Python ControlConnection.wait_for_schema_agreement方法代码示例

# 需要导入模块: from cassandra.cluster import ControlConnection [as 别名]
# 或者: from cassandra.cluster.ControlConnection import wait_for_schema_agreement [as 别名]
class ControlConnectionTest(unittest.TestCase):

    def setUp(self):
        self.cluster = MockCluster()
        self.connection = MockConnection()
        self.time = FakeTime()

        self.control_connection = ControlConnection(self.cluster, timeout=0.01)
        self.control_connection._connection = self.connection
        self.control_connection._time = self.time

    def test_wait_for_schema_agreement(self):
        """
        Basic test with all schema versions agreeing
        """
        self.assertTrue(self.control_connection.wait_for_schema_agreement())
        # the control connection should not have slept at all
        self.assertEqual(self.time.clock, 0)

    def test_wait_for_schema_agreement_fails(self):
        """
        Make sure the control connection sleeps and retries
        """
        # change the schema version on one node
        self.connection.peer_results[1][1][2] = 'b'
        self.assertFalse(self.control_connection.wait_for_schema_agreement())
        # the control connection should have slept until it hit the limit
        self.assertGreaterEqual(self.time.clock, Cluster.max_schema_agreement_wait)

    def test_wait_for_schema_agreement_skipping(self):
        """
        If rpc_address or schema_version isn't set, the host should be skipped
        """
        # an entry with no schema_version
        self.connection.peer_results[1].append(
            ["192.168.1.3", "10.0.0.3", None, "dc1", "rack1", ["3", "103", "203"]]
        )
        # an entry with a different schema_version and no rpc_address
        self.connection.peer_results[1].append(
            [None, None, "b", "dc1", "rack1", ["4", "104", "204"]]
        )

        # change the schema version on one of the existing entries
        self.connection.peer_results[1][1][3] = 'c'
        self.cluster.metadata.get_host('192.168.1.1').is_up = False

        self.assertTrue(self.control_connection.wait_for_schema_agreement())
        self.assertEqual(self.time.clock, 0)

    def test_wait_for_schema_agreement_rpc_lookup(self):
        """
        If the rpc_address is 0.0.0.0, the "peer" column should be used instead.
        """
        self.connection.peer_results[1].append(
            ["0.0.0.0", PEER_IP, "b", "dc1", "rack1", ["3", "103", "203"]]
        )
        host = Host("0.0.0.0", SimpleConvictionPolicy)
        self.cluster.metadata.hosts[PEER_IP] = host
        host.is_up = False

        # even though the new host has a different schema version, it's
        # marked as down, so the control connection shouldn't care
        self.assertTrue(self.control_connection.wait_for_schema_agreement())
        self.assertEqual(self.time.clock, 0)

        # but once we mark it up, the control connection will care
        host.is_up = True
        self.assertFalse(self.control_connection.wait_for_schema_agreement())
        self.assertGreaterEqual(self.time.clock, Cluster.max_schema_agreement_wait)

    def test_refresh_nodes_and_tokens(self):
        self.control_connection.refresh_node_list_and_token_map()
        meta = self.cluster.metadata
        self.assertEqual(meta.partitioner, 'Murmur3Partitioner')
        self.assertEqual(meta.cluster_name, 'foocluster')

        # check token map
        self.assertEqual(sorted(meta.all_hosts()), sorted(meta.token_map.keys()))
        for token_list in meta.token_map.values():
            self.assertEqual(3, len(token_list))

        # check datacenter/rack
        for host in meta.all_hosts():
            self.assertEqual(host.datacenter, "dc1")
            self.assertEqual(host.rack, "rack1")

    def test_refresh_nodes_and_tokens_no_partitioner(self):
        """
        Test handling of an unknown partitioner.
        """
        # set the partitioner column to None
        self.connection.local_results[1][0][4] = None
        self.control_connection.refresh_node_list_and_token_map()
        meta = self.cluster.metadata
        self.assertEqual(meta.partitioner, None)
        self.assertEqual(meta.token_map, {})

    def test_refresh_nodes_and_tokens_add_host(self):
        self.connection.peer_results[1].append(
            ["192.168.1.3", "10.0.0.3", "a", "dc1", "rack1", ["3", "103", "203"]]
#.........这里部分代码省略.........

# 需要导入模块: from cassandra.cluster import ControlConnection [as 别名]
# 或者: from cassandra.cluster.ControlConnection import wait_for_schema_agreement [as 别名]
class ControlConnectionTest(unittest.TestCase):

    def setUp(self):
        self.cluster = MockCluster()
        self.connection = MockConnection()
        self.time = FakeTime()

        self.control_connection = ControlConnection(self.cluster, 1, 0, 0, 0)
        self.control_connection._connection = self.connection
        self.control_connection._time = self.time

    def _get_matching_schema_preloaded_results(self):
        local_results = [
            ["schema_version", "cluster_name", "data_center", "rack", "partitioner", "release_version", "tokens"],
            [["a", "foocluster", "dc1", "rack1", "Murmur3Partitioner", "2.2.0", ["0", "100", "200"]]]
        ]
        local_response = ResultMessage(kind=RESULT_KIND_ROWS, results=local_results)

        peer_results = [
            ["rpc_address", "peer", "schema_version", "data_center", "rack", "tokens"],
            [["192.168.1.1", "10.0.0.1", "a", "dc1", "rack1", ["1", "101", "201"]],
             ["192.168.1.2", "10.0.0.2", "a", "dc1", "rack1", ["2", "102", "202"]]]
        ]
        peer_response = ResultMessage(kind=RESULT_KIND_ROWS, results=peer_results)

        return (peer_response, local_response)

    def _get_nonmatching_schema_preloaded_results(self):
        local_results = [
            ["schema_version", "cluster_name", "data_center", "rack", "partitioner", "release_version", "tokens"],
            [["a", "foocluster", "dc1", "rack1", "Murmur3Partitioner", "2.2.0", ["0", "100", "200"]]]
        ]
        local_response = ResultMessage(kind=RESULT_KIND_ROWS, results=local_results)

        peer_results = [
            ["rpc_address", "peer", "schema_version", "data_center", "rack", "tokens"],
            [["192.168.1.1", "10.0.0.1", "a", "dc1", "rack1", ["1", "101", "201"]],
             ["192.168.1.2", "10.0.0.2", "b", "dc1", "rack1", ["2", "102", "202"]]]
        ]
        peer_response = ResultMessage(kind=RESULT_KIND_ROWS, results=peer_results)

        return (peer_response, local_response)

    def test_wait_for_schema_agreement(self):
        """
        Basic test with all schema versions agreeing
        """
        self.assertTrue(self.control_connection.wait_for_schema_agreement())
        # the control connection should not have slept at all
        self.assertEqual(self.time.clock, 0)

    def test_wait_for_schema_agreement_uses_preloaded_results_if_given(self):
        """
        wait_for_schema_agreement uses preloaded results if given for shared table queries
        """
        preloaded_results = self._get_matching_schema_preloaded_results()

        self.assertTrue(self.control_connection.wait_for_schema_agreement(preloaded_results=preloaded_results))
        # the control connection should not have slept at all
        self.assertEqual(self.time.clock, 0)
        # the connection should not have made any queries if given preloaded results
        self.assertEqual(self.connection.wait_for_responses.call_count, 0)

    def test_wait_for_schema_agreement_falls_back_to_querying_if_schemas_dont_match_preloaded_result(self):
        """
        wait_for_schema_agreement requery if schema does not match using preloaded results
        """
        preloaded_results = self._get_nonmatching_schema_preloaded_results()

        self.assertTrue(self.control_connection.wait_for_schema_agreement(preloaded_results=preloaded_results))
        # the control connection should not have slept at all
        self.assertEqual(self.time.clock, 0)
        self.assertEqual(self.connection.wait_for_responses.call_count, 1)

    def test_wait_for_schema_agreement_fails(self):
        """
        Make sure the control connection sleeps and retries
        """
        # change the schema version on one node
        self.connection.peer_results[1][1][2] = 'b'
        self.assertFalse(self.control_connection.wait_for_schema_agreement())
        # the control connection should have slept until it hit the limit
        self.assertGreaterEqual(self.time.clock, self.cluster.max_schema_agreement_wait)

    def test_wait_for_schema_agreement_skipping(self):
        """
        If rpc_address or schema_version isn't set, the host should be skipped
        """
        # an entry with no schema_version
        self.connection.peer_results[1].append(
            ["192.168.1.3", "10.0.0.3", None, "dc1", "rack1", ["3", "103", "203"]]
        )
        # an entry with a different schema_version and no rpc_address
        self.connection.peer_results[1].append(
            [None, None, "b", "dc1", "rack1", ["4", "104", "204"]]
        )

        # change the schema version on one of the existing entries
        self.connection.peer_results[1][1][3] = 'c'
        self.cluster.metadata.get_host('192.168.1.1').is_up = False
#.........这里部分代码省略.........