def get_scores(self, *assignments):
"""Get a list of scores for a given list of assignments"""
balancer = self.create_balancer()
return [
balancer._score(_State(self.create_cluster_topology(assignment)))
for assignment in assignments
]
def move_leadership_valid(self,
partition,
dest,
cluster_topology=None,
**kwargs):
"""Check whether or not a leader movement is allowed."""
if cluster_topology is None:
cluster_topology = self.create_cluster_topology()
balancer = self.create_balancer(cluster_topology, **kwargs)
state = _State(cluster_topology)
with mock.patch('kafka_utils.kafka_cluster_manager.cluster_info'
'.genetic_balancer.random') as random:
random.randint.side_effect = [partition, dest]
return balancer._move_leadership(state) is not None
def move_partition_valid(self,
partition,
source,
dest,
cluster_topology=None,
**kwargs):
"""Check whether or not a partition movement is allowed."""
if cluster_topology is None:
cluster_topology = self.create_cluster_topology()
balancer = self.create_balancer(cluster_topology, **kwargs)
state = _State(cluster_topology)
with mock.patch('kafka_utils.kafka_cluster_manager.cluster_info'
'.genetic_balancer.random') as random:
random.randint.side_effect = [partition, dest]
random.choice.side_effect = [source]
# balancer._move_partition returns None on failure.
return balancer._move_partition(state) is not None
def _state(self):
"""Make the default state available as self.state"""
self.state = _State(self.ct)