aodh/ceilometer/api/hooks.py
Brad Pokorny e5d92994b1 Add support for API message localization
Using the lazy gettext functionality from oslo gettextutils,
it is possible to use the Accept-Language header to translate
an exception message to the user requested locale and return
that translation from the API.

Implements bp user-locale-api

Change-Id: I48de5e681827305eef60c7a77e8d3091f9d64be0
Co-authored-by: Mathew Odden <mrodden@us.ibm.com>
Co-authored-by: Ben Nemec <openstack@nemebean.com>
2013-08-06 16:56:31 +00:00

80 lines
2.5 KiB
Python

# -*- encoding: utf-8 -*-
#
# Copyright © 2012 New Dream Network, LLC (DreamHost)
#
# Author: Doug Hellmann <doug.hellmann@dreamhost.com>
# Angus Salkeld <asalkeld@redhat.com>
#
# 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 threading
from oslo.config import cfg
from pecan import hooks
from ceilometer import pipeline
from ceilometer import transformer
class ConfigHook(hooks.PecanHook):
"""Attach the configuration object to the request
so controllers can get to it.
"""
def before(self, state):
state.request.cfg = cfg.CONF
class DBHook(hooks.PecanHook):
def __init__(self, storage_engine, storage_connection):
self.storage_engine = storage_engine
self.storage_connection = storage_connection
def before(self, state):
state.request.storage_engine = self.storage_engine
state.request.storage_conn = self.storage_connection
class PipelineHook(hooks.PecanHook):
'''Create and attach a pipeline to the request so that
new samples can be posted via the /v2/meters/ API.
'''
pipeline_manager = None
def __init__(self):
if self.__class__.pipeline_manager is None:
# this is done here as the cfg options are not available
# when the file is imported.
self.__class__.pipeline_manager = pipeline.setup_pipeline(
transformer.TransformerExtensionManager(
'ceilometer.transformer'))
def before(self, state):
state.request.pipeline_manager = self.pipeline_manager
class TranslationHook(hooks.PecanHook):
def __init__(self):
# Use thread local storage to make this thread safe in situations
# where one pecan instance is being used to serve multiple request
# threads.
self.local_error = threading.local()
self.local_error.translatable_error = None
def after(self, state):
if hasattr(state.response, 'translatable_error'):
self.local_error.translatable_error = (
state.response.translatable_error)