# This example shows how to obtain current state information for the condition instance corresponding to a Source and 
# certain ConditionName.
 
import time
import win32com.client
 
serverDescriptor = win32com.client.Dispatch('OpcLabs.EasyOpc.ServerDescriptor')
serverDescriptor.UrlString = 'opcae://localhost/OPCLabs.KitEventServer.2'
 
sourceDescriptor = win32com.client.Dispatch('OpcLabs.EasyOpc.AlarmsAndEvents.AENodeDescriptor')
sourceDescriptor.QualifiedName = "Simulation.ConditionState1"
 
# Instantiate the client object
client = win32com.client.Dispatch('OpcLabs.EasyOpc.AlarmsAndEvents.EasyAEClient') 
 
print('Getting condition state...')
conditionState = client.GetConditionState(serverDescriptor, sourceDescriptor, 'Simulated', [])
 
print('ConditionState:')
print('    .ActiveSubcondition: ', conditionState.ActiveSubcondition)
print('    .Enabled: ', conditionState.Enabled)
print('    .Active: ', conditionState.Active)
print('    .Acknowledged: ', conditionState.Acknowledged)
print('    .Quality: ', conditionState.Quality)
# Note that IAEConditionState has many more properties
 
print()
print('Finished.')

# This example shows how to subscribe to events and obtain the notification events by pulling them.
 
import time
import win32com.client
 
serverDescriptor = win32com.client.Dispatch('OpcLabs.EasyOpc.ServerDescriptor')
serverDescriptor.ServerClass = 'OPCLabs.KitEventServer.2'
 
# Instantiate the client object
client = win32com.client.Dispatch('OpcLabs.EasyOpc.AlarmsAndEvents.EasyAEClient') 
# In order to use event pull, you must set a non-zero queue capacity upfront.
client.PullNotificationQueueCapacity = 1000
 
print('Subscribing events...')
subscriptionParameters = win32com.client.Dispatch('OpcLabs.EasyOpc.AlarmsAndEvents.AESubscriptionParameters')
subscriptionParameters.NotificationRate = 1000
hanle = client.SubscribeEvents(serverDescriptor, subscriptionParameters, True, None)
 
print('Processing event notifications for 1 minute...')
endTime = time.time() + 60
while time.time() < endTime:
    eventArgs = client.PullNotification(2*1000)
    if eventArgs is not None:
        # Handle the notification event
        print(eventArgs)
 
print('Unsubscribing events...')
client.UnsubscribeAllItems()
 
print('Finished.')