def run(self):
"""Run the report."""
report_start = time.time()
columns = self._definition.get('columns', [])
items = self._definition.get('items', [])
with self.csv_scope() as csv_scope:
# Iterate over items in definition.
for item in items:
m = Meter(self._client,
item['meter_name'],
max_samples=self.max_samples)
# Meter.read() returns a generator that yields readings.
# One reading per resource/meter pair
for reading in m.read(start=self._start, stop=self._stop):
reading.convert(item.get('conversion'))
line_item = {
c.get('name'): self._encode(
self._field_function(c.get('func'), item, reading))
for c in columns
}
csv_scope.writerow(line_item)
elapsed = time.time() - report_start
logger.info('Report is at {}'.format(self.output.location))
logger.debug('Finished report in {} seconds'.format(elapsed))
class MeterDaemon(Daemon):
def __init__(self, pid):
self.logger = logging.getLogger(__name__)
self.logger.setLevel(logging.INFO)
##create a file handler
handler = logging.FileHandler('/var/log/meterd.log')
handler.setLevel(logging.INFO)
##create a logging format
formatter = logging.Formatter('%(asctime)s - '
+ '%(name)s - '
+ '%(levelname)s - '
+ '%(message)s')
handler.setFormatter(formatter)
##add the handlers to the logger
self.logger.addHandler(handler)
self.logger.info('Logging started...')
self.logger.info('Pid is:' + pid)
super(MeterDaemon, self).__init__(pid)
self.m = Meter('/dev/ttyUSB0',
57600,
8,
'mastermeter',
'watts',
self.logger)
def run(self):
self.m.open()
self.logger.debug('Meter open.')
while 1:
self.m.read()
self.m.parse()
self.m.submit()
time.sleep(6)
def stop(self):
self.m.close()
self.logger.debug('Meter close.')
super(MeterDaemon, self).stop()
