ServletContextAttributeListener (Servlet and JavaServer Pages API Documentation)

All Superinterfaces:

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

Since:

v 2.3

See Also:

ServletContextAttributeEvent

Method Summary

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

- Method Detail
  - attributeAdded
```
void attributeAdded(ServletContextAttributeEvent scab)
```
    Notification that a new attribute was added to the servlet context. Called after the attribute is added.
  - attributeRemoved
```
void attributeRemoved(ServletContextAttributeEvent scab)
```
    Notification that an existing attribute has been remved from the servlet context. Called after the attribute is removed.
  - attributeReplaced
```
void attributeReplaced(ServletContextAttributeEvent scab)
```
    Notification that an attribute on the servlet context has been replaced. Called after the attribute is replaced.