[ Spring ] Bean LifeCycle

Bean Life Cycle (Initialization & Destory)

 

We have 3 ways to control th life-cycle of Bean.

1) @PostConstruct and @PreDestory

2) afterPropertiesSet() from interface InitializingBean

     destory() from interface DisposableBean

3) Standard method naming, init() & destory()

 

 

Above are 3 mechanisms, if applying the mechanisms to one bean with different method names,the sequence would be :

 

INFO [com.vincent.spring.main.LifeCycleBean] - LifeCycleBean Constructor
INFO [com.vincent.spring.main.LifeCycleBean] - postConstruct
INFO [com.vincent.spring.main.LifeCycleBean] - AfterPropertiesSet
INFO [com.vincent.spring.main.LifeCycleBean] - init

 

 

if with same names, will only be excuted once.

 

 

In applicationcontext.xml, should add below:

 

 

<bean class="org.springframework.context.annotation.CommonAnnotationBeanPostProcessor" />

 

 

For @PostConstruct & @PreDestory,we need to add the dependency of "javax.annotation" to pom.xml.

 

 

<dependency>
	<groupId>javax.annotation</groupId>
	<artifactId>jsr250-api</artifactId>
	<version>1.0</version>
</dependency>