# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from enum import IntEnum


class TransactionConcurrency(IntEnum):
    """
    Defines different cache transaction concurrency control.
    """

    #: Optimistic concurrency control.
    OPTIMISTIC = 0

    #: Pessimistic concurrency control.
    PESSIMISTIC = 1


class TransactionIsolation(IntEnum):
    """
    Defines different cache transaction isolation levels.
    """

    #: Read committed isolation level.Read committed isolation level.
    READ_COMMITTED = 0

    #: Repeatable read isolation level.
    REPEATABLE_READ = 1

    #: Serializable isolation level.
    SERIALIZABLE = 2