class ConnectedEnough(object):
def __init__(self, storage_farm_broker, threshold):
self._broker = storage_farm_broker
self._threshold = int(threshold)
if self._threshold <= 0:
raise ValueError("threshold must be positive")
self._threshold_passed = False
self._observers = OneShotObserverList()
self._broker.on_servers_changed(self._check_enough_connected)
def when_connected_enough(self):
"""
:returns: a Deferred that fires if/when our high water mark for
number of connected servers becomes (or ever was) above
"threshold".
"""
if self._threshold_passed:
return defer.succeed(None)
return self._observers.when_fired()
def _check_enough_connected(self):
"""
internal helper
"""
if self._threshold_passed:
return
num_servers = len(self._broker.get_connected_servers())
if num_servers >= self._threshold:
self._threshold_passed = True
self._observers.fire(None)
class ConnectedEnough(object):
def __init__(self, storage_farm_broker, threshold):
self._broker = storage_farm_broker
self._threshold = int(threshold)
if self._threshold <= 0:
raise ValueError("threshold must be positive")
self._threshold_passed = False
self._observers = OneShotObserverList()
self._broker.on_servers_changed(self._check_enough_connected)
def when_connected_enough(self):
"""
:returns: a Deferred that fires if/when our high water mark for
number of connected servers becomes (or ever was) above
"threshold".
"""
if self._threshold_passed:
return defer.succeed(None)
return self._observers.when_fired()
def _check_enough_connected(self):
"""
internal helper
"""
if self._threshold_passed:
return
num_servers = len(self._broker.get_connected_servers())
if num_servers >= self._threshold:
self._threshold_passed = True
self._observers.fire(None)
def __init__(self, storage_farm_broker, threshold):
self._broker = storage_farm_broker
self._threshold = int(threshold)
if self._threshold <= 0:
raise ValueError("threshold must be positive")
self._threshold_passed = False
self._observers = OneShotObserverList()
self._broker.on_servers_changed(self._check_enough_connected)
def __init__(self, storage_farm_broker, threshold):
self._broker = storage_farm_broker
self._threshold = int(threshold)
if self._threshold <= 0:
raise ValueError("threshold must be positive")
self._threshold_passed = False
self._observers = OneShotObserverList()
self._broker.on_servers_changed(self._check_enough_connected)
