ejbactivate() and ejbpassivate()

[patnim17]

HI,
I was learning Entity Beans in EJB and wanted to know what ejbactivate() and ejbpassivate() methods are used for? I know that there are called by the container when the bean is being assosiated or disassociated with the remote reference..!

But what code can we put in these methods?

nims

 

[timw]

They are called when the container wishes to persist the state of an existing bean to permanent store (ejbPassivate), or reload a previously persisted bean back into the pool(ejbActivate).

They are provided to allow the bean author to handle any special needs of the bean in this regard. For example, non-persistable resources used by the bean will need to be freed before the bean can be passivated, and likewise, re-established when the bean is reloaded from store.

They aren't really relevant for Stateless Session Beans, since these don't, by their nature, maintain a state. Stateful Session Beans, however, could realistically get passivated if they are not made us of within a defined length of time.

Tim
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