HttpSessionBindingListener (Java Servlet 4.0)

All Superinterfaces:

EventListener
```
public interface HttpSessionBindingListener
extends EventListener
```
Causes an object to be notified when it is bound to or unbound from a session. The object is notified by an HttpSessionBindingEvent object. This may be as a result of a servlet programmer explicitly unbinding an attribute from a session, due to a session being invalidated, or due to a session timing out.

Author:

Various

See Also:

HttpSession, HttpSessionBindingEvent

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default void`	`valueBound(HttpSessionBindingEvent event)`	Notifies the object that it is being bound to a session and identifies the session.
`default void`	`valueUnbound(HttpSessionBindingEvent event)`	Notifies the object that it is being unbound from a session and identifies the session.

- Method Detail
  - valueBound
```
default void valueBound(HttpSessionBindingEvent event)
```
    Notifies the object that it is being bound to a session and identifies the session.
    
    Implementation Requirements:
    
    The default implementation takes no action.
    
    Parameters:
    
    event - the event that identifies the session
    
    See Also:
    
    valueUnbound(javax.servlet.http.HttpSessionBindingEvent)
  - valueUnbound
```
default void valueUnbound(HttpSessionBindingEvent event)
```
    Notifies the object that it is being unbound from a session and identifies the session.
    
    Implementation Requirements:
    
    The default implementation takes no action.
    
    Parameters:
    
    event - the event that identifies the session
    
    See Also:
    
    valueBound(javax.servlet.http.HttpSessionBindingEvent)