001/* 002 * Copyright 2002-2012 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.w3c.dom.Element; 020 021import org.springframework.beans.factory.xml.NamespaceHandlerSupport; 022 023/** 024 * {@code NamespaceHandler} allowing for the configuration of 025 * declarative transaction management using either XML or using annotations. 026 * 027 * <p>This namespace handler is the central piece of functionality in the 028 * Spring transaction management facilities and offers two approaches 029 * to declaratively manage transactions. 030 * 031 * <p>One approach uses transaction semantics defined in XML using the 032 * {@code <tx:advice>} elements, the other uses annotations 033 * in combination with the {@code <tx:annotation-driven>} element. 034 * Both approached are detailed to great extent in the Spring reference manual. 035 * 036 * @author Rob Harrop 037 * @author Juergen Hoeller 038 * @since 2.0 039 */ 040public class TxNamespaceHandler extends NamespaceHandlerSupport { 041 042 static final String TRANSACTION_MANAGER_ATTRIBUTE = "transaction-manager"; 043 044 static final String DEFAULT_TRANSACTION_MANAGER_BEAN_NAME = "transactionManager"; 045 046 047 static String getTransactionManagerName(Element element) { 048 return (element.hasAttribute(TRANSACTION_MANAGER_ATTRIBUTE) ? 049 element.getAttribute(TRANSACTION_MANAGER_ATTRIBUTE) : DEFAULT_TRANSACTION_MANAGER_BEAN_NAME); 050 } 051 052 053 @Override 054 public void init() { 055 registerBeanDefinitionParser("advice", new TxAdviceBeanDefinitionParser()); 056 registerBeanDefinitionParser("annotation-driven", new AnnotationDrivenBeanDefinitionParser()); 057 registerBeanDefinitionParser("jta-transaction-manager", new JtaTransactionManagerBeanDefinitionParser()); 058 } 059 060}