本文整理汇总了Python中cassandra.cluster.Cluster.get_control_connection_host方法的典型用法代码示例。如果您正苦于以下问题：Python Cluster.get_control_connection_host方法的具体用法？Python Cluster.get_control_connection_host怎么用？Python Cluster.get_control_connection_host使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类cassandra.cluster.Cluster的用法示例。
在下文中一共展示了Cluster.get_control_connection_host方法的1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: ControlConnectionTests
# 需要导入模块: from cassandra.cluster import Cluster [as 别名]
# 或者: from cassandra.cluster.Cluster import get_control_connection_host [as 别名]
class ControlConnectionTests(unittest.TestCase):
def setUp(self):
if PROTOCOL_VERSION < 3:
raise unittest.SkipTest(
"Native protocol 3,0+ is required for UDTs using %r"
% (PROTOCOL_VERSION,))
self.cluster = Cluster(protocol_version=PROTOCOL_VERSION)
def tearDown(self):
try:
self.session.execute("DROP KEYSPACE keyspacetodrop ")
except (ConfigurationException):
# we already removed the keyspace.
pass
self.cluster.shutdown()
def test_drop_keyspace(self):
"""
Test to validate that dropping a keyspace with user defined types doesn't kill the control connection.
Creates a keyspace, and populates with a user defined type. It then records the control_connection's id. It
will then drop the keyspace and get the id of the control_connection again. They should be the same. If they are
not dropping the keyspace likely caused the control connection to be rebuilt.
@since 2.7.0
@jira_ticket PYTHON-358
@expected_result the control connection is not killed
@test_category connection
"""
self.session = self.cluster.connect()
self.session.execute("""
CREATE KEYSPACE keyspacetodrop
WITH replication = { 'class' : 'SimpleStrategy', 'replication_factor': '1' }
""")
self.session.set_keyspace("keyspacetodrop")
self.session.execute("CREATE TYPE user (age int, name text)")
self.session.execute("CREATE TABLE mytable (a int PRIMARY KEY, b frozen<user>)")
cc_id_pre_drop = id(self.cluster.control_connection._connection)
self.session.execute("DROP KEYSPACE keyspacetodrop")
cc_id_post_drop = id(self.cluster.control_connection._connection)
self.assertEqual(cc_id_post_drop, cc_id_pre_drop)
def test_get_control_connection_host(self):
"""
Test to validate Cluster.get_control_connection_host() metadata
@since 3.5.0
@jira_ticket PYTHON-583
@expected_result the control connection metadata should accurately reflect cluster state.
@test_category metadata
"""
host = self.cluster.get_control_connection_host()
self.assertEqual(host, None)
self.session = self.cluster.connect()
cc_host = self.cluster.control_connection._connection.host
host = self.cluster.get_control_connection_host()
self.assertEqual(host.address, cc_host)
self.assertEqual(host.is_up, True)
# reconnect and make sure that the new host is reflected correctly
self.cluster.control_connection._reconnect()
new_host = self.cluster.get_control_connection_host()
self.assertNotEqual(host, new_host)