30e23e7ff5
Change-Id: I75d8e9603ae12aa89fe465ce438dd79fa475e48e Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
89 lines
2.9 KiB
Python
89 lines
2.9 KiB
Python
# Copyright 2020 LINE Corp.
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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_log import log as logging # type: ignore
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from oslo_utils import importutils
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from oslo_metrics import message_type
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LOG = logging.getLogger(__name__)
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MODULE_LISTS = ["oslo_metrics.metrics.oslo_messaging"]
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class MessageRouter:
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def __init__(self) -> None:
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self.modules = {}
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for m_str in MODULE_LISTS:
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mod = importutils.try_import(m_str, False)
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if not mod:
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LOG.error("Failed to load module %s", m_str)
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self.modules[m_str.split('.')[-1]] = mod
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def process(self, raw_string: bytes) -> None:
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try:
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metric = message_type.Metric.from_json(raw_string.decode())
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self.dispatch(metric)
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except Exception as e:
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LOG.error("Failed to parse: %s", e)
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def dispatch(self, metric: message_type.Metric) -> None:
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if metric.module not in self.modules:
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LOG.error("Failed to lookup modules by %s", metric.module)
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return
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mod = self.modules.get(metric.module)
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# Get metric
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try:
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metric_definition = getattr(mod, metric.name)
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except AttributeError as e:
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LOG.error("Failed to load metrics {}: {}", metric.name, e)
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return
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# Get labels
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try:
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metric_with_label = getattr(metric_definition, "labels")
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metric_with_label = metric_with_label(**metric.labels)
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except AttributeError as e:
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LOG.error(
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"Failed to load labels func from metrics %s: %s",
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metric.name,
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e,
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)
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return
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LOG.debug("Get labels with {}: {}", metric.name, metric.labels)
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# perform action
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try:
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embed_action = getattr(metric_with_label, metric.action.action)
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if metric.action.value is not None:
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embed_action(metric.action.value)
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else:
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embed_action()
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except AttributeError as e:
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LOG.error(
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"Failed to perform metric actionv %s, %s: %s",
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metric.action.action,
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metric.action.value,
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e,
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)
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return
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LOG.debug(
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"Perform action %s for %s metrics",
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metric.action.action,
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metric.name,
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)
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