53 lines
2.0 KiB
Python
53 lines
2.0 KiB
Python
# (C) Copyright 2017 SUSE LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from cassandra.auth import PlainTextAuthProvider
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from cassandra.cluster import Cluster
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from cassandra.cluster import ConsistencyLevel
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from cassandra.cluster import DCAwareRoundRobinPolicy
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from cassandra.cluster import TokenAwarePolicy
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from oslo_config import cfg
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from monasca_persister.repositories.cassandra.retry_policy import MonascaRetryPolicy
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conf = cfg.CONF
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def create_cluster():
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user = conf.cassandra.user
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if user:
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auth_provider = PlainTextAuthProvider(username=user, password=conf.cassandra.password)
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else:
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auth_provider = None
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contact_points = [ip.dest for ip in conf.cassandra.contact_points]
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cluster = Cluster(contact_points,
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port=conf.cassandra.port,
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auth_provider=auth_provider,
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connect_timeout=conf.cassandra.connection_timeout,
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load_balancing_policy=TokenAwarePolicy(
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DCAwareRoundRobinPolicy(local_dc=conf.cassandra.local_data_center)),
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)
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cluster.default_retry_policy = MonascaRetryPolicy(1, conf.cassandra.max_write_retries,
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conf.cassandra.max_write_retries)
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return cluster
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def create_session(cluster):
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session = cluster.connect(conf.cassandra.keyspace)
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session.default_timeout = conf.cassandra.read_timeout
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session.default_consistency_level = \
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ConsistencyLevel.name_to_value[conf.cassandra.consistency_level]
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return session
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