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# Copyright 2014 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
"""RPC helpers relating to events."""
from __future__ import (
absolute_import,
print_function,
unicode_literals,
)
str = None
__metaclass__ = type
__all__ = [
"register_event_type",
"send_event",
"send_event_mac_address",
]
from maasserver.models import (
Event,
EventType,
MACAddress,
Node,
)
from maasserver.utils.async import transactional
from provisioningserver.logger.log import get_maas_logger
from provisioningserver.rpc.exceptions import NoSuchEventType
from provisioningserver.utils.twisted import synchronous
maaslog = get_maas_logger("region.events")
@synchronous
@transactional
def register_event_type(name, description, level):
"""Register an event type.
for :py:class:`~provisioningserver.rpc.region.RegisterEventType`.
"""
if not EventType.objects.filter(name=name).exists():
# We don't use EventType.objects.get_or_create here, because
# it won't cope with situations where `name` is identical but
# `description` has changed, and we'll still get an error
# because `name` has to be unique.
EventType.objects.create(
name=name, description=description, level=level)
@synchronous
@transactional
def send_event(system_id, type_name, description=''):
"""Send an event.
for :py:class:`~provisioningserver.rpc.region.SendEvent`.
"""
try:
event_type = EventType.objects.get(name=type_name)
except EventType.DoesNotExist:
raise NoSuchEventType.from_name(type_name)
try:
node = Node.objects.get(system_id=system_id)
except Node.DoesNotExist:
# The node doesn't exist, but we don't raise an exception - it's
# entirely possible the cluster has started sending events for a
# node that we don't know about yet.
# This is most likely to happen when a new node is trying to
# enlist.
maaslog.debug(
"Event '%s: %s' sent for non-existent node '%s'.",
type_name, description, system_id)
return
Event.objects.create(
node=node, type=event_type, description=description)
@synchronous
@transactional
def send_event_mac_address(mac_address, type_name, description=''):
"""Send an event.
for :py:class:`~provisioningserver.rpc.region.SendEventMACAddress`.
"""
try:
event_type = EventType.objects.get(name=type_name)
except EventType.DoesNotExist:
raise NoSuchEventType.from_name(type_name)
try:
node = MACAddress.objects.get(mac_address=mac_address).node
except MACAddress.DoesNotExist:
# The node doesn't exist, but we don't raise an exception - it's
# entirely possible the cluster has started sending events for a
# node that we don't know about yet.
# This is most likely to happen when a new node is trying to
# enlist.
maaslog.debug(
"Event '%s: %s' sent for non-existent node with MAC "
"address '%s'.",
type_name, description, mac_address)
return
Event.objects.create(
node=node, type=event_type, description=description)
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