/* * Copyright 2002-2018 the original author or authors. * * Licensed 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 * * https://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. */ package org.springframework.transaction.annotation; import org.springframework.context.annotation.AdviceMode; import org.springframework.context.annotation.AdviceModeImportSelector; import org.springframework.context.annotation.AutoProxyRegistrar; import org.springframework.transaction.config.TransactionManagementConfigUtils; import org.springframework.util.ClassUtils; /** * Selects which implementation of {@link AbstractTransactionManagementConfiguration} * should be used based on the value of {@link EnableTransactionManagement#mode} on the * importing {@code @Configuration} class. * * @author Chris Beams * @author Juergen Hoeller * @since 3.1 * @see EnableTransactionManagement * @see ProxyTransactionManagementConfiguration * @see TransactionManagementConfigUtils#TRANSACTION_ASPECT_CONFIGURATION_CLASS_NAME * @see TransactionManagementConfigUtils#JTA_TRANSACTION_ASPECT_CONFIGURATION_CLASS_NAME */ public class TransactionManagementConfigurationSelector extends AdviceModeImportSelector<EnableTransactionManagement> { /** * Returns {@link ProxyTransactionManagementConfiguration} or * {@code AspectJ(Jta)TransactionManagementConfiguration} for {@code PROXY} * and {@code ASPECTJ} values of {@link EnableTransactionManagement#mode()}, * respectively. */ @Override protected String[] selectImports(AdviceMode adviceMode) { switch (adviceMode) { case PROXY: return new String[] {AutoProxyRegistrar.class.getName(), ProxyTransactionManagementConfiguration.class.getName()}; case ASPECTJ: return new String[] {determineTransactionAspectClass()}; default: return null; } } private String determineTransactionAspectClass() { return (ClassUtils.isPresent("javax.transaction.Transactional", getClass().getClassLoader()) ? TransactionManagementConfigUtils.JTA_TRANSACTION_ASPECT_CONFIGURATION_CLASS_NAME : TransactionManagementConfigUtils.TRANSACTION_ASPECT_CONFIGURATION_CLASS_NAME); } }