001/*
002 * Copyright 2002-2014 the original author or authors.
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 *      https://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 org.springframework.transaction.config;
018
019import org.springframework.beans.BeanUtils;
020import org.springframework.beans.factory.FactoryBean;
021import org.springframework.transaction.jta.JtaTransactionManager;
022import org.springframework.util.ClassUtils;
023
024/**
025 * A {@link FactoryBean} equivalent to the <tx:jta-transaction-manager/> XML element,
026 * autodetecting WebLogic and WebSphere servers and exposing the corresponding
027 * {@link org.springframework.transaction.jta.JtaTransactionManager} subclass.
028 *
029 * @author Juergen Hoeller
030 * @since 4.1.1
031 * @see org.springframework.transaction.jta.WebLogicJtaTransactionManager
032 * @see org.springframework.transaction.jta.WebSphereUowTransactionManager
033 */
034public class JtaTransactionManagerFactoryBean implements FactoryBean<JtaTransactionManager> {
035
036        private static final String WEBLOGIC_JTA_TRANSACTION_MANAGER_CLASS_NAME =
037                        "org.springframework.transaction.jta.WebLogicJtaTransactionManager";
038
039        private static final String WEBSPHERE_TRANSACTION_MANAGER_CLASS_NAME =
040                        "org.springframework.transaction.jta.WebSphereUowTransactionManager";
041
042        private static final String JTA_TRANSACTION_MANAGER_CLASS_NAME =
043                        "org.springframework.transaction.jta.JtaTransactionManager";
044
045
046        private static final boolean weblogicPresent = ClassUtils.isPresent(
047                        "weblogic.transaction.UserTransaction", JtaTransactionManagerFactoryBean.class.getClassLoader());
048
049        private static final boolean webspherePresent = ClassUtils.isPresent(
050                        "com.ibm.wsspi.uow.UOWManager", JtaTransactionManagerFactoryBean.class.getClassLoader());
051
052
053        private final JtaTransactionManager transactionManager;
054
055
056        @SuppressWarnings("unchecked")
057        public JtaTransactionManagerFactoryBean() {
058                String className = resolveJtaTransactionManagerClassName();
059                try {
060                        Class<? extends JtaTransactionManager> clazz = (Class<? extends JtaTransactionManager>)
061                                        ClassUtils.forName(className, JtaTransactionManagerFactoryBean.class.getClassLoader());
062                        this.transactionManager = BeanUtils.instantiate(clazz);
063                }
064                catch (ClassNotFoundException ex) {
065                        throw new IllegalStateException("Failed to load JtaTransactionManager class: " + className, ex);
066                }
067        }
068
069
070        @Override
071        public JtaTransactionManager getObject() {
072                return this.transactionManager;
073        }
074
075        @Override
076        public Class<?> getObjectType() {
077                return (this.transactionManager != null ? this.transactionManager.getClass() : JtaTransactionManager.class);
078        }
079
080        @Override
081        public boolean isSingleton() {
082                return true;
083        }
084
085
086        static String resolveJtaTransactionManagerClassName() {
087                if (weblogicPresent) {
088                        return WEBLOGIC_JTA_TRANSACTION_MANAGER_CLASS_NAME;
089                }
090                else if (webspherePresent) {
091                        return WEBSPHERE_TRANSACTION_MANAGER_CLASS_NAME;
092                }
093                else {
094                        return JTA_TRANSACTION_MANAGER_CLASS_NAME;
095                }
096        }
097
098}