HttpSessionIdListener (Java Servlet 4.0)

All Superinterfaces:

EventListener
```
public interface HttpSessionIdListener
extends EventListener
```
Interface for receiving notification events about HttpSession id changes.
In order to receive these notification events, the implementation class must be either declared in the deployment descriptor of the web application, annotated with WebListener, or registered via one of the addListener methods defined on ServletContext.
The order in which implementations of this interface are invoked is unspecified.

Since:

Servlet 3.1

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`sessionIdChanged(HttpSessionEvent event, String oldSessionId)`	Receives notification that session id has been changed in a session.

- Method Detail
  - sessionIdChanged
```
void sessionIdChanged(HttpSessionEvent event,
                      String oldSessionId)
```
    Receives notification that session id has been changed in a session.
    
    Parameters:
    
    event - the HttpSessionBindingEvent containing the session and the name and (old) value of the attribute that was replaced
    
    oldSessionId - the old session id