Don't use a different thread local store to oslo.log

Context logging does not work if we don't do it in a way that
oslo.log can pick up the context.

- Use the thread local storage from the base RequestContext class.
- Use the helper method context.get_current() as appropriate
- Update the custom_backend_auth.
- Remove heat/openstack/common/local.py as it is now not used.

Change-Id: I64f6af5090e98579b93a616bc79f4aaa6cd2b2ee
Closes-bug: 1435588

heat/common/context.py

@@ -29,7 +29,6 @@ from heat.common import policy
 from heat.common import wsgi
 from heat.db import api as db_api
 from heat.engine import clients
-from heat.openstack.common import local
 
 LOG = logging.getLogger(__name__)
 
@@ -105,8 +104,6 @@ class RequestContext(context.RequestContext):
         self.auth_token_info = auth_token_info
         self.auth_url = auth_url
         self.roles = roles or []
-        if overwrite or not hasattr(local.store, 'context'):
-            self.update_store()
         self._session = None
         self._clients = None
         self.trust_id = trust_id
@@ -119,9 +116,6 @@ class RequestContext(context.RequestContext):
         else:
             self.is_admin = is_admin
 
-    def update_store(self):
-        local.store.context = self
-
     @property
     def session(self):
         if self._session is None:

heat/common/custom_backend_auth.py

@@ -18,12 +18,11 @@
 Middleware for authenticating against custom backends.
 """
 
-import logging
-
+from oslo_context import context
+from oslo_log import log as logging
 import webob.exc
 
 from heat.common.i18n import _
-from heat.openstack.common import local
 from heat.rpc import client as rpc_client
 
 LOG = logging.getLogger(__name__)
@@ -43,8 +42,8 @@ class AuthProtocol(object):
         we can't authenticate.
         """
         LOG.debug('Authenticating user token')
-        context = local.store.context
-        authenticated = self.rpc_client.authenticated_to_backend(context)
+        ctx = context.get_current()
+        authenticated = self.rpc_client.authenticated_to_backend(ctx)
         if authenticated:
             return self.app(env, start_response)
         else:

heat/openstack/common/local.py

@@ -1,45 +0,0 @@
-# Copyright 2011 OpenStack Foundation.
-# 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.
-
-"""Local storage of variables using weak references"""
-
-import threading
-import weakref
-
-
-class WeakLocal(threading.local):
-    def __getattribute__(self, attr):
-        rval = super(WeakLocal, self).__getattribute__(attr)
-        if rval:
-            # NOTE(mikal): this bit is confusing. What is stored is a weak
-            # reference, not the value itself. We therefore need to lookup
-            # the weak reference and return the inner value here.
-            rval = rval()
-        return rval
-
-    def __setattr__(self, attr, value):
-        value = weakref.ref(value)
-        return super(WeakLocal, self).__setattr__(attr, value)
-
-
-# NOTE(mikal): the name "store" should be deprecated in the future
-store = WeakLocal()
-
-# A "weak" store uses weak references and allows an object to fall out of scope
-# when it falls out of scope in the code that uses the thread local storage. A
-# "strong" store will hold a reference to the object so that it never falls out
-# of scope.
-weak_store = WeakLocal()
-strong_store = threading.local()

openstack-common.conf

@@ -3,7 +3,6 @@
 # The list of modules to copy from oslo-incubator
 module=crypto
 module=eventlet_backdoor
-module=local
 module=loopingcall
 module=policy
 module=service