syncplay/syncplay/utils.py
2012-12-29 12:37:54 +01:00

77 lines
2.8 KiB
Python

import time
import re
import datetime
from syncplay import constants
def retry(ExceptionToCheck, tries=4, delay=3, backoff=2, logger=None):
"""Retry calling the decorated function using an exponential backoff.
http://www.saltycrane.com/blog/2009/11/trying-out-retry-decorator-python/
original from: http://wiki.python.org/moin/PythonDecoratorLibrary#Retry
:param ExceptionToCheck: the exception to check. may be a tuple of
excpetions to check
:type ExceptionToCheck: Exception or tuple
:param tries: number of times to try (not retry) before giving up
:type tries: int
:param delay: initial delay between retries in seconds
:type delay: int
:param backoff: backoff multiplier e.g. value of 2 will double the delay
each retry
:type backoff: int
:param logger: logger to use. If None, print
:type logger: logging.Logger instance
"""
def deco_retry(f):
def f_retry(*args, **kwargs):
mtries, mdelay = tries, delay
try_one_last_time = True
while mtries > 1:
try:
return f(*args, **kwargs)
try_one_last_time = False
break
except ExceptionToCheck, e:
if logger:
msg = "%s, Retrying in %d seconds..." % (str(e), mdelay)
logger.warning(msg)
time.sleep(mdelay)
mtries -= 1
mdelay *= backoff
if try_one_last_time:
return f(*args, **kwargs)
return
return f_retry # true decorator
return deco_retry
def parseTime(timeStr):
regex = re.compile(constants.PARSE_TIME_REGEX)
parts = regex.match(timeStr)
if not parts:
return
parts = parts.groupdict()
time_params = {}
for (name, param) in parts.iteritems():
if param:
if(name == "miliseconds"):
time_params["microseconds"] = int(param) * 1000
else:
time_params[name] = int(param)
return datetime.timedelta(**time_params).total_seconds()
def formatTime(timeInSeconds):
timeInSeconds = round(timeInSeconds)
weeks = timeInSeconds // 604800
days = (timeInSeconds % 604800) // 86400
hours = (timeInSeconds % 86400) // 3600
minutes = (timeInSeconds % 3600) // 60
seconds = timeInSeconds % 60
if(weeks > 0):
return '{0:.0f}w, {1:.0f}d, {2:02.0f}:{3:02.0f}:{4:02.0f}'.format(weeks, days, hours, minutes, seconds)
elif(days > 0):
return '{0:.0f}d, {1:02.0f}:{2:02.0f}:{3:02.0f}'.format(days, hours, minutes, seconds)
elif(hours > 0):
return '{0:02.0f}:{1:02.0f}:{2:02.0f}'.format(hours, minutes, seconds)
else:
return '{0:02.0f}:{1:02.0f}'.format(minutes, seconds)