Package jakarta.servlet

Interface ServletContextAttributeListener

All Superinterfaces:
EventListener
public interface ServletContextAttributeListener
extends EventListener
Interface for receiving notification events about ServletContext attribute 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 2.3
See Also:
ServletContextAttributeEvent

  • Method Details

    • attributeAdded

      default void attributeAdded​(ServletContextAttributeEvent event)
      Receives notification that an attribute has been added to the ServletContext.
      Implementation Requirements:
      The default implementation takes no action.
      Parameters:
      event - the ServletContextAttributeEvent containing the ServletContext to which the attribute was added, along with the attribute name and value

    • attributeRemoved

      default void attributeRemoved​(ServletContextAttributeEvent event)
      Receives notification that an attribute has been removed from the ServletContext.
      Implementation Requirements:
      The default implementation takes no action.
      Parameters:
      event - the ServletContextAttributeEvent containing the ServletContext from which the attribute was removed, along with the attribute name and value

    • attributeReplaced

      default void attributeReplaced​(ServletContextAttributeEvent event)
      Receives notification that an attribute has been replaced in the ServletContext.
      Implementation Requirements:
      The default implementation takes no action.
      Parameters:
      event - the ServletContextAttributeEvent containing the ServletContext in which the attribute was replaced, along with the attribute name and its old value