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434 lines (332 loc) · 16.7 KB
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# 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.
try:
import unittest2 as unittest
except ImportError:
import unittest # noqa
from mock import Mock, MagicMock, ANY
from cassandra import ConsistencyLevel
from cassandra.cluster import Session, ResponseFuture, NoHostAvailable
from cassandra.connection import Connection, ConnectionException
from cassandra.protocol import (ReadTimeoutErrorMessage, WriteTimeoutErrorMessage,
UnavailableErrorMessage, ResultMessage, QueryMessage,
OverloadedErrorMessage, IsBootstrappingErrorMessage,
PreparedQueryNotFound, PrepareMessage,
RESULT_KIND_ROWS, RESULT_KIND_SET_KEYSPACE,
RESULT_KIND_SCHEMA_CHANGE)
from cassandra.policies import RetryPolicy
from cassandra.pool import NoConnectionsAvailable
from cassandra.query import SimpleStatement
class ResponseFutureTests(unittest.TestCase):
def make_basic_session(self):
return Mock(spec=Session, row_factory=lambda *x: list(x))
def make_session(self):
session = self.make_basic_session()
session._load_balancer.make_query_plan.return_value = ['ip1', 'ip2']
session._pools.get.return_value.is_shutdown = False
return session
def make_response_future(self, session):
query = SimpleStatement("SELECT * FROM foo")
message = QueryMessage(query=query, consistency_level=ConsistencyLevel.ONE)
return ResponseFuture(session, message, query)
def make_mock_response(self, results):
return Mock(spec=ResultMessage, kind=RESULT_KIND_ROWS, results=results, paging_state=None)
def test_result_message(self):
session = self.make_basic_session()
session._load_balancer.make_query_plan.return_value = ['ip1', 'ip2']
pool = session._pools.get.return_value
pool.is_shutdown = False
connection = Mock(spec=Connection)
pool.borrow_connection.return_value = (connection, 1)
rf = self.make_response_future(session)
rf.send_request()
rf.session._pools.get.assert_called_once_with('ip1')
pool.borrow_connection.assert_called_once_with(timeout=ANY)
connection.send_msg.assert_called_once_with(rf.message, 1, cb=ANY)
rf._set_result(self.make_mock_response([{'col': 'val'}]))
result = rf.result()
self.assertEqual(result, [{'col': 'val'}])
def test_unknown_result_class(self):
session = self.make_session()
pool = session._pools.get.return_value
connection = Mock(spec=Connection)
pool.borrow_connection.return_value = (connection, 1)
rf = self.make_response_future(session)
rf.send_request()
rf._set_result(object())
self.assertRaises(ConnectionException, rf.result)
def test_set_keyspace_result(self):
session = self.make_session()
rf = self.make_response_future(session)
rf.send_request()
result = Mock(spec=ResultMessage,
kind=RESULT_KIND_SET_KEYSPACE,
results="keyspace1")
rf._set_result(result)
rf._set_keyspace_completed({})
self.assertEqual(None, rf.result())
def test_schema_change_result(self):
session = self.make_session()
rf = self.make_response_future(session)
rf.send_request()
result = Mock(spec=ResultMessage,
kind=RESULT_KIND_SCHEMA_CHANGE,
results={'keyspace': "keyspace1", "table": "table1"})
rf._set_result(result)
session.submit.assert_called_once_with(ANY, 'keyspace1', 'table1', None, ANY, rf)
def test_other_result_message_kind(self):
session = self.make_session()
rf = self.make_response_future(session)
rf.send_request()
result = object()
rf._set_result(Mock(spec=ResultMessage, kind=999, results=result))
self.assertIs(result, rf.result())
def test_read_timeout_error_message(self):
session = self.make_session()
query = SimpleStatement("SELECT * FROM foo")
query.retry_policy = Mock()
query.retry_policy.on_read_timeout.return_value = (RetryPolicy.RETHROW, None)
message = QueryMessage(query=query, consistency_level=ConsistencyLevel.ONE)
rf = ResponseFuture(session, message, query)
rf.send_request()
result = Mock(spec=ReadTimeoutErrorMessage, info={})
rf._set_result(result)
self.assertRaises(Exception, rf.result)
def test_write_timeout_error_message(self):
session = self.make_session()
query = SimpleStatement("INSERT INFO foo (a, b) VALUES (1, 2)")
query.retry_policy = Mock()
query.retry_policy.on_write_timeout.return_value = (RetryPolicy.RETHROW, None)
message = QueryMessage(query=query, consistency_level=ConsistencyLevel.ONE)
rf = ResponseFuture(session, message, query)
rf.send_request()
result = Mock(spec=WriteTimeoutErrorMessage, info={})
rf._set_result(result)
self.assertRaises(Exception, rf.result)
def test_unavailable_error_message(self):
session = self.make_session()
query = SimpleStatement("INSERT INFO foo (a, b) VALUES (1, 2)")
query.retry_policy = Mock()
query.retry_policy.on_unavailable.return_value = (RetryPolicy.RETHROW, None)
message = QueryMessage(query=query, consistency_level=ConsistencyLevel.ONE)
rf = ResponseFuture(session, message, query)
rf.send_request()
result = Mock(spec=UnavailableErrorMessage, info={})
rf._set_result(result)
self.assertRaises(Exception, rf.result)
def test_retry_policy_says_ignore(self):
session = self.make_session()
query = SimpleStatement("INSERT INFO foo (a, b) VALUES (1, 2)")
query.retry_policy = Mock()
query.retry_policy.on_unavailable.return_value = (RetryPolicy.IGNORE, None)
message = QueryMessage(query=query, consistency_level=ConsistencyLevel.ONE)
rf = ResponseFuture(session, message, query)
rf.send_request()
result = Mock(spec=UnavailableErrorMessage, info={})
rf._set_result(result)
self.assertEqual(None, rf.result())
def test_retry_policy_says_retry(self):
session = self.make_session()
pool = session._pools.get.return_value
query = SimpleStatement("INSERT INFO foo (a, b) VALUES (1, 2)")
query.retry_policy = Mock()
query.retry_policy.on_unavailable.return_value = (RetryPolicy.RETRY, ConsistencyLevel.ONE)
message = QueryMessage(query=query, consistency_level=ConsistencyLevel.QUORUM)
connection = Mock(spec=Connection)
pool.borrow_connection.return_value = (connection, 1)
rf = ResponseFuture(session, message, query)
rf.send_request()
rf.session._pools.get.assert_called_once_with('ip1')
pool.borrow_connection.assert_called_once_with(timeout=ANY)
connection.send_msg.assert_called_once_with(rf.message, 1, cb=ANY)
result = Mock(spec=UnavailableErrorMessage, info={})
rf._set_result(result)
session.submit.assert_called_once_with(rf._retry_task, True)
self.assertEqual(1, rf._query_retries)
connection = Mock(spec=Connection)
pool.borrow_connection.return_value = (connection, 2)
# simulate the executor running this
rf._retry_task(True)
# it should try again with the same host since this was
# an UnavailableException
rf.session._pools.get.assert_called_with('ip1')
pool.borrow_connection.assert_called_with(timeout=ANY)
connection.send_msg.assert_called_with(rf.message, 2, cb=ANY)
def test_retry_with_different_host(self):
session = self.make_session()
pool = session._pools.get.return_value
connection = Mock(spec=Connection)
pool.borrow_connection.return_value = (connection, 1)
rf = self.make_response_future(session)
rf.message.consistency_level = ConsistencyLevel.QUORUM
rf.send_request()
rf.session._pools.get.assert_called_once_with('ip1')
pool.borrow_connection.assert_called_once_with(timeout=ANY)
connection.send_msg.assert_called_once_with(rf.message, 1, cb=ANY)
self.assertEqual(ConsistencyLevel.QUORUM, rf.message.consistency_level)
result = Mock(spec=OverloadedErrorMessage, info={})
rf._set_result(result)
session.submit.assert_called_once_with(rf._retry_task, False)
# query_retries does not get incremented for Overloaded/Bootstrapping errors
self.assertEqual(0, rf._query_retries)
connection = Mock(spec=Connection)
pool.borrow_connection.return_value = (connection, 2)
# simulate the executor running this
rf._retry_task(False)
# it should try with a different host
rf.session._pools.get.assert_called_with('ip2')
pool.borrow_connection.assert_called_with(timeout=ANY)
connection.send_msg.assert_called_with(rf.message, 2, cb=ANY)
# the consistency level should be the same
self.assertEqual(ConsistencyLevel.QUORUM, rf.message.consistency_level)
def test_all_retries_fail(self):
session = self.make_session()
pool = session._pools.get.return_value
connection = Mock(spec=Connection)
pool.borrow_connection.return_value = (connection, 1)
rf = self.make_response_future(session)
rf.send_request()
rf.session._pools.get.assert_called_once_with('ip1')
result = Mock(spec=IsBootstrappingErrorMessage, info={})
rf._set_result(result)
# simulate the executor running this
session.submit.assert_called_once_with(rf._retry_task, False)
rf._retry_task(False)
# it should try with a different host
rf.session._pools.get.assert_called_with('ip2')
result = Mock(spec=IsBootstrappingErrorMessage, info={})
rf._set_result(result)
# simulate the executor running this
session.submit.assert_called_with(rf._retry_task, False)
rf._retry_task(False)
self.assertRaises(NoHostAvailable, rf.result)
def test_all_pools_shutdown(self):
session = self.make_basic_session()
session._load_balancer.make_query_plan.return_value = ['ip1', 'ip2']
session._pools.get.return_value.is_shutdown = True
rf = ResponseFuture(session, Mock(), Mock())
rf.send_request()
self.assertRaises(NoHostAvailable, rf.result)
def test_first_pool_shutdown(self):
session = self.make_basic_session()
session._load_balancer.make_query_plan.return_value = ['ip1', 'ip2']
# first return a pool with is_shutdown=True, then is_shutdown=False
session._pools.get.side_effect = [Mock(is_shutdown=True), Mock(is_shutdown=False)]
rf = self.make_response_future(session)
rf.send_request()
rf._set_result(self.make_mock_response([{'col': 'val'}]))
result = rf.result()
self.assertEqual(result, [{'col': 'val'}])
def test_timeout_getting_connection_from_pool(self):
session = self.make_basic_session()
session._load_balancer.make_query_plan.return_value = ['ip1', 'ip2']
# the first pool will raise an exception on borrow_connection()
exc = NoConnectionsAvailable()
first_pool = Mock(is_shutdown=False)
first_pool.borrow_connection.side_effect = exc
# the second pool will return a connection
second_pool = Mock(is_shutdown=False)
connection = Mock(spec=Connection)
second_pool.borrow_connection.return_value = (connection, 1)
session._pools.get.side_effect = [first_pool, second_pool]
rf = self.make_response_future(session)
rf.send_request()
rf._set_result(self.make_mock_response([{'col': 'val'}]))
self.assertEqual(rf.result(), [{'col': 'val'}])
# make sure the exception is recorded correctly
self.assertEqual(rf._errors, {'ip1': exc})
def test_callback(self):
session = self.make_session()
rf = self.make_response_future(session)
rf.send_request()
rf.add_callback(self.assertEqual, [{'col': 'val'}])
rf._set_result(self.make_mock_response([{'col': 'val'}]))
result = rf.result()
self.assertEqual(result, [{'col': 'val'}])
# this should get called immediately now that the result is set
rf.add_callback(self.assertEqual, [{'col': 'val'}])
def test_errback(self):
session = self.make_session()
pool = session._pools.get.return_value
connection = Mock(spec=Connection)
pool.borrow_connection.return_value = (connection, 1)
query = SimpleStatement("INSERT INFO foo (a, b) VALUES (1, 2)")
query.retry_policy = Mock()
query.retry_policy.on_unavailable.return_value = (RetryPolicy.RETHROW, None)
message = QueryMessage(query=query, consistency_level=ConsistencyLevel.ONE)
rf = ResponseFuture(session, message, query)
rf.send_request()
rf.add_errback(self.assertIsInstance, Exception)
result = Mock(spec=UnavailableErrorMessage, info={})
rf._set_result(result)
self.assertRaises(Exception, rf.result)
# this should get called immediately now that the error is set
rf.add_errback(self.assertIsInstance, Exception)
def test_add_callbacks(self):
session = self.make_session()
query = SimpleStatement("INSERT INFO foo (a, b) VALUES (1, 2)")
query.retry_policy = Mock()
query.retry_policy.on_unavailable.return_value = (RetryPolicy.RETHROW, None)
message = QueryMessage(query=query, consistency_level=ConsistencyLevel.ONE)
# test errback
rf = ResponseFuture(session, message, query)
rf.send_request()
rf.add_callbacks(
callback=self.assertEqual, callback_args=([{'col': 'val'}],),
errback=self.assertIsInstance, errback_args=(Exception,))
result = Mock(spec=UnavailableErrorMessage, info={})
rf._set_result(result)
self.assertRaises(Exception, rf.result)
# test callback
rf = ResponseFuture(session, message, query)
rf.send_request()
rf.add_callbacks(
callback=self.assertEqual, callback_args=([{'col': 'val'}],),
errback=self.assertIsInstance, errback_args=(Exception,))
rf._set_result(self.make_mock_response([{'col': 'val'}]))
self.assertEqual(rf.result(), [{'col': 'val'}])
def test_prepared_query_not_found(self):
session = self.make_session()
pool = session._pools.get.return_value
connection = Mock(spec=Connection)
pool.borrow_connection.return_value = (connection, 1)
rf = self.make_response_future(session)
rf.send_request()
session.cluster._prepared_statements = MagicMock(dict)
prepared_statement = session.cluster._prepared_statements.__getitem__.return_value
prepared_statement.query_string = "SELECT * FROM foobar"
prepared_statement.keyspace = "FooKeyspace"
rf._connection.keyspace = "FooKeyspace"
result = Mock(spec=PreparedQueryNotFound, info='a' * 16)
rf._set_result(result)
session.submit.assert_called_once()
args, kwargs = session.submit.call_args
self.assertEqual(rf._reprepare, args[-2])
self.assertIsInstance(args[-1], PrepareMessage)
self.assertEqual(args[-1].query, "SELECT * FROM foobar")
def test_prepared_query_not_found_bad_keyspace(self):
session = self.make_session()
pool = session._pools.get.return_value
connection = Mock(spec=Connection)
pool.borrow_connection.return_value = (connection, 1)
rf = self.make_response_future(session)
rf.send_request()
session.cluster._prepared_statements = MagicMock(dict)
prepared_statement = session.cluster._prepared_statements.__getitem__.return_value
prepared_statement.query_string = "SELECT * FROM foobar"
prepared_statement.keyspace = "FooKeyspace"
rf._connection.keyspace = "BarKeyspace"
result = Mock(spec=PreparedQueryNotFound, info='a' * 16)
rf._set_result(result)
self.assertRaises(ValueError, rf.result)
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