Source code for ceilometer.transformer.accumulator

# Copyright 2013 Julien Danjou
# 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
# 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.

from ceilometer import transformer

[docs]class TransformerAccumulator(transformer.TransformerBase): """Transformer that accumulates samples until a threshold. And then flushes them out into the wild. """ grouping_keys = ['resource_id'] def __init__(self, size=1, **kwargs): if size >= 1: self.samples = [] self.size = size super(TransformerAccumulator, self).__init__(**kwargs)
[docs] def handle_sample(self, context, sample): if self.size >= 1: self.samples.append(sample) else: return sample
[docs] def flush(self, context): if len(self.samples) >= self.size: x = self.samples self.samples = [] return x return []

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