001/*
002 * Copyright 2015-2022 Transmogrify LLC, 2022-2023 Revetware LLC.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.pyranid;
018
019import javax.annotation.Nonnull;
020import javax.annotation.Nullable;
021import java.sql.Connection;
022import java.util.Optional;
023
024/**
025 * Strategies for database locking during transactional operations.
026 *
027 * @author <a href="https://www.revetkn.com">Mark Allen</a>
028 * @since 1.0.0
029 */
030public enum TransactionIsolation {
031        /**
032         * Default isolation (DBMS-specific).
033         */
034        DEFAULT(null),
035
036        /**
037         * Maps to JDBC value {@link Connection#TRANSACTION_READ_COMMITTED}.
038         */
039        READ_COMMITTED(Connection.TRANSACTION_READ_COMMITTED),
040
041        /**
042         * Maps to JDBC value {@link Connection#TRANSACTION_READ_UNCOMMITTED}.
043         */
044        READ_UNCOMMITTED(Connection.TRANSACTION_READ_UNCOMMITTED),
045
046        /**
047         * Maps to JDBC value {@link Connection#TRANSACTION_REPEATABLE_READ}.
048         */
049        REPEATABLE_READ(Connection.TRANSACTION_REPEATABLE_READ),
050
051        /**
052         * Maps to JDBC value {@link Connection#TRANSACTION_SERIALIZABLE}.
053         */
054        SERIALIZABLE(Connection.TRANSACTION_SERIALIZABLE);
055
056        @Nullable
057        private final Integer jdbcLevel;
058
059        TransactionIsolation(@Nullable Integer jdbcLevel) {
060                this.jdbcLevel = jdbcLevel;
061        }
062
063        @Nonnull
064        Optional<Integer> getJdbcLevel() {
065                return Optional.ofNullable(this.jdbcLevel);
066        }
067}