Code source de pywws.LiveLog

#!/usr/bin/env python

# pywws - Python software for USB Wireless Weather Stations
# Copyright (C) 2008-13  Jim Easterbrook

# 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 2
# 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
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

"""Get weather data, store it, and process it.

Run this continuously, having set what tasks are to be done. ::


For more information on using ````, see


__docformat__ = "restructuredtext en"
__usage__ = """
 usage: python -m pywws.LiveLog [options] data_dir
 options are:
  -h      or --help      display this help
  -l file or --log file  write log information to file
  -v      or --verbose   increase amount of reassuring messages
 data_dir is the root directory of the weather data (e.g. /data/weather)
__doc__ %= __usage__
__usage__ = __doc__.split('\n')[0] + __usage__

from datetime import datetime, timedelta
import getopt
import logging
import os
import sys
import time

from pywws import DataStore
from pywws import Localisation
from pywws.LogData import Catchup, CheckFixedBlock
from pywws.Logger import ApplicationLogger
from pywws import Process
from pywws import Tasks
from pywws import WeatherStation

[docs]def LiveLog(data_dir): logger = logging.getLogger('pywws.LiveLog') params = DataStore.params(data_dir) status = DataStore.status(data_dir) # localise application Localisation.SetApplicationLanguage(params) # connect to weather station ws_type = params.get('fixed', 'ws type') if ws_type: params.unset('fixed', 'ws type') params.set('config', 'ws type', ws_type) ws_type = params.get('config', 'ws type', '1080') ws = WeatherStation.weather_station( ws_type=ws_type, params=params, status=status) fixed_block = CheckFixedBlock(ws, params, status, logger) # open data file stores raw_data = DataStore.data_store(data_dir) calib_data = DataStore.calib_store(data_dir) hourly_data = DataStore.hourly_store(data_dir) daily_data = DataStore.daily_store(data_dir) monthly_data = DataStore.monthly_store(data_dir) # create a RegularTasks object asynch = eval(params.get('config', 'asynchronous', 'False')) tasks = Tasks.RegularTasks( params, status, calib_data, hourly_data, daily_data, monthly_data, asynch=asynch) # get time of last logged data last_stored = raw_data.before(datetime.max) if last_stored == None: last_stored = datetime.min if datetime.utcnow() < last_stored: raise ValueError('Computer time is earlier than last stored data') last_stored += timedelta(minutes=2) # get live data next_hour = datetime.utcnow().replace( minute=0, second=0, microsecond=0) + Process.HOUR next_ptr = None try: for data, ptr, logged in ws.live_data( logged_only=(not tasks.has_live_tasks())): now = data['idx'] if logged: if ptr == next_ptr: # data is contiguous with last logged value raw_data[now] = data else: # catch up missing data Catchup(ws, logger, raw_data, now, ptr) next_ptr = ws.inc_ptr(ptr) # process new data Process.Process(params, status, raw_data, calib_data, hourly_data, daily_data, monthly_data) # do tasks tasks.do_tasks() if now >= next_hour: next_hour += Process.HOUR fixed_block = CheckFixedBlock(ws, params, status, logger) # save any unsaved data raw_data.flush() else: tasks.do_live(data) finally: tasks.stop_thread() return 0
[docs]def main(argv=None): if argv is None: argv = sys.argv try: opts, args = getopt.getopt(argv[1:], "hl:v", ['help', 'log=', 'verbose']) except getopt.error, msg: print >>sys.stderr, 'Error: %s\n' % msg print >>sys.stderr, __usage__.strip() return 1 # process options logfile = None verbose = 0 for o, a in opts: if o in ('-h', '--help'): print __usage__.strip() return 0 elif o in ('-l', '--log'): logfile = a elif o in ('-v', '--verbose'): verbose += 1 # check arguments if len(args) != 1: print >>sys.stderr, 'Error: 1 argument required\n' print >>sys.stderr, __usage__.strip() return 2 logger = ApplicationLogger(verbose, logfile) return LiveLog(args[0])
if __name__ == "__main__": logger = logging.getLogger('pywws') try: sys.exit(main()) except KeyboardInterrupt: pass except Exception, e: logger.exception(str(e))