def _send_command_with_retry(self,
command,
value=None,
sleep_time=1,
max_retries=MAX_RETRIES):
"""
Attempt to send a command up to max_retries times. Protocol state will move to ERROR if we fail to
receive a response after max_retries attempts.
@throws InstrumentTimeoutException
"""
for attempt in xrange(1, max_retries + 1):
try:
if value is None:
result = self._do_cmd_resp(command,
response_regex=TURBO_RESPONSE,
timeout=TIMEOUT)
else:
result = self._do_cmd_resp(command,
value,
response_regex=TURBO_RESPONSE,
timeout=TIMEOUT)
return result
except exceptions.InstrumentTimeoutException:
log.error('Error sending command: %s, attempt %d', command,
attempt)
time.sleep(sleep_time)
# set the error reason
self._param_dict.set_value(Parameter.ERROR_REASON,
'Unable to command the turbo')
self._driver_event(DriverAsyncEvent.CONFIG_CHANGE)
self._async_raise_fsm_event(ProtocolEvent.ERROR)
raise exceptions.InstrumentTimeoutException(
'Failed to command the turbo: %s' % command)
def _handler_scan_enter(self, *args, **kwargs):
"""
Enter the scan state. Configure the RGA, start the first scan and the scheduler.
@throws InstrumentTimeoutException
"""
for attempt in range(1, MAX_RETRIES+1):
try:
self._handler_scan_configure_rga()
self._async_raise_fsm_event(ProtocolEvent.TAKE_SCAN)
self._build_scheduler()
self._driver_event(DriverAsyncEvent.STATE_CHANGE)
return
except exceptions.InstrumentTimeoutException:
log.error('Failed to configure the RGA - attempt %d', attempt)
self._async_raise_fsm_event(ProtocolEvent.ERROR)
error = 'Failed to configure RGA and start scanning.'
self._param_dict.set_value(Parameter.ERROR_REASON, error)
self._driver_event(DriverAsyncEvent.CONFIG_CHANGE)
raise exceptions.InstrumentTimeoutException(error)