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# Copyright 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.
from tests.integration import use_singledc, greaterthanorequaldse51, BasicSharedKeyspaceUnitTestCaseRF3WM, \
DSE_VERSION, ProtocolVersion, greaterthanorequaldse60, requiredse, TestCluster
import logging
log = logging.getLogger(__name__)
import unittest
from itertools import cycle, count
from packaging.version import Version
import time
from cassandra.cluster import ExecutionProfile, ContinuousPagingOptions
from cassandra.concurrent import execute_concurrent
from cassandra.query import SimpleStatement
def setup_module():
if DSE_VERSION:
use_singledc()
@requiredse
class BaseContPagingTests():
@classmethod
def setUpClass(cls):
if not DSE_VERSION or DSE_VERSION < cls.required_dse_version:
return
cls.execution_profiles = {"CONTDEFAULT": ExecutionProfile(continuous_paging_options=ContinuousPagingOptions()),
"ONEPAGE": ExecutionProfile(
continuous_paging_options=ContinuousPagingOptions(max_pages=1)),
"MANYPAGES": ExecutionProfile(
continuous_paging_options=ContinuousPagingOptions(max_pages=10)),
"BYTES": ExecutionProfile(continuous_paging_options=ContinuousPagingOptions(
page_unit=ContinuousPagingOptions.PagingUnit.BYTES)),
"SLOW": ExecutionProfile(
continuous_paging_options=ContinuousPagingOptions(max_pages_per_second=1)), }
cls.sane_eps = ["CONTDEFAULT", "BYTES"]
@classmethod
def tearDownClass(cls):
if not DSE_VERSION or DSE_VERSION < cls.required_dse_version:
return
@classmethod
def create_cluster(cls):
cls.cluster_with_profiles = TestCluster(protocol_version=cls.protocol_version, execution_profiles=cls.execution_profiles)
cls.session_with_profiles = cls.cluster_with_profiles.connect(wait_for_all_pools=True)
statements_and_params = zip(
cycle(["INSERT INTO " + cls.ks_name + "." + cls.ks_name + " (k, v) VALUES (%s, 0)"]),
[(i,) for i in range(150)])
execute_concurrent(cls.session_with_profiles, list(statements_and_params))
cls.select_all_statement = "SELECT * FROM {0}.{0}".format(cls.ks_name)
def test_continous_paging(self):
"""
Test to ensure that various continuous paging schemes return the full set of results.
@since 3.20
@jira_ticket PYTHON-615
@expected_result various continous paging options should fetch all the results
@test_category queries
"""
for ep in self.execution_profiles.keys():
results = list(self.session_with_profiles.execute(self.select_all_statement, execution_profile= ep))
self.assertEqual(len(results), 150)
def test_page_fetch_size(self):
"""
Test to ensure that continuous paging works appropriately with fetch size.
@since 3.20
@jira_ticket PYTHON-615
@expected_result continuous paging options should work sensibly with various fetch size
@test_category queries
"""
# Since we fetch one page at a time results should match fetch size
for fetch_size in (2, 3, 7, 10, 99, 100, 101, 150):
self.session_with_profiles.default_fetch_size = fetch_size
results = list(self.session_with_profiles.execute(self.select_all_statement, execution_profile= "ONEPAGE"))
self.assertEqual(len(results), fetch_size)
# Since we fetch ten pages at a time results should match fetch size * 10
for fetch_size in (2, 3, 7, 10, 15):
self.session_with_profiles.default_fetch_size = fetch_size
results = list(self.session_with_profiles.execute(self.select_all_statement, execution_profile= "MANYPAGES"))
self.assertEqual(len(results), fetch_size*10)
# Default settings for continuous paging should be able to fetch all results regardless of fetch size
# Changing the units should, not affect the number of results, if max_pages is not set
for profile in self.sane_eps:
for fetch_size in (2, 3, 7, 10, 15):
self.session_with_profiles.default_fetch_size = fetch_size
results = list(self.session_with_profiles.execute(self.select_all_statement, execution_profile= profile))
self.assertEqual(len(results), 150)
# This should take around 3 seconds to fetch but should still complete with all results
self.session_with_profiles.default_fetch_size = 50
results = list(self.session_with_profiles.execute(self.select_all_statement, execution_profile= "SLOW"))
self.assertEqual(len(results), 150)
def test_paging_cancel(self):
"""
Test to ensure we can cancel a continuous paging session once it's started
@since 3.20
@jira_ticket PYTHON-615
@expected_result This query should be canceled before any sizable amount of results can be returned
@test_category queries
"""
self.session_with_profiles.default_fetch_size = 1
# This combination should fetch one result a second. We should see a very few results
results = self.session_with_profiles.execute_async(self.select_all_statement, execution_profile= "SLOW")
result_set =results.result()
result_set.cancel_continuous_paging()
result_lst =list(result_set)
self.assertLess(len(result_lst), 2, "Cancel should have aborted fetch immediately")
def test_con_paging_verify_writes(self):
"""
Test to validate results with a few continuous paging options
@since 3.20
@jira_ticket PYTHON-615
@expected_result all results should be returned correctly
@test_category queries
"""
prepared = self.session_with_profiles.prepare(self.select_all_statement)
for ep in self.sane_eps:
for fetch_size in (2, 3, 7, 10, 99, 100, 101, 10000):
self.session_with_profiles.default_fetch_size = fetch_size
results = self.session_with_profiles.execute(self.select_all_statement, execution_profile=ep)
result_array = set()
result_set = set()
for result in results:
result_array.add(result.k)
result_set.add(result.v)
self.assertEqual(set(range(150)), result_array)
self.assertEqual(set([0]), result_set)
statement = SimpleStatement(self.select_all_statement)
results = self.session_with_profiles.execute(statement, execution_profile=ep)
result_array = set()
result_set = set()
for result in results:
result_array.add(result.k)
result_set.add(result.v)
self.assertEqual(set(range(150)), result_array)
self.assertEqual(set([0]), result_set)
results = self.session_with_profiles.execute(prepared, execution_profile=ep)
result_array = set()
result_set = set()
for result in results:
result_array.add(result.k)
result_set.add(result.v)
self.assertEqual(set(range(150)), result_array)
self.assertEqual(set([0]), result_set)
def test_can_get_results_when_no_more_pages(self):
"""
Test to validate that the resutls can be fetched when
has_more_pages is False
@since 3.20
@jira_ticket PYTHON-946
@expected_result the results can be fetched
@test_category queries
"""
generator_expanded = []
def get_all_rows(generator, future, generator_expanded):
self.assertFalse(future.has_more_pages)
generator_expanded.extend(list(generator))
print("Setting generator_expanded to True")
future = self.session_with_profiles.execute_async("SELECT * from system.local LIMIT 10",
execution_profile="CONTDEFAULT")
future.add_callback(get_all_rows, future, generator_expanded)
time.sleep(5)
self.assertTrue(generator_expanded)
@requiredse
@greaterthanorequaldse51
class ContPagingTestsDSEV1(BaseContPagingTests, BasicSharedKeyspaceUnitTestCaseRF3WM):
@classmethod
def setUpClass(cls):
cls.required_dse_version = BaseContPagingTests.required_dse_version = Version('5.1')
if not DSE_VERSION or DSE_VERSION < cls.required_dse_version:
return
BasicSharedKeyspaceUnitTestCaseRF3WM.setUpClass()
BaseContPagingTests.setUpClass()
cls.protocol_version = ProtocolVersion.DSE_V1
cls.create_cluster()
@requiredse
@greaterthanorequaldse60
class ContPagingTestsDSEV2(BaseContPagingTests, BasicSharedKeyspaceUnitTestCaseRF3WM):
@classmethod
def setUpClass(cls):
cls.required_dse_version = BaseContPagingTests.required_dse_version = Version('6.0')
if not DSE_VERSION or DSE_VERSION < cls.required_dse_version:
return
BasicSharedKeyspaceUnitTestCaseRF3WM.setUpClass()
BaseContPagingTests.setUpClass()
more_profiles = {
"SMALL_QUEUE": ExecutionProfile(continuous_paging_options=ContinuousPagingOptions(max_queue_size=2)),
"BIG_QUEUE": ExecutionProfile(continuous_paging_options=ContinuousPagingOptions(max_queue_size=400))
}
cls.sane_eps += ["SMALL_QUEUE", "BIG_QUEUE"]
cls.execution_profiles.update(more_profiles)
cls.protocol_version = ProtocolVersion.DSE_V2
cls.create_cluster()
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