mirror of
https://git.anonymousland.org/anonymousland/synapse-product.git
synced 2024-10-01 08:25:44 -04:00
55 lines
1.7 KiB
Python
55 lines
1.7 KiB
Python
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# -*- coding: utf-8 -*-
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# Copyright 2015 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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class CounterMetric(object):
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def __init__(self, name, keys=[]):
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self.name = name
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self.keys = keys # OK not to clone as we never write it
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self.counts = {}
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# Scalar metrics are never empty
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if not len(keys):
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self.counts[()] = 0
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def inc(self, *values):
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if len(values) != len(self.keys):
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raise ValueError("Expected as many values to inc() as keys (%d)" %
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(len(self.keys))
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)
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# TODO: should assert that the tag values are all strings
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if values not in self.counts:
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self.counts[values] = 1
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else:
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self.counts[values] += 1
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def fetch(self):
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return dict(self.counts)
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def _render_key(self, values):
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# TODO: some kind of value escape
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return ",".join(["%s=%s" % kv for kv in zip(self.keys, values)])
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def render(self):
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if not len(self.keys):
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return ["%s %d" % (self.name, self.counts[()])]
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return ["%s{%s} %d" % (self.name, self._render_key(k), self.counts[k])
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for k in sorted(self.counts.keys())]
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