def test_pub_and_sub(self):
ar = event.AsyncResult()
gq = queue.Queue()
self.count = 0
def cb(*args, **kwargs):
self.count += 1
gq.put(args[0])
if self.count == 2:
ar.set()
sub = EventSubscriber(event_type="ResourceEvent", callback=cb, origin="specific")
pub = EventPublisher(event_type="ResourceEvent")
self._listen(sub)
pub.publish_event(origin="specific", description="hello")
event_obj = bootstrap.IonObject('ResourceEvent', origin='specific', description='more testing')
self.assertEqual(event_obj, pub.publish_event_object(event_obj))
with self.assertRaises(BadRequest) as cm:
event_obj = bootstrap.IonObject('ResourceEvent', origin='specific', description='more testing', ts_created='2423')
pub.publish_event_object(event_obj)
self.assertIn( 'The ts_created value is not a valid timestamp',cm.exception.message)
with self.assertRaises(BadRequest) as cm:
event_obj = bootstrap.IonObject('ResourceEvent', origin='specific', description='more testing', ts_created='1000494978462')
pub.publish_event_object(event_obj)
self.assertIn( 'This ts_created value is too old',cm.exception.message)
with self.assertRaises(BadRequest) as cm:
event_obj = bootstrap.IonObject('ResourceEvent', origin='specific', description='more testing')
event_obj._id = '343434'
pub.publish_event_object(event_obj)
self.assertIn( 'The event object cannot contain a _id field',cm.exception.message)
ar.get(timeout=5)
res = []
for x in xrange(self.count):
res.append(gq.get(timeout=5))
self.assertEquals(len(res), self.count)
self.assertEquals(res[0].description, "hello")
self.assertAlmostEquals(int(res[0].ts_created), int(get_ion_ts()), delta=5000)
self.assertEquals(res[1].description, "more testing")
self.assertAlmostEquals(int(res[1].ts_created), int(get_ion_ts()), delta=5000)
class UserNotificationService(BaseUserNotificationService):
"""
A service that provides users with an API for CRUD methods for notifications.
"""
def __init__(self, *args, **kwargs):
self._schedule_ids = []
BaseUserNotificationService.__init__(self, *args, **kwargs)
def on_start(self):
#---------------------------------------------------------------------------------------------------
# Get the event Repository
#---------------------------------------------------------------------------------------------------
# self.ION_NOTIFICATION_EMAIL_ADDRESS = '*****@*****.**'
self.ION_NOTIFICATION_EMAIL_ADDRESS = CFG.get_safe('server.smtp.sender')
#---------------------------------------------------------------------------------------------------
# Create an event processor
#---------------------------------------------------------------------------------------------------
self.event_processor = EmailEventProcessor()
#---------------------------------------------------------------------------------------------------
# load event originators, types, and table
#---------------------------------------------------------------------------------------------------
self.notifications = {}
#---------------------------------------------------------------------------------------------------
# Dictionaries that maintain information about users and their subscribed notifications
# The reverse_user_info is calculated from the user_info dictionary
#---------------------------------------------------------------------------------------------------
self.user_info = {}
self.reverse_user_info = {}
#---------------------------------------------------------------------------------------------------
# Get the clients
#---------------------------------------------------------------------------------------------------
self.discovery = DiscoveryServiceClient()
self.process_dispatcher = ProcessDispatcherServiceClient()
self.event_publisher = EventPublisher()
self.datastore = self.container.datastore_manager.get_datastore('events')
self.start_time = get_ion_ts()
#------------------------------------------------------------------------------------
# Create an event subscriber for Reload User Info events
#------------------------------------------------------------------------------------
def reload_user_info(event_msg, headers):
'''
Callback method for the subscriber to ReloadUserInfoEvent
'''
notification_id = event_msg.notification_id
log.debug("(UNS instance received a ReloadNotificationEvent. The relevant notification_id is %s" % notification_id)
try:
self.user_info = self.load_user_info()
except NotFound:
log.warning("ElasticSearch has not yet loaded the user_index.")
self.reverse_user_info = calculate_reverse_user_info(self.user_info)
log.debug("(UNS instance) After a reload, the user_info: %s" % self.user_info)
log.debug("(UNS instance) The recalculated reverse_user_info: %s" % self.reverse_user_info)
# the subscriber for the ReloadUSerInfoEvent
self.reload_user_info_subscriber = EventSubscriber(
event_type="ReloadUserInfoEvent",
origin='UserNotificationService',
callback=reload_user_info
)
self.add_endpoint(self.reload_user_info_subscriber)
def on_quit(self):
"""
Handles stop/terminate.
Cleans up subscribers spawned here, terminates any scheduled tasks to the scheduler.
"""
for sid in self._schedule_ids:
try:
self.clients.scheduler.cancel_timer(sid)
except IonException as ex:
log.info("Ignoring exception while cancelling schedule id (%s): %s: %s", sid, ex.__class__.__name__, ex)
super(UserNotificationService, self).on_quit()
def __now(self):
"""
This method defines what the UNS uses as its "current" time
"""
return datetime.utcnow()
def set_process_batch_key(self, process_batch_key = ''):
"""
This method allows an operator to set the process_batch_key, a string.
Once this method is used by the operator, the UNS will start listening for timer events
published by the scheduler with origin = process_batch_key.
@param process_batch_key str
"""
def process(event_msg, headers):
self.end_time = get_ion_ts()
# run the process_batch() method
self.process_batch(start_time=self.start_time, end_time=self.end_time)
self.start_time = self.end_time
# the subscriber for the batch processing
"""
To trigger the batch notification, have the scheduler create a timer with event_origin = process_batch_key
"""
self.batch_processing_subscriber = EventSubscriber(
event_type="TimerEvent",
origin=process_batch_key,
callback=process
)
self.add_endpoint(self.batch_processing_subscriber)
def create_notification(self, notification=None, user_id=''):
"""
Persists the provided NotificationRequest object for the specified Origin id.
Associate the Notification resource with the user_id string.
returned id is the internal id by which NotificationRequest will be identified
in the data store.
@param notification NotificationRequest
@param user_id str
@retval notification_id str
@throws BadRequest if object passed has _id or _rev attribute
"""
if not user_id:
raise BadRequest("User id not provided.")
log.debug("Create notification called for user_id: %s, and notification: %s", user_id, notification)
#---------------------------------------------------------------------------------------------------
# Persist Notification object as a resource if it has already not been persisted
#---------------------------------------------------------------------------------------------------
# if the notification has already been registered, simply use the old id
notification_id = self._notification_in_notifications(notification, self.notifications)
# since the notification has not been registered yet, register it and get the id
temporal_bounds = TemporalBounds()
temporal_bounds.start_datetime = get_ion_ts()
temporal_bounds.end_datetime = ''
if not notification_id:
notification.temporal_bounds = temporal_bounds
notification_id, _ = self.clients.resource_registry.create(notification)
self.notifications[notification_id] = notification
else:
log.debug("Notification object has already been created in resource registry before. No new id to be generated. notification_id: %s", notification_id)
# Read the old notification already in the resource registry
notification = self.clients.resource_registry.read(notification_id)
# Update the temporal bounds of the old notification resource
notification.temporal_bounds = temporal_bounds
# Update the notification in the resource registry
self.clients.resource_registry.update(notification)
log.debug("The temporal bounds for this resubscribed notification object with id: %s, is: %s", notification_id,notification.temporal_bounds)
# Link the user and the notification with a hasNotification association
assocs= self.clients.resource_registry.find_associations(subject=user_id,
predicate=PRED.hasNotification,
object=notification_id,
id_only=True)
if assocs:
log.debug("Got an already existing association: %s, between user_id: %s, and notification_id: %s", assocs,user_id,notification_id)
return notification_id
else:
log.debug("Creating association between user_id: %s, and notification_id: %s", user_id, notification_id )
self.clients.resource_registry.create_association(user_id, PRED.hasNotification, notification_id)
# read the registered notification request object because this has an _id and is more useful
notification = self.clients.resource_registry.read(notification_id)
# Update the user info object with the notification
self.event_processor.add_notification_for_user(new_notification=notification, user_id=user_id)
#-------------------------------------------------------------------------------------------------------------------
# Generate an event that can be picked by a notification worker so that it can update its user_info dictionary
#-------------------------------------------------------------------------------------------------------------------
log.debug("(create notification) Publishing ReloadUserInfoEvent for notification_id: %s", notification_id)
self.event_publisher.publish_event( event_type= "ReloadUserInfoEvent",
origin="UserNotificationService",
description= "A notification has been created.",
notification_id = notification_id)
return notification_id
def update_notification(self, notification=None, user_id = ''):
"""Updates the provided NotificationRequest object. Throws NotFound exception if
an existing version of NotificationRequest is not found. Throws Conflict if
the provided NotificationRequest object is not based on the latest persisted
version of the object.
@param notification NotificationRequest
@throws BadRequest if object does not have _id or _rev attribute
@throws NotFound object with specified id does not exist
@throws Conflict object not based on latest persisted object version
"""
raise NotImplementedError("This method needs to be worked out in terms of implementation")
# #-------------------------------------------------------------------------------------------------------------------
# # Get the old notification
# #-------------------------------------------------------------------------------------------------------------------
#
# old_notification = self.clients.resource_registry.read(notification._id)
#
# #-------------------------------------------------------------------------------------------------------------------
# # Update the notification in the notifications dict
# #-------------------------------------------------------------------------------------------------------------------
#
#
# self._update_notification_in_notifications_dict(new_notification=notification,
# notifications=self.notifications)
# #-------------------------------------------------------------------------------------------------------------------
# # Update the notification in the registry
# #-------------------------------------------------------------------------------------------------------------------
# '''
# Since one user should not be able to update the notification request resource without the knowledge of other users
# who have subscribed to the same notification request, we do not update the resource in the resource registry
# '''
#
## self.clients.resource_registry.update(notification)
#
# #-------------------------------------------------------------------------------------------------------------------
# # reading up the notification object to make sure we have the newly registered notification request object
# #-------------------------------------------------------------------------------------------------------------------
#
# notification_id = notification._id
# notification = self.clients.resource_registry.read(notification_id)
#
# #------------------------------------------------------------------------------------
# # Update the UserInfo object
# #------------------------------------------------------------------------------------
#
# user = self.update_user_info_object(user_id, notification)
#
# #-------------------------------------------------------------------------------------------------------------------
# # Generate an event that can be picked by notification workers so that they can update their user_info dictionary
# #-------------------------------------------------------------------------------------------------------------------
# log.info("(update notification) Publishing ReloadUserInfoEvent for updated notification")
#
# self.event_publisher.publish_event( event_type= "ReloadUserInfoEvent",
# origin="UserNotificationService",
# description= "A notification has been updated.",
# notification_id = notification_id
# )
def read_notification(self, notification_id=''):
"""Returns the NotificationRequest object for the specified notification id.
Throws exception if id does not match any persisted NotificationRequest
objects.
@param notification_id str
@retval notification NotificationRequest
@throws NotFound object with specified id does not exist
"""
notification = self.clients.resource_registry.read(notification_id)
return notification
def delete_notification(self, notification_id=''):
"""For now, permanently deletes NotificationRequest object with the specified
id. Throws exception if id does not match any persisted NotificationRequest.
@param notification_id str
@throws NotFound object with specified id does not exist
"""
#-------------------------------------------------------------------------------------------------------------------
# Stop the event subscriber for the notification
#-------------------------------------------------------------------------------------------------------------------
notification_request = self.clients.resource_registry.read(notification_id)
#-------------------------------------------------------------------------------------------------------------------
# Update the resource registry
#-------------------------------------------------------------------------------------------------------------------
notification_request.temporal_bounds.end_datetime = get_ion_ts()
self.clients.resource_registry.update(notification_request)
#-------------------------------------------------------------------------------------------------------------------
# Find users who are interested in the notification and update the notification in the list maintained by the UserInfo object
#-------------------------------------------------------------------------------------------------------------------
user_ids, _ = self.clients.resource_registry.find_subjects(RT.UserInfo, PRED.hasNotification, notification_id, True)
for user_id in user_ids:
self.update_user_info_object(user_id, notification_request)
#-------------------------------------------------------------------------------------------------------------------
# Generate an event that can be picked by a notification worker so that it can update its user_info dictionary
#-------------------------------------------------------------------------------------------------------------------
log.info("(delete notification) Publishing ReloadUserInfoEvent for notification_id: %s", notification_id)
self.event_publisher.publish_event( event_type= "ReloadUserInfoEvent",
origin="UserNotificationService",
description= "A notification has been deleted.",
notification_id = notification_id)
# def delete_notification_from_user_info(self, notification_id):
# """
# Helper method to delete the notification from the user_info dictionary
#
# @param notification_id str
# """
#
# user_ids, assocs = self.clients.resource_registry.find_subjects(object=notification_id, predicate=PRED.hasNotification, id_only=True)
#
# for assoc in assocs:
# self.clients.resource_registry.delete_association(assoc)
#
# for user_id in user_ids:
#
# value = self.user_info[user_id]
#
# for notif in value['notifications']:
# if notification_id == notif._id:
# # remove the notification
# value['notifications'].remove(notif)
#
# self.reverse_user_info = calculate_reverse_user_info(self.user_info)
def find_events(self, origin='', type='', min_datetime=0, max_datetime=0, limit= -1, descending=False):
"""
This method leverages couchdb view and simple filters. It does not use elastic search.
Returns a list of events that match the specified search criteria. Will throw a not NotFound exception
if no events exist for the given parameters.
@param origin str
@param event_type str
@param min_datetime int seconds
@param max_datetime int seconds
@param limit int (integer limiting the number of results (0 means unlimited))
@param descending boolean (if True, reverse order (of production time) is applied, e.g. most recent first)
@retval event_list []
@throws NotFound object with specified parameters does not exist
@throws NotFound object with specified parameters does not exist
"""
event_tuples = []
try:
event_tuples = self.container.event_repository.find_events(event_type=type, origin=origin, start_ts=min_datetime, end_ts=max_datetime, limit=limit, descending=descending)
except Exception as exc:
log.warning("The UNS find_events operation for event origin = %s and type = %s failed. Error message = %s", origin, type, exc.message)
events = [item[2] for item in event_tuples]
log.debug("(find_events) UNS found the following relevant events: %s", events)
return events
#todo Uses Elastic Search. Later extend this to a larger search criteria
def find_events_extended(self, origin='', type='', min_time= 0, max_time=0, limit=-1, descending=False):
"""Uses Elastic Search. Returns a list of events that match the specified search criteria. Will throw a not NotFound exception
if no events exist for the given parameters.
@param origin str
@param type str
@param min_time int seconds
@param max_time int seconds
@param limit int (integer limiting the number of results (0 means unlimited))
@param descending boolean (if True, reverse order (of production time) is applied, e.g. most recent first)
@retval event_list []
@throws NotFound object with specified parameters does not exist
@throws NotFound object with specified parameters does not exist
"""
query = []
if min_time and max_time:
query.append( "SEARCH 'ts_created' VALUES FROM %s TO %s FROM 'events_index'" % (min_time, max_time))
if origin:
query.append( 'search "origin" is "%s" from "events_index"' % origin)
if type:
query.append( 'search "type_" is "%s" from "events_index"' % type)
search_string = ' and '.join(query)
# get the list of ids corresponding to the events
ret_vals = self.discovery.parse(search_string)
if len(query) > 1:
events = self.datastore.read_mult(ret_vals)
else:
events = [i['_source'] for i in ret_vals]
log.debug("(find_events_extended) Discovery search returned the following event ids: %s", ret_vals)
log.debug("(find_events_extended) UNS found the following relevant events: %s", events)
if limit > 0:
return events[:limit]
#todo implement time ordering: ascending or descending
return events
def publish_event_object(self, event=None):
"""
This service operation would publish the given event from an event object.
@param event !Event
@retval event !Event
"""
event = self.event_publisher.publish_event_object(event_object=event)
log.info("The publish_event_object(event) method of UNS was used to publish the event: %s", event )
return event
def publish_event(self, event_type='', origin='', origin_type='', sub_type='', description='', event_attrs=None):
"""
This service operation assembles a new Event object based on event_type
(e.g. via the pyon Event publisher) with optional additional attributes from a event_attrs
dict of arbitrary attributes.
@param event_type str
@param origin str
@param origin_type str
@param sub_type str
@param description str
@param event_attrs dict
@retval event !Event
"""
event_attrs = event_attrs or {}
event = self.event_publisher.publish_event(
event_type = event_type,
origin = origin,
origin_type = origin_type,
sub_type = sub_type,
description = description,
**event_attrs
)
log.info("The publish_event() method of UNS was used to publish an event: %s", event)
return event
def get_recent_events(self, resource_id='', limit = 100):
"""
Get recent events for use in extended resource computed attribute
@param resource_id str
@param limit int
@retval ComputedListValue with value list of 4-tuple with Event objects
"""
now = get_ion_ts()
events = self.find_events(origin=resource_id, limit=limit, max_datetime=now, descending=True)
ret = IonObject(OT.ComputedEventListValue)
if events:
ret.value = events
ret.computed_list = [self._get_event_computed_attributes(event) for event in events]
ret.status = ComputedValueAvailability.PROVIDED
else:
ret.status = ComputedValueAvailability.NOTAVAILABLE
return ret
def _get_event_computed_attributes(self, event):
"""
@param event any Event to compute attributes for
@retval an EventComputedAttributes object for given event
"""
evt_computed = IonObject(OT.EventComputedAttributes)
evt_computed.event_id = event._id
evt_computed.ts_computed = get_ion_ts()
try:
summary = self._get_event_summary(event)
evt_computed.event_summary = summary
spc_attrs = ["%s:%s" % (k, str(getattr(event, k))[:50]) for k in sorted(event.__dict__.keys()) if k not in ['_id', '_rev', 'type_', 'origin', 'origin_type', 'ts_created', 'base_types']]
evt_computed.special_attributes = ", ".join(spc_attrs)
evt_computed.event_attributes_formatted = pprint.pformat(event.__dict__)
except Exception as ex:
log.exception("Error computing EventComputedAttributes for event %s" % event)
return evt_computed
def _get_event_summary(self, event):
event_types = [event.type_] + event.base_types
summary = ""
if "ResourceLifecycleEvent" in event_types:
summary = "%s lifecycle state change: %s_%s" % (event.origin_type, event.lcstate, event.availability)
elif "ResourceModifiedEvent" in event_types:
summary = "%s modified: %s" % (event.origin_type, event.sub_type)
elif "ResourceIssueReportedEvent" in event_types:
summary = "Issue created: %s" % (event.description)
elif "ResourceAgentStateEvent" in event_types:
summary = "%s agent state change: %s" % (event.origin_type, event.state)
elif "ResourceAgentResourceStateEvent" in event_types:
summary = "%s agent resource state change: %s" % (event.origin_type, event.state)
elif "ResourceAgentConfigEvent" in event_types:
summary = "%s agent config set: %s" % (event.origin_type, event.config)
elif "ResourceAgentResourceConfigEvent" in event_types:
summary = "%s agent resource config set: %s" % (event.origin_type, event.config)
elif "ResourceAgentCommandEvent" in event_types:
summary = "%s agent command '%s(%s)' succeeded: %s" % (event.origin_type, event.command, event.execute_command, "" if event.result is None else event.result)
elif "ResourceAgentErrorEvent" in event_types:
summary = "%s agent command '%s(%s)' failed: %s:%s (%s)" % (event.origin_type, event.command, event.execute_command, event.error_type, event.error_msg, event.error_code)
elif "ResourceAgentAsyncResultEvent" in event_types:
summary = "%s agent async command '%s(%s)' succeeded: %s" % (event.origin_type, event.command, event.desc, "" if event.result is None else event.result)
elif "ResourceAgentResourceCommandEvent" in event_types:
summary = "%s agent resource command '%s(%s)' executed: %s" % (event.origin_type, event.command, event.execute_command, "OK" if event.result is None else event.result)
elif "DeviceStatusEvent" in event_types:
summary = "%s '%s' status change: %s" % (event.origin_type, event.sub_type, DeviceStatusType._str_map.get(event.status,"???"))
elif "DeviceOperatorEvent" in event_types or "ResourceOperatorEvent" in event_types:
summary = "Operator entered: %s" % event.description
elif "OrgMembershipGrantedEvent" in event_types:
summary = "Joined Org '%s' as member" % (event.org_name)
elif "OrgMembershipCancelledEvent" in event_types:
summary = "Cancelled Org '%s' membership" % (event.org_name)
elif "UserRoleGrantedEvent" in event_types:
summary = "Granted %s in Org '%s'" % (event.role_name, event.org_name)
elif "UserRoleRevokedEvent" in event_types:
summary = "Revoked %s in Org '%s'" % (event.role_name, event.org_name)
elif "ResourceSharedEvent" in event_types:
summary = "%s shared in Org: '%s'" % (event.sub_type, event.org_name)
elif "ResourceUnsharedEvent" in event_types:
summary = "%s unshared in Org: '%s'" % (event.sub_type, event.org_name)
elif "ResourceCommitmentCreatedEvent" in event_types:
summary = "%s commitment created in Org: '%s'" % (event.commitment_type, event.org_name)
elif "ResourceCommitmentReleasedEvent" in event_types:
summary = "%s commitment released in Org: '%s'" % (event.commitment_type, event.org_name)
# if event.description and summary:
# summary = summary + ". " + event.description
# elif event.description:
# summary = event.description
return summary
def get_user_notifications(self, user_info_id=''):
"""
Get the notification request objects that are subscribed to by the user
@param user_info_id str
@retval notifications list of NotificationRequest objects
"""
if self.user_info.has_key(user_info_id):
notifications = self.user_info[user_info_id]['notifications']
log.debug("Got %s notifications, for the user: %s", len(notifications), user_info_id)
for notif in notifications:
# remove notifications that have expired
if notif.temporal_bounds.end_datetime != '':
log.debug("removing notification: %s", notif)
notifications.remove(notif)
return notifications
# ret = IonObject(OT.ComputedListValue)
#
# if notifications:
# ret.value = notifications
# ret.status = ComputedValueAvailability.PROVIDED
# else:
# ret.status = ComputedValueAvailability.NOTAVAILABLE
# return ret
# else:
# return None
def create_worker(self, number_of_workers=1):
"""
Creates notification workers
@param number_of_workers int
@retval pids list
"""
pids = []
for n in xrange(number_of_workers):
process_definition = ProcessDefinition( name='notification_worker_%s' % n)
process_definition.executable = {
'module': 'ion.processes.data.transforms.notification_worker',
'class':'NotificationWorker'
}
process_definition_id = self.process_dispatcher.create_process_definition(process_definition=process_definition)
# ------------------------------------------------------------------------------------
# Process Spawning
# ------------------------------------------------------------------------------------
pid2 = self.process_dispatcher.create_process(process_definition_id)
#@todo put in a configuration
configuration = {}
configuration['process'] = dict({
'name': 'notification_worker_%s' % n,
'type':'simple',
'queue_name': 'notification_worker_queue'
})
pid = self.process_dispatcher.schedule_process(
process_definition_id,
configuration = configuration,
process_id=pid2
)
pids.append(pid)
return pids
def process_batch(self, start_time = '', end_time = ''):
"""
This method is launched when an process_batch event is received. The user info dictionary maintained
by the User Notification Service is used to query the event repository for all events for a particular
user that have occurred in a provided time interval, and then an email is sent to the user containing
the digest of all the events.
@param start_time int milliseconds
@param end_time int milliseconds
"""
self.smtp_client = setting_up_smtp_client()
if end_time <= start_time:
return
for user_id, value in self.user_info.iteritems():
notifications = value['notifications']
notifications_disabled = value['notifications_disabled']
notifications_daily_digest = value['notifications_daily_digest']
# Ignore users who do NOT want batch notifications or who have disabled the delivery switch
# However, if notification preferences have not been set for the user, use the default mechanism and do not bother
if notifications_disabled or not notifications_daily_digest:
continue
events_for_message = []
search_time = "SEARCH 'ts_created' VALUES FROM %s TO %s FROM 'events_index'" % (start_time, end_time)
for notification in notifications:
# If the notification request has expired, then do not use it in the search
if notification.temporal_bounds.end_datetime:
continue
if notification.origin:
search_origin = 'search "origin" is "%s" from "events_index"' % notification.origin
else:
search_origin = 'search "origin" is "*" from "events_index"'
if notification.origin_type:
search_origin_type= 'search "origin_type" is "%s" from "events_index"' % notification.origin_type
else:
search_origin_type= 'search "origin_type" is "*" from "events_index"'
if notification.event_type:
search_event_type = 'search "type_" is "%s" from "events_index"' % notification.event_type
else:
search_event_type = 'search "type_" is "*" from "events_index"'
search_string = search_time + ' and ' + search_origin + ' and ' + search_origin_type + ' and ' + search_event_type
# get the list of ids corresponding to the events
log.debug('process_batch search_string: %s', search_string)
ret_vals = self.discovery.parse(search_string)
events_for_message.extend(self.datastore.read_mult(ret_vals))
log.debug("Found following events of interest to user, %s: %s", user_id, events_for_message)
# send a notification email to each user using a _send_email() method
if events_for_message:
self.format_and_send_email(events_for_message = events_for_message,
user_id = user_id,
smtp_client=self.smtp_client)
self.smtp_client.quit()
def format_and_send_email(self, events_for_message = None, user_id = None, smtp_client = None):
"""
Format the message for a particular user containing information about the events he is to be notified about
@param events_for_message list
@param user_id str
"""
message = str(events_for_message)
log.debug("The user, %s, will get the following events in his batch notification email: %s", user_id, message)
msg_body = ''
count = 1
for event in events_for_message:
ts_created = _convert_to_human_readable(event.ts_created)
msg_body += string.join(("\r\n",
"Event %s: %s" % (count, event),
"",
"Originator: %s" % event.origin,
"",
"Description: %s" % event.description or "Not provided",
"",
"ts_created: %s" % ts_created,
"\r\n",
"------------------------"
"\r\n"))
count += 1
msg_body += "You received this notification from ION because you asked to be " +\
"notified about this event from this source. " +\
"To modify or remove notifications about this event, " +\
"please access My Notifications Settings in the ION Web UI. " +\
"Do not reply to this email. This email address is not monitored " +\
"and the emails will not be read. \r\n "
log.debug("The email has the following message body: %s", msg_body)
msg_subject = "(SysName: " + get_sys_name() + ") ION event "
self.send_batch_email( msg_body = msg_body,
msg_subject = msg_subject,
msg_recipient=self.user_info[user_id]['user_contact'].email,
smtp_client=smtp_client )
def send_batch_email(self, msg_body = None, msg_subject = None, msg_recipient = None, smtp_client = None):
"""
Send the email
@param msg_body str
@param msg_subject str
@param msg_recipient str
@param smtp_client object
"""
msg = MIMEText(msg_body)
msg['Subject'] = msg_subject
msg['From'] = self.ION_NOTIFICATION_EMAIL_ADDRESS
msg['To'] = msg_recipient
log.debug("UNS sending batch (digest) email from %s to %s" , self.ION_NOTIFICATION_EMAIL_ADDRESS, msg_recipient)
smtp_sender = CFG.get_safe('server.smtp.sender')
smtp_client.sendmail(smtp_sender, [msg_recipient], msg.as_string())
def update_user_info_object(self, user_id, new_notification):
"""
Update the UserInfo object. If the passed in parameter, od_notification, is None, it does not need to remove the old notification
@param user_id str
@param new_notification NotificationRequest
@param old_notification NotificationRequest
"""
#------------------------------------------------------------------------------------
# read the user
#------------------------------------------------------------------------------------
user = self.clients.resource_registry.read(user_id)
if not user:
raise BadRequest("No user with the provided user_id: %s" % user_id)
for item in user.variables:
if type(item) is dict and item.has_key('name') and item['name'] == 'notifications':
for notif in item['value']:
if notif._id == new_notification._id:
log.debug("came here for updating notification")
notifications = item['value']
notifications.remove(notif)
notifications.append(new_notification)
break
else:
log.warning('Invalid variables attribute on UserInfo instance. UserInfo: %s', user)
#------------------------------------------------------------------------------------
# update the resource registry
#------------------------------------------------------------------------------------
log.debug("user.variables::: %s", user.variables)
self.clients.resource_registry.update(user)
return user
def _get_subscriptions(self, resource_id='', include_nonactive=False):
"""
This method is used to get the subscriptions to a data product. The method will return a list of NotificationRequest
objects for whom the origin is set to this data product. This way all the users who were interested in listening to
events with origin equal to this data product, will be known and all their subscriptions will be known.
@param resource_id
@param include_nonactive
@return notification_requests []
"""
search_origin = 'search "origin" is "%s" from "resources_index"' % resource_id
ret_vals = self.discovery.parse(search_origin)
log.debug("Using discovery with search_string: %s", search_origin)
log.debug("_get_subscriptions() got ret_vals: %s", ret_vals )
notifications_all = set()
notifications_active = set()
object_ids = []
for item in ret_vals:
if item['_type'] == 'NotificationRequest':
object_ids.append(item['_id'])
notifs = self.clients.resource_registry.read_mult(object_ids)
log.debug("Got %s notifications here. But they include both active and past notifications", len(notifs))
if include_nonactive:
# Add active or retired notification
notifications_all.update(notifs)
else:
for notif in notifs:
log.debug("Got the end_datetime here: notif.temporal_bounds.end_datetime = %s", notif.temporal_bounds.end_datetime)
if notif.temporal_bounds.end_datetime == '':
log.debug("removing the notification: %s", notif._id)
# Add the active notification
notifications_active.add(notif)
if include_nonactive:
return list(notifications_all)
else:
return list(notifications_active)
def get_subscriptions(self, resource_id='', user_id = '', include_nonactive=False):
"""
This method takes the user-id as an input parameter. The logic will first find all notification requests for this resource
then if a user_id is present, it will filter on those that this user is associated with.
"""
# Get the notifications whose origin field has the provided resource_id
notifs = self._get_subscriptions(resource_id=resource_id, include_nonactive=include_nonactive)
log.debug("For include_nonactive= %s, UNS fetched the following the notifications subscribed to the resource_id: %s --> %s. "
"They are %s in number", include_nonactive,resource_id, notifs, len(notifs))
if not user_id:
return notifs
notifications = []
# Now find the users who subscribed to the above notifications
#todo Right now looking at assocs in a loop which is not efficient to find the users linked to these notifications
# todo(contd) Need to use a more efficient way later
for notif in notifs:
notif_id = notif._id
# Find if the user is associated with this notification request
ids, _ = self.clients.resource_registry.find_subjects( subject_type = RT.UserInfo, object=notif_id, predicate=PRED.hasNotification, id_only=True)
log.debug("Got the following users: %s, associated with the notification: %s", ids, notif_id)
if ids and user_id in ids:
notifications.append(notif)
log.debug("For include_nonactive = %s, UNS fetched the following %s notifications subscribed to %s --> %s", include_nonactive,len(notifications),user_id, notifications)
return notifications
def get_subscriptions_attribute(self, resource_id='', user_id = '', include_nonactive=False):
retval = self.get_subscriptions(resource_id=resource_id, user_id=user_id, include_nonactive=include_nonactive)
container = ComputedListValue(value=retval)
return container
# def get_users_who_subscribed(self, resource_id='', include_nonactive=False):
#
# # Get the notifications whose origin field has the provided resource_id
# notifications = self.get_subscriptions(resource_id, include_nonactive)
#
# # Now find the users who subscribed to the above notifications
# #todo Right now looking at assocs in a loop which is not efficient to find the users linked to these notifications
# # todo(contd) Need to use a more efficient way later
#
# user_ids = set()
# for notif in notifications:
# notif_id = notif._id
# # Find the users who are associated with this notification request
# ids, _ = self.clients.resource_registry.find_subjects( subject_type = RT.UserInfo, object=notif_id, predicate=PRED.hasNotification, id_only=True)
# user_ids.add(ids)
#
# return user_ids
def _notification_in_notifications(self, notification = None, notifications = None):
for id, notif in notifications.iteritems():
if notif.name == notification.name and \
notif.origin == notification.origin and \
notif.origin_type == notification.origin_type and \
notif.event_type == notification.event_type:
return id
return None
def _update_notification_in_notifications_dict(self, new_notification = None, notifications = None ):
for id, notif in notifications.iteritems():
if id == new_notification._id:
notifications.pop(id)
notifications[id] = new_notification
break
def load_user_info(self):
'''
Method to load the user info dictionary used by the notification workers and the UNS
@retval user_info dict
'''
users, _ = self.clients.resource_registry.find_resources(restype= RT.UserInfo)
user_info = {}
if not users:
return {}
for user in users:
notifications = []
notifications_disabled = False
notifications_daily_digest = False
for variable in user.variables:
if type(variable) is dict and variable.has_key('name'):
if variable['name'] == 'notifications':
notifications = variable['value']
if variable['name'] == 'notifications_daily_digest':
notifications_daily_digest = variable['value']
if variable['name'] == 'notifications_disabled':
notifications_disabled = variable['value']
else:
log.warning('Invalid variables attribute on UserInfo instance. UserInfo: %s', user)
user_info[user._id] = { 'user_contact' : user.contact, 'notifications' : notifications,
'notifications_daily_digest' : notifications_daily_digest, 'notifications_disabled' : notifications_disabled}
return user_info
class UserNotificationService(BaseUserNotificationService):
"""
A service that provides users with an API for CRUD methods for notifications.
"""
def __init__(self, *args, **kwargs):
self._schedule_ids = []
BaseUserNotificationService.__init__(self, *args, **kwargs)
def on_start(self):
self.ION_NOTIFICATION_EMAIL_ADDRESS = CFG.get_safe('server.smtp.sender')
# Create an event processor
self.event_processor = EmailEventProcessor()
# Dictionaries that maintain information asetting_up_smtp_clientbout users and their subscribed notifications
self.user_info = {}
# The reverse_user_info is calculated from the user_info dictionary
self.reverse_user_info = {}
# Get the clients
# @TODO: Why are these not dependencies in the service YML???
self.discovery = DiscoveryServiceClient()
self.process_dispatcher = ProcessDispatcherServiceClient()
self.event_publisher = EventPublisher()
self.datastore = self.container.datastore_manager.get_datastore('events')
self.start_time = get_ion_ts()
#------------------------------------------------------------------------------------
# Create an event subscriber for Reload User Info events
#------------------------------------------------------------------------------------
def reload_user_info(event_msg, headers):
"""
Callback method for the subscriber to ReloadUserInfoEvent
"""
notification_id = event_msg.notification_id
log.debug("(UNS instance received a ReloadNotificationEvent. The relevant notification_id is %s" % notification_id)
try:
self.user_info = self.load_user_info()
except NotFound:
log.warning("ElasticSearch has not yet loaded the user_index.")
self.reverse_user_info = calculate_reverse_user_info(self.user_info)
log.debug("(UNS instance) After a reload, the user_info: %s" % self.user_info)
log.debug("(UNS instance) The recalculated reverse_user_info: %s" % self.reverse_user_info)
# the subscriber for the ReloadUSerInfoEvent
self.reload_user_info_subscriber = EventSubscriber(
event_type=OT.ReloadUserInfoEvent,
origin='UserNotificationService',
callback=reload_user_info
)
self.add_endpoint(self.reload_user_info_subscriber)
def on_quit(self):
"""
Handles stop/terminate.
Cleans up subscribers spawned here, terminates any scheduled tasks to the scheduler.
"""
for sid in self._schedule_ids:
try:
self.clients.scheduler.cancel_timer(sid)
except IonException as ex:
log.info("Ignoring exception while cancelling schedule id (%s): %s: %s", sid, ex.__class__.__name__, ex)
super(UserNotificationService, self).on_quit()
def set_process_batch_key(self, process_batch_key = ''):
"""
This method allows an operator to set the process_batch_key, a string.
Once this method is used by the operator, the UNS will start listening for timer events
published by the scheduler with origin = process_batch_key.
@param process_batch_key str
"""
def process(event_msg, headers):
self.end_time = get_ion_ts()
# run the process_batch() method
self.process_batch(start_time=self.start_time, end_time=self.end_time)
self.start_time = self.end_time
# the subscriber for the batch processing
# To trigger the batch notification, have the scheduler create a timer with event_origin = process_batch_key
self.batch_processing_subscriber = EventSubscriber(
event_type=OT.TimerEvent,
origin=process_batch_key,
callback=process
)
self.add_endpoint(self.batch_processing_subscriber)
def create_notification(self, notification=None, user_id=''):
"""
Persists the provided NotificationRequest object for the specified Origin id.
Associate the Notification resource with the user_id string.
returned id is the internal id by which NotificationRequest will be identified
in the data store.
@param notification NotificationRequest
@param user_id str
@retval notification_id str
@throws BadRequest if object passed has _id or _rev attribute
"""
if not user_id:
raise BadRequest("User id not provided.")
log.debug("Create notification called for user_id: %s, and notification: %s", user_id, notification)
#---------------------------------------------------------------------------------------------------
# Persist Notification object as a resource if it has already not been persisted
#---------------------------------------------------------------------------------------------------
notification_id = None
# if the notification has already been registered, simply use the old id
existing_user_notifications = self.get_user_notifications(user_info_id=user_id)
if existing_user_notifications:
notification_id = self._notification_in_notifications(notification, existing_user_notifications)
# since the notification has not been registered yet, register it and get the id
temporal_bounds = TemporalBounds()
temporal_bounds.start_datetime = get_ion_ts()
temporal_bounds.end_datetime = ''
if not notification_id:
notification.temporal_bounds = temporal_bounds
notification_id, rev = self.clients.resource_registry.create(notification)
else:
log.debug("Notification object has already been created in resource registry before. No new id to be generated. notification_id: %s", notification_id)
# Read the old notification already in the resource registry
notification = self.clients.resource_registry.read(notification_id)
# Update the temporal bounds of the old notification resource
notification.temporal_bounds = temporal_bounds
# Update the notification in the resource registry
self.clients.resource_registry.update(notification)
log.debug("The temporal bounds for this resubscribed notification object with id: %s, is: %s", notification._id,notification.temporal_bounds)
# Link the user and the notification with a hasNotification association
assocs= self.clients.resource_registry.find_associations(subject=user_id,
predicate=PRED.hasNotification,
object=notification_id,
id_only=True)
if assocs:
log.debug("Got an already existing association: %s, between user_id: %s, and notification_id: %s", assocs,user_id,notification_id)
return notification_id
else:
log.debug("Creating association between user_id: %s, and notification_id: %s", user_id, notification_id )
self.clients.resource_registry.create_association(user_id, PRED.hasNotification, notification_id)
# read the registered notification request object because this has an _id and is more useful
notification = self.clients.resource_registry.read(notification_id)
#-------------------------------------------------------------------------------------------------------------------
# Generate an event that can be picked by a notification worker so that it can update its user_info dictionary
#-------------------------------------------------------------------------------------------------------------------
log.debug("(create notification) Publishing ReloadUserInfoEvent for notification_id: %s", notification_id)
self.event_publisher.publish_event( event_type= OT.ReloadUserInfoEvent,
origin="UserNotificationService",
description= "A notification has been created.",
notification_id = notification_id)
return notification_id
def update_notification(self, notification=None, user_id = ''):
"""Updates the provided NotificationRequest object. Throws NotFound exception if
an existing version of NotificationRequest is not found. Throws Conflict if
the provided NotificationRequest object is not based on the latest persisted
version of the object.
@param notification NotificationRequest
@throws BadRequest if object does not have _id or _rev attribute
@throws NotFound object with specified id does not exist
@throws Conflict object not based on latest persisted object version
"""
raise NotImplementedError("This method needs to be worked out in terms of implementation")
# #-------------------------------------------------------------------------------------------------------------------
# # Get the old notification
# #-------------------------------------------------------------------------------------------------------------------
#
# old_notification = self.clients.resource_registry.read(notification._id)
#
# #-------------------------------------------------------------------------------------------------------------------
# # Update the notification in the notifications dict
# #-------------------------------------------------------------------------------------------------------------------
#
#
# self._update_notification_in_notifications_dict(new_notification=notification,
# notifications=self.notifications)
# #-------------------------------------------------------------------------------------------------------------------
# # Update the notification in the registry
# #-------------------------------------------------------------------------------------------------------------------
# '''
# Since one user should not be able to update the notification request resource without the knowledge of other users
# who have subscribed to the same notification request, we do not update the resource in the resource registry
# '''
#
## self.clients.resource_registry.update(notification)
#
# #-------------------------------------------------------------------------------------------------------------------
# # reading up the notification object to make sure we have the newly registered notification request object
# #-------------------------------------------------------------------------------------------------------------------
#
# notification_id = notification._id
# notification = self.clients.resource_registry.read(notification_id)
#
# #------------------------------------------------------------------------------------
# # Update the UserInfo object
# #------------------------------------------------------------------------------------
#
# user = self.update_user_info_object(user_id, notification)
#
# #-------------------------------------------------------------------------------------------------------------------
# # Generate an event that can be picked by notification workers so that they can update their user_info dictionary
# #-------------------------------------------------------------------------------------------------------------------
# log.info("(update notification) Publishing ReloadUserInfoEvent for updated notification")
#
# self.event_publisher.publish_event( event_type= "ReloadUserInfoEvent",
# origin="UserNotificationService",
# description= "A notification has been updated.",
# notification_id = notification_id
# )
def read_notification(self, notification_id=''):
"""Returns the NotificationRequest object for the specified notification id.
Throws exception if id does not match any persisted NotificationRequest
objects.
@param notification_id str
@retval notification NotificationRequest
@throws NotFound object with specified id does not exist
"""
notification = self.clients.resource_registry.read(notification_id)
return notification
def delete_notification(self, notification_id=''):
"""For now, permanently deletes NotificationRequest object with the specified
id. Throws exception if id does not match any persisted NotificationRequest.
@param notification_id str
@throws NotFound object with specified id does not exist
"""
#-------------------------------------------------------------------------------------------------------------------
# Stop the event subscriber for the notification
#-------------------------------------------------------------------------------------------------------------------
notification_request = self.clients.resource_registry.read(notification_id)
#-------------------------------------------------------------------------------------------------------------------
# Update the resource registry
#-------------------------------------------------------------------------------------------------------------------
notification_request.temporal_bounds.end_datetime = get_ion_ts()
self.clients.resource_registry.update(notification_request)
#-------------------------------------------------------------------------------------------------------------------
# Find users who are interested in the notification and update the notification in the list maintained by the UserInfo object
#-------------------------------------------------------------------------------------------------------------------
# user_ids, _ = self.clients.resource_registry.find_subjects(RT.UserInfo, PRED.hasNotification, notification_id, True)
#
# for user_id in user_ids:
# self.update_user_info_object(user_id, notification_request)
#-------------------------------------------------------------------------------------------------------------------
# Generate an event that can be picked by a notification worker so that it can update its user_info dictionary
#-------------------------------------------------------------------------------------------------------------------
log.info("(delete notification) Publishing ReloadUserInfoEvent for notification_id: %s", notification_id)
self.event_publisher.publish_event( event_type= OT.ReloadUserInfoEvent,
origin="UserNotificationService",
description= "A notification has been deleted.",
notification_id = notification_id)
# def delete_notification_from_user_info(self, notification_id):
# """
# Helper method to delete the notification from the user_info dictionary
#
# @param notification_id str
# """
#
# user_ids, assocs = self.clients.resource_registry.find_subjects(object=notification_id, predicate=PRED.hasNotification, id_only=True)
#
# for assoc in assocs:
# self.clients.resource_registry.delete_association(assoc)
#
# for user_id in user_ids:
#
# value = self.user_info[user_id]
#
# for notif in value['notifications']:
# if notification_id == notif._id:
# # remove the notification
# value['notifications'].remove(notif)
#
# self.reverse_user_info = calculate_reverse_user_info(self.user_info)
def find_events(self, origin='', type='', min_datetime=0, max_datetime=0, limit=-1, descending=False):
"""
This method leverages couchdb view and simple filters. It does not use elastic search.
Returns a list of events that match the specified search criteria. Will throw a not NotFound exception
if no events exist for the given parameters.
@param origin str
@param min_datetime int seconds
@param max_datetime int seconds
@param limit int (integer limiting the number of results (0 means unlimited))
@param descending boolean (if True, reverse order (of production time) is applied, e.g. most recent first)
@retval event_list []
@throws NotFound object with specified parameters does not exist
@throws NotFound object with specified parameters does not exist
"""
event_tuples = []
try:
event_tuples = self.container.event_repository.find_events(event_type=type, origin=origin, start_ts=min_datetime, end_ts=max_datetime, limit=limit, descending=descending)
except Exception as exc:
log.warning("The UNS find_events operation for event origin = %s and type = %s failed. Error message = %s", origin, type, exc.message)
events = [item[2] for item in event_tuples]
log.debug("(find_events) UNS found the following relevant events: %s", events)
return events
#todo Uses Elastic Search. Later extend this to a larger search criteria
def find_events_extended(self, origin='', type='', min_time= 0, max_time=0, limit=-1, descending=False):
"""Uses Elastic Search. Returns a list of events that match the specified search criteria. Will throw a not NotFound exception
if no events exist for the given parameters.
@param origin str
@param type str
@param min_time int seconds
@param max_time int seconds
@param limit int (integer limiting the number of results (0 means unlimited))
@param descending boolean (if True, reverse order (of production time) is applied, e.g. most recent first)
@retval event_list []
@throws NotFound object with specified parameters does not exist
@throws NotFound object with specified parameters does not exist
"""
query = []
if min_time and max_time:
query.append( "SEARCH 'ts_created' VALUES FROM %s TO %s FROM 'events_index'" % (min_time, max_time))
if origin:
query.append( 'search "origin" is "%s" from "events_index"' % origin)
if type:
query.append( 'search "type_" is "%s" from "events_index"' % type)
search_string = ' and '.join(query)
# get the list of ids corresponding to the events
ret_vals = self.discovery.parse(search_string)
if len(query) > 1:
events = self.datastore.read_mult(ret_vals)
else:
events = [i['_source'] for i in ret_vals]
log.debug("(find_events_extended) Discovery search returned the following event ids: %s", ret_vals)
log.debug("(find_events_extended) UNS found the following relevant events: %s", events)
if limit > 0:
return events[:limit]
#todo implement time ordering: ascending or descending
return events
def publish_event_object(self, event=None):
"""
This service operation would publish the given event from an event object.
@param event !Event
@retval event !Event
"""
event = self.event_publisher.publish_event_object(event_object=event)
log.info("The publish_event_object(event) method of UNS was used to publish the event: %s", event )
return event
def publish_event(self, event_type='', origin='', origin_type='', sub_type='', description='', event_attrs=None):
"""
This service operation assembles a new Event object based on event_type
(e.g. via the pyon Event publisher) with optional additional attributes from a event_attrs
dict of arbitrary attributes.
@param event_type str
@param origin str
@param origin_type str
@param sub_type str
@param description str
@param event_attrs dict
@retval event !Event
"""
event_attrs = event_attrs or {}
event = self.event_publisher.publish_event(
event_type = event_type,
origin = origin,
origin_type = origin_type,
sub_type = sub_type,
description = description,
**event_attrs
)
log.info("The publish_event() method of UNS was used to publish an event: %s", event)
return event
def get_recent_events(self, resource_id='', limit=100):
"""
Get recent events for use in extended resource computed attribute
@param resource_id str
@param limit int
@retval ComputedListValue with value list of 4-tuple with Event objects
"""
now = get_ion_ts()
events = self.find_events(origin=resource_id, limit=limit, max_datetime=now, descending=True)
ret = IonObject(OT.ComputedEventListValue)
if events:
ret.value = events
ret.computed_list = [get_event_computed_attributes(event) for event in events]
ret.status = ComputedValueAvailability.PROVIDED
else:
ret.status = ComputedValueAvailability.NOTAVAILABLE
return ret
def get_user_notifications(self, user_info_id=''):
"""
Get the notification request objects that are subscribed to by the user
@param user_info_id str
@retval notifications list of NotificationRequest objects
"""
notifications = []
user_notif_req_objs, _ = self.clients.resource_registry.find_objects(
subject=user_info_id, predicate=PRED.hasNotification, object_type=RT.NotificationRequest, id_only=False)
log.debug("Got %s notifications, for the user: %s", len(user_notif_req_objs), user_info_id)
for notif in user_notif_req_objs:
# do not include notifications that have expired
if notif.temporal_bounds.end_datetime == '':
notifications.append(notif)
return notifications
def create_worker(self, number_of_workers=1):
"""
Creates notification workers
@param number_of_workers int
@retval pids list
"""
pids = []
for n in xrange(number_of_workers):
process_definition = ProcessDefinition( name='notification_worker_%s' % n)
process_definition.executable = {
'module': 'ion.processes.data.transforms.notification_worker',
'class':'NotificationWorker'
}
process_definition_id = self.process_dispatcher.create_process_definition(process_definition=process_definition)
# ------------------------------------------------------------------------------------
# Process Spawning
# ------------------------------------------------------------------------------------
pid2 = self.process_dispatcher.create_process(process_definition_id)
#@todo put in a configuration
configuration = {}
configuration['process'] = dict({
'name': 'notification_worker_%s' % n,
'type':'simple',
'queue_name': 'notification_worker_queue'
})
pid = self.process_dispatcher.schedule_process(
process_definition_id,
configuration = configuration,
process_id=pid2
)
pids.append(pid)
return pids
def process_batch(self, start_time = '', end_time = ''):
"""
This method is launched when an process_batch event is received. The user info dictionary maintained
by the User Notification Service is used to query the event repository for all events for a particular
user that have occurred in a provided time interval, and then an email is sent to the user containing
the digest of all the events.
@param start_time int milliseconds
@param end_time int milliseconds
"""
self.smtp_client = setting_up_smtp_client()
if end_time <= start_time:
return
for user_id, value in self.user_info.iteritems():
notifications = self.get_user_notifications(user_info_id=user_id)
notifications_disabled = value['notifications_disabled']
notifications_daily_digest = value['notifications_daily_digest']
# Ignore users who do NOT want batch notifications or who have disabled the delivery switch
# However, if notification preferences have not been set for the user, use the default mechanism and do not bother
if notifications_disabled or not notifications_daily_digest:
continue
events_for_message = []
search_time = "SEARCH 'ts_created' VALUES FROM %s TO %s FROM 'events_index'" % (start_time, end_time)
for notification in notifications:
# If the notification request has expired, then do not use it in the search
if notification.temporal_bounds.end_datetime:
continue
if CFG_ELASTIC_SEARCH:
if notification.origin:
search_origin = 'search "origin" is "%s" from "events_index"' % notification.origin
else:
search_origin = 'search "origin" is "*" from "events_index"'
if notification.origin_type:
search_origin_type= 'search "origin_type" is "%s" from "events_index"' % notification.origin_type
else:
search_origin_type= 'search "origin_type" is "*" from "events_index"'
if notification.event_type:
search_event_type = 'search "type_" is "%s" from "events_index"' % notification.event_type
else:
search_event_type = 'search "type_" is "*" from "events_index"'
search_string = search_time + ' and ' + search_origin + ' and ' + search_origin_type + ' and ' + search_event_type
# get the list of ids corresponding to the events
log.debug('process_batch search_string: %s', search_string)
ret_vals = self.discovery.parse(search_string)
events_for_message.extend(self.datastore.read_mult(ret_vals))
else:
# Adding a branch
event_tuples = self.container.event_repository.find_events(
origin=notification.origin,
event_type=notification.event_type,
start_ts=start_time,
end_ts=end_time)
events = [item[2] for item in event_tuples]
events_for_message.extend(events)
log.debug("Found following events of interest to user, %s: %s", user_id, events_for_message)
# send a notification email to each user using a _send_email() method
if events_for_message:
self.format_and_send_email(events_for_message = events_for_message,
user_id = user_id,
smtp_client=self.smtp_client)
self.smtp_client.quit()
def format_and_send_email(self, events_for_message=None, user_id=None, smtp_client=None):
"""
Format the message for a particular user containing information about the events he is to be notified about
@param events_for_message list
@param user_id str
"""
message = str(events_for_message)
log.debug("The user, %s, will get the following events in his batch notification email: %s", user_id, message)
msg = convert_events_to_email_message(events_for_message, self.clients.resource_registry)
msg["Subject"] = "(SysName: " + get_sys_name() + ") ION event "
msg["To"] = self.user_info[user_id]['user_contact'].email
self.send_batch_email(msg, smtp_client)
def send_batch_email(self, msg=None, smtp_client=None):
"""
Send the email
@param msg MIMEText object of email message
@param smtp_client object
"""
if msg is None: msg = {}
for f in ["Subject", "To"]:
if not f in msg: raise BadRequest("'%s' not in msg %s" % (f, msg))
msg_subject = msg["Subject"]
msg_recipient = msg["To"]
msg['From'] = self.ION_NOTIFICATION_EMAIL_ADDRESS
log.debug("UNS sending batch (digest) email from %s to %s",
self.ION_NOTIFICATION_EMAIL_ADDRESS,
msg_recipient)
smtp_sender = CFG.get_safe('server.smtp.sender')
smtp_client.sendmail(smtp_sender, [msg_recipient], msg.as_string())
def update_user_info_object(self, user_id, new_notification):
"""
Update the UserInfo object. If the passed in parameter, od_notification, is None, it does not need to remove the old notification
@param user_id str
@param new_notification NotificationRequest
"""
#this is not necessary if notifiactions are not stored in the userinfo object
raise NotImplementedError("This method is not necessary because Notifications are not stored in the userinfo object")
#------------------------------------------------------------------------------------
# read the user
#------------------------------------------------------------------------------------
# user = self.clients.resource_registry.read(user_id)
#
# if not user:
# raise BadRequest("No user with the provided user_id: %s" % user_id)
#
# for item in user.variables:
# if type(item) is dict and item.has_key('name') and item['name'] == 'notifications':
# for notif in item['value']:
# if notif._id == new_notification._id:
# log.debug("came here for updating notification")
# notifications = item['value']
# notifications.remove(notif)
# notifications.append(new_notification)
# break
# else:
# log.warning('Invalid variables attribute on UserInfo instance. UserInfo: %s', user)
#
#
# #------------------------------------------------------------------------------------
# # update the resource registry
# #------------------------------------------------------------------------------------
#
# log.debug("user.variables::: %s", user.variables)
#
# self.clients.resource_registry.update(user)
#
# return user
def get_subscriptions(self, resource_id='', user_id = '', include_nonactive=False):
"""
@param resource_id a resource id (or other origin) that is the origin of events for notifications
@param user_id a UserInfo ID that owns the NotificationRequest
@param include_nonactive if False, filter to active NotificationRequest only
Return all NotificationRequest resources where origin is given resource_id.
"""
notif_reqs, _ = self.clients.resource_registry.find_resources_ext(
restype=RT.NotificationRequest, attr_name="origin", attr_value=resource_id, id_only=False)
log.debug("Got %s active and past NotificationRequests for resource/origin %s", len(notif_reqs), resource_id)
if not include_nonactive:
notif_reqs = [nr for nr in notif_reqs if nr.temporal_bounds.end_datetime == '']
log.debug("Filtered to %s active NotificationRequests", len(notif_reqs))
if user_id:
# Get all NotificationRequests (ID) that are associated to given UserInfo_id
user_notif_req_ids, _ = self.clients.resource_registry.find_objects(
subject=user_id, predicate=PRED.hasNotification, object_type=RT.NotificationRequest, id_only=True)
notif_reqs = [nr for nr in notif_reqs if nr._id in user_notif_req_ids]
log.debug("Filtered to %s NotificationRequests associated to user %s", len(notif_reqs), user_id)
return notif_reqs
def get_subscriptions_attribute(self, resource_id='', user_id = '', include_nonactive=False):
retval = self.get_subscriptions(resource_id=resource_id, user_id=user_id, include_nonactive=include_nonactive)
container = ComputedListValue(value=retval)
return container
def _notification_in_notifications(self, notification = None, notifications = None):
for notif in notifications:
if notif.name == notification.name and \
notif.origin == notification.origin and \
notif.origin_type == notification.origin_type and \
notif.event_type == notification.event_type:
return notif._id
return None
def load_user_info(self):
"""
Method to load the user info dictionary used by the notification workers and the UNS
@retval user_info dict
"""
users, _ = self.clients.resource_registry.find_resources(restype=RT.UserInfo)
user_info = {}
if not users:
return {}
for user in users:
notifications = []
notifications_disabled = False
notifications_daily_digest = False
#retrieve all the active notifications assoc to this user
notifications = self.get_user_notifications(user_info_id=user)
log.debug('load_user_info notifications: %s', notifications)
for variable in user.variables:
if type(variable) is dict and variable.has_key('name'):
if variable['name'] == 'notifications_daily_digest':
notifications_daily_digest = variable['value']
if variable['name'] == 'notifications_disabled':
notifications_disabled = variable['value']
else:
log.warning('Invalid variables attribute on UserInfo instance. UserInfo: %s', user)
user_info[user._id] = { 'user_contact' : user.contact, 'notifications' : notifications,
'notifications_daily_digest' : notifications_daily_digest, 'notifications_disabled' : notifications_disabled}
return user_info
##
##
## GOVERNANCE FUNCTIONS
##
##
def check_subscription_policy(self, process, message, headers):
try:
gov_values = GovernanceHeaderValues(headers=headers, process=process, resource_id_required=False)
except Inconsistent, ex:
return False, ex.message
if gov_values.op == 'delete_notification':
return True, ''
notification = message['notification']
resource_id = notification.origin
if notification.origin_type == RT.Org:
org = self.clients.resource_registry.read(resource_id)
if (has_org_role(gov_values.actor_roles, org.org_governance_name, [ORG_MEMBER_ROLE])):
return True, ''
else:
orgs,_ = self.clients.resource_registry.find_subjects(subject_type=RT.Org, predicate=PRED.hasResource, object=resource_id, id_only=False)
for org in orgs:
if (has_org_role(gov_values.actor_roles, org.org_governance_name, [ORG_MEMBER_ROLE])):
return True, ''
return False, '%s(%s) has been denied since the user is not a member in any org to which the resource id %s belongs ' % (process.name, gov_values.op, resource_id)
def test_pub_and_sub(self):
ar = event.AsyncResult()
gq = queue.Queue()
self.count = 0
def cb(*args, **kwargs):
self.count += 1
gq.put(args[0])
if self.count == 2:
ar.set()
sub = EventSubscriber(event_type="ResourceEvent",
callback=cb,
origin="specific")
pub = EventPublisher(event_type="ResourceEvent")
self._listen(sub)
pub.publish_event(origin="specific", description="hello")
event_obj = bootstrap.IonObject('ResourceEvent',
origin='specific',
description='more testing')
self.assertEqual(event_obj, pub.publish_event_object(event_obj))
with self.assertRaises(BadRequest) as cm:
event_obj = bootstrap.IonObject('ResourceEvent',
origin='specific',
description='more testing',
ts_created='2423')
pub.publish_event_object(event_obj)
self.assertIn('The ts_created value is not a valid timestamp',
cm.exception.message)
with self.assertRaises(BadRequest) as cm:
event_obj = bootstrap.IonObject('ResourceEvent',
origin='specific',
description='more testing',
ts_created='1000494978462')
pub.publish_event_object(event_obj)
self.assertIn('This ts_created value is too old', cm.exception.message)
with self.assertRaises(BadRequest) as cm:
event_obj = bootstrap.IonObject('ResourceEvent',
origin='specific',
description='more testing')
event_obj._id = '343434'
pub.publish_event_object(event_obj)
self.assertIn('The event object cannot contain a _id field',
cm.exception.message)
ar.get(timeout=5)
res = []
for x in xrange(self.count):
res.append(gq.get(timeout=5))
self.assertEquals(len(res), self.count)
self.assertEquals(res[0].description, "hello")
self.assertAlmostEquals(int(res[0].ts_created),
int(get_ion_ts()),
delta=5000)
self.assertEquals(res[1].description, "more testing")
self.assertAlmostEquals(int(res[1].ts_created),
int(get_ion_ts()),
delta=5000)
class UserNotificationService(BaseUserNotificationService):
"""
A service that provides users with an API for CRUD methods for notifications.
"""
def __init__(self, *args, **kwargs):
self._schedule_ids = []
BaseUserNotificationService.__init__(self, *args, **kwargs)
def on_start(self):
self.ION_NOTIFICATION_EMAIL_ADDRESS = CFG.get_safe(
'server.smtp.sender')
# Create an event processor
self.event_processor = EmailEventProcessor()
# Dictionaries that maintain information asetting_up_smtp_clientbout users and their subscribed notifications
self.user_info = {}
# The reverse_user_info is calculated from the user_info dictionary
self.reverse_user_info = {}
# Get the clients
# @TODO: Why are these not dependencies in the service YML???
self.discovery = DiscoveryServiceClient()
self.process_dispatcher = ProcessDispatcherServiceClient()
self.event_publisher = EventPublisher()
self.datastore = self.container.datastore_manager.get_datastore(
'events')
self.start_time = get_ion_ts()
#------------------------------------------------------------------------------------
# Create an event subscriber for Reload User Info events
#------------------------------------------------------------------------------------
def reload_user_info(event_msg, headers):
"""
Callback method for the subscriber to ReloadUserInfoEvent
"""
notification_id = event_msg.notification_id
log.debug(
"(UNS instance received a ReloadNotificationEvent. The relevant notification_id is %s"
% notification_id)
try:
self.user_info = self.load_user_info()
except NotFound:
log.warning("ElasticSearch has not yet loaded the user_index.")
self.reverse_user_info = calculate_reverse_user_info(
self.user_info)
log.debug("(UNS instance) After a reload, the user_info: %s" %
self.user_info)
log.debug("(UNS instance) The recalculated reverse_user_info: %s" %
self.reverse_user_info)
# the subscriber for the ReloadUSerInfoEvent
self.reload_user_info_subscriber = EventSubscriber(
event_type=OT.ReloadUserInfoEvent,
origin='UserNotificationService',
callback=reload_user_info)
self.add_endpoint(self.reload_user_info_subscriber)
def on_quit(self):
"""
Handles stop/terminate.
Cleans up subscribers spawned here, terminates any scheduled tasks to the scheduler.
"""
for sid in self._schedule_ids:
try:
self.clients.scheduler.cancel_timer(sid)
except IonException as ex:
log.info(
"Ignoring exception while cancelling schedule id (%s): %s: %s",
sid, ex.__class__.__name__, ex)
super(UserNotificationService, self).on_quit()
def set_process_batch_key(self, process_batch_key=''):
"""
This method allows an operator to set the process_batch_key, a string.
Once this method is used by the operator, the UNS will start listening for timer events
published by the scheduler with origin = process_batch_key.
@param process_batch_key str
"""
def process(event_msg, headers):
self.end_time = get_ion_ts()
# run the process_batch() method
self.process_batch(start_time=self.start_time,
end_time=self.end_time)
self.start_time = self.end_time
# the subscriber for the batch processing
# To trigger the batch notification, have the scheduler create a timer with event_origin = process_batch_key
self.batch_processing_subscriber = EventSubscriber(
event_type=OT.TimerEvent,
origin=process_batch_key,
callback=process)
self.add_endpoint(self.batch_processing_subscriber)
def create_notification(self, notification=None, user_id=''):
"""
Persists the provided NotificationRequest object for the specified Origin id.
Associate the Notification resource with the user_id string.
returned id is the internal id by which NotificationRequest will be identified
in the data store.
@param notification NotificationRequest
@param user_id str
@retval notification_id str
@throws BadRequest if object passed has _id or _rev attribute
"""
if not user_id:
raise BadRequest("User id not provided.")
log.debug(
"Create notification called for user_id: %s, and notification: %s",
user_id, notification)
#---------------------------------------------------------------------------------------------------
# Persist Notification object as a resource if it has already not been persisted
#---------------------------------------------------------------------------------------------------
notification_id = None
# if the notification has already been registered, simply use the old id
existing_user_notifications = self.get_user_notifications(
user_info_id=user_id)
if existing_user_notifications:
notification_id = self._notification_in_notifications(
notification, existing_user_notifications)
# since the notification has not been registered yet, register it and get the id
temporal_bounds = TemporalBounds()
temporal_bounds.start_datetime = get_ion_ts()
temporal_bounds.end_datetime = ''
if not notification_id:
notification.temporal_bounds = temporal_bounds
notification_id, rev = self.clients.resource_registry.create(
notification)
else:
log.debug(
"Notification object has already been created in resource registry before. No new id to be generated. notification_id: %s",
notification_id)
# Read the old notification already in the resource registry
notification = self.clients.resource_registry.read(notification_id)
# Update the temporal bounds of the old notification resource
notification.temporal_bounds = temporal_bounds
# Update the notification in the resource registry
self.clients.resource_registry.update(notification)
log.debug(
"The temporal bounds for this resubscribed notification object with id: %s, is: %s",
notification._id, notification.temporal_bounds)
# Link the user and the notification with a hasNotification association
assocs = self.clients.resource_registry.find_associations(
subject=user_id,
predicate=PRED.hasNotification,
object=notification_id,
id_only=True)
if assocs:
log.debug(
"Got an already existing association: %s, between user_id: %s, and notification_id: %s",
assocs, user_id, notification_id)
return notification_id
else:
log.debug(
"Creating association between user_id: %s, and notification_id: %s",
user_id, notification_id)
self.clients.resource_registry.create_association(
user_id, PRED.hasNotification, notification_id)
# read the registered notification request object because this has an _id and is more useful
notification = self.clients.resource_registry.read(notification_id)
#-------------------------------------------------------------------------------------------------------------------
# Generate an event that can be picked by a notification worker so that it can update its user_info dictionary
#-------------------------------------------------------------------------------------------------------------------
log.debug(
"(create notification) Publishing ReloadUserInfoEvent for notification_id: %s",
notification_id)
self.event_publisher.publish_event(
event_type=OT.ReloadUserInfoEvent,
origin="UserNotificationService",
description="A notification has been created.",
notification_id=notification_id)
return notification_id
def update_notification(self, notification=None, user_id=''):
"""Updates the provided NotificationRequest object. Throws NotFound exception if
an existing version of NotificationRequest is not found. Throws Conflict if
the provided NotificationRequest object is not based on the latest persisted
version of the object.
@param notification NotificationRequest
@throws BadRequest if object does not have _id or _rev attribute
@throws NotFound object with specified id does not exist
@throws Conflict object not based on latest persisted object version
"""
raise NotImplementedError(
"This method needs to be worked out in terms of implementation")
# #-------------------------------------------------------------------------------------------------------------------
# # Get the old notification
# #-------------------------------------------------------------------------------------------------------------------
#
# old_notification = self.clients.resource_registry.read(notification._id)
#
# #-------------------------------------------------------------------------------------------------------------------
# # Update the notification in the notifications dict
# #-------------------------------------------------------------------------------------------------------------------
#
#
# self._update_notification_in_notifications_dict(new_notification=notification,
# notifications=self.notifications)
# #-------------------------------------------------------------------------------------------------------------------
# # Update the notification in the registry
# #-------------------------------------------------------------------------------------------------------------------
# '''
# Since one user should not be able to update the notification request resource without the knowledge of other users
# who have subscribed to the same notification request, we do not update the resource in the resource registry
# '''
#
## self.clients.resource_registry.update(notification)
#
# #-------------------------------------------------------------------------------------------------------------------
# # reading up the notification object to make sure we have the newly registered notification request object
# #-------------------------------------------------------------------------------------------------------------------
#
# notification_id = notification._id
# notification = self.clients.resource_registry.read(notification_id)
#
# #------------------------------------------------------------------------------------
# # Update the UserInfo object
# #------------------------------------------------------------------------------------
#
# user = self.update_user_info_object(user_id, notification)
#
# #-------------------------------------------------------------------------------------------------------------------
# # Generate an event that can be picked by notification workers so that they can update their user_info dictionary
# #-------------------------------------------------------------------------------------------------------------------
# log.info("(update notification) Publishing ReloadUserInfoEvent for updated notification")
#
# self.event_publisher.publish_event( event_type= "ReloadUserInfoEvent",
# origin="UserNotificationService",
# description= "A notification has been updated.",
# notification_id = notification_id
# )
def read_notification(self, notification_id=''):
"""Returns the NotificationRequest object for the specified notification id.
Throws exception if id does not match any persisted NotificationRequest
objects.
@param notification_id str
@retval notification NotificationRequest
@throws NotFound object with specified id does not exist
"""
notification = self.clients.resource_registry.read(notification_id)
return notification
def delete_notification(self, notification_id=''):
"""For now, permanently deletes NotificationRequest object with the specified
id. Throws exception if id does not match any persisted NotificationRequest.
@param notification_id str
@throws NotFound object with specified id does not exist
"""
#-------------------------------------------------------------------------------------------------------------------
# Stop the event subscriber for the notification
#-------------------------------------------------------------------------------------------------------------------
notification_request = self.clients.resource_registry.read(
notification_id)
#-------------------------------------------------------------------------------------------------------------------
# Update the resource registry
#-------------------------------------------------------------------------------------------------------------------
notification_request.temporal_bounds.end_datetime = get_ion_ts()
self.clients.resource_registry.update(notification_request)
#-------------------------------------------------------------------------------------------------------------------
# Find users who are interested in the notification and update the notification in the list maintained by the UserInfo object
#-------------------------------------------------------------------------------------------------------------------
# user_ids, _ = self.clients.resource_registry.find_subjects(RT.UserInfo, PRED.hasNotification, notification_id, True)
#
# for user_id in user_ids:
# self.update_user_info_object(user_id, notification_request)
#-------------------------------------------------------------------------------------------------------------------
# Generate an event that can be picked by a notification worker so that it can update its user_info dictionary
#-------------------------------------------------------------------------------------------------------------------
log.info(
"(delete notification) Publishing ReloadUserInfoEvent for notification_id: %s",
notification_id)
self.event_publisher.publish_event(
event_type=OT.ReloadUserInfoEvent,
origin="UserNotificationService",
description="A notification has been deleted.",
notification_id=notification_id)
# def delete_notification_from_user_info(self, notification_id):
# """
# Helper method to delete the notification from the user_info dictionary
#
# @param notification_id str
# """
#
# user_ids, assocs = self.clients.resource_registry.find_subjects(object=notification_id, predicate=PRED.hasNotification, id_only=True)
#
# for assoc in assocs:
# self.clients.resource_registry.delete_association(assoc)
#
# for user_id in user_ids:
#
# value = self.user_info[user_id]
#
# for notif in value['notifications']:
# if notification_id == notif._id:
# # remove the notification
# value['notifications'].remove(notif)
#
# self.reverse_user_info = calculate_reverse_user_info(self.user_info)
def find_events(self,
origin='',
type='',
min_datetime=0,
max_datetime=0,
limit=-1,
descending=False):
"""
This method leverages couchdb view and simple filters. It does not use elastic search.
Returns a list of events that match the specified search criteria. Will throw a not NotFound exception
if no events exist for the given parameters.
@param origin str
@param min_datetime int seconds
@param max_datetime int seconds
@param limit int (integer limiting the number of results (0 means unlimited))
@param descending boolean (if True, reverse order (of production time) is applied, e.g. most recent first)
@retval event_list []
@throws NotFound object with specified parameters does not exist
@throws NotFound object with specified parameters does not exist
"""
event_tuples = []
try:
event_tuples = self.container.event_repository.find_events(
event_type=type,
origin=origin,
start_ts=min_datetime,
end_ts=max_datetime,
limit=limit,
descending=descending)
except Exception as exc:
log.warning(
"The UNS find_events operation for event origin = %s and type = %s failed. Error message = %s",
origin, type, exc.message)
events = [item[2] for item in event_tuples]
log.debug("(find_events) UNS found the following relevant events: %s",
events)
return events
#todo Uses Elastic Search. Later extend this to a larger search criteria
def find_events_extended(self,
origin='',
type='',
min_time=0,
max_time=0,
limit=-1,
descending=False):
"""Uses Elastic Search. Returns a list of events that match the specified search criteria. Will throw a not NotFound exception
if no events exist for the given parameters.
@param origin str
@param type str
@param min_time int seconds
@param max_time int seconds
@param limit int (integer limiting the number of results (0 means unlimited))
@param descending boolean (if True, reverse order (of production time) is applied, e.g. most recent first)
@retval event_list []
@throws NotFound object with specified parameters does not exist
@throws NotFound object with specified parameters does not exist
"""
query = []
if min_time and max_time:
query.append(
"SEARCH 'ts_created' VALUES FROM %s TO %s FROM 'events_index'"
% (min_time, max_time))
if origin:
query.append('search "origin" is "%s" from "events_index"' %
origin)
if type:
query.append('search "type_" is "%s" from "events_index"' % type)
search_string = ' and '.join(query)
# get the list of ids corresponding to the events
ret_vals = self.discovery.parse(search_string)
if len(query) > 1:
events = self.datastore.read_mult(ret_vals)
else:
events = [i['_source'] for i in ret_vals]
log.debug(
"(find_events_extended) Discovery search returned the following event ids: %s",
ret_vals)
log.debug(
"(find_events_extended) UNS found the following relevant events: %s",
events)
if limit > 0:
return events[:limit]
#todo implement time ordering: ascending or descending
return events
def publish_event_object(self, event=None):
"""
This service operation would publish the given event from an event object.
@param event !Event
@retval event !Event
"""
event = self.event_publisher.publish_event_object(event_object=event)
log.info(
"The publish_event_object(event) method of UNS was used to publish the event: %s",
event)
return event
def publish_event(self,
event_type='',
origin='',
origin_type='',
sub_type='',
description='',
event_attrs=None):
"""
This service operation assembles a new Event object based on event_type
(e.g. via the pyon Event publisher) with optional additional attributes from a event_attrs
dict of arbitrary attributes.
@param event_type str
@param origin str
@param origin_type str
@param sub_type str
@param description str
@param event_attrs dict
@retval event !Event
"""
event_attrs = event_attrs or {}
event = self.event_publisher.publish_event(event_type=event_type,
origin=origin,
origin_type=origin_type,
sub_type=sub_type,
description=description,
**event_attrs)
log.info(
"The publish_event() method of UNS was used to publish an event: %s",
event)
return event
def get_recent_events(self, resource_id='', limit=100):
"""
Get recent events for use in extended resource computed attribute
@param resource_id str
@param limit int
@retval ComputedListValue with value list of 4-tuple with Event objects
"""
now = get_ion_ts()
events = self.find_events(origin=resource_id,
limit=limit,
max_datetime=now,
descending=True)
ret = IonObject(OT.ComputedEventListValue)
if events:
ret.value = events
ret.computed_list = [
get_event_computed_attributes(event) for event in events
]
ret.status = ComputedValueAvailability.PROVIDED
else:
ret.status = ComputedValueAvailability.NOTAVAILABLE
return ret
def get_user_notifications(self, user_info_id=''):
"""
Get the notification request objects that are subscribed to by the user
@param user_info_id str
@retval notifications list of NotificationRequest objects
"""
notifications = []
user_notif_req_objs, _ = self.clients.resource_registry.find_objects(
subject=user_info_id,
predicate=PRED.hasNotification,
object_type=RT.NotificationRequest,
id_only=False)
log.debug("Got %s notifications, for the user: %s",
len(user_notif_req_objs), user_info_id)
for notif in user_notif_req_objs:
# do not include notifications that have expired
if notif.temporal_bounds.end_datetime == '':
notifications.append(notif)
return notifications
def create_worker(self, number_of_workers=1):
"""
Creates notification workers
@param number_of_workers int
@retval pids list
"""
pids = []
for n in xrange(number_of_workers):
process_definition = ProcessDefinition(
name='notification_worker_%s' % n)
process_definition.executable = {
'module': 'ion.processes.data.transforms.notification_worker',
'class': 'NotificationWorker'
}
process_definition_id = self.process_dispatcher.create_process_definition(
process_definition=process_definition)
# ------------------------------------------------------------------------------------
# Process Spawning
# ------------------------------------------------------------------------------------
pid2 = self.process_dispatcher.create_process(
process_definition_id)
#@todo put in a configuration
configuration = {}
configuration['process'] = dict({
'name':
'notification_worker_%s' % n,
'type':
'simple',
'queue_name':
'notification_worker_queue'
})
pid = self.process_dispatcher.schedule_process(
process_definition_id,
configuration=configuration,
process_id=pid2)
pids.append(pid)
return pids
def process_batch(self, start_time='', end_time=''):
"""
This method is launched when an process_batch event is received. The user info dictionary maintained
by the User Notification Service is used to query the event repository for all events for a particular
user that have occurred in a provided time interval, and then an email is sent to the user containing
the digest of all the events.
@param start_time int milliseconds
@param end_time int milliseconds
"""
self.smtp_client = setting_up_smtp_client()
if end_time <= start_time:
return
for user_id, value in self.user_info.iteritems():
notifications = self.get_user_notifications(user_info_id=user_id)
notifications_disabled = value['notifications_disabled']
notifications_daily_digest = value['notifications_daily_digest']
# Ignore users who do NOT want batch notifications or who have disabled the delivery switch
# However, if notification preferences have not been set for the user, use the default mechanism and do not bother
if notifications_disabled or not notifications_daily_digest:
continue
events_for_message = []
search_time = "SEARCH 'ts_created' VALUES FROM %s TO %s FROM 'events_index'" % (
start_time, end_time)
for notification in notifications:
# If the notification request has expired, then do not use it in the search
if notification.temporal_bounds.end_datetime:
continue
if CFG_ELASTIC_SEARCH:
if notification.origin:
search_origin = 'search "origin" is "%s" from "events_index"' % notification.origin
else:
search_origin = 'search "origin" is "*" from "events_index"'
if notification.origin_type:
search_origin_type = 'search "origin_type" is "%s" from "events_index"' % notification.origin_type
else:
search_origin_type = 'search "origin_type" is "*" from "events_index"'
if notification.event_type:
search_event_type = 'search "type_" is "%s" from "events_index"' % notification.event_type
else:
search_event_type = 'search "type_" is "*" from "events_index"'
search_string = search_time + ' and ' + search_origin + ' and ' + search_origin_type + ' and ' + search_event_type
# get the list of ids corresponding to the events
log.debug('process_batch search_string: %s',
search_string)
ret_vals = self.discovery.parse(search_string)
events_for_message.extend(
self.datastore.read_mult(ret_vals))
else:
# Adding a branch
event_tuples = self.container.event_repository.find_events(
origin=notification.origin,
event_type=notification.event_type,
start_ts=start_time,
end_ts=end_time)
events = [item[2] for item in event_tuples]
events_for_message.extend(events)
log.debug("Found following events of interest to user, %s: %s",
user_id, events_for_message)
# send a notification email to each user using a _send_email() method
if events_for_message:
self.format_and_send_email(
events_for_message=events_for_message,
user_id=user_id,
smtp_client=self.smtp_client)
self.smtp_client.quit()
def format_and_send_email(self,
events_for_message=None,
user_id=None,
smtp_client=None):
"""
Format the message for a particular user containing information about the events he is to be notified about
@param events_for_message list
@param user_id str
"""
message = str(events_for_message)
log.debug(
"The user, %s, will get the following events in his batch notification email: %s",
user_id, message)
msg = convert_events_to_email_message(events_for_message,
self.clients.resource_registry)
msg["Subject"] = "(SysName: " + get_sys_name() + ") ION event "
msg["To"] = self.user_info[user_id]['user_contact'].email
self.send_batch_email(msg, smtp_client)
def send_batch_email(self, msg=None, smtp_client=None):
"""
Send the email
@param msg MIMEText object of email message
@param smtp_client object
"""
if msg is None: msg = {}
for f in ["Subject", "To"]:
if not f in msg: raise BadRequest("'%s' not in msg %s" % (f, msg))
msg_subject = msg["Subject"]
msg_recipient = msg["To"]
msg['From'] = self.ION_NOTIFICATION_EMAIL_ADDRESS
log.debug("UNS sending batch (digest) email from %s to %s",
self.ION_NOTIFICATION_EMAIL_ADDRESS, msg_recipient)
smtp_sender = CFG.get_safe('server.smtp.sender')
smtp_client.sendmail(smtp_sender, [msg_recipient], msg.as_string())
def update_user_info_object(self, user_id, new_notification):
"""
Update the UserInfo object. If the passed in parameter, od_notification, is None, it does not need to remove the old notification
@param user_id str
@param new_notification NotificationRequest
"""
#this is not necessary if notifiactions are not stored in the userinfo object
raise NotImplementedError(
"This method is not necessary because Notifications are not stored in the userinfo object"
)
#------------------------------------------------------------------------------------
# read the user
#------------------------------------------------------------------------------------
# user = self.clients.resource_registry.read(user_id)
#
# if not user:
# raise BadRequest("No user with the provided user_id: %s" % user_id)
#
# for item in user.variables:
# if type(item) is dict and item.has_key('name') and item['name'] == 'notifications':
# for notif in item['value']:
# if notif._id == new_notification._id:
# log.debug("came here for updating notification")
# notifications = item['value']
# notifications.remove(notif)
# notifications.append(new_notification)
# break
# else:
# log.warning('Invalid variables attribute on UserInfo instance. UserInfo: %s', user)
#
#
# #------------------------------------------------------------------------------------
# # update the resource registry
# #------------------------------------------------------------------------------------
#
# log.debug("user.variables::: %s", user.variables)
#
# self.clients.resource_registry.update(user)
#
# return user
def get_subscriptions(self,
resource_id='',
user_id='',
include_nonactive=False):
"""
@param resource_id a resource id (or other origin) that is the origin of events for notifications
@param user_id a UserInfo ID that owns the NotificationRequest
@param include_nonactive if False, filter to active NotificationRequest only
Return all NotificationRequest resources where origin is given resource_id.
"""
notif_reqs, _ = self.clients.resource_registry.find_resources_ext(
restype=RT.NotificationRequest,
attr_name="origin",
attr_value=resource_id,
id_only=False)
log.debug(
"Got %s active and past NotificationRequests for resource/origin %s",
len(notif_reqs), resource_id)
if not include_nonactive:
notif_reqs = [
nr for nr in notif_reqs
if nr.temporal_bounds.end_datetime == ''
]
log.debug("Filtered to %s active NotificationRequests",
len(notif_reqs))
if user_id:
# Get all NotificationRequests (ID) that are associated to given UserInfo_id
user_notif_req_ids, _ = self.clients.resource_registry.find_objects(
subject=user_id,
predicate=PRED.hasNotification,
object_type=RT.NotificationRequest,
id_only=True)
notif_reqs = [
nr for nr in notif_reqs if nr._id in user_notif_req_ids
]
log.debug(
"Filtered to %s NotificationRequests associated to user %s",
len(notif_reqs), user_id)
return notif_reqs
def get_subscriptions_attribute(self,
resource_id='',
user_id='',
include_nonactive=False):
retval = self.get_subscriptions(resource_id=resource_id,
user_id=user_id,
include_nonactive=include_nonactive)
container = ComputedListValue(value=retval)
return container
def _notification_in_notifications(self,
notification=None,
notifications=None):
for notif in notifications:
if notif.name == notification.name and \
notif.origin == notification.origin and \
notif.origin_type == notification.origin_type and \
notif.event_type == notification.event_type:
return notif._id
return None
def load_user_info(self):
"""
Method to load the user info dictionary used by the notification workers and the UNS
@retval user_info dict
"""
users, _ = self.clients.resource_registry.find_resources(
restype=RT.UserInfo)
user_info = {}
if not users:
return {}
for user in users:
notifications = []
notifications_disabled = False
notifications_daily_digest = False
#retrieve all the active notifications assoc to this user
notifications = self.get_user_notifications(user_info_id=user)
log.debug('load_user_info notifications: %s', notifications)
for variable in user.variables:
if type(variable) is dict and variable.has_key('name'):
if variable['name'] == 'notifications_daily_digest':
notifications_daily_digest = variable['value']
if variable['name'] == 'notifications_disabled':
notifications_disabled = variable['value']
else:
log.warning(
'Invalid variables attribute on UserInfo instance. UserInfo: %s',
user)
user_info[user._id] = {
'user_contact': user.contact,
'notifications': notifications,
'notifications_daily_digest': notifications_daily_digest,
'notifications_disabled': notifications_disabled
}
return user_info
##
##
## GOVERNANCE FUNCTIONS
##
##
def check_subscription_policy(self, process, message, headers):
try:
gov_values = GovernanceHeaderValues(headers=headers,
process=process,
resource_id_required=False)
except Inconsistent, ex:
return False, ex.message
if gov_values.op == 'delete_notification':
return True, ''
notification = message['notification']
resource_id = notification.origin
if notification.origin_type == RT.Org:
org = self.clients.resource_registry.read(resource_id)
if (has_org_role(gov_values.actor_roles, org.org_governance_name,
[ORG_MEMBER_ROLE])):
return True, ''
else:
orgs, _ = self.clients.resource_registry.find_subjects(
subject_type=RT.Org,
predicate=PRED.hasResource,
object=resource_id,
id_only=False)
for org in orgs:
if (has_org_role(gov_values.actor_roles,
org.org_governance_name, [ORG_MEMBER_ROLE])):
return True, ''
return False, '%s(%s) has been denied since the user is not a member in any org to which the resource id %s belongs ' % (
process.name, gov_values.op, resource_id)
class UserNotificationService(BaseUserNotificationService):
"""
A service that provides users with an API for CRUD methods for notifications.
"""
def __init__(self, *args, **kwargs):
self._subscribers = []
self._schedule_ids = []
BaseUserNotificationService.__init__(self, *args, **kwargs)
def on_start(self):
#---------------------------------------------------------------------------------------------------
# Get the event Repository
#---------------------------------------------------------------------------------------------------
# self.ION_NOTIFICATION_EMAIL_ADDRESS = '*****@*****.**'
self.ION_NOTIFICATION_EMAIL_ADDRESS = CFG.get_safe('server.smtp.sender')
#---------------------------------------------------------------------------------------------------
# Create an event processor
#---------------------------------------------------------------------------------------------------
self.event_processor = EmailEventProcessor()
#---------------------------------------------------------------------------------------------------
# load event originators, types, and table
#---------------------------------------------------------------------------------------------------
self.notifications = {}
#---------------------------------------------------------------------------------------------------
# Dictionaries that maintain information about users and their subscribed notifications
# The reverse_user_info is calculated from the user_info dictionary
#---------------------------------------------------------------------------------------------------
self.user_info = {}
self.reverse_user_info = {}
#---------------------------------------------------------------------------------------------------
# Get the clients
#---------------------------------------------------------------------------------------------------
self.discovery = DiscoveryServiceClient()
self.process_dispatcher = ProcessDispatcherServiceClient()
self.event_publisher = EventPublisher()
self.datastore = self.container.datastore_manager.get_datastore('events')
self.start_time = get_ion_ts()
#------------------------------------------------------------------------------------
# Create an event subscriber for Reload User Info events
#------------------------------------------------------------------------------------
def reload_user_info(event_msg, headers):
'''
Callback method for the subscriber to ReloadUserInfoEvent
'''
notification_id = event_msg.notification_id
log.debug("(UNS instance received a ReloadNotificationEvent. The relevant notification_id is %s" % notification_id)
try:
self.user_info = self.load_user_info()
except NotFound:
log.warning("ElasticSearch has not yet loaded the user_index.")
self.reverse_user_info = calculate_reverse_user_info(self.user_info)
log.debug("(UNS instance) After a reload, the user_info: %s" % self.user_info)
log.debug("(UNS instance) The recalculated reverse_user_info: %s" % self.reverse_user_info)
# the subscriber for the ReloadUSerInfoEvent
self.reload_user_info_subscriber = EventSubscriber(
event_type="ReloadUserInfoEvent",
origin='UserNotificationService',
callback=reload_user_info
)
self.reload_user_info_subscriber.start()
# For cleanup of the subscriber
self._subscribers.append(self.reload_user_info_subscriber)
def on_quit(self):
"""
Handles stop/terminate.
Cleans up subscribers spawned here, terminates any scheduled tasks to the scheduler.
"""
for sub in self._subscribers:
sub.stop()
for sid in self._schedule_ids:
try:
self.clients.scheduler.cancel_timer(sid)
except IonException as ex:
log.info("Ignoring exception while cancelling schedule id (%s): %s: %s", sid, ex.__class__.__name__, ex)
super(UserNotificationService, self).on_quit()
def __now(self):
"""
This method defines what the UNS uses as its "current" time
"""
return datetime.utcnow()
def set_process_batch_key(self, process_batch_key = ''):
"""
This method allows an operator to set the process_batch_key, a string.
Once this method is used by the operator, the UNS will start listening for timer events
published by the scheduler with origin = process_batch_key.
@param process_batch_key str
"""
def process(event_msg, headers):
self.end_time = get_ion_ts()
log.debug("process_batch being called with start_time = %s, end_time = %s", self.start_time, self.end_time)
# run the process_batch() method
self.process_batch(start_time=self.start_time, end_time=self.end_time)
self.start_time = self.end_time
# the subscriber for the batch processing
"""
To trigger the batch notification, have the scheduler create a timer with event_origin = process_batch_key
"""
self.batch_processing_subscriber = EventSubscriber(
event_type="ResourceEvent",
origin=process_batch_key,
queue_name='user_notification',
callback=process
)
self.batch_processing_subscriber.start()
self._subscribers.append(self.batch_processing_subscriber)
def create_notification(self, notification=None, user_id=''):
"""
Persists the provided NotificationRequest object for the specified Origin id.
Associate the Notification resource with the user_id string.
returned id is the internal id by which NotificationRequest will be identified
in the data store.
@param notification NotificationRequest
@param user_id str
@retval notification_id str
@throws BadRequest if object passed has _id or _rev attribute
"""
if not user_id:
raise BadRequest("User id not provided.")
log.debug("Create notification called for user_id: %s, and notification: %s", user_id, notification)
#---------------------------------------------------------------------------------------------------
# Persist Notification object as a resource if it has already not been persisted
#---------------------------------------------------------------------------------------------------
# if the notification has already been registered, simply use the old id
notification_id = self._notification_in_notifications(notification, self.notifications)
# since the notification has not been registered yet, register it and get the id
temporal_bounds = TemporalBounds()
temporal_bounds.start_datetime = get_ion_ts()
temporal_bounds.end_datetime = ''
if not notification_id:
notification.temporal_bounds = temporal_bounds
notification_id, _ = self.clients.resource_registry.create(notification)
self.notifications[notification_id] = notification
else:
log.debug("Notification object has already been created in resource registry before. No new id to be generated. notification_id: %s", notification_id)
# Read the old notification already in the resource registry
notification = self.clients.resource_registry.read(notification_id)
# Update the temporal bounds of the old notification resource
notification.temporal_bounds = temporal_bounds
# Update the notification in the resource registry
self.clients.resource_registry.update(notification)
log.debug("The temporal bounds for this resubscribed notification object with id: %s, is: %s", notification_id,notification.temporal_bounds)
# Link the user and the notification with a hasNotification association
assocs= self.clients.resource_registry.find_associations(subject=user_id,
predicate=PRED.hasNotification,
object=notification_id,
id_only=True)
if assocs:
log.debug("Got an already existing association: %s, between user_id: %s, and notification_id: %s", assocs,user_id,notification_id)
return notification_id
else:
log.debug("Creating association between user_id: %s, and notification_id: %s", user_id, notification_id )
self.clients.resource_registry.create_association(user_id, PRED.hasNotification, notification_id)
# read the registered notification request object because this has an _id and is more useful
notification = self.clients.resource_registry.read(notification_id)
# Update the user info object with the notification
self.event_processor.add_notification_for_user(new_notification=notification, user_id=user_id)
#-------------------------------------------------------------------------------------------------------------------
# Generate an event that can be picked by a notification worker so that it can update its user_info dictionary
#-------------------------------------------------------------------------------------------------------------------
log.debug("(create notification) Publishing ReloadUserInfoEvent for notification_id: %s", notification_id)
self.event_publisher.publish_event( event_type= "ReloadUserInfoEvent",
origin="UserNotificationService",
description= "A notification has been created.",
notification_id = notification_id)
return notification_id
def update_notification(self, notification=None, user_id = ''):
"""Updates the provided NotificationRequest object. Throws NotFound exception if
an existing version of NotificationRequest is not found. Throws Conflict if
the provided NotificationRequest object is not based on the latest persisted
version of the object.
@param notification NotificationRequest
@throws BadRequest if object does not have _id or _rev attribute
@throws NotFound object with specified id does not exist
@throws Conflict object not based on latest persisted object version
"""
raise NotImplementedError("This method needs to be worked out in terms of implementation")
# #-------------------------------------------------------------------------------------------------------------------
# # Get the old notification
# #-------------------------------------------------------------------------------------------------------------------
#
# old_notification = self.clients.resource_registry.read(notification._id)
#
# #-------------------------------------------------------------------------------------------------------------------
# # Update the notification in the notifications dict
# #-------------------------------------------------------------------------------------------------------------------
#
#
# self._update_notification_in_notifications_dict(new_notification=notification,
# notifications=self.notifications)
# #-------------------------------------------------------------------------------------------------------------------
# # Update the notification in the registry
# #-------------------------------------------------------------------------------------------------------------------
# '''
# Since one user should not be able to update the notification request resource without the knowledge of other users
# who have subscribed to the same notification request, we do not update the resource in the resource registry
# '''
#
## self.clients.resource_registry.update(notification)
#
# #-------------------------------------------------------------------------------------------------------------------
# # reading up the notification object to make sure we have the newly registered notification request object
# #-------------------------------------------------------------------------------------------------------------------
#
# notification_id = notification._id
# notification = self.clients.resource_registry.read(notification_id)
#
# #------------------------------------------------------------------------------------
# # Update the UserInfo object
# #------------------------------------------------------------------------------------
#
# user = self.update_user_info_object(user_id, notification)
#
# #-------------------------------------------------------------------------------------------------------------------
# # Generate an event that can be picked by notification workers so that they can update their user_info dictionary
# #-------------------------------------------------------------------------------------------------------------------
# log.info("(update notification) Publishing ReloadUserInfoEvent for updated notification")
#
# self.event_publisher.publish_event( event_type= "ReloadUserInfoEvent",
# origin="UserNotificationService",
# description= "A notification has been updated.",
# notification_id = notification_id
# )
def read_notification(self, notification_id=''):
"""Returns the NotificationRequest object for the specified notification id.
Throws exception if id does not match any persisted NotificationRequest
objects.
@param notification_id str
@retval notification NotificationRequest
@throws NotFound object with specified id does not exist
"""
notification = self.clients.resource_registry.read(notification_id)
return notification
def delete_notification(self, notification_id=''):
"""For now, permanently deletes NotificationRequest object with the specified
id. Throws exception if id does not match any persisted NotificationRequest.
@param notification_id str
@throws NotFound object with specified id does not exist
"""
#-------------------------------------------------------------------------------------------------------------------
# Stop the event subscriber for the notification
#-------------------------------------------------------------------------------------------------------------------
notification_request = self.clients.resource_registry.read(notification_id)
#-------------------------------------------------------------------------------------------------------------------
# Update the resource registry
#-------------------------------------------------------------------------------------------------------------------
notification_request.temporal_bounds.end_datetime = get_ion_ts()
self.clients.resource_registry.update(notification_request)
#-------------------------------------------------------------------------------------------------------------------
# Find users who are interested in the notification and update the notification in the list maintained by the UserInfo object
#-------------------------------------------------------------------------------------------------------------------
user_ids, _ = self.clients.resource_registry.find_subjects(RT.UserInfo, PRED.hasNotification, notification_id, True)
for user_id in user_ids:
self.update_user_info_object(user_id, notification_request)
#-------------------------------------------------------------------------------------------------------------------
# Generate an event that can be picked by a notification worker so that it can update its user_info dictionary
#-------------------------------------------------------------------------------------------------------------------
log.info("(delete notification) Publishing ReloadUserInfoEvent for notification_id: %s", notification_id)
self.event_publisher.publish_event( event_type= "ReloadUserInfoEvent",
origin="UserNotificationService",
description= "A notification has been deleted.",
notification_id = notification_id)
# def delete_notification_from_user_info(self, notification_id):
# """
# Helper method to delete the notification from the user_info dictionary
#
# @param notification_id str
# """
#
# user_ids, assocs = self.clients.resource_registry.find_subjects(object=notification_id, predicate=PRED.hasNotification, id_only=True)
#
# for assoc in assocs:
# self.clients.resource_registry.delete_association(assoc)
#
# for user_id in user_ids:
#
# value = self.user_info[user_id]
#
# for notif in value['notifications']:
# if notification_id == notif._id:
# # remove the notification
# value['notifications'].remove(notif)
#
# self.reverse_user_info = calculate_reverse_user_info(self.user_info)
def find_events(self, origin='', type='', min_datetime=0, max_datetime=0, limit= -1, descending=False):
"""
This method leverages couchdb view and simple filters. It does not use elastic search.
Returns a list of events that match the specified search criteria. Will throw a not NotFound exception
if no events exist for the given parameters.
@param origin str
@param event_type str
@param min_datetime int seconds
@param max_datetime int seconds
@param limit int (integer limiting the number of results (0 means unlimited))
@param descending boolean (if True, reverse order (of production time) is applied, e.g. most recent first)
@retval event_list []
@throws NotFound object with specified parameters does not exist
@throws NotFound object with specified parameters does not exist
"""
event_tuples = []
try:
event_tuples = self.container.event_repository.find_events(event_type=type, origin=origin, start_ts=min_datetime, end_ts=max_datetime, limit=limit, descending=descending)
except Exception as exc:
log.warning("The UNS find_events operation for event origin = %s and type = %s failed. Error message = %s", origin, type, exc.message)
events = [item[2] for item in event_tuples]
log.debug("(find_events) UNS found the following relevant events: %s", events)
return events
#todo Uses Elastic Search. Later extend this to a larger search criteria
def find_events_extended(self, origin='', type='', min_time= 0, max_time=0, limit=-1, descending=False):
"""Uses Elastic Search. Returns a list of events that match the specified search criteria. Will throw a not NotFound exception
if no events exist for the given parameters.
@param origin str
@param type str
@param min_time int seconds
@param max_time int seconds
@param limit int (integer limiting the number of results (0 means unlimited))
@param descending boolean (if True, reverse order (of production time) is applied, e.g. most recent first)
@retval event_list []
@throws NotFound object with specified parameters does not exist
@throws NotFound object with specified parameters does not exist
"""
query = []
if min_time and max_time:
query.append( "SEARCH 'ts_created' VALUES FROM %s TO %s FROM 'events_index'" % (min_time, max_time))
if origin:
query.append( 'search "origin" is "%s" from "events_index"' % origin)
if type:
query.append( 'search "type_" is "%s" from "events_index"' % type)
search_string = ' and '.join(query)
# get the list of ids corresponding to the events
ret_vals = self.discovery.parse(search_string)
if len(query) > 1:
events = self.datastore.read_mult(ret_vals)
else:
events = [i['_source'] for i in ret_vals]
log.debug("(find_events_extended) Discovery search returned the following event ids: %s", ret_vals)
log.debug("(find_events_extended) UNS found the following relevant events: %s", events)
if limit > 0:
return events[:limit]
#todo implement time ordering: ascending or descending
return events
def publish_event_object(self, event=None):
"""
This service operation would publish the given event from an event object.
@param event !Event
@retval event !Event
"""
event = self.event_publisher.publish_event_object(event_object=event)
log.info("The publish_event_object(event) method of UNS was used to publish the event: %s", event )
return event
def publish_event(self, event_type='', origin='', origin_type='', sub_type='', description='', event_attrs=None):
"""
This service operation assembles a new Event object based on event_type
(e.g. via the pyon Event publisher) with optional additional attributes from a event_attrs
dict of arbitrary attributes.
@param event_type str
@param origin str
@param origin_type str
@param sub_type str
@param description str
@param event_attrs dict
@retval event !Event
"""
event_attrs = event_attrs or {}
event = self.event_publisher.publish_event(
event_type = event_type,
origin = origin,
origin_type = origin_type,
sub_type = sub_type,
description = description,
**event_attrs
)
log.info("The publish_event() method of UNS was used to publish an event: %s", event)
return event
def get_recent_events(self, resource_id='', limit = 100):
"""
Get recent events for use in extended resource computed attribute
@param resource_id str
@param limit int
@retval ComputedListValue with value list of 4-tuple with Event objects
"""
now = get_ion_ts()
events = self.find_events(origin=resource_id, limit=limit, max_datetime=now, descending=True)
ret = IonObject(OT.ComputedEventListValue)
if events:
ret.value = events
ret.computed_list = [self._get_event_computed_attributes(event) for event in events]
ret.status = ComputedValueAvailability.PROVIDED
else:
ret.status = ComputedValueAvailability.NOTAVAILABLE
return ret
def _get_event_computed_attributes(self, event):
"""
@param event any Event to compute attributes for
@retval an EventComputedAttributes object for given event
"""
evt_computed = IonObject(OT.EventComputedAttributes)
evt_computed.event_id = event._id
evt_computed.ts_computed = get_ion_ts()
try:
summary = self._get_event_summary(event)
evt_computed.event_summary = summary
spc_attrs = ["%s:%s" % (k, str(getattr(event, k))[:50]) for k in sorted(event.__dict__.keys()) if k not in ['_id', '_rev', 'type_', 'origin', 'origin_type', 'ts_created', 'base_types']]
evt_computed.special_attributes = ", ".join(spc_attrs)
evt_computed.event_attributes_formatted = pprint.pformat(event.__dict__)
except Exception as ex:
log.exception("Error computing EventComputedAttributes for event %s" % event)
return evt_computed
def _get_event_summary(self, event):
event_types = [event.type_] + event.base_types
summary = ""
if "ResourceLifecycleEvent" in event_types:
summary = "%s lifecycle state change: %s_%s" % (event.origin_type, event.lcstate, event.availability)
elif "ResourceModifiedEvent" in event_types:
summary = "%s modified: %s" % (event.origin_type, event.sub_type)
elif "ResourceAgentStateEvent" in event_types:
summary = "%s agent state change: %s" % (event.origin_type, event.state)
elif "ResourceAgentResourceStateEvent" in event_types:
summary = "%s agent resource state change: %s" % (event.origin_type, event.state)
elif "ResourceAgentConfigEvent" in event_types:
summary = "%s agent config set: %s" % (event.origin_type, event.config)
elif "ResourceAgentResourceConfigEvent" in event_types:
summary = "%s agent resource config set: %s" % (event.origin_type, event.config)
elif "ResourceAgentCommandEvent" in event_types:
summary = "%s agent command '%s(%s)' succeeded: %s" % (event.origin_type, event.command, event.execute_command, "" if event.result is None else event.result)
elif "ResourceAgentErrorEvent" in event_types:
summary = "%s agent command '%s(%s)' failed: %s:%s (%s)" % (event.origin_type, event.command, event.execute_command, event.error_type, event.error_msg, event.error_code)
elif "ResourceAgentAsyncResultEvent" in event_types:
summary = "%s agent async command '%s(%s)' succeeded: %s" % (event.origin_type, event.command, event.desc, "" if event.result is None else event.result)
elif "ResourceAgentResourceCommandEvent" in event_types:
summary = "%s agent resource command '%s(%s)' executed: %s" % (event.origin_type, event.command, event.execute_command, "OK" if event.result is None else event.result)
elif "DeviceStatusEvent" in event_types:
summary = "%s '%s' status change: %s" % (event.origin_type, event.sub_type, DeviceStatusType._str_map.get(event.state,"???"))
elif "DeviceOperatorEvent" in event_types or "ResourceOperatorEvent" in event_types:
summary = "Operator entered: %s" % event.description
elif "OrgMembershipGrantedEvent" in event_types:
summary = "Joined Org '%s' as member" % (event.org_name)
elif "OrgMembershipCancelledEvent" in event_types:
summary = "Cancelled Org '%s' membership" % (event.org_name)
elif "UserRoleGrantedEvent" in event_types:
summary = "Granted %s in Org '%s'" % (event.role_name, event.org_name)
elif "UserRoleRevokedEvent" in event_types:
summary = "Revoked %s in Org '%s'" % (event.role_name, event.org_name)
elif "ResourceSharedEvent" in event_types:
summary = "%s shared in Org: '%s'" % (event.sub_type, event.org_name)
elif "ResourceUnsharedEvent" in event_types:
summary = "%s unshared in Org: '%s'" % (event.sub_type, event.org_name)
elif "ResourceCommitmentCreatedEvent" in event_types:
summary = "%s commitment created in Org: '%s'" % (event.commitment_type, event.org_name)
elif "ResourceCommitmentReleasedEvent" in event_types:
summary = "%s commitment released in Org: '%s'" % (event.commitment_type, event.org_name)
# if event.description and summary:
# summary = summary + ". " + event.description
# elif event.description:
# summary = event.description
return summary
def get_user_notifications(self, user_info_id=''):
"""
Get the notification request objects that are subscribed to by the user
@param user_info_id str
@retval notifications list of NotificationRequest objects
"""
if self.user_info.has_key(user_info_id):
notifications = self.user_info[user_info_id]['notifications']
log.debug("Got %s notifications, for the user: %s", len(notifications), user_info_id)
for notif in notifications:
# remove notifications that have expired
if notif.temporal_bounds.end_datetime != '':
log.debug("removing notification: %s", notif)
notifications.remove(notif)
return notifications
# ret = IonObject(OT.ComputedListValue)
#
# if notifications:
# ret.value = notifications
# ret.status = ComputedValueAvailability.PROVIDED
# else:
# ret.status = ComputedValueAvailability.NOTAVAILABLE
# return ret
# else:
# return None
def create_worker(self, number_of_workers=1):
"""
Creates notification workers
@param number_of_workers int
@retval pids list
"""
pids = []
for n in xrange(number_of_workers):
process_definition = ProcessDefinition( name='notification_worker_%s' % n)
process_definition.executable = {
'module': 'ion.processes.data.transforms.notification_worker',
'class':'NotificationWorker'
}
process_definition_id = self.process_dispatcher.create_process_definition(process_definition=process_definition)
# ------------------------------------------------------------------------------------
# Process Spawning
# ------------------------------------------------------------------------------------
pid2 = self.process_dispatcher.create_process(process_definition_id)
#@todo put in a configuration
configuration = {}
configuration['process'] = dict({
'name': 'notification_worker_%s' % n,
'type':'simple',
'queue_name': 'notification_worker_queue'
})
pid = self.process_dispatcher.schedule_process(
process_definition_id,
configuration = configuration,
process_id=pid2
)
pids.append(pid)
return pids
def process_batch(self, start_time = '', end_time = ''):
"""
This method is launched when an process_batch event is received. The user info dictionary maintained
by the User Notification Service is used to query the event repository for all events for a particular
user that have occurred in a provided time interval, and then an email is sent to the user containing
the digest of all the events.
@param start_time int milliseconds
@param end_time int milliseconds
"""
self.smtp_client = setting_up_smtp_client()
if end_time <= start_time:
return
for user_id, value in self.user_info.iteritems():
notifications = value['notifications']
notification_preferences = value['notification_preferences']
# Ignore users who do NOT want batch notifications or who have disabled the delivery switch
# However, if notification preferences have not been set for the user, use the default mechanism and do not bother
if notification_preferences:
if notification_preferences.delivery_mode != NotificationDeliveryModeEnum.BATCH \
or not notification_preferences.delivery_enabled:
continue
events_for_message = []
search_time = "SEARCH 'ts_created' VALUES FROM %s TO %s FROM 'events_index'" % (start_time, end_time)
for notification in notifications:
# If the notification request has expired, then do not use it in the search
if notification.temporal_bounds.end_datetime:
continue
if notification.origin:
search_origin = 'search "origin" is "%s" from "events_index"' % notification.origin
else:
search_origin = 'search "origin" is "*" from "events_index"'
if notification.origin_type:
search_origin_type= 'search "origin_type" is "%s" from "events_index"' % notification.origin_type
else:
search_origin_type= 'search "origin_type" is "*" from "events_index"'
if notification.event_type:
search_event_type = 'search "type_" is "%s" from "events_index"' % notification.event_type
else:
search_event_type = 'search "type_" is "*" from "events_index"'
search_string = search_time + ' and ' + search_origin + ' and ' + search_origin_type + ' and ' + search_event_type
# get the list of ids corresponding to the events
ret_vals = self.discovery.parse(search_string)
events_for_message.extend(self.datastore.read_mult(ret_vals))
log.debug("Found following events of interest to user, %s: %s", user_id, events_for_message)
# send a notification email to each user using a _send_email() method
if events_for_message:
self.format_and_send_email(events_for_message = events_for_message,
user_id = user_id,
smtp_client=self.smtp_client)
self.smtp_client.quit()
def format_and_send_email(self, events_for_message = None, user_id = None, smtp_client = None):
"""
Format the message for a particular user containing information about the events he is to be notified about
@param events_for_message list
@param user_id str
"""
message = str(events_for_message)
log.debug("The user, %s, will get the following events in his batch notification email: %s", user_id, message)
msg_body = ''
count = 1
for event in events_for_message:
ts_created = _convert_to_human_readable(event.ts_created)
msg_body += string.join(("\r\n",
"Event %s: %s" % (count, event),
"",
"Originator: %s" % event.origin,
"",
"Description: %s" % event.description or "Not provided",
"",
"ts_created: %s" % ts_created,
"\r\n",
"------------------------"
"\r\n"))
count += 1
msg_body += "You received this notification from ION because you asked to be " +\
"notified about this event from this source. " +\
"To modify or remove notifications about this event, " +\
"please access My Notifications Settings in the ION Web UI. " +\
"Do not reply to this email. This email address is not monitored " +\
"and the emails will not be read. \r\n "
log.debug("The email has the following message body: %s", msg_body)
msg_subject = "(SysName: " + get_sys_name() + ") ION event "
self.send_batch_email( msg_body = msg_body,
msg_subject = msg_subject,
msg_recipient=self.user_info[user_id]['user_contact'].email,
smtp_client=smtp_client )
def send_batch_email(self, msg_body = None, msg_subject = None, msg_recipient = None, smtp_client = None):
"""
Send the email
@param msg_body str
@param msg_subject str
@param msg_recipient str
@param smtp_client object
"""
msg = MIMEText(msg_body)
msg['Subject'] = msg_subject
msg['From'] = self.ION_NOTIFICATION_EMAIL_ADDRESS
msg['To'] = msg_recipient
log.debug("UNS sending batch (digest) email from %s to %s" , self.ION_NOTIFICATION_EMAIL_ADDRESS, msg_recipient)
smtp_sender = CFG.get_safe('server.smtp.sender')
smtp_client.sendmail(smtp_sender, [msg_recipient], msg.as_string())
def update_user_info_object(self, user_id, new_notification):
"""
Update the UserInfo object. If the passed in parameter, od_notification, is None, it does not need to remove the old notification
@param user_id str
@param new_notification NotificationRequest
@param old_notification NotificationRequest
"""
#------------------------------------------------------------------------------------
# read the user
#------------------------------------------------------------------------------------
user = self.clients.resource_registry.read(user_id)
if not user:
raise BadRequest("No user with the provided user_id: %s" % user_id)
for item in user.variables:
if item['name'] == 'notifications':
for notif in item['value']:
if notif._id == new_notification._id:
log.debug("came here for updating notification")
notifications = item['value']
notifications.remove(notif)
notifications.append(new_notification)
break
#------------------------------------------------------------------------------------
# update the resource registry
#------------------------------------------------------------------------------------
log.debug("user.variables::: %s", user.variables)
self.clients.resource_registry.update(user)
return user
def _get_subscriptions(self, resource_id='', include_nonactive=False):
"""
This method is used to get the subscriptions to a data product. The method will return a list of NotificationRequest
objects for whom the origin is set to this data product. This way all the users who were interested in listening to
events with origin equal to this data product, will be known and all their subscriptions will be known.
@param resource_id
@param include_nonactive
@return notification_requests []
"""
search_origin = 'search "origin" is "%s" from "resources_index"' % resource_id
ret_vals = self.discovery.parse(search_origin)
log.debug("Using discovery with search_string: %s", search_origin)
log.debug("_get_subscriptions() got ret_vals: %s", ret_vals )
notifications_all = set()
notifications_active = set()
object_ids = []
for item in ret_vals:
if item['_type'] == 'NotificationRequest':
object_ids.append(item['_id'])
notifs = self.clients.resource_registry.read_mult(object_ids)
log.debug("Got %s notifications here. But they include both active and past notifications", len(notifs))
if include_nonactive:
# Add active or retired notification
notifications_all.update(notifs)
else:
for notif in notifs:
log.debug("Got the end_datetime here: notif.temporal_bounds.end_datetime = %s", notif.temporal_bounds.end_datetime)
if notif.temporal_bounds.end_datetime == '':
log.debug("removing the notification: %s", notif._id)
# Add the active notification
notifications_active.add(notif)
if include_nonactive:
return list(notifications_all)
else:
return list(notifications_active)
def get_subscriptions(self, resource_id='', user_id = '', include_nonactive=False):
"""
This method takes the user-id as an input parameter. The logic will first find all notification requests for this resource
then if a user_id is present, it will filter on those that this user is associated with.
"""
# Get the notifications whose origin field has the provided resource_id
notifs = self._get_subscriptions(resource_id=resource_id, include_nonactive=include_nonactive)
log.debug("For include_nonactive= %s, UNS fetched the following the notifications subscribed to the resource_id: %s --> %s. "
"They are %s in number", include_nonactive,resource_id, notifs, len(notifs))
if not user_id:
return notifs
notifications = []
# Now find the users who subscribed to the above notifications
#todo Right now looking at assocs in a loop which is not efficient to find the users linked to these notifications
# todo(contd) Need to use a more efficient way later
for notif in notifs:
notif_id = notif._id
# Find if the user is associated with this notification request
ids, _ = self.clients.resource_registry.find_subjects( subject_type = RT.UserInfo, object=notif_id, predicate=PRED.hasNotification, id_only=True)
log.debug("Got the following users: %s, associated with the notification: %s", ids, notif_id)
if ids and user_id in ids:
notifications.append(notif)
log.debug("For include_nonactive = %s, UNS fetched the following %s notifications subscribed to %s --> %s", include_nonactive,len(notifications),user_id, notifications)
return notifications
def get_subscriptions_attribute(self, resource_id='', user_id = '', include_nonactive=False):
retval = self.get_subscriptions(resource_id=resource_id, user_id=user_id, include_nonactive=include_nonactive)
container = ComputedListValue(value=retval)
return container
# def get_users_who_subscribed(self, resource_id='', include_nonactive=False):
#
# # Get the notifications whose origin field has the provided resource_id
# notifications = self.get_subscriptions(resource_id, include_nonactive)
#
# # Now find the users who subscribed to the above notifications
# #todo Right now looking at assocs in a loop which is not efficient to find the users linked to these notifications
# # todo(contd) Need to use a more efficient way later
#
# user_ids = set()
# for notif in notifications:
# notif_id = notif._id
# # Find the users who are associated with this notification request
# ids, _ = self.clients.resource_registry.find_subjects( subject_type = RT.UserInfo, object=notif_id, predicate=PRED.hasNotification, id_only=True)
# user_ids.add(ids)
#
# return user_ids
def _notification_in_notifications(self, notification = None, notifications = None):
for id, notif in notifications.iteritems():
if notif.name == notification.name and \
notif.origin == notification.origin and \
notif.origin_type == notification.origin_type and \
notif.event_type == notification.event_type:
return id
return None
def _update_notification_in_notifications_dict(self, new_notification = None, notifications = None ):
for id, notif in notifications.iteritems():
if id == new_notification._id:
notifications.pop(id)
notifications[id] = new_notification
break
def load_user_info(self):
'''
Method to load the user info dictionary used by the notification workers and the UNS
@retval user_info dict
'''
users, _ = self.clients.resource_registry.find_resources(restype= RT.UserInfo)
user_info = {}
if not users:
return {}
for user in users:
notifications = []
notification_preferences = None
for variable in user.variables:
if variable['name'] == 'notifications':
notifications = variable['value']
if variable['name'] == 'notification_preferences':
notification_preferences = variable['value']
user_info[user._id] = { 'user_contact' : user.contact, 'notifications' : notifications, 'notification_preferences' : notification_preferences}
return user_info
