HttpSessionActivationListener (Java Servlet 4.0)

All Superinterfaces:

EventListener
```
public interface HttpSessionActivationListener
extends EventListener
```
Objects that are bound to a session may listen to container events notifying them that sessions will be passivated and that session will be activated. A container that migrates session between VMs or persists sessions is required to notify all attributes bound to sessions implementing HttpSessionActivationListener.

Since:

Servlet 2.3

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default void`	`sessionDidActivate(HttpSessionEvent se)`	Notification that the session has just been activated.
`default void`	`sessionWillPassivate(HttpSessionEvent se)`	Notification that the session is about to be passivated.

- Method Detail
  - sessionWillPassivate
```
default void sessionWillPassivate(HttpSessionEvent se)
```
    Notification that the session is about to be passivated.
    
    Implementation Requirements:
    
    The default implementation takes no action.
    
    Parameters:
    
    se - the HttpSessionEvent indicating the passivation of the session
  - sessionDidActivate
```
default void sessionDidActivate(HttpSessionEvent se)
```
    Notification that the session has just been activated.
    
    Implementation Requirements:
    
    The default implementation takes no action.
    
    Parameters:
    
    se - the HttpSessionEvent indicating the activation of the session