Source code for osprofiler.notifier

# Copyright 2014 Mirantis Inc.
# 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

from osprofiler.drivers import base


LOG = logging.getLogger(__name__)


def _noop_notifier(info, context=None):
    """Do nothing on notify()."""


# NOTE(boris-42): By default we are using noop notifier.
__notifier = _noop_notifier
__notifier_cache = {}  # map: connection-string -> notifier


[docs]def notify(info): """Passes the profiling info to the notifier callable. :param info: dictionary with profiling information """ __notifier(info)
[docs]def get(): """Returns notifier callable.""" return __notifier
[docs]def set(notifier): """Service that are going to use profiler should set callable notifier. Callable notifier is instance of callable object, that accept exactly one argument "info". "info" - is dictionary of values that contains profiling information. """ global __notifier __notifier = notifier
[docs]def create(connection_string, *args, **kwargs): """Create notifier based on specified plugin_name :param connection_string: connection string which specifies the storage driver for notifier :param args: args that will be passed to the driver's __init__ method :param kwargs: kwargs that will be passed to the driver's __init__ method :returns: Callable notifier method """ global __notifier_cache if connection_string not in __notifier_cache: try: driver = base.get_driver(connection_string, *args, **kwargs) __notifier_cache[connection_string] = driver.notify LOG.info("osprofiler is enabled with connection string: %s", connection_string) except Exception: LOG.exception("Could not initialize driver for connection string " "%s, osprofiler is disabled", connection_string) __notifier_cache[connection_string] = _noop_notifier return __notifier_cache[connection_string]
[docs]def clear_notifier_cache(): __notifier_cache.clear()