what is Set bean name in bean's life

[Samanthi perera]

I am reading Spring in Action book.
it saying that beans has life cycle several steps.
3 rd one is Set bean name =If the bean implements BeanNameAware, Spring passes thebean’s ID to setBeanName().

1)my question is what is BeanNameAware interface?
2)when do we impliment that interface?

[David Newton]

The BeanNameAware interface is the interface that tells Spring it should set the bean name on the bean.

You implement it when you want a bean to be aware of its name.