/usr/share/pyshared/melange/common/notifier.py is in python-melange 1:2012.1-3.
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# Copyright 2011 OpenStack LLC.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import logging
import socket
from melange.common import config
from melange.common import exception
from melange.common import messaging
from melange.common import utils
class Notifier(object):
def error(self, event_type, payload):
self._send_message("error", event_type, payload)
def warn(self, event_type, payload):
self._send_message("warn", event_type, payload)
def info(self, event_type, payload):
self._send_message("info", event_type, payload)
def _send_message(self, level, event_type, payload):
msg = self._generate_message(event_type, level, payload)
self.notify(level, msg)
def _generate_message(self, event_type, priority, payload):
return {
"message_id": str(utils.generate_uuid()),
"publisher_id": socket.gethostname(),
"event_type": event_type,
"priority": priority,
"payload": payload,
"timestamp": str(utils.utcnow()),
}
def notify(self, level, msg):
pass
class NoopNotifier(Notifier):
def notify(self, level, msg):
pass
class LoggingNotifier(Notifier):
logger = logging.getLogger('melange.notifier.logging_notifier')
def notify(self, level, msg):
getattr(self.logger, level)(msg)
class QueueNotifier(Notifier):
def notify(self, level, msg):
topic = "%s.%s" % ("melange.notifier", level.upper())
with messaging.Queue(topic, "notifier") as queue:
queue.put(msg)
def notifier():
STRATEGIES = {
"logging": LoggingNotifier,
"queue": QueueNotifier,
"noop": NoopNotifier,
}
strategy = config.Config.get("notifier", "noop")
try:
return STRATEGIES[strategy]()
except KeyError:
raise exception.InvalidNotifier(notifier=strategy)
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