Spring-5 05/15/2008
 

What are the important beans lifecycle methods?

There are two important bean lifecycle methods. The first one is setup which is called when the bean is loaded in to the container. The second method is the teardown method which is called when the bean is unloaded from the container.

 

How can you override beans default lifecycle methods?

The bean tag has two more important attributes with which you can define your own custom initialization and destroy methods. Here I have shown a small demonstration. Two new methods fooSetup and fooTeardown are to be added to your Foo class.

<beans>

      <bean id="bar" class="com.act.Foo" init-method=”fooSetup” destroy=”fooTeardown”/>

</beans>

What are Inner Beans?

When wiring beans, if a bean element is embedded to a property tag directly, then that bean is said to the Inner Bean. The drawback of this bean is that it cannot be reused anywhere else.

 

What are the different types of bean injections?

There are two types of bean injections.

By setter
By constructor
 
What is Auto wiring?

You can wire the beans as you wish. But spring framework also does this work for you. It can auto wire the related beans together. All you have to do is just set the autowire attribute of bean tag to an autowire type.

<beans>

        <bean id="bar" class="com.act.Foo" Autowire=”autowire type”/>

</beans>

 


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