本文整理汇总了Python中cassandra.policies.DowngradingConsistencyRetryPolicy.on_read_timeout方法的典型用法代码示例。如果您正苦于以下问题：Python DowngradingConsistencyRetryPolicy.on_read_timeout方法的具体用法？Python DowngradingConsistencyRetryPolicy.on_read_timeout怎么用？Python DowngradingConsistencyRetryPolicy.on_read_timeout使用的例子？那么, 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.policies.DowngradingConsistencyRetryPolicy的用法示例。
在下文中一共展示了DowngradingConsistencyRetryPolicy.on_read_timeout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: test_read_timeout
# 需要导入模块: from cassandra.policies import DowngradingConsistencyRetryPolicy [as 别名]
# 或者: from cassandra.policies.DowngradingConsistencyRetryPolicy import on_read_timeout [as 别名]
def test_read_timeout(self):
policy = DowngradingConsistencyRetryPolicy()
# if this is the second or greater attempt, rethrow
retry, consistency = policy.on_read_timeout(
query=None, consistency=ONE, required_responses=1, received_responses=2,
data_retrieved=True, retry_num=1)
self.assertEqual(retry, RetryPolicy.RETHROW)
self.assertEqual(consistency, None)
# if we didn't get enough responses, retry at a lower consistency
retry, consistency = policy.on_read_timeout(
query=None, consistency=ONE, required_responses=4, received_responses=3,
data_retrieved=True, retry_num=0)
self.assertEqual(retry, RetryPolicy.RETRY)
self.assertEqual(consistency, ConsistencyLevel.THREE)
# if we didn't get enough responses, retry at a lower consistency
retry, consistency = policy.on_read_timeout(
query=None, consistency=ONE, required_responses=3, received_responses=2,
data_retrieved=True, retry_num=0)
self.assertEqual(retry, RetryPolicy.RETRY)
self.assertEqual(consistency, ConsistencyLevel.TWO)
# retry consistency level goes down based on the # of recv'd responses
retry, consistency = policy.on_read_timeout(
query=None, consistency=ONE, required_responses=3, received_responses=1,
data_retrieved=True, retry_num=0)
self.assertEqual(retry, RetryPolicy.RETRY)
self.assertEqual(consistency, ConsistencyLevel.ONE)
# if we got no responses, rethrow
retry, consistency = policy.on_read_timeout(
query=None, consistency=ONE, required_responses=3, received_responses=0,
data_retrieved=True, retry_num=0)
self.assertEqual(retry, RetryPolicy.RETHROW)
self.assertEqual(consistency, None)
# if we got enough response but no data, retry
retry, consistency = policy.on_read_timeout(
query=None, consistency=ONE, required_responses=3, received_responses=3,
data_retrieved=False, retry_num=0)
self.assertEqual(retry, RetryPolicy.RETRY)
self.assertEqual(consistency, ONE)
# if we got enough responses, but also got a data response, rethrow
retry, consistency = policy.on_read_timeout(
query=None, consistency=ONE, required_responses=2, received_responses=2,
data_retrieved=True, retry_num=0)
self.assertEqual(retry, RetryPolicy.RETHROW)
self.assertEqual(consistency, None)