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test_metadata.py
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393 lines (306 loc) · 15.6 KB
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try:
import unittest2 as unittest
except ImportError:
import unittest # noqa
from cassandra import AlreadyExists
from cassandra.cluster import Cluster
from cassandra.metadata import KeyspaceMetadata, TableMetadata, Token, MD5Token, TokenMap
from cassandra.policies import SimpleConvictionPolicy
from cassandra.pool import Host
from tests.integration import get_cluster
class SchemaMetadataTest(unittest.TestCase):
ksname = "schemametadatatest"
@property
def cfname(self):
return self._testMethodName.lower()
@classmethod
def setup_class(cls):
cluster = Cluster()
session = cluster.connect()
try:
results = session.execute("SELECT keyspace_name FROM system.schema_keyspaces")
existing_keyspaces = [row[0] for row in results]
if cls.ksname in existing_keyspaces:
session.execute("DROP KEYSPACE %s" % cls.ksname)
session.execute(
"""
CREATE KEYSPACE %s
WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '1'};
""" % cls.ksname)
finally:
cluster.shutdown()
@classmethod
def teardown_class(cls):
cluster = Cluster(['127.0.0.1'])
session = cluster.connect()
try:
session.execute("DROP KEYSPACE %s" % cls.ksname)
finally:
cluster.shutdown()
def setUp(self):
self.cluster = Cluster(['127.0.0.1'])
self.session = self.cluster.connect()
def tearDown(self):
try:
self.session.execute(
"""
DROP TABLE {ksname}.{cfname}
""".format(ksname=self.ksname, cfname=self.cfname))
finally:
self.cluster.shutdown()
def make_create_statement(self, partition_cols, clustering_cols=None, other_cols=None, compact=False):
clustering_cols = clustering_cols or []
other_cols = other_cols or []
statement = "CREATE TABLE %s.%s (" % (self.ksname, self.cfname)
if len(partition_cols) == 1 and not clustering_cols:
statement += "%s text PRIMARY KEY, " % partition_cols[0]
else:
statement += ", ".join("%s text" % col for col in partition_cols)
statement += ", "
statement += ", ".join("%s text" % col for col in clustering_cols + other_cols)
if len(partition_cols) != 1 or clustering_cols:
statement += ", PRIMARY KEY ("
if len(partition_cols) > 1:
statement += "(" + ", ".join(partition_cols) + ")"
else:
statement += partition_cols[0]
if clustering_cols:
statement += ", "
statement += ", ".join(clustering_cols)
statement += ")"
statement += ")"
if compact:
statement += " WITH COMPACT STORAGE"
return statement
def check_create_statement(self, tablemeta, original):
recreate = tablemeta.as_cql_query(formatted=False)
self.assertEquals(original, recreate[:len(original)])
self.session.execute("DROP TABLE %s.%s" % (self.ksname, self.cfname))
self.session.execute(recreate)
# create the table again, but with formatting enabled
self.session.execute("DROP TABLE %s.%s" % (self.ksname, self.cfname))
recreate = tablemeta.as_cql_query(formatted=True)
self.session.execute(recreate)
def get_table_metadata(self):
self.cluster.control_connection.refresh_schema()
return self.cluster.metadata.keyspaces[self.ksname].tables[self.cfname]
def test_basic_table_meta_properties(self):
create_statement = self.make_create_statement(["a"], [], ["b", "c"])
self.session.execute(create_statement)
self.cluster.control_connection.refresh_schema()
meta = self.cluster.metadata
self.assertNotEqual(meta.cluster_ref, None)
self.assertNotEqual(meta.cluster_name, None)
self.assertTrue(self.ksname in meta.keyspaces)
ksmeta = meta.keyspaces[self.ksname]
self.assertEqual(ksmeta.name, self.ksname)
self.assertTrue(ksmeta.durable_writes)
self.assertEqual(ksmeta.replication_strategy.name, 'SimpleStrategy')
self.assertEqual(ksmeta.replication_strategy.replication_factor, 1)
self.assertTrue(self.cfname in ksmeta.tables)
tablemeta = ksmeta.tables[self.cfname]
self.assertEqual(tablemeta.keyspace, ksmeta)
self.assertEqual(tablemeta.name, self.cfname)
self.assertEqual([u'a'], [c.name for c in tablemeta.partition_key])
self.assertEqual([], tablemeta.clustering_key)
self.assertEqual([u'a', u'b', u'c'], sorted(tablemeta.columns.keys()))
for option in TableMetadata.recognized_options:
self.assertTrue(option in tablemeta.options)
self.check_create_statement(tablemeta, create_statement)
def test_compound_primary_keys(self):
create_statement = self.make_create_statement(["a"], ["b"], ["c"])
create_statement += " WITH CLUSTERING ORDER BY (b ASC)"
self.session.execute(create_statement)
tablemeta = self.get_table_metadata()
self.assertEqual([u'a'], [c.name for c in tablemeta.partition_key])
self.assertEqual([u'b'], [c.name for c in tablemeta.clustering_key])
self.assertEqual([u'a', u'b', u'c'], sorted(tablemeta.columns.keys()))
self.check_create_statement(tablemeta, create_statement)
def test_compound_primary_keys_more_columns(self):
create_statement = self.make_create_statement(["a"], ["b", "c"], ["d", "e", "f"])
create_statement += " WITH CLUSTERING ORDER BY (b ASC, c ASC)"
self.session.execute(create_statement)
tablemeta = self.get_table_metadata()
self.assertEqual([u'a'], [c.name for c in tablemeta.partition_key])
self.assertEqual([u'b', u'c'], [c.name for c in tablemeta.clustering_key])
self.assertEqual(
[u'a', u'b', u'c', u'd', u'e', u'f'],
sorted(tablemeta.columns.keys()))
self.check_create_statement(tablemeta, create_statement)
def test_composite_primary_key(self):
create_statement = self.make_create_statement(["a", "b"], [], ["c"])
self.session.execute(create_statement)
tablemeta = self.get_table_metadata()
self.assertEqual([u'a', u'b'], [c.name for c in tablemeta.partition_key])
self.assertEqual([], tablemeta.clustering_key)
self.assertEqual([u'a', u'b', u'c'], sorted(tablemeta.columns.keys()))
self.check_create_statement(tablemeta, create_statement)
def test_composite_in_compound_primary_key(self):
create_statement = self.make_create_statement(["a", "b"], ["c"], ["d", "e"])
create_statement += " WITH CLUSTERING ORDER BY (c ASC)"
self.session.execute(create_statement)
tablemeta = self.get_table_metadata()
self.assertEqual([u'a', u'b'], [c.name for c in tablemeta.partition_key])
self.assertEqual([u'c'], [c.name for c in tablemeta.clustering_key])
self.assertEqual([u'a', u'b', u'c', u'd', u'e'], sorted(tablemeta.columns.keys()))
self.check_create_statement(tablemeta, create_statement)
def test_compound_primary_keys_compact(self):
create_statement = self.make_create_statement(["a"], ["b"], ["c"], compact=True)
create_statement += " AND CLUSTERING ORDER BY (b ASC)"
self.session.execute(create_statement)
tablemeta = self.get_table_metadata()
self.assertEqual([u'a'], [c.name for c in tablemeta.partition_key])
self.assertEqual([u'b'], [c.name for c in tablemeta.clustering_key])
self.assertEqual([u'a', u'b', u'c'], sorted(tablemeta.columns.keys()))
self.check_create_statement(tablemeta, create_statement)
def test_compound_primary_keys_more_columns_compact(self):
create_statement = self.make_create_statement(["a"], ["b", "c"], ["d"], compact=True)
create_statement += " AND CLUSTERING ORDER BY (b ASC, c ASC)"
self.session.execute(create_statement)
tablemeta = self.get_table_metadata()
self.assertEqual([u'a'], [c.name for c in tablemeta.partition_key])
self.assertEqual([u'b', u'c'], [c.name for c in tablemeta.clustering_key])
self.assertEqual([u'a', u'b', u'c', u'd'], sorted(tablemeta.columns.keys()))
self.check_create_statement(tablemeta, create_statement)
def test_composite_primary_key_compact(self):
create_statement = self.make_create_statement(["a", "b"], [], ["c"], compact=True)
self.session.execute(create_statement)
tablemeta = self.get_table_metadata()
self.assertEqual([u'a', u'b'], [c.name for c in tablemeta.partition_key])
self.assertEqual([], tablemeta.clustering_key)
self.assertEqual([u'a', u'b', u'c'], sorted(tablemeta.columns.keys()))
self.check_create_statement(tablemeta, create_statement)
def test_composite_in_compound_primary_key_compact(self):
create_statement = self.make_create_statement(["a", "b"], ["c"], ["d"], compact=True)
create_statement += " AND CLUSTERING ORDER BY (c ASC)"
self.session.execute(create_statement)
tablemeta = self.get_table_metadata()
self.assertEqual([u'a', u'b'], [c.name for c in tablemeta.partition_key])
self.assertEqual([u'c'], [c.name for c in tablemeta.clustering_key])
self.assertEqual([u'a', u'b', u'c', u'd'], sorted(tablemeta.columns.keys()))
self.check_create_statement(tablemeta, create_statement)
def test_compound_primary_keys_ordering(self):
create_statement = self.make_create_statement(["a"], ["b"], ["c"])
create_statement += " WITH CLUSTERING ORDER BY (b DESC)"
self.session.execute(create_statement)
tablemeta = self.get_table_metadata()
self.check_create_statement(tablemeta, create_statement)
def test_compound_primary_keys_more_columns_ordering(self):
create_statement = self.make_create_statement(["a"], ["b", "c"], ["d", "e", "f"])
create_statement += " WITH CLUSTERING ORDER BY (b DESC, c ASC)"
self.session.execute(create_statement)
tablemeta = self.get_table_metadata()
self.check_create_statement(tablemeta, create_statement)
def test_composite_in_compound_primary_key_ordering(self):
create_statement = self.make_create_statement(["a", "b"], ["c"], ["d", "e"])
create_statement += " WITH CLUSTERING ORDER BY (c DESC)"
self.session.execute(create_statement)
tablemeta = self.get_table_metadata()
self.check_create_statement(tablemeta, create_statement)
def test_indexes(self):
create_statement = self.make_create_statement(["a"], ["b", "c"], ["d", "e", "f"])
create_statement += " WITH CLUSTERING ORDER BY (b ASC, c ASC)"
self.session.execute(create_statement)
d_index = "CREATE INDEX d_index ON %s.%s (d)" % (self.ksname, self.cfname)
e_index = "CREATE INDEX e_index ON %s.%s (e)" % (self.ksname, self.cfname)
self.session.execute(d_index)
self.session.execute(e_index)
tablemeta = self.get_table_metadata()
statements = tablemeta.export_as_string().strip()
statements = [s.strip() for s in statements.split(';')]
statements = filter(bool, statements)
self.assertEqual(3, len(statements))
self.assertEqual(d_index, statements[1])
self.assertEqual(e_index, statements[2])
class TestCodeCoverage(unittest.TestCase):
def test_export_schema(self):
"""
Test export schema functionality
"""
cluster = Cluster()
cluster.connect()
self.assertIsInstance(cluster.metadata.export_schema_as_string(), unicode)
def test_export_keyspace_schema(self):
"""
Test export keyspace schema functionality
"""
cluster = Cluster()
cluster.connect()
for keyspace in cluster.metadata.keyspaces:
keyspace_metadata = cluster.metadata.keyspaces[keyspace]
self.assertIsInstance(keyspace_metadata.export_as_string(), unicode)
self.assertIsInstance(keyspace_metadata.as_cql_query(), unicode)
def test_already_exists_exceptions(self):
"""
Ensure AlreadyExists exception is thrown when hit
"""
cluster = Cluster()
session = cluster.connect()
ksname = 'test3rf'
cfname = 'test'
ddl = '''
CREATE KEYSPACE %s
WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '3'}'''
self.assertRaises(AlreadyExists, session.execute, ddl % ksname)
ddl = '''
CREATE TABLE %s.%s (
k int PRIMARY KEY,
v int )'''
self.assertRaises(AlreadyExists, session.execute, ddl % (ksname, cfname))
def test_replicas(self):
"""
Ensure cluster.metadata.get_replicas return correctly when not attached to keyspace
"""
cluster = Cluster()
self.assertEqual(cluster.metadata.get_replicas('test3rf', 'key'), [])
cluster.connect('test3rf')
self.assertNotEqual(list(cluster.metadata.get_replicas('test3rf', 'key')), [])
host = list(cluster.metadata.get_replicas('test3rf', 'key'))[0]
self.assertEqual(host.datacenter, 'datacenter1')
self.assertEqual(host.rack, 'rack1')
def test_token_map(self):
"""
Test token mappings
"""
cluster = Cluster()
cluster.connect('test3rf')
ring = cluster.metadata.token_map.ring
owners = list(cluster.metadata.token_map.token_to_host_owner[token] for token in ring)
get_replicas = cluster.metadata.token_map.get_replicas
for ksname in ('test1rf', 'test2rf', 'test3rf'):
self.assertNotEqual(list(get_replicas('test3rf', ring[0])), [])
for i, token in enumerate(ring):
self.assertEqual(get_replicas('test3rf', token), set(owners))
self.assertEqual(get_replicas('test2rf', token), set([owners[i], owners[(i + 1) % 3]]))
self.assertEqual(get_replicas('test1rf', token), set([owners[i]]))
class TokenMetadataTest(unittest.TestCase):
"""
Test of TokenMap creation and other behavior.
"""
def test_token(self):
expected_node_count = len(get_cluster().nodes)
cluster = Cluster()
cluster.connect()
tmap = cluster.metadata.token_map
self.assertTrue(issubclass(tmap.token_class, Token))
self.assertEqual(expected_node_count, len(tmap.ring))
cluster.shutdown()
def test_getting_replicas(self):
tokens = [MD5Token(str(i)) for i in range(0, (2 ** 127 - 1), 2 ** 125)]
hosts = [Host("ip%d" % i, SimpleConvictionPolicy) for i in range(len(tokens))]
token_to_primary_replica = dict(zip(tokens, hosts))
keyspace = KeyspaceMetadata("ks", True, "SimpleStrategy", {"replication_factor": "1"})
token_map = TokenMap(MD5Token, token_to_primary_replica, tokens, [keyspace])
# tokens match node tokens exactly
for token, expected_host in zip(tokens, hosts):
replicas = token_map.get_replicas("ks", token)
self.assertEqual(replicas, set([expected_host]))
# shift the tokens back by one
for token, expected_host in zip(tokens[1:], hosts[1:]):
replicas = token_map.get_replicas("ks", MD5Token(str(token.value - 1)))
self.assertEqual(replicas, set([expected_host]))
# shift the tokens forward by one
for i, token in enumerate(tokens):
replicas = token_map.get_replicas("ks", MD5Token(str(token.value + 1)))
expected_host = hosts[(i + 1) % len(hosts)]
self.assertEqual(replicas, set([expected_host]))