spring DestructionAwareBeanPostProcessor 源码
spring DestructionAwareBeanPostProcessor 代码
文件路径：/spring-beans/src/main/java/org/springframework/beans/factory/config/DestructionAwareBeanPostProcessor.java
/*
* Copyright 2002-2018 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.beans.factory.config;
import org.springframework.beans.BeansException;
/**
* Subinterface of {@link BeanPostProcessor} that adds a before-destruction callback.
*
* <p>The typical usage will be to invoke custom destruction callbacks on
* specific bean types, matching corresponding initialization callbacks.
*
* @author Juergen Hoeller
* @since 1.0.1
*/
public interface DestructionAwareBeanPostProcessor extends BeanPostProcessor {
/**
* Apply this BeanPostProcessor to the given bean instance before its
* destruction, e.g. invoking custom destruction callbacks.
* <p>Like DisposableBean's {@code destroy} and a custom destroy method, this
* callback will only apply to beans which the container fully manages the
* lifecycle for. This is usually the case for singletons and scoped beans.
* @param bean the bean instance to be destroyed
* @param beanName the name of the bean
* @throws org.springframework.beans.BeansException in case of errors
* @see org.springframework.beans.factory.DisposableBean#destroy()
* @see org.springframework.beans.factory.support.AbstractBeanDefinition#setDestroyMethodName(String)
*/
void postProcessBeforeDestruction(Object bean, String beanName) throws BeansException;
/**
* Determine whether the given bean instance requires destruction by this
* post-processor.
* <p>The default implementation returns {@code true}. If a pre-5 implementation
* of {@code DestructionAwareBeanPostProcessor} does not provide a concrete
* implementation of this method, Spring silently assumes {@code true} as well.
* @param bean the bean instance to check
* @return {@code true} if {@link #postProcessBeforeDestruction} is supposed to
* be called for this bean instance eventually, or {@code false} if not needed
* @since 4.3
*/
default boolean requiresDestruction(Object bean) {
return true;
}
}
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