前往小程序,Get更优阅读体验!
立即前往
首页
学习
活动
专区
工具
TVP
发布
社区首页 >专栏 >ApplicationContextAware接口和Aware接口

ApplicationContextAware接口和Aware接口

作者头像
IT云清
发布2019-01-22 15:32:43
1.4K0
发布2019-01-22 15:32:43
举报
文章被收录于专栏:IT云清

1.1ApplicationContextAware接口作用

1.2ApplicationContextAware接口源码

代码语言:javascript
复制
package org.springframework.context;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.Aware;

/**
 * Interface to be implemented by any object that wishes to be notified
 * of the {@link ApplicationContext} that it runs in.
 *
 * <p>Implementing this interface makes sense for example when an object
 * requires access to a set of collaborating beans. Note that configuration
 * via bean references is preferable to implementing this interface just
 * for bean lookup purposes.
 *
 * <p>This interface can also be implemented if an object needs access to file
 * resources, i.e. wants to call {@code getResource}, wants to publish
 * an application event, or requires access to the MessageSource. However,
 * it is preferable to implement the more specific {@link ResourceLoaderAware},
 * {@link ApplicationEventPublisherAware} or {@link MessageSourceAware} interface
 * in such a specific scenario.
 *
 * <p>Note that file resource dependencies can also be exposed as bean properties
 * of type {@link org.springframework.core.io.Resource}, populated via Strings
 * with automatic type conversion by the bean factory. This removes the need
 * for implementing any callback interface just for the purpose of accessing
 * a specific file resource.
 *
 * <p>{@link org.springframework.context.support.ApplicationObjectSupport} is a
 * convenience base class for application objects, implementing this interface.
 *
 * <p>For a list of all bean lifecycle methods, see the
 * {@link org.springframework.beans.factory.BeanFactory BeanFactory javadocs}.
 *
 * @author Rod Johnson
 * @author Juergen Hoeller
 * @author Chris Beams
 * @see ResourceLoaderAware
 * @see ApplicationEventPublisherAware
 * @see MessageSourceAware
 * @see org.springframework.context.support.ApplicationObjectSupport
 * @see org.springframework.beans.factory.BeanFactoryAware
 */
public interface ApplicationContextAware extends Aware {

	/**
	 * Set the ApplicationContext that this object runs in.
	 * Normally this call will be used to initialize the object.
	 * <p>Invoked after population of normal bean properties but before an init callback such
	 * as {@link org.springframework.beans.factory.InitializingBean#afterPropertiesSet()}
	 * or a custom init-method. Invoked after {@link ResourceLoaderAware#setResourceLoader},
	 * {@link ApplicationEventPublisherAware#setApplicationEventPublisher} and
	 * {@link MessageSourceAware}, if applicable.
	 * @param applicationContext the ApplicationContext object to be used by this object
	 * @throws ApplicationContextException in case of context initialization errors
	 * @throws BeansException if thrown by application context methods
	 * @see org.springframework.beans.factory.BeanInitializationException
	 */
	void setApplicationContext(ApplicationContext applicationContext) throws BeansException;

}

2.1Aware接口作用

2.1Aware接口源码

代码语言:javascript
复制
package org.springframework.beans.factory;

/**
 * Marker superinterface indicating that a bean is eligible to be
 * notified by the Spring container of a particular framework object
 * through a callback-style method. Actual method signature is
 * determined by individual subinterfaces, but should typically
 * consist of just one void-returning method that accepts a single
 * argument.
 *
 * <p>Note that merely implementing {@link Aware} provides no default
 * functionality. Rather, processing must be done explicitly, for example
 * in a {@link org.springframework.beans.factory.config.BeanPostProcessor BeanPostProcessor}.
 * Refer to {@link org.springframework.context.support.ApplicationContextAwareProcessor}
 * and {@link org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory}
 * for examples of processing {@code *Aware} interface callbacks.
 *
 * @author Chris Beams
 * @since 3.1
 */
public interface Aware {

}
本文参与 腾讯云自媒体同步曝光计划,分享自作者个人站点/博客。
原始发表:2018年11月07日,如有侵权请联系 cloudcommunity@tencent.com 删除

本文分享自 作者个人站点/博客 前往查看

如有侵权,请联系 cloudcommunity@tencent.com 删除。

本文参与 腾讯云自媒体同步曝光计划  ,欢迎热爱写作的你一起参与!

评论
登录后参与评论
0 条评论
热度
最新
推荐阅读
目录
  • 1.1ApplicationContextAware接口作用
  • 1.2ApplicationContextAware接口源码
  • 2.1Aware接口作用
  • 2.1Aware接口源码
领券
问题归档专栏文章快讯文章归档关键词归档开发者手册归档开发者手册 Section 归档