class EmuApplication(OxiTopApplication):
"""
%prog [options] bottles-xml
This utility emulates an OxiTop OC110 data dummy_logger for the purposes of
easy development without access to an actual OC110. The bottle data served
by the emulator is specified in an XML-based file which can be generated
using oxitopdump or oxitopview with a real unit.
"""
def __init__(self):
super(EmuApplication, self).__init__()
self.handle_sigint = None
self.handle_sigterm = None
self.parser.set_defaults(
daemon=False,
)
self.parser.add_option(
'-d', '--daemon', dest='daemon', action='store_true',
help='if specified, start the emulator as a background daemon')
def main(self, options, args):
if options.port == 'TEST':
self.parser.error('Cannot use TEST serial port with the emulator')
if not args:
# Use a default bottles definition file if none was specified
args = [os.path.join(os.path.dirname(__file__), 'example.xml')]
if len(args) == 1:
with io.open(args[0], 'r') as bottles_file:
bottles_xml = fromstring(bottles_file.read())
else:
self.parser.error(
'You may only specify a single bottles definition file')
bottles = [
Bottle.from_xml(tostring(bottle))
for bottle in bottles_xml.findall('bottle')
]
logging.info('Opening serial port %s' % options.port)
port = serial.Serial(
options.port, baudrate=9600, bytesize=serial.EIGHTBITS,
parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE,
timeout=5, rtscts=True)
files_preserve = [port]
for handler in logging.getLogger().handlers:
if isinstance(handler, logging.FileHandler):
files_preserve.append(handler.stream)
if not options.daemon:
files_preserve.append(sys.stderr)
with DaemonContext(
files_preserve=files_preserve,
# The following odd construct is to ensure detachment only
# where sensible (see default setting of detach_process)
detach_process=None if options.daemon else False,
stdout=None if options.daemon else sys.stdout,
stderr=None if options.daemon else sys.stderr,
signal_map={
signal.SIGTERM: self.terminate,
signal.SIGINT: self.interrupt,
}):
logging.info('Starting emulator loop')
self.dummy_logger = DummyLogger(port, bottles)
# Loop around waiting for the dummy logger thread to terminate. If
# we attempt to simply join() here then the thread blocks and the
# signal handlers below never get a chance to execute
try:
while self.dummy_logger.is_alive():
self.dummy_logger.join(0.1)
except (SystemExit, KeyboardInterrupt) as exc:
pass
logging.info('Waiting for emulator loop to finish')
self.dummy_logger.join()
logging.info('Exiting')
def terminate(self, signum, frame):
logging.info('Received SIGTERM')
self.dummy_logger.terminated = True
def interrupt(self, signum, frame):
logging.info('Received SIGINT')
self.dummy_logger.terminated = True
class EmuApplication(OxiTopApplication):
"""
%prog [options] bottles-xml
This utility emulates an OxiTop OC110 data dummy_logger for the purposes of
easy development without access to an actual OC110. The bottle data served
by the emulator is specified in an XML-based file which can be generated
using oxitopdump or oxitopview with a real unit.
"""
def __init__(self):
super(EmuApplication, self).__init__()
self.handle_sigint = None
self.handle_sigterm = None
self.parser.set_defaults(daemon=False, )
self.parser.add_option(
'-d',
'--daemon',
dest='daemon',
action='store_true',
help='if specified, start the emulator as a background daemon')
def main(self, options, args):
if options.port == 'TEST':
self.parser.error('Cannot use TEST serial port with the emulator')
if not args:
# Use a default bottles definition file if none was specified
args = [os.path.join(os.path.dirname(__file__), 'example.xml')]
if len(args) == 1:
with io.open(args[0], 'r') as bottles_file:
bottles_xml = fromstring(bottles_file.read())
else:
self.parser.error(
'You may only specify a single bottles definition file')
bottles = [
Bottle.from_xml(tostring(bottle))
for bottle in bottles_xml.findall('bottle')
]
logging.info('Opening serial port %s' % options.port)
port = serial.Serial(options.port,
baudrate=9600,
bytesize=serial.EIGHTBITS,
parity=serial.PARITY_NONE,
stopbits=serial.STOPBITS_ONE,
timeout=5,
rtscts=True)
files_preserve = [port]
for handler in logging.getLogger().handlers:
if isinstance(handler, logging.FileHandler):
files_preserve.append(handler.stream)
if not options.daemon:
files_preserve.append(sys.stderr)
with DaemonContext(
files_preserve=files_preserve,
# The following odd construct is to ensure detachment only
# where sensible (see default setting of detach_process)
detach_process=None if options.daemon else False,
stdout=None if options.daemon else sys.stdout,
stderr=None if options.daemon else sys.stderr,
signal_map={
signal.SIGTERM: self.terminate,
signal.SIGINT: self.interrupt,
}):
logging.info('Starting emulator loop')
self.dummy_logger = DummyLogger(port, bottles)
# Loop around waiting for the dummy logger thread to terminate. If
# we attempt to simply join() here then the thread blocks and the
# signal handlers below never get a chance to execute
try:
while self.dummy_logger.is_alive():
self.dummy_logger.join(0.1)
except (SystemExit, KeyboardInterrupt) as exc:
pass
logging.info('Waiting for emulator loop to finish')
self.dummy_logger.join()
logging.info('Exiting')
def terminate(self, signum, frame):
logging.info('Received SIGTERM')
self.dummy_logger.terminated = True
def interrupt(self, signum, frame):
logging.info('Received SIGINT')
self.dummy_logger.terminated = True
