Implements filebased config, config override through env vars, use of osm

[osm/MON.git] / osm_mon / core / database.py

diff --git a/osm_mon/core/database.py b/osm_mon/core/database.py
index 2191106..eca08e9 100644 (file)
--- a/osm_mon/core/database.py
+++ b/osm_mon/core/database.py
@@ -23,45 +23,104 @@
 ##
 
 import logging
+import uuid
 
-from peewee import *
-from playhouse.sqlite_ext import SqliteExtDatabase
+from peewee import CharField, TextField, FloatField, Model, AutoField, Proxy
+from playhouse.db_url import connect
 
-from osm_mon.plugins.OpenStack.settings import Config
+from osm_mon.core.config import Config
 
 log = logging.getLogger(__name__)
-cfg = Config.instance()
 
-db = SqliteExtDatabase('mon.db')
+db = Proxy()
 
 
 class BaseModel(Model):
+    id = AutoField(primary_key=True)
+
     class Meta:
         database = db
 
 
 class VimCredentials(BaseModel):
-    uuid = CharField()
+    uuid = CharField(unique=True)
     name = CharField()
     type = CharField()
     url = CharField()
     user = CharField()
     password = CharField()
     tenant_name = CharField()
-    config = TextField()
+    config = TextField(default='{}')
+
+
+class Alarm(BaseModel):
+    uuid = CharField(unique=True)
+    name = CharField()
+    severity = CharField()
+    threshold = FloatField()
+    operation = CharField()
+    statistic = CharField()
+    monitoring_param = CharField()
+    vdur_name = CharField()
+    vnf_member_index = CharField()
+    nsr_id = CharField()
 
 
 class DatabaseManager:
-    def create_tables(self):
-        try:
-            db.connect()
-            db.create_tables([VimCredentials])
-            db.close()
-        except Exception as e:
-            log.exception("Error creating tables: ")
-
-    def get_credentials(self, vim_uuid):
-        return VimCredentials.get(VimCredentials.uuid == vim_uuid)
-
-    def save_credentials(self, vim_credentials):
-        vim_credentials.save()
+    def __init__(self, config: Config):
+        db.initialize(connect(config.get('sql', 'database_uri')))
+
+    def create_tables(self) -> None:
+        with db.atomic():
+            db.create_tables([VimCredentials, Alarm])
+
+    def get_credentials(self, vim_uuid: str = None) -> VimCredentials:
+        with db.atomic():
+            return VimCredentials.get_or_none(VimCredentials.uuid == vim_uuid)
+
+    def save_credentials(self, vim_credentials) -> VimCredentials:
+        """Saves vim credentials. If a record with same uuid exists, overwrite it."""
+        with db.atomic():
+            exists = VimCredentials.get_or_none(VimCredentials.uuid == vim_credentials.uuid)
+            if exists:
+                vim_credentials.id = exists.id
+            vim_credentials.save()
+            return vim_credentials
+
+    def get_alarm(self, alarm_id) -> Alarm:
+        with db.atomic():
+            alarm = (Alarm.select()
+                     .where(Alarm.alarm_id == alarm_id)
+                     .get())
+            return alarm
+
+    def save_alarm(self, name, threshold, operation, severity, statistic, metric_name, vdur_name,
+                   vnf_member_index, nsr_id) -> Alarm:
+        """Saves alarm."""
+        # TODO: Add uuid optional param and check if exists to handle updates (see self.save_credentials)
+        with db.atomic():
+            alarm = Alarm()
+            alarm.uuid = str(uuid.uuid4())
+            alarm.name = name
+            alarm.threshold = threshold
+            alarm.operation = operation
+            alarm.severity = severity
+            alarm.statistic = statistic
+            alarm.monitoring_param = metric_name
+            alarm.vdur_name = vdur_name
+            alarm.vnf_member_index = vnf_member_index
+            alarm.nsr_id = nsr_id
+            alarm.save()
+            return alarm
+
+    def delete_alarm(self, alarm_uuid) -> None:
+        with db.atomic():
+            alarm = (Alarm.select()
+                     .where(Alarm.uuid == alarm_uuid)
+                     .get())
+            alarm.delete_instance()
+
+    def get_vim_type(self, vim_account_id) -> str:
+        """Get the vim type that is required by the message."""
+        credentials = self.get_credentials(vim_account_id)
+        return str(credentials.type)