Sync log_handler module from Oslo

Ibf28ba17f Remove the notifier and its dependencies from log.py

Move the code related to the publish error handler out of the
log module so its easier for other projects to consume it

Closes-bug: #1240349
Change-Id: Ib97bc01b60d7ea6c2e6bc3f0229deffbadbf18cc

keystone/openstack/common/log_handler.py

@@ -0,0 +1,31 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2013 IBM Corp.
+#
+#    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 keystone.openstack.common import notifier
+
+from oslo.config import cfg
+
+
+class PublishErrorsHandler(logging.Handler):
+    def emit(self, record):
+        if ('keystone.openstack.common.notifier.log_notifier' in
+                cfg.CONF.notification_driver):
+            return
+        notifier.api.notify(None, 'error.publisher',
+                            'error_notification',
+                            notifier.api.ERROR,
+                            dict(error=record.msg))

openstack-common.conf

@@ -9,6 +9,8 @@ module=fixture
 module=importutils
 module=install_venv_common
 module=jsonutils
+module=log
+module=log_handler
 module=policy
 module=timeutils