本文整理汇总了Python中cassandra.pool.HostConnectionPool类的典型用法代码示例。如果您正苦于以下问题：Python HostConnectionPool类的具体用法？Python HostConnectionPool怎么用？Python HostConnectionPool使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了HostConnectionPool类的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: test_failed_wait_for_connection
def test_failed_wait_for_connection(self):
host = Mock(spec=Host, address='ip1')
session = self.make_session()
conn = NonCallableMagicMock(spec=Connection, in_flight=0, is_defunct=False, is_closed=False)
session.cluster.connection_factory.return_value = conn
pool = HostConnectionPool(host, HostDistance.LOCAL, session)
session.cluster.connection_factory.assert_called_once_with(host.address)
pool.borrow_connection(timeout=0.01)
self.assertEqual(1, conn.in_flight)
conn.in_flight = MAX_STREAM_PER_CONNECTION
# we're already at the max number of requests for this connection,
# so we this should fail
self.assertRaises(NoConnectionsAvailable, pool.borrow_connection, 0)示例2: test_borrow_and_return
def test_borrow_and_return(self):
host = Mock(spec=Host, address='ip1')
session = self.make_session()
conn = NonCallableMagicMock(spec=Connection, in_flight=0, is_defunct=False, is_closed=False)
session.cluster.connection_factory.return_value = conn
pool = HostConnectionPool(host, HostDistance.LOCAL, session)
session.cluster.connection_factory.assert_called_once_with(host.address)
c = pool.borrow_connection(timeout=0.01)
self.assertIs(c, conn)
self.assertEqual(1, conn.in_flight)
conn.set_keyspace_blocking.assert_called_once_with('foobarkeyspace')
pool.return_connection(conn)
self.assertEqual(0, conn.in_flight)
self.assertNotIn(conn, pool._trash)示例3: test_return_closed_connection
def test_return_closed_connection(self):
host = Mock(spec=Host, address='ip1')
session = self.make_session()
conn = NonCallableMagicMock(spec=Connection, in_flight=0, is_defunct=False, is_closed=True)
session.cluster.connection_factory.return_value = conn
pool = HostConnectionPool(host, HostDistance.LOCAL, session)
session.cluster.connection_factory.assert_called_once_with(host.address)
pool.borrow_connection(timeout=0.01)
conn.is_closed = True
session.cluster.signal_connection_failure.return_value = False
pool.return_connection(conn)
# a new creation should be scheduled
session.submit.assert_called_once()
self.assertFalse(pool.is_shutdown)示例4: test_all_connections_trashed
def test_all_connections_trashed(self):
host = Mock(spec=Host, address='ip1')
session = self.make_session()
conn = NonCallableMagicMock(spec=Connection, in_flight=0, is_defunct=False, is_closed=False)
session.cluster.connection_factory.return_value = conn
session.cluster.get_core_connections_per_host.return_value = 1
# manipulate the core connection setting so that we can
# trash the only connection
pool = HostConnectionPool(host, HostDistance.LOCAL, session)
session.cluster.get_core_connections_per_host.return_value = 0
pool._maybe_trash_connection(conn)
session.cluster.get_core_connections_per_host.return_value = 1
submit_called = Event()
def fire_event(*args, **kwargs):
submit_called.set()
session.submit.side_effect = fire_event
def get_conn():
conn.reset_mock()
c = pool.borrow_connection(1.0)
self.assertIs(conn, c)
self.assertEqual(1, conn.in_flight)
conn.set_keyspace_blocking.assert_called_once_with('foobarkeyspace')
pool.return_connection(c)
t = Thread(target=get_conn)
t.start()
submit_called.wait()
self.assertEqual(1, pool._scheduled_for_creation)
session.submit.assert_called_once_with(pool._create_new_connection)
# now run the create_new_connection call
pool._create_new_connection()
t.join()
self.assertEqual(0, conn.in_flight)示例5: test_successful_wait_for_connection
def test_successful_wait_for_connection(self):
host = Mock(spec=Host, address='ip1')
session = self.make_session()
conn = NonCallableMagicMock(spec=Connection, in_flight=0, is_defunct=False, is_closed=False)
session.cluster.connection_factory.return_value = conn
pool = HostConnectionPool(host, HostDistance.LOCAL, session)
session.cluster.connection_factory.assert_called_once_with(host.address)
pool.borrow_connection(timeout=0.01)
self.assertEqual(1, conn.in_flight)
def get_second_conn():
c = pool.borrow_connection(1.0)
self.assertIs(conn, c)
pool.return_connection(c)
t = Thread(target=get_second_conn)
t.start()
pool.return_connection(conn)
t.join()
self.assertEqual(0, conn.in_flight)示例6: test_spawn_when_at_max
def test_spawn_when_at_max(self):
host = Mock(spec=Host, address='ip1')
session = self.make_session()
conn = NonCallableMagicMock(spec=Connection, in_flight=0, is_defunct=False, is_closed=False)
session.cluster.connection_factory.return_value = conn
# core conns = 1, max conns = 2
session.cluster.get_max_connections_per_host.return_value = 2
pool = HostConnectionPool(host, HostDistance.LOCAL, session)
session.cluster.connection_factory.assert_called_once_with(host.address)
pool.borrow_connection(timeout=0.01)
self.assertEqual(1, conn.in_flight)
# make this conn full
conn.in_flight = MAX_STREAM_PER_CONNECTION
# we don't care about making this borrow_connection call succeed for the
# purposes of this test, as long as it results in a new connection
# creation being scheduled
self.assertRaises(NoConnectionsAvailable, pool.borrow_connection, 0)
session.submit.assert_called_once_with(pool._create_new_connection)