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from django.db.models import Avg, Count, Max, Min, StdDev
from main.utils import cache_function
from .models import MirrorLog, MirrorProtocol, MirrorUrl
import datetime
@cache_function(300)
def get_mirror_statuses():
cutoff_time = datetime.datetime.utcnow() - datetime.timedelta(hours=24)
protocols = MirrorProtocol.objects.exclude(protocol__iexact='rsync')
# I swear, this actually has decent performance...
urls = MirrorUrl.objects.select_related(
'mirror', 'protocol').filter(
mirror__active=True, mirror__public=True,
protocol__in=protocols).filter(
logs__check_time__gte=cutoff_time).annotate(
check_count=Count('logs'), last_sync=Max('logs__last_sync'),
last_check=Max('logs__check_time'),
duration_avg=Avg('logs__duration'),
duration_stddev=StdDev('logs__duration')
).order_by('-last_sync', '-duration_avg')
# The Django ORM makes it really hard to get actual average delay in the
# above query, so run a seperate query for it and we will process the
# results here.
times = MirrorLog.objects.filter(is_success=True, last_sync__isnull=False,
check_time__gte=cutoff_time)
delays = {}
for log in times:
d = log.check_time - log.last_sync
delays.setdefault(log.url_id, []).append(d)
for url in urls:
if url.id in delays:
url_delays = delays[url.id]
d = sum(url_delays, datetime.timedelta()) / len(url_delays)
url.delay = d
hours = d.days * 24.0 + d.seconds / 3600.0
url.score = hours + url.duration_avg + url.duration_stddev
else:
url.delay = None
url.score = None
return urls
@cache_function(300)
def get_mirror_errors():
cutoff_time = datetime.datetime.utcnow() - datetime.timedelta(hours=24)
errors = MirrorLog.objects.filter(
is_success=False, check_time__gte=cutoff_time).values(
'url__url', 'url__protocol__protocol', 'url__mirror__country',
'error').annotate(
error_count=Count('error'), last_occurred=Max('check_time')
).order_by('-last_occurred', '-error_count')
return list(errors)
# vim: set ts=4 sw=4 et:
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