00eaa1096d
Oslo.messaging library is not required by OSProfiler core. It is needed by "messaging" driver only and thus can be turn into runtime dependency (just like client libs for other drivers). Change-Id: Ie42cd0fdd5e96ce65b83edf934a139c282d1e784
69 lines
2.7 KiB
Python
69 lines
2.7 KiB
Python
# Copyright 2016 Mirantis Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from oslo_utils import importutils
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from osprofiler.drivers import base
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class Messaging(base.Driver):
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def __init__(self, connection_str, project=None, service=None, host=None,
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context=None, conf=None, **kwargs):
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"""Driver sending notifications via message queues."""
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oslo_messaging = importutils.try_import("oslo_messaging")
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if not oslo_messaging:
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raise ValueError("Oslo.messaging library is required for "
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"messaging driver")
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super(Messaging, self).__init__(connection_str, project=project,
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service=service, host=host)
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self.context = context
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transport = oslo_messaging.get_notification_transport(conf)
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self.client = oslo_messaging.Notifier(
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transport, publisher_id=self.host, driver="messaging",
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topics=["profiler"], retry=0)
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@classmethod
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def get_name(cls):
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return "messaging"
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def notify(self, info, context=None):
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"""Send notifications to backend via oslo.messaging notifier API.
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:param info: Contains information about trace element.
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In payload dict there are always 3 ids:
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"base_id" - uuid that is common for all notifications
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related to one trace. Used to simplify
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retrieving of all trace elements from
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Ceilometer.
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"parent_id" - uuid of parent element in trace
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"trace_id" - uuid of current element in trace
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With parent_id and trace_id it's quite simple to build
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tree of trace elements, which simplify analyze of trace.
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:param context: request context that is mostly used to specify
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current active user and tenant.
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"""
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info["project"] = self.project
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info["service"] = self.service
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self.client.info(context or self.context,
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"profiler.%s" % info["service"],
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info)
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