001/*
002 *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
003 *  <p>
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 *  <p>
008 *  http://www.apache.org/licenses/LICENSE-2.0
009 *  <p>
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 */
016package com.mybatisflex.core.datasource;
017
018import java.util.function.Supplier;
019
020public class DataSourceKey {
021
022    private DataSourceKey() {
023    }
024
025    private static final ThreadLocal<String> keyThreadLocal = new ThreadLocal<>();
026
027    public static void use(String dataSourceKey) {
028        keyThreadLocal.set(dataSourceKey);
029    }
030
031    public static <T> T use(String dataSourceKey, Supplier<T> supplier) {
032        try {
033            use(dataSourceKey);
034            return supplier.get();
035        } finally {
036            clear();
037        }
038    }
039
040    public static void use(String dataSourceKey, Runnable runnable) {
041        try {
042            use(dataSourceKey);
043            runnable.run();
044        } finally {
045            clear();
046        }
047    }
048
049    public static void clear() {
050        keyThreadLocal.remove();
051    }
052
053    public static String get() {
054        return keyThreadLocal.get();
055    }
056
057}