ServletContextAttributeListener (Servlet 5.0 API Documentation - Apache Tomcat 10.0.27)

All Superinterfaces:

java.util.EventListener
```
public interface ServletContextAttributeListener
extends java.util.EventListener
```
Implementations of this interface receive notifications of changes to the attribute list on the servlet context of a web application. To receive notification events, the implementation class must be configured in the deployment descriptor for the web application.

Since:

Servlet 2.3

See Also:

ServletContextAttributeEvent

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default void`	`attributeAdded(ServletContextAttributeEvent scae)`	Notification that a new attribute was added to the servlet context.
`default void`	`attributeRemoved(ServletContextAttributeEvent scae)`	Notification that an existing attribute has been removed from the servlet context.
`default void`	`attributeReplaced(ServletContextAttributeEvent scae)`	Notification that an attribute on the servlet context has been replaced.

- Method Detail
  - attributeAdded
```
default void attributeAdded(ServletContextAttributeEvent scae)
```
    Notification that a new attribute was added to the servlet context. Called after the attribute is added. The default implementation is a NO-OP.
    
    Parameters:
    
    scae - Information about the new attribute
  - attributeRemoved
```
default void attributeRemoved(ServletContextAttributeEvent scae)
```
    Notification that an existing attribute has been removed from the servlet context. Called after the attribute is removed. The default implementation is a NO-OP.
    
    Parameters:
    
    scae - Information about the removed attribute
  - attributeReplaced
```
default void attributeReplaced(ServletContextAttributeEvent scae)
```
    Notification that an attribute on the servlet context has been replaced. Called after the attribute is replaced. The default implementation is a NO-OP.
    
    Parameters:
    
    scae - Information about the replaced attribute