def __init__(self, driver_event):
super(Protocol, self).__init__(driver_event)
self._protocol_fsm = ThreadSafeFSM(ProtocolState, ProtocolEvent,
ProtocolEvent.ENTER, ProtocolEvent.EXIT)
handlers = {
ProtocolState.UNKNOWN: (
(ProtocolEvent.ENTER, self._handler_unknown_enter),
(ProtocolEvent.EXIT, self._handler_unknown_exit),
(ProtocolEvent.DISCOVER, self._handler_unknown_discover),
),
ProtocolState.COMMAND: (
(ProtocolEvent.ENTER, self._handler_command_enter),
(ProtocolEvent.EXIT, self._handler_command_exit),
(ProtocolEvent.GET, self._handler_get),
(ProtocolEvent.SET, self._handler_set),
(ProtocolEvent.START_AUTOSAMPLE, self._handler_command_start_autosample),
),
ProtocolState.AUTOSAMPLE: (
(ProtocolEvent.ENTER, self._handler_autosample_enter),
(ProtocolEvent.EXIT, self._handler_autosample_exit),
(ProtocolEvent.GET, self._handler_get),
(ProtocolEvent.FLUSH, self._flush),
(ProtocolEvent.STOP_AUTOSAMPLE, self._handler_autosample_stop_autosample),
),
ProtocolState.WRITE_ERROR: (
(ProtocolEvent.ENTER, self._handler_write_error_enter),
(ProtocolEvent.EXIT, self._handler_write_error_exit),
(ProtocolEvent.CLEAR_WRITE_ERROR, self._handler_clear_write_error),
)}
for state in handlers:
for event, handler in handlers[state]:
self._protocol_fsm.add_handler(state, event, handler)
# Build dictionaries for driver schema
self._build_param_dict()
self._build_command_dict()
self._build_driver_dict()
# State state machine in UNKNOWN state.
self._protocol_fsm.start(ProtocolState.UNKNOWN)
self._logs = {}
self._filled_logs = []
self._pickle_cache = []
# persistent store, cannot initialize until startup config has been applied
# since we need the address for postgres
self._persistent_store = None
# lock for flush actions to prevent writing or altering the data files
# during flush
self._lock = Lock()
self._pktid = 0
