def send_command(self, command_args):
""" Send given command to control node and wait for an answer
:param command_args: command arguments
:type command_args: list of string
:return: received answers or `None` if timeout caught
"""
command_str = ' '.join(command_args) + '\n'
with self._send_mutex:
# remove existing items (old not treated answers)
common.empty_queue(self.msgs)
try:
LOGGER.debug('control_node_cmd: %r', command_args)
self.process.stdin.write(command_str)
# wait for answer 1 second at max
answer_cn = self.msgs.get(block=True, timeout=1.0)
except queue.Empty:
LOGGER.error('control_node_serial answer timeout')
answer_cn = None
except AttributeError:
LOGGER.error('control_node_serial stdin is None')
answer_cn = None
except IOError:
LOGGER.error('control_node_serial process is terminated')
answer_cn = None
finally:
LOGGER.debug('control_node_answer: %r', answer_cn)
return answer_cn
def send_command(self, command_args):
""" Send given command to control node and wait for an answer
:param command_args: command arguments
:type command_args: list of string
:return: received answers or `None` if timeout caught
"""
command_str = ' '.join(command_args) + '\n'
with self._send_mutex:
# remove existing items (old not treated answers)
common.empty_queue(self.msgs)
try:
LOGGER.debug('control_node_cmd: %r', command_args)
self.process.stdin.write(command_str)
# wait for answer 1 second at max
answer_cn = self.msgs.get(block=True, timeout=1.0)
except Queue.Empty:
LOGGER.error('control_node_serial answer timeout')
answer_cn = None
except AttributeError:
LOGGER.error('control_node_serial stdin is None')
answer_cn = None
except IOError:
LOGGER.error('control_node_serial process is terminated')
answer_cn = None
finally:
LOGGER.debug('control_node_answer: %r', answer_cn)
return answer_cn
def start(self, oml_xml_config=None):
"""Start control node interface.
Run `control node serial program` and handle its answers.
"""
common.empty_queue(self._wait_ready)
args = self._cn_interface_args(oml_xml_config)
self.process = subprocess_timeout.Popen(args, stderr=PIPE, stdin=PIPE)
self.reader_thread = threading.Thread(target=self._reader)
self.reader_thread.start()
ret = self._wait_ready.get()
return ret
def start(self, oml_xml_config=None):
"""Start control node interface.
Run `control node serial program` and handle its answers.
"""
common.empty_queue(self._wait_ready)
args = self._cn_interface_args(oml_xml_config)
self.process = subprocess_timeout.Popen(args, stderr=PIPE, stdin=PIPE)
self.reader_thread = threading.Thread(target=self._reader)
self.reader_thread.start()
ret = self._wait_ready.get()
return ret
