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# Copyright (C) 2014 Aleksey Lim
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os
import time
import logging
from sugar_network.toolkit.rrd import Rrd
from sugar_network.toolkit.router import route, postroute, Request
from sugar_network.toolkit.coroutine import this
from sugar_network.toolkit import Option, coroutine, enforce
stats = Option(
'collect unpersonalized node statistics',
default=False, type_cast=Option.bool_cast, action='store_true')
stats_step = Option(
'step interval in seconds for RRD statistics database',
default=60 * 5, type_cast=int)
stats_rras = Option(
'comma separated list of RRAs for RRD statistics database',
default=[
'RRA:AVERAGE:0.5:1:864', # 3d with 5min step
'RRA:AVERAGE:0.5:288:3660', # 10y with 1d step
'RRA:AVERAGE:0.5:2880:366', # 10y with 10d step
'RRA:AVERAGE:0.5:8640:122', # 10y with 30d step
'RRA:AVERAGE:0.5:105120:10', # 10y with 1y step
],
type_cast=Option.list_cast, type_repr=Option.list_repr)
_HEARTBEAT_EVER = 60 * 60 * 24 * 365
_DS = {
'contexts': {
'type': 'GAUGE',
'heartbeat': _HEARTBEAT_EVER,
'resource': 'context',
'query': {},
},
'released': {
'type': 'ABSOLUTE',
},
'solved': {
'type': 'ABSOLUTE',
},
'reported': {
'type': 'ABSOLUTE',
},
'topics': {
'type': 'GAUGE',
'heartbeat': _HEARTBEAT_EVER,
'resource': 'user',
'query': {'topic': ''},
},
'posts': {
'type': 'GAUGE',
'heartbeat': _HEARTBEAT_EVER,
'resource': 'user',
'query': {'not_topic': ''},
},
'users': {
'type': 'GAUGE',
'heartbeat': _HEARTBEAT_EVER,
'resource': 'user',
'query': {},
},
}
_ROUTES = {
('POST', 'context', None, None):
('contexts', +1),
('DELETE', 'context', None, None):
('contexts', -1),
('POST', 'context', 'releases', None):
('released', +1),
('GET', 'context', None, 'solve'):
('solved', +1),
('POST', 'report', None, None):
('reported', +1),
('POST', 'post', None, None):
(lambda: 'posts' if this.resource['topic'] else 'topics', +1),
('DELETE', 'post', None, None):
(lambda: 'posts' if this.resource['topic'] else 'topics', -1),
('POST', 'user', None, None):
('users', +1),
('DELETE', 'user', None, None):
('users', -1),
}
_MAX_STAT_RECORDS = 100
_logger = logging.getLogger('node.stats')
class StatRoutes(object):
_rrd = None
_stats = None
_rating = None
_stated = False
def stats_init(self, path, step, rras):
_logger.info('Collect node stats in %r', path)
self._rrd = Rrd(path, 'stats', _DS, step, rras)
self._stats = self._rrd.values()
self._rating = {'context': {}, 'post': {}}
if not self._stats:
for field, traits in _DS.items():
value = 0
if traits['type'] == 'GAUGE':
directory = this.volume[traits['resource']]
__, value = directory.find(limit=0, **traits['query'])
self._stats[field] = value
@postroute
def stat_on_postroute(self, result, exception, stat_rating=True):
if self._rrd is None or exception is not None:
return result
r = this.request
route_ = _ROUTES.get((r.method, r.resource, r.prop, r.cmd))
if route_ is None:
return result
stat, shift = route_
self._stated = True
if not isinstance(stat, basestring):
stat = stat()
self._stats[stat] += shift
if stat_rating and r.method == 'POST' and r.resource == 'post':
rating = None
if stat == 'topics' and this.resource['type'] == 'review':
rating = self._rating['context']
rating = rating.setdefault(this.resource['context'], [0, 0])
else:
rating = self._rating['post']
rating = rating.setdefault(this.resource['topic'], [0, 0])
if rating is not None:
rating[0] += shift
rating[1] += shift * this.resource['vote']
return result
@route('GET', cmd='stats', arguments={
'start': int, 'end': int, 'records': int, 'source': list},
mime_type='application/json')
def stats(self, start, end, records, source):
enforce(self._rrd is not None, 'Statistics disabled')
if not start:
start = self._rrd.first or 0
if not end:
end = self._rrd.last or 0
if records > _MAX_STAT_RECORDS:
_logger.debug('Decrease %d stats records number to %d',
records, _MAX_STAT_RECORDS)
records = _MAX_STAT_RECORDS
elif records <= 0:
records = _MAX_STAT_RECORDS / 10
resolution = max(1, (end - start) / records)
result = []
for ts, values in self._rrd.get(start, end, resolution):
if source:
values = dict([(i, values[i]) for i in source])
result.append((ts, values))
return result
def stats_auto_commit(self):
while True:
coroutine.sleep(self._rrd.step)
self.stats_commit()
def stats_commit(self, timestamp=None):
if not self._stated:
return
self._stated = False
_logger.trace('Commit stats')
self._rrd.put(self._stats, timestamp)
for field, traits in _DS.items():
if traits['type'] == 'ABSOLUTE':
self._stats[field] = 0
for resource, stats_ in self._rating.items():
directory = this.volume[resource]
for guid, (votes, reviews) in stats_.items():
rating = directory[guid]['rating']
directory.update(guid, {
'rating': [rating[0] + votes, rating[1] + reviews],
})
stats_.clear()
def stats_regen(self, path, step, rras):
for i in Rrd(path, 'stats', _DS, step, rras).files:
os.unlink(i)
self.stats_init(path, step, rras)
for field in self._stats:
self._stats[field] = 0
def timeline(ts):
ts = long(ts)
end = long(time.time())
step_ = None
archives = {}
for rra in rras:
a_step, a_size = [long(i) for i in rra.split(':')[-2:]]
a_step *= step
a_start = end - min(end, a_step * a_size)
if archives.setdefault(a_start, a_step) > a_step:
archives[a_start] = a_step
archives = list(sorted(archives.items()))
while ts <= end:
while not step_ or archives and ts >= archives[0][0]:
archive_start, step_ = archives.pop(0)
ts = max(ts / step_ * step_, archive_start)
yield ts, ts + step_ - 1, step_
ts += step_
items, __ = this.volume['context'].find(limit=1, order_by='ctime')
start = next(items)['ctime']
for left, right, __ in timeline(start):
for resource in ('user', 'context', 'post', 'report'):
items, __ = this.volume[resource].find(
query='ctime:%s..%s' % (left, right))
for this.resource in items:
this.request = Request(method='POST', path=[resource])
self.stat_on_postroute(None, None, False)
self.stats_commit(left + (right - left) / 2)
def stats_regen_rating(self, path, step, rras):
def calc_rating(**kwargs):
rating = [0, 0]
alldocs, __ = this.volume['post'].find(**kwargs)
for post in alldocs:
rating[0] += 1
rating[1] += post['vote']
return rating
alldocs, __ = this.volume['context'].find()
for context in alldocs:
rating = calc_rating(type='review', context=context.guid)
this.volume['context'].update(context.guid, {'rating': rating})
alldocs, __ = this.volume['post'].find(topic='')
for topic in alldocs:
rating = calc_rating(topic=topic.guid)
this.volume['post'].update(topic.guid, {'rating': rating})
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