def _list(sharding_type):
"""The method returns all the shard mappings (names) of a
particular sharding_type. For example if the method is called
with 'range' it returns all the sharding specifications that exist
of type range.
:param sharding_type: The sharding type for which the sharding
specification needs to be returned.
:return: A list of dictionaries of shard mappings that are of
the sharding type
An empty list of the sharding type is valid but no
shard mapping definition is found
An error if the sharding type is invalid.
:raises: Sharding Error if Sharding type is not found.
"""
if sharding_type not in Shards.VALID_SHARDING_TYPES:
raise _errors.ShardingError(INVALID_SHARDING_TYPE % (sharding_type,))
ret_shard_mappings = []
shard_mappings = ShardMapping.list(sharding_type)
for shard_mapping in shard_mappings:
ret_shard_mappings.append({
"mapping_id":shard_mapping.shard_mapping_id,
"table_name":shard_mapping.table_name,
"column_name":shard_mapping.column_name,
"type_name":shard_mapping.type_name,
"global_group":shard_mapping.global_group})
return ret_shard_mappings
def _list(sharding_type):
"""The method returns all the shard mappings (names) of a
particular sharding_type. For example if the method is called
with 'range' it returns all the sharding specifications that exist
of type range.
:param sharding_type: The sharding type for which the sharding
specification needs to be returned.
:return: A list of dictionaries of shard mappings that are of
the sharding type
An empty list of the sharding type is valid but no
shard mapping definition is found
An error if the sharding type is invalid.
:raises: Sharding Error if Sharding type is not found.
"""
if sharding_type not in Shards.VALID_SHARDING_TYPES:
raise _errors.ShardingError(INVALID_SHARDING_TYPE % (sharding_type, ))
ret_shard_mappings = []
shard_mappings = ShardMapping.list(sharding_type)
for shard_mapping in shard_mappings:
ret_shard_mappings.append({
"mapping_id": shard_mapping.shard_mapping_id,
"table_name": shard_mapping.table_name,
"column_name": shard_mapping.column_name,
"type_name": shard_mapping.type_name,
"global_group": shard_mapping.global_group
})
return ret_shard_mappings
def test_shard_mapping_list_mappings(self):
"""Test the listing of all HASH shards in a shard mapping.
"""
shard_mappings = ShardMapping.list("HASH")
self.assertTrue(
ShardingUtils.compare_shard_mapping(self.__shard_mapping_1,
shard_mappings[0]))
def test_shard_mapping_list_mappings(self):
shard_mappings = ShardMapping.list("RANGE")
self.assertTrue(ShardingUtils.compare_shard_mapping
(self.__shard_mapping_1, shard_mappings[0]))
self.assertTrue(ShardingUtils.compare_shard_mapping
(self.__shard_mapping_2, shard_mappings[1]))
self.assertTrue(ShardingUtils.compare_shard_mapping
(self.__shard_mapping_3, shard_mappings[2]))
self.assertTrue(ShardingUtils.compare_shard_mapping
(self.__shard_mapping_4, shard_mappings[3]))
def test_shard_mapping_list_mappings(self):
shard_mappings = ShardMapping.list("RANGE")
self.assertTrue(
ShardingUtils.compare_shard_mapping(self.__shard_mapping_1,
shard_mappings[0]))
self.assertTrue(
ShardingUtils.compare_shard_mapping(self.__shard_mapping_2,
shard_mappings[1]))
self.assertTrue(
ShardingUtils.compare_shard_mapping(self.__shard_mapping_3,
shard_mappings[2]))
self.assertTrue(
ShardingUtils.compare_shard_mapping(self.__shard_mapping_4,
shard_mappings[3]))
def test_shard_mapping_list_mappings(self):
"""Test the listing of all HASH shards in a shard mapping.
"""
shard_mappings = ShardMapping.list("HASH")
self.assertTrue(ShardingUtils.compare_shard_mapping
(self.__shard_mapping_1, shard_mappings[0]))
