def unload_community(self):
if __debug__: dprint()
super(EffortCommunity, self).unload_community()
# unsubscribe from events. 22/03/13 Boudewijn: Dispersy is not allowed to call swift
# because it may cause database locks if people incorrectly keep the session locked.
temp_thread = Callback()
temp_thread.register(self._swift.set_subscribe_channel_close, ("ALL", False, self.i2ithread_channel_close))
temp_thread.register(temp_thread.stop)
temp_thread.start("Temporary-EffortCommunity")
# cancel outstanding pings
for ping_candidate in self._slope.itervalues():
self._dispersy.callback.unregister(ping_candidate.callback_id)
self._slope = {}
# store all cached observations
self._database.executemany(u"INSERT OR REPLACE INTO observation (member, timestamp, effort) VALUES (?, ?, ?)",
[(database_id, history.origin, buffer(history.bytes)) for database_id, history in self._observations.iteritems()])
# update all up and download values
self.download_state_callback([], closing=True)
# store all cached bandwidth guesses
self._database.executemany(u"INSERT OR REPLACE INTO bandwidth_guess (ip, member, timestamp, upload, download) VALUES (?, ?, ?, ?, ?)",
[(unicode(ip), guess.member.database_id if guess.member else 0, guess.timestamp, int(guess.upload), int(guess.download)) for ip, guess in self._bandwidth_guesses.iteritems()])
def __init__(self, master, swift_process):
# original walker callbacks (will be set during super(...).__init__)
self._original_on_introduction_request = None
self._original_on_introduction_response = None
super(EffortCommunity, self).__init__(master)
# _SWIFT is a SwiftProcess instance (allowing us to schedule CLOSE_EVENT callbacks)
self._swift = swift_process
# subscribe to events. 22/03/13 Boudewijn: Dispersy is not allowed to call swift because it
# may cause database locks if people incorrectly keep the session locked.
temp_thread = Callback()
temp_thread.register(self._swift.set_subscribe_channel_close, ("ALL", True, self.i2ithread_channel_close))
temp_thread.register(temp_thread.stop)
temp_thread.start("Temporary-EffortCommunity")
# _DATABASE stores all direct observations and indirect hearsay
self._database = EffortDatabase.get_instance(self._dispersy)
# _OBSERVATIONS cache (reduce _DATABASE access)
self._observations_length = 512
self._observations = OrderedDict()
# _bandwidth_guesses cache (reduce _DATABASE access)
self._bandwidth_guesses_length = 512
self._bandwidth_guesses = OrderedDict()
# _DOWNLOAD_STATES contains all peers that are currently downloading. when we determine
# that a peer is missing, we will update its bandwidth statistics
self._download_states = dict()
self._swift_raw_bytes_up = 0
self._swift_raw_bytes_down = 0
# _SLOPE contains the promising members as Member:RecordCandidate
self._slope_length = 10
self._slope = {}
# _SIGNATURE_COUNT is the number of members that will be asked to sign
self._signature_count = 5
# simple statistics
self._statistic_incoming_signature_request_success = 0
self._statistic_outgoing_signature_request = 0
self._statistic_outgoing_signature_request_success = 0
self._statistic_outgoing_signature_request_timeout = 0
self._statistic_member_ordering_fail = 0
self._statistic_initial_timestamp_fail = 0
self._statistic_cycle_fail = 0
self._has_been_killed = False
# wait till next time we can create records with the candidates on our slope
self._pending_callbacks.append(self._dispersy.callback.register(self._periodically_create_records))
self._pending_callbacks.append(self._dispersy.callback.register(self._periodically_push_statistics))
self._pending_callbacks.append(self._dispersy.callback.register(self._periodically_cleanup_database))
