def __init__(self, host, station_api_port, station_info, proxy=None):
self.host = host
self.station_api_port = station_api_port
if not hasattr(self, '_station_info'):
logging.debug('Creating new Station (%s) at %s:%s',
station_info.station_id, host, station_api_port)
# We're not reusing a shared instance, initialize things we need.
self._history = history.History()
self.cached_tests = {}
self._lock = threading.Lock()
elif self._station_info != station_info:
_LOG.warning(
'Reusing Station (%s) with new StationInfo: %s, clearing History.',
self._station_info.station_id, station_info)
self._history = history.History()
self.cached_tests = {}
self._station_info = station_info
# Shared proxy used for synchronous calls we expect to be fast.
# Long-polling calls should use make_proxy() to create a new ServerProxy
# object each time, to avoid blocking short requests with long-running ones.
self._shared_proxy = proxy or self.make_proxy()
# Lock was acquired at the beginning of __new__().
self.STATION_LOCK.release()
def reachable(self):
"""Returns True if the station is reachable, also updates StationInfo."""
try:
station_info = StationInfo(**self._shared_proxy.get_station_info())
except socket.error:
return False
if self._station_info.station_id and self._station_info != station_info:
_LOG.warning(
'Reusing Station (%s) with new StationInfo: %s, clearing History.',
self._station_info.station_id, station_info)
self._history = history.History()
# Update our local StationInfo.
self._station_info = station_info
return True