mirror of https://github.com/zulip/zulip.git
102 lines
2.9 KiB
Python
102 lines
2.9 KiB
Python
# -*- coding: utf-8 -*-
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from __future__ import absolute_import
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import base64
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import hashlib
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import os
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from time import sleep
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from django.conf import settings
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def statsd_key(val, clean_periods=False):
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if not isinstance(val, str):
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val = str(val)
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if ':' in val:
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val = val.split(':')[0]
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val = val.replace('-', "_")
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if clean_periods:
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val = val.replace('.', '_')
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return val
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class StatsDWrapper(object):
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"""Transparently either submit metrics to statsd
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or do nothing without erroring out"""
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# Backported support for gauge deltas
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# as our statsd server supports them but supporting
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# pystatsd is not released yet
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def _our_gauge(self, stat, value, rate=1, delta=False):
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"""Set a gauge value."""
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from django_statsd.clients import statsd
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if delta:
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value = '%+g|g' % (value,)
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else:
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value = '%g|g' % (value,)
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statsd._send(stat, value, rate)
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def __getattr__(self, name):
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# Hand off to statsd if we have it enabled
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# otherwise do nothing
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if name in ['timer', 'timing', 'incr', 'decr', 'gauge']:
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if settings.USING_STATSD:
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from django_statsd.clients import statsd
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if name == 'gauge':
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return self._our_gauge
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else:
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return getattr(statsd, name)
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else:
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return lambda *args, **kwargs: None
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raise AttributeError
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statsd = StatsDWrapper()
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# Runs the callback with slices of all_list of a given batch_size
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def run_in_batches(all_list, batch_size, callback, sleep_time = 0, logger = None):
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if len(all_list) == 0:
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return
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limit = (len(all_list) / batch_size) + 1;
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for i in xrange(limit):
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start = i*batch_size
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end = (i+1) * batch_size
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if end >= len(all_list):
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end = len(all_list)
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batch = all_list[start:end]
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if logger:
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logger("Executing %s in batch %s of %s" % (end-start, i+1, limit))
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callback(batch)
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if i != limit - 1:
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sleep(sleep_time)
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def make_safe_digest(string, hash_func=hashlib.sha1):
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"""
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return a hex digest of `string`.
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"""
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# hashlib.sha1, md5, etc. expect bytes, so non-ASCII strings must
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# be encoded.
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return hash_func(string.encode('utf-8')).hexdigest()
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def log_statsd_event(name):
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"""
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Sends a single event to statsd with the desired name and the current timestamp
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This can be used to provide vertical lines in generated graphs,
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for example when doing a prod deploy, bankruptcy request, or
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other one-off events
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Note that to draw this event as a vertical line in graphite
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you can use the drawAsInfinite() command
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"""
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event_name = "events.%s" % (name,)
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statsd.incr(event_name)
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def generate_random_token(length):
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return base64.b16encode(os.urandom(length / 2)).lower()
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