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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.
import warnings
import pytest
from cassandra.cqlengine import columns
from cassandra.cqlengine.management import drop_table, sync_table
from cassandra.cqlengine.models import Model
from cassandra.cqlengine.query import BatchQuery
from tests.integration.cqlengine.base import BaseCassEngTestCase
from unittest.mock import patch
class TestMultiKeyModel(Model):
partition = columns.Integer(primary_key=True)
cluster = columns.Integer(primary_key=True)
count = columns.Integer(required=False)
text = columns.Text(required=False)
class BatchQueryTests(BaseCassEngTestCase):
@classmethod
def setUpClass(cls):
super(BatchQueryTests, cls).setUpClass()
drop_table(TestMultiKeyModel)
sync_table(TestMultiKeyModel)
@classmethod
def tearDownClass(cls):
super(BatchQueryTests, cls).tearDownClass()
drop_table(TestMultiKeyModel)
def setUp(self):
super(BatchQueryTests, self).setUp()
self.pkey = 1
for obj in TestMultiKeyModel.filter(partition=self.pkey):
obj.delete()
def test_insert_success_case(self):
b = BatchQuery()
TestMultiKeyModel.batch(b).create(partition=self.pkey, cluster=2, count=3, text='4')
with self.assertRaises(TestMultiKeyModel.DoesNotExist):
TestMultiKeyModel.get(partition=self.pkey, cluster=2)
b.execute()
TestMultiKeyModel.get(partition=self.pkey, cluster=2)
def test_update_success_case(self):
inst = TestMultiKeyModel.create(partition=self.pkey, cluster=2, count=3, text='4')
b = BatchQuery()
inst.count = 4
inst.batch(b).save()
inst2 = TestMultiKeyModel.get(partition=self.pkey, cluster=2)
self.assertEqual(inst2.count, 3)
b.execute()
inst3 = TestMultiKeyModel.get(partition=self.pkey, cluster=2)
self.assertEqual(inst3.count, 4)
def test_delete_success_case(self):
inst = TestMultiKeyModel.create(partition=self.pkey, cluster=2, count=3, text='4')
b = BatchQuery()
inst.batch(b).delete()
TestMultiKeyModel.get(partition=self.pkey, cluster=2)
b.execute()
with self.assertRaises(TestMultiKeyModel.DoesNotExist):
TestMultiKeyModel.get(partition=self.pkey, cluster=2)
def test_context_manager(self):
with BatchQuery() as b:
for i in range(5):
TestMultiKeyModel.batch(b).create(partition=self.pkey, cluster=i, count=3, text='4')
for i in range(5):
with self.assertRaises(TestMultiKeyModel.DoesNotExist):
TestMultiKeyModel.get(partition=self.pkey, cluster=i)
for i in range(5):
TestMultiKeyModel.get(partition=self.pkey, cluster=i)
def test_bulk_delete_success_case(self):
for i in range(1):
for j in range(5):
TestMultiKeyModel.create(partition=i, cluster=j, count=i*j, text='{0}:{1}'.format(i,j))
with BatchQuery() as b:
TestMultiKeyModel.objects.batch(b).filter(partition=0).delete()
self.assertEqual(TestMultiKeyModel.filter(partition=0).count(), 5)
self.assertEqual(TestMultiKeyModel.filter(partition=0).count(), 0)
#cleanup
for m in TestMultiKeyModel.all():
m.delete()
def test_empty_batch(self):
b = BatchQuery()
b.execute()
with BatchQuery() as b:
pass
class BatchQueryCallbacksTests(BaseCassEngTestCase):
def test_API_managing_callbacks(self):
# Callbacks can be added at init and after
def my_callback(*args, **kwargs):
pass
# adding on init:
batch = BatchQuery()
batch.add_callback(my_callback)
batch.add_callback(my_callback, 2, named_arg='value')
batch.add_callback(my_callback, 1, 3)
self.assertEqual(batch._callbacks, [
(my_callback, (), {}),
(my_callback, (2,), {'named_arg':'value'}),
(my_callback, (1, 3), {})
])
def test_callbacks_properly_execute_callables_and_tuples(self):
call_history = []
def my_callback(*args, **kwargs):
call_history.append(args)
# adding on init:
batch = BatchQuery()
batch.add_callback(my_callback)
batch.add_callback(my_callback, 'more', 'args')
batch.execute()
self.assertEqual(len(call_history), 2)
self.assertEqual([(), ('more', 'args')], call_history)
def test_callbacks_tied_to_execute(self):
"""Batch callbacks should NOT fire if batch is not executed in context manager mode"""
call_history = []
def my_callback(*args, **kwargs):
call_history.append(args)
with BatchQuery() as batch:
batch.add_callback(my_callback)
self.assertEqual(len(call_history), 1)
class SomeError(Exception):
pass
with self.assertRaises(SomeError):
with BatchQuery() as batch:
batch.add_callback(my_callback)
# this error bubbling up through context manager
# should prevent callback runs (along with b.execute())
raise SomeError
# still same call history. Nothing added
self.assertEqual(len(call_history), 1)
# but if execute ran, even with an error bubbling through
# the callbacks also would have fired
with self.assertRaises(SomeError):
with BatchQuery(execute_on_exception=True) as batch:
batch.add_callback(my_callback)
raise SomeError
# updated call history
self.assertEqual(len(call_history), 2)
def test_callbacks_work_multiple_times(self):
"""
Tests that multiple executions of execute on a batch statement
logs a warning, and that we don't encounter an attribute error.
@since 3.1
@jira_ticket PYTHON-445
@expected_result warning message is logged
@test_category object_mapper
"""
call_history = []
def my_callback(*args, **kwargs):
call_history.append(args)
with pytest.warns() as w:
with BatchQuery() as batch:
batch.add_callback(my_callback)
batch.execute()
batch.execute()
self.assertEqual(len(w), 2) # package filter setup to warn always
self.assertRegex(str(w[0].message), r"^Batch.*multiple.*")
def test_disable_multiple_callback_warning(self):
"""
Tests that multiple executions of a batch statement
don't log a warning when warn_multiple_exec flag is set, and
that we don't encounter an attribute error.
@since 3.1
@jira_ticket PYTHON-445
@expected_result warning message is logged
@test_category object_mapper
"""
call_history = []
def my_callback(*args, **kwargs):
call_history.append(args)
with patch('cassandra.cqlengine.query.BatchQuery.warn_multiple_exec', False):
with warnings.catch_warnings(record=True) as w:
with BatchQuery() as batch:
batch.add_callback(my_callback)
batch.execute()
batch.execute()
self.assertFalse(w)
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