37 lines
1.4 KiB
Python
37 lines
1.4 KiB
Python
import datetime
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def compute_resource_usage(data):
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""" Computes MonitorData.used based on related monitors """
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resource = data.resource
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result = 0
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has_result = False
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for dataset in data.get_monitor_datasets():
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if resource.period == resource.MONTHLY_AVG:
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last = dataset.latest()
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epoch = datetime(
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year=today.year,
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month=today.month,
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day=1,
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tzinfo=timezone.utc
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)
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total = (last.created_at-epoch).total_seconds()
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ini = epoch
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for data in dataset:
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slot = (data.created_at-ini).total_seconds()
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result += data.value * slot/total
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ini = data.created_at
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elif resource.period == resource.MONTHLY_SUM:
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# FIXME Aggregation of 0s returns None! django bug?
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# value = dataset.aggregate(models.Sum('value'))['value__sum']
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values = dataset.values_list('value', flat=True)
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if values:
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has_result = True
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result += sum(values)
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elif resource.period == resource.LAST:
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result = dataset.value
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has_result = True
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else:
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raise NotImplementedError("%s support not implemented" % data.period)
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return float(result)/resource.get_scale() if has_result else None
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