119 lines
4.6 KiB
Python
119 lines
4.6 KiB
Python
# 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 time
|
|
from unittest import mock
|
|
|
|
from oslo_cache import _memcache_pool
|
|
from six.moves import queue
|
|
import testtools
|
|
from testtools import matchers
|
|
|
|
from keystonemiddleware.tests.unit import utils
|
|
|
|
|
|
class _TestConnectionPool(_memcache_pool.ConnectionPool):
|
|
destroyed_value = 'destroyed'
|
|
|
|
def _create_connection(self):
|
|
return mock.MagicMock()
|
|
|
|
def _destroy_connection(self, conn):
|
|
conn(self.destroyed_value)
|
|
|
|
|
|
class TestConnectionPool(utils.TestCase):
|
|
def setUp(self):
|
|
super(TestConnectionPool, self).setUp()
|
|
self.unused_timeout = 10
|
|
self.maxsize = 2
|
|
self.connection_pool = _TestConnectionPool(
|
|
maxsize=self.maxsize,
|
|
unused_timeout=self.unused_timeout)
|
|
|
|
def test_get_context_manager(self):
|
|
self.assertThat(self.connection_pool.queue, matchers.HasLength(0))
|
|
with self.connection_pool.acquire() as conn:
|
|
self.assertEqual(1, self.connection_pool._acquired)
|
|
self.assertEqual(0, self.connection_pool._acquired)
|
|
self.assertThat(self.connection_pool.queue, matchers.HasLength(1))
|
|
self.assertEqual(conn, self.connection_pool.queue[0].connection)
|
|
|
|
def test_cleanup_pool(self):
|
|
self.test_get_context_manager()
|
|
newtime = time.time() + self.unused_timeout * 2
|
|
non_expired_connection = _memcache_pool._PoolItem(
|
|
ttl=(newtime * 2),
|
|
connection=mock.MagicMock())
|
|
self.connection_pool.queue.append(non_expired_connection)
|
|
self.assertThat(self.connection_pool.queue, matchers.HasLength(2))
|
|
with mock.patch.object(time, 'time', return_value=newtime):
|
|
conn = self.connection_pool.queue[0].connection
|
|
with self.connection_pool.acquire():
|
|
pass
|
|
conn.assert_has_calls(
|
|
[mock.call(self.connection_pool.destroyed_value)])
|
|
self.assertThat(self.connection_pool.queue, matchers.HasLength(1))
|
|
self.assertEqual(0, non_expired_connection.connection.call_count)
|
|
|
|
def test_acquire_conn_exception_returns_acquired_count(self):
|
|
class TestException(Exception):
|
|
pass
|
|
|
|
with mock.patch.object(_TestConnectionPool, '_create_connection',
|
|
side_effect=TestException):
|
|
with testtools.ExpectedException(TestException):
|
|
with self.connection_pool.acquire():
|
|
pass
|
|
self.assertThat(self.connection_pool.queue,
|
|
matchers.HasLength(0))
|
|
self.assertEqual(0, self.connection_pool._acquired)
|
|
|
|
def test_connection_pool_limits_maximum_connections(self):
|
|
# NOTE(morganfainberg): To ensure we don't lockup tests until the
|
|
# job limit, explicitly call .get_nowait() and .put_nowait() in this
|
|
# case.
|
|
conn1 = self.connection_pool.get_nowait()
|
|
conn2 = self.connection_pool.get_nowait()
|
|
|
|
# Use a nowait version to raise an Empty exception indicating we would
|
|
# not get another connection until one is placed back into the queue.
|
|
self.assertRaises(queue.Empty, self.connection_pool.get_nowait)
|
|
|
|
# Place the connections back into the pool.
|
|
self.connection_pool.put_nowait(conn1)
|
|
self.connection_pool.put_nowait(conn2)
|
|
|
|
# Make sure we can get a connection out of the pool again.
|
|
self.connection_pool.get_nowait()
|
|
|
|
def test_connection_pool_maximum_connection_get_timeout(self):
|
|
connection_pool = _TestConnectionPool(
|
|
maxsize=1,
|
|
unused_timeout=self.unused_timeout,
|
|
conn_get_timeout=0)
|
|
|
|
def _acquire_connection():
|
|
with connection_pool.acquire():
|
|
pass
|
|
|
|
# Make sure we've consumed the only available connection from the pool
|
|
conn = connection_pool.get_nowait()
|
|
|
|
self.assertRaises(_memcache_pool.exception.QueueEmpty,
|
|
_acquire_connection)
|
|
|
|
# Put the connection back and ensure we can acquire the connection
|
|
# after it is available.
|
|
connection_pool.put_nowait(conn)
|
|
_acquire_connection()
|