001/* 002 * Copyright 2002-2018 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.beans.factory; 018 019/** 020 * Interface to be implemented by beans that need to react once all their properties 021 * have been set by a {@link BeanFactory}: e.g. to perform custom initialization, 022 * or merely to check that all mandatory properties have been set. 023 * 024 * <p>An alternative to implementing {@code InitializingBean} is specifying a custom 025 * init method, for example in an XML bean definition. For a list of all bean 026 * lifecycle methods, see the {@link BeanFactory BeanFactory javadocs}. 027 * 028 * @author Rod Johnson 029 * @author Juergen Hoeller 030 * @see DisposableBean 031 * @see org.springframework.beans.factory.config.BeanDefinition#getPropertyValues() 032 * @see org.springframework.beans.factory.support.AbstractBeanDefinition#getInitMethodName() 033 */ 034public interface InitializingBean { 035 036 /** 037 * Invoked by the containing {@code BeanFactory} after it has set all bean properties 038 * and satisfied {@link BeanFactoryAware}, {@code ApplicationContextAware} etc. 039 * <p>This method allows the bean instance to perform validation of its overall 040 * configuration and final initialization when all bean properties have been set. 041 * @throws Exception in the event of misconfiguration (such as failure to set an 042 * essential property) or if initialization fails for any other reason 043 */ 044 void afterPropertiesSet() throws Exception; 045 046}