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deb-python-cassandra-driver/tests/integration/long/test_consistency.py
Michael Figuiere 31143e3cf6 Add License headers
2014-04-16 08:14:24 -07:00

286 lines
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Python

# Copyright 2013-2014 DataStax, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import struct
import traceback
import cassandra
from cassandra import ConsistencyLevel
from cassandra.cluster import Cluster
from cassandra.policies import TokenAwarePolicy, RoundRobinPolicy, \
DowngradingConsistencyRetryPolicy
from cassandra.query import SimpleStatement
from tests.integration import PROTOCOL_VERSION
from tests.integration.long.utils import force_stop, create_schema, \
wait_for_down, wait_for_up, start, CoordinatorStats
try:
import unittest2 as unittest
except ImportError:
import unittest # noqa
ALL_CONSISTENCY_LEVELS = set([
ConsistencyLevel.ANY, ConsistencyLevel.ONE, ConsistencyLevel.TWO,
ConsistencyLevel.QUORUM, ConsistencyLevel.THREE,
ConsistencyLevel.ALL, ConsistencyLevel.LOCAL_QUORUM,
ConsistencyLevel.EACH_QUORUM])
MULTI_DC_CONSISTENCY_LEVELS = set([
ConsistencyLevel.LOCAL_QUORUM, ConsistencyLevel.EACH_QUORUM])
SINGLE_DC_CONSISTENCY_LEVELS = ALL_CONSISTENCY_LEVELS - MULTI_DC_CONSISTENCY_LEVELS
class ConsistencyTests(unittest.TestCase):
def setUp(self):
self.coordinator_stats = CoordinatorStats()
def _cl_failure(self, consistency_level, e):
self.fail('Instead of success, saw %s for CL.%s:\n\n%s' % (
e, ConsistencyLevel.value_to_name[consistency_level],
traceback.format_exc()))
def _cl_expected_failure(self, cl):
self.fail('Test passed at ConsistencyLevel.%s:\n\n%s' % (
ConsistencyLevel.value_to_name[cl], traceback.format_exc()))
def _insert(self, session, keyspace, count, consistency_level=ConsistencyLevel.ONE):
session.execute('USE %s' % keyspace)
for i in range(count):
ss = SimpleStatement('INSERT INTO cf(k, i) VALUES (0, 0)',
consistency_level=consistency_level)
session.execute(ss)
def _query(self, session, keyspace, count, consistency_level=ConsistencyLevel.ONE):
routing_key = struct.pack('>i', 0)
for i in range(count):
ss = SimpleStatement('SELECT * FROM cf WHERE k = 0',
consistency_level=consistency_level,
routing_key=routing_key)
self.coordinator_stats.add_coordinator(session.execute_async(ss))
def _assert_writes_succeed(self, session, keyspace, consistency_levels):
for cl in consistency_levels:
self.coordinator_stats.reset_counts()
try:
self._insert(session, keyspace, 1, cl)
except Exception as e:
self._cl_failure(cl, e)
def _assert_reads_succeed(self, session, keyspace, consistency_levels, expected_reader=3):
for cl in consistency_levels:
self.coordinator_stats.reset_counts()
try:
self._query(session, keyspace, 1, cl)
for i in range(3):
if i == expected_reader:
self.coordinator_stats.assert_query_count_equals(self, i, 1)
else:
self.coordinator_stats.assert_query_count_equals(self, i, 0)
except Exception as e:
self._cl_failure(cl, e)
def _assert_writes_fail(self, session, keyspace, consistency_levels):
for cl in consistency_levels:
self.coordinator_stats.reset_counts()
try:
self._insert(session, keyspace, 1, cl)
self._cl_expected_failure(cl)
except (cassandra.Unavailable, cassandra.WriteTimeout):
pass
def _assert_reads_fail(self, session, keyspace, consistency_levels):
for cl in consistency_levels:
self.coordinator_stats.reset_counts()
try:
self._query(session, keyspace, 1, cl)
self._cl_expected_failure(cl)
except (cassandra.Unavailable, cassandra.ReadTimeout):
pass
def _test_tokenaware_one_node_down(self, keyspace, rf, accepted):
cluster = Cluster(
load_balancing_policy=TokenAwarePolicy(RoundRobinPolicy()),
protocol_version=PROTOCOL_VERSION)
session = cluster.connect()
wait_for_up(cluster, 1, wait=False)
wait_for_up(cluster, 2)
create_schema(session, keyspace, replication_factor=rf)
self._insert(session, keyspace, count=1)
self._query(session, keyspace, count=1)
self.coordinator_stats.assert_query_count_equals(self, 1, 0)
self.coordinator_stats.assert_query_count_equals(self, 2, 1)
self.coordinator_stats.assert_query_count_equals(self, 3, 0)
try:
force_stop(2)
wait_for_down(cluster, 2)
self._assert_writes_succeed(session, keyspace, accepted)
self._assert_reads_succeed(session, keyspace,
accepted - set([ConsistencyLevel.ANY]))
self._assert_writes_fail(session, keyspace,
SINGLE_DC_CONSISTENCY_LEVELS - accepted)
self._assert_reads_fail(session, keyspace,
SINGLE_DC_CONSISTENCY_LEVELS - accepted)
finally:
start(2)
wait_for_up(cluster, 2)
def test_rfone_tokenaware_one_node_down(self):
self._test_tokenaware_one_node_down(
keyspace='test_rfone_tokenaware',
rf=1,
accepted=set([ConsistencyLevel.ANY]))
def test_rftwo_tokenaware_one_node_down(self):
self._test_tokenaware_one_node_down(
keyspace='test_rftwo_tokenaware',
rf=2,
accepted=set([ConsistencyLevel.ANY, ConsistencyLevel.ONE]))
def test_rfthree_tokenaware_one_node_down(self):
self._test_tokenaware_one_node_down(
keyspace='test_rfthree_tokenaware',
rf=3,
accepted=set([ConsistencyLevel.ANY, ConsistencyLevel.ONE,
ConsistencyLevel.TWO, ConsistencyLevel.QUORUM]))
def test_rfthree_tokenaware_none_down(self):
keyspace = 'test_rfthree_tokenaware_none_down'
cluster = Cluster(
load_balancing_policy=TokenAwarePolicy(RoundRobinPolicy()),
protocol_version=PROTOCOL_VERSION)
session = cluster.connect()
wait_for_up(cluster, 1, wait=False)
wait_for_up(cluster, 2)
create_schema(session, keyspace, replication_factor=3)
self._insert(session, keyspace, count=1)
self._query(session, keyspace, count=1)
self.coordinator_stats.assert_query_count_equals(self, 1, 0)
self.coordinator_stats.assert_query_count_equals(self, 2, 1)
self.coordinator_stats.assert_query_count_equals(self, 3, 0)
self.coordinator_stats.reset_counts()
self._assert_writes_succeed(session, keyspace, SINGLE_DC_CONSISTENCY_LEVELS)
self._assert_reads_succeed(session, keyspace,
SINGLE_DC_CONSISTENCY_LEVELS - set([ConsistencyLevel.ANY]),
expected_reader=2)
def _test_downgrading_cl(self, keyspace, rf, accepted):
cluster = Cluster(
load_balancing_policy=TokenAwarePolicy(RoundRobinPolicy()),
default_retry_policy=DowngradingConsistencyRetryPolicy(),
protocol_version=PROTOCOL_VERSION)
session = cluster.connect()
create_schema(session, keyspace, replication_factor=rf)
self._insert(session, keyspace, 1)
self._query(session, keyspace, 1)
self.coordinator_stats.assert_query_count_equals(self, 1, 0)
self.coordinator_stats.assert_query_count_equals(self, 2, 1)
self.coordinator_stats.assert_query_count_equals(self, 3, 0)
try:
force_stop(2)
wait_for_down(cluster, 2)
self._assert_writes_succeed(session, keyspace, accepted)
self._assert_reads_succeed(session, keyspace,
accepted - set([ConsistencyLevel.ANY]))
self._assert_writes_fail(session, keyspace,
SINGLE_DC_CONSISTENCY_LEVELS - accepted)
self._assert_reads_fail(session, keyspace,
SINGLE_DC_CONSISTENCY_LEVELS - accepted)
finally:
start(2)
wait_for_up(cluster, 2)
def test_rfone_downgradingcl(self):
self._test_downgrading_cl(
keyspace='test_rfone_downgradingcl',
rf=1,
accepted=set([ConsistencyLevel.ANY]))
def test_rftwo_downgradingcl(self):
self._test_downgrading_cl(
keyspace='test_rftwo_downgradingcl',
rf=2,
accepted=SINGLE_DC_CONSISTENCY_LEVELS)
def test_rfthree_roundrobin_downgradingcl(self):
keyspace = 'test_rfthree_roundrobin_downgradingcl'
cluster = Cluster(
load_balancing_policy=RoundRobinPolicy(),
default_retry_policy=DowngradingConsistencyRetryPolicy(),
protocol_version=PROTOCOL_VERSION)
self.rfthree_downgradingcl(cluster, keyspace, True)
def test_rfthree_tokenaware_downgradingcl(self):
keyspace = 'test_rfthree_tokenaware_downgradingcl'
cluster = Cluster(
load_balancing_policy=TokenAwarePolicy(RoundRobinPolicy()),
default_retry_policy=DowngradingConsistencyRetryPolicy(),
protocol_version=PROTOCOL_VERSION)
self.rfthree_downgradingcl(cluster, keyspace, False)
def rfthree_downgradingcl(self, cluster, keyspace, roundrobin):
session = cluster.connect()
create_schema(session, keyspace, replication_factor=2)
self._insert(session, keyspace, count=12)
self._query(session, keyspace, count=12)
if roundrobin:
self.coordinator_stats.assert_query_count_equals(self, 1, 4)
self.coordinator_stats.assert_query_count_equals(self, 2, 4)
self.coordinator_stats.assert_query_count_equals(self, 3, 4)
else:
self.coordinator_stats.assert_query_count_equals(self, 1, 0)
self.coordinator_stats.assert_query_count_equals(self, 2, 12)
self.coordinator_stats.assert_query_count_equals(self, 3, 0)
try:
self.coordinator_stats.reset_counts()
force_stop(2)
wait_for_down(cluster, 2)
self._assert_writes_succeed(session, keyspace, SINGLE_DC_CONSISTENCY_LEVELS)
# Test reads that expected to complete successfully
for cl in SINGLE_DC_CONSISTENCY_LEVELS - set([ConsistencyLevel.ANY]):
self.coordinator_stats.reset_counts()
self._query(session, keyspace, 12, consistency_level=cl)
if roundrobin:
self.coordinator_stats.assert_query_count_equals(self, 1, 6)
self.coordinator_stats.assert_query_count_equals(self, 2, 0)
self.coordinator_stats.assert_query_count_equals(self, 3, 6)
else:
self.coordinator_stats.assert_query_count_equals(self, 1, 0)
self.coordinator_stats.assert_query_count_equals(self, 2, 0)
self.coordinator_stats.assert_query_count_equals(self, 3, 12)
finally:
start(2)
wait_for_up(cluster, 2)
# TODO: can't be done in this class since we reuse the ccm cluster
# instead we should create these elsewhere
# def test_rfthree_downgradingcl_twodcs(self):
# def test_rfthree_downgradingcl_twodcs_dcaware(self):