1 files changed, 70 insertions, 0 deletions
diff --git a/app/discover/configuration.py b/app/discover/configuration.py
new file mode 100644
index 0000000..c7bc0c0
--- /dev/null
+++ b/app/discover/configuration.py
@@ -0,0 +1,70 @@
+###############################################################################
+# 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                                  #
+###############################################################################
+from utils.inventory_mgr import InventoryMgr
+from utils.logging.full_logger import FullLogger
+from utils.mongo_access import MongoAccess
+from utils.singleton import Singleton
+
+
+class Configuration(metaclass=Singleton):
+    def __init__(self, environments_collection="environments_config"):
+        super().__init__()
+        self.db_client = MongoAccess()
+        self.db = MongoAccess.db
+        self.inv = InventoryMgr()
+        self.collection = self.inv.collections.get(environments_collection)
+        self.env_name = None
+        self.environment = None
+        self.configuration = None
+        self.log = FullLogger()
+
+    def use_env(self, env_name):
+        self.log.info("Configuration taken from environment: {}".format(env_name))
+        self.env_name = env_name
+
+        envs = self.collection.find({"name": env_name})
+        if envs.count() == 0:
+            raise ValueError("use_env: could not find matching environment")
+        if envs.count() > 1:
+            raise ValueError("use_env: found multiple matching environments")
+
+        self.environment = envs[0]
+        self.configuration = self.environment["configuration"]
+
+    def get_env_config(self):
+        return self.environment
+
+    def get_configuration(self):
+        return self.configuration
+
+    def get_env_name(self):
+        return self.env_name
+
+    def update_env(self, values):
+        self.collection.update_one({"name": self.env_name},
+                                   {'$set': MongoAccess.encode_mongo_keys(values)})
+
+    def get(self, component):
+        try:
+            matches = [c for c in self.configuration if c["name"] == component]
+        except AttributeError:
+            raise ValueError("Configuration: environment not set")
+        if len(matches) == 0:
+            raise IndexError("No matches for configuration component: " + component)
+        if len(matches) > 1:
+            raise IndexError("Found multiple matches for configuration component: " + component)
+        return matches[0]
+
+    def has_network_plugin(self, name):
+        if 'mechanism_drivers' not in self.environment:
+            self.log.error('Environment missing mechanism_drivers definition: ' +
+                           self.environment['name'])
+        mechanism_drivers = self.environment['mechanism_drivers']
+        return name in mechanism_drivers