Adds support for multiple alarm statuses

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

diff --git a/osm_mon/core/database.py b/osm_mon/core/database.py
index 56a1275..d1c2e6b 100644 (file)
--- a/osm_mon/core/database.py
+++ b/osm_mon/core/database.py
@@ -22,21 +22,25 @@
 # contact: bdiaz@whitestack.com or glavado@whitestack.com
 ##
 
+import json
 import logging
+import os
+import uuid
 
-from peewee import CharField, TextField, FloatField, Model
+from peewee import CharField, TextField, FloatField, Model, AutoField, Proxy
+from peewee_migrate import Router
 from playhouse.db_url import connect
 
-from osm_mon.core.settings import Config
+from osm_mon import migrations
+from osm_mon.core.config import Config
 
 log = logging.getLogger(__name__)
-cfg = Config.instance()
-cfg.read_environ()
 
-db = connect(cfg.DATABASE)
+db = Proxy()
 
 
 class BaseModel(Model):
+    id = AutoField(primary_key=True)
 
     class Meta:
         database = db
@@ -50,10 +54,11 @@ class VimCredentials(BaseModel):
     user = CharField()
     password = CharField()
     tenant_name = CharField()
-    config = TextField(default='{}')
+    config = TextField()
 
 
 class Alarm(BaseModel):
+    uuid = CharField(unique=True)
     name = CharField()
     severity = CharField()
     threshold = FloatField()
@@ -66,54 +71,87 @@ class Alarm(BaseModel):
 
 
 class DatabaseManager:
+    def __init__(self, config: Config):
+        db.initialize(connect(config.get('sql', 'database_uri')))
+
     def create_tables(self) -> None:
+        db.connect()
+        with db.atomic():
+            router = Router(db, os.path.dirname(migrations.__file__))
+            router.run()
+        db.close()
+
+    def get_credentials(self, vim_uuid: str = None) -> VimCredentials:
+        db.connect()
         try:
-            db.connect()
-            db.create_tables([VimCredentials, Alarm])
+            with db.atomic():
+                vim_credentials = VimCredentials.get_or_none(VimCredentials.uuid == vim_uuid)
+                return vim_credentials
+        finally:
             db.close()
-        except Exception:
-            log.exception("Error creating tables: ")
-
-    def get_credentials(self, vim_uuid) -> VimCredentials:
-        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."""
-        exists = VimCredentials.get_or_none(VimCredentials.uuid == vim_credentials.uuid)
-        if exists:
-            vim_credentials.uuid = exists.uuid
-        vim_credentials.save()
-        return vim_credentials
+        db.connect()
+        try:
+            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
+        finally:
+            db.close()
 
     def get_alarm(self, alarm_id) -> Alarm:
-        alarm = (Alarm.select()
-                 .where(Alarm.alarm_id == alarm_id)
-                 .get())
-        return alarm
+        db.connect()
+        try:
+            with db.atomic():
+                alarm = (Alarm.select()
+                         .where(Alarm.alarm_id == alarm_id)
+                         .get())
+                return alarm
+        finally:
+            db.close()
 
     def save_alarm(self, name, threshold, operation, severity, statistic, metric_name, vdur_name,
                    vnf_member_index, nsr_id) -> Alarm:
         """Saves alarm."""
-        alarm = Alarm()
-        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_id) -> None:
-        alarm = (Alarm.select()
-                 .where(Alarm.alarm_id == alarm_id)
-                 .get())
-        alarm.delete()
+        # TODO: Add uuid optional param and check if exists to handle updates (see self.save_credentials)
+        db.connect()
+        try:
+            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
+        finally:
+            db.close()
+
+    def delete_alarm(self, alarm_uuid) -> None:
+        db.connect()
+        with db.atomic():
+            alarm = (Alarm.select()
+                     .where(Alarm.uuid == alarm_uuid)
+                     .get())
+            alarm.delete_instance()
+        db.close()
 
     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)
+        config = json.loads(credentials.config)
+        if 'vim_type' in config:
+            vim_type = config['vim_type']
+            return str(vim_type.lower())
+        else:
+            return str(credentials.type)