def start_io_thread(self):
self.io_thread = IOThread(self)
self.io_thread.start()
class HwioServer(object):
DEFAULT_SETTINGS = {
'debug': False,
'http_port': 8040,
'tick': 1.0,
}
def __init__(self, name, devices, signals, settings = None):
self.name = name
self.devices = devices
self.signals = signals
self.settings = HwioServer.DEFAULT_SETTINGS
if type(settings) is dict:
self.settings.update(settings)
self.http_thread = None
self.io_thread = None
self.terminate = False
# save global instance
HwioServer._instance = self
# logger
self.log = logging.getLogger('HwioServer')
self.log.setLevel(logging.DEBUG)
ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)
formatter = logging.Formatter('%(asctime)s.%(msecs)03d [%(levelname)-09s] %(message)s', '%Y-%m-%d %H:%M:%S')
ch.setFormatter(formatter)
self.log.addHandler(ch)
@classmethod
def instance(cls):
"""Returns a global HwioServer instance."""
if not hasattr(cls, "_instance"):
raise ValueError('Global HwioServer instance is None')
return cls._instance
def start(self):
# start all devices
self.log.info('starting all devices...')
for device in self.devices.values():
self.log.debug('starting {0} device'.format(device.id))
device.start()
# catch SIGINT handler
signal.signal(signal.SIGINT, sigint_handler)
# start io reading thread
self.log.info('starting io thread');
self.start_io_thread()
# start http server thread
self.log.info('starting http server');
self.start_http_server()
self.wait_loop()
def start_http_server(self):
self.http_thread = HttpServerThread(self)
self.http_thread.start()
def start_io_thread(self):
self.io_thread = IOThread(self)
self.io_thread.start()
def wait_loop(self):
while True:
if self.terminate:
break
else:
time.sleep(1)
self.shutdown()
self.log.info('bye!')
def shutdown(self):
# shutdown http server
self.log.debug('shutdown http server')
self.http_thread.finish()
self.http_thread.join()
# shutdown io thread
self.log.debug('shutdown io thread')
self.io_thread.finish()
self.io_thread.join()