Source code for pywws.livelog

# pywws - Python software for USB Wireless Weather Stations
# Copyright (C) 2008-18  pywws contributors

# 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. This
script can also be run with the ``pywws-livelog`` command. ::
For more information on using ``pywws.livelog``, see


from __future__ import absolute_import, print_function

__docformat__ = "restructuredtext en"
__usage__ = """
 usage: %s [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. ~/weather/data)
__doc__ %= __usage__ % ('python -m pywws.livelog')

from datetime import datetime
import getopt
import logging
import os
import signal
import sys
import time

import pywws.localisation
import pywws.logdata
import pywws.logger
import pywws.process
import pywws.regulartasks

logger = logging.getLogger(__name__)

[docs]def signal_handler(signum, frame): if signum == signal.SIGTERM: raise KeyboardInterrupt if signum == signal.SIGHUP: raise NotImplementedError
[docs]def live_log(data_dir): # set up signal handlers signal.signal(signal.SIGHUP, signal_handler) signal.signal(signal.SIGTERM, signal_handler) with, live_logging=True) as context: # localise application pywws.localisation.set_application_language(context.params) # create a DataLogger object datalogger = pywws.logdata.DataLogger(context) # create a RegularTasks object tasks = pywws.regulartasks.RegularTasks(context) try: # fetch and process any new logged data datalogger.log_data() pywws.process.process_data(context) # get live data for data, logged in datalogger.live_data( logged_only=(not tasks.has_live_tasks())): if logged: # process new data pywws.process.process_data(context) # do tasks tasks.do_tasks() else: tasks.do_live(data) except KeyboardInterrupt: return 0 except NotImplementedError: return 3 except Exception as ex: logger.exception(ex) return 1 return 0
[docs]def main(argv=None): if argv is None: argv = sys.argv usage = (__usage__ % (argv[0])).strip() try: opts, args = getopt.getopt(argv[1:], "hl:v", ['help', 'log=', 'verbose']) except getopt.error as msg: print('Error: %s\n' % msg, file=sys.stderr) print(usage, file=sys.stderr) return 1 # process options logfile = None verbose = 0 for o, a in opts: if o in ('-h', '--help'): print(__doc__.split('\n\n')[0]) print(usage) return 0 elif o in ('-l', '--log'): logfile = a elif o in ('-v', '--verbose'): verbose += 1 # check arguments if len(args) != 1: print('Error: 1 argument required\n', file=sys.stderr) print(usage, file=sys.stderr) return 2 pywws.logger.setup_handler(verbose, logfile) return live_log(args[0])
if __name__ == "__main__": try: sys.exit(main()) except KeyboardInterrupt: pass except Exception as e: logger.exception(str(e))