tml?is-external=true" title="class or interface in java.util">EventListener</a></pre>
<div class="block">Interface for receiving notification events about HttpSession
 attribute changes.

 <p>In order to receive these notification events, the implementation
 class must be either declared in the deployment descriptor of the web
 application, annotated with <a href="../../../javax/servlet/annotation/WebListener.html" title="annotation in javax.servlet.annotation"><code>WebListener</code></a>,
 or registered v