class LogThread(object):
""" Separate thread for logging stuff.
It starts to log in separate thread as new instance will be done or _start() method will be called
Timer could be stopped be calling stop() method. """
def __init__(self, resources):
self._mutex = threading.RLock()
logging.info('Starting logging thread')
self._object = resources.object
self._resources = resources
db = self._resources.getDbManager()
self._log = Log(db)
self._message = Message(db)
self._plc = self._resources.plcManager
self._position = self._resources.plcManager.getPositionHelper()
self._period = resources.config.getLoggingTime()
self._altitude = None
self._start()
def _start(self):
""" Starts timer to run, function is looped by itself.
Should be interrupted by calling timer.cancel() in other case it will become a daemon """
if self._plc.isSwitchedOn():
self._doWork()
self._timer = threading.Timer(self._period, self._start)
self._timer.start()
def stop(self):
""" Thread safe method for stopping timer. It will finish as soon as timer
thread stops working and thread will be closed"""
with self._mutex:
self._timer.cancel()
self._timer.join()
def _doWork(self):
""" All logging stuff performs here. This method is calling by logging thread """
with self._mutex:
if self._resources.plcManager.isConnected():
self._log.setStarId(self._getStarId())
self._log.setMsgId(self._getMsgId())
self._log.setCurrentRaDec(*self._getCurrentRaDec())
self._log.setCurrentFocus(self._getCurrentFocus())
self._log.setTemperature(*self._getTemperature())
self._log.setAlarmStatus(self._getAlarmStatus())
self._log.setCurrentAltitude(self._getAltitude())
self._log.writeToLog()
def force(self):
with self._mutex:
self._timer.cancel()
self._timer.join()
self._start()
def updatePeriod(self, time):
""" Update logging period, period in seconds """
self._period = time
def _getStarId(self):
""" return selected object id from controller, if object is not selected return None """
object = self._resources.object
return object.getId()
def _getMsgId(self):
""" for getting current message last stored message is used """
id = self._message.getLastId()
return id
def _getCurrentRaDec(self):
""" current telescope positions are taken directly from plc """
return self._position.getCurrentPosition()
def _getAltitude(self):
if self._object.selected():
alt, az = self._object.getHorizontalPosition()
return alt.real
def _getCurrentFocus(self):
""" current telescope positions are taken directly from plc """
focus = self._position.getFocus()
return focus
def _getTemperature(self):
""" current dome and telescope temperatures """
return self._plc.getModeHelper().readTemperatures()
def _getAlarmStatus(self):
""" alarm status as a alarm codes separated by ',' """
return self._plc.readAlarmStatus()
