Deliver notification info

Created by: stefanoborini

Notification system to communicate to the UI and other entities interested in notification.

force_bdss/core/workflow.py

@@ -3,6 +3,8 @@ from traits.api import HasStrictTraits, Instance, List
 from force_bdss.data_sources.base_data_source_model import BaseDataSourceModel
 from force_bdss.kpi.base_kpi_calculator_model import BaseKPICalculatorModel
 from force_bdss.mco.base_mco_model import BaseMCOModel
+from force_bdss.notification_listeners.base_notification_listener_model \
+    import BaseNotificationListenerModel
 
 
 class Workflow(HasStrictTraits):
@@ -18,3 +20,6 @@ class Workflow(HasStrictTraits):
     #: Contains the factory-specific KPI Calculator Model objects.
     #: The list can be empty
     kpi_calculators = List(BaseKPICalculatorModel)
+
+    #: Contains information about the listeners to be setup
+    notification_listeners = List(BaseNotificationListenerModel)