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Doubt on Listeners

muthu kumaran
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I have been going through HFSJ and hav a doubt on what is mentioned regarding listeners

In page 206,
HttpSessionBindinglistener is not mentioned under Attribute Listeners, though it listens for attribute events but it has been included as "OtherLife Cycle listener".

This leads to one more doubt !
Can addition/removal of attribute be considered a Lifecycle event?
If so why are the other attribute listeners not included as "Life cycle Listeners"

Can anyone clarify my doubts

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