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.spring.boot;
017
018import com.mybatisflex.core.row.Db;
019import com.mybatisflex.spring.FlexTransactionManager;
020import org.springframework.boot.autoconfigure.AutoConfigureAfter;
021import org.springframework.boot.autoconfigure.AutoConfigureBefore;
022import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
023import org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration;
024import org.springframework.context.annotation.Bean;
025import org.springframework.context.annotation.Configuration;
026import org.springframework.lang.NonNull;
027import org.springframework.transaction.PlatformTransactionManager;
028import org.springframework.transaction.annotation.TransactionManagementConfigurer;
029
030/**
031 * MyBatis-Flex 事务自动配置。
032 *
033 * @author michael
034 */
035@ConditionalOnClass(Db.class)
036@Configuration(proxyBeanMethods = false)
037@AutoConfigureAfter({MybatisFlexAutoConfiguration.class})
038@AutoConfigureBefore({TransactionAutoConfiguration.class})
039public class FlexTransactionAutoConfiguration implements TransactionManagementConfigurer {
040
041    /**
042     * 这里使用 final 修饰属性是因为：<br>
043     * <p>
044     * 1、调用 {@link #annotationDrivenTransactionManager} 方法会返回 TransactionManager 对象<br>
045     * 2、{@code @Bean} 注入又会返回 TransactionManager 对象<br>
046     * <p>
047     * 需要保证两个对象的一致性。
048     */
049    private final FlexTransactionManager flexTransactionManager = new FlexTransactionManager();
050
051    @NonNull
052    @Override
053    @Bean(name = "transactionManager")
054    public PlatformTransactionManager annotationDrivenTransactionManager() {
055        return flexTransactionManager;
056    }
057
058}