter
+  The Alignak backend will use this adress to notify Alignak about backend newly created items
+  Set to an empty value to disable this feature
+  */
+  "ALIGNAK_URL": "http://127.0.0.1:7770",
+
   /* As soon as a Graphite or Influx is existing in the backend, the received metrics are sent
   to the corresponding TSDB. If the TSDB is not available, metrics are stored internally
   in the backend.