1 /* 2 * Copyright 2002-2005 the original author or authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package org.springframework.beans.factory; 18 19 /** 20 * Interface to be implemented by beans that need to react once all their 21 * properties have been set by a BeanFactory: for example, to perform custom 22 * initialization, or merely to check that all mandatory properties have been set. 23 * 24 * <p>An alternative to implementing InitializingBean is specifying a custom 25 * init-method, for example in an XML bean definition. 26 * For a list of all bean lifecycle methods, see the BeanFactory javadocs. 27 * 28 * @author Rod Johnson 29 * @see BeanNameAware 30 * @see BeanFactoryAware 31 * @see BeanFactory 32 * @see org.springframework.beans.factory.support.RootBeanDefinition#getInitMethodName 33 * @see org.springframework.context.ApplicationContextAware 34 */ 35 public interface InitializingBean { 36 37 /** 38 * Invoked by a BeanFactory after it has set all bean properties supplied 39 * (and satisfied BeanFactoryAware and ApplicationContextAware). 40 * <p>This method allows the bean instance to perform initialization only 41 * possible when all bean properties have been set and to throw an 42 * exception in the event of misconfiguration. 43 * @throws Exception in the event of misconfiguration (such 44 * as failure to set an essential property) or if initialization fails. 45 */ afterPropertiesSet()46 void afterPropertiesSet() throws Exception; 47 48 } 49