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    private static final ThreadLocal<String> keyThreadLocal = new ThreadLocal<>();
025
026    public static void use(String dataSourceKey) {
027        keyThreadLocal.set(dataSourceKey);
028    }
029
030    public static <T> T use(String dataSourceKey, Supplier<T> supplier) {
031        try {
032            use(dataSourceKey);
033            return supplier.get();
034        } finally {
035            clear();
036        }
037    }
038
039    public static void use(String dataSourceKey, Runnable runnable) {
040        try {
041            use(dataSourceKey);
042            runnable.run();
043        } finally {
044            clear();
045        }
046    }
047
048    public static void clear() {
049        keyThreadLocal.remove();
050    }
051
052    public static String get() {
053        return keyThreadLocal.get();
054    }
055
056}