javax.servlet.http.HttpSessionIdListener Maven / Gradle / Ivy

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package javax.servlet.http;

import java.util.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 {@link javax.servlet.annotation.WebListener},
 * or registered via one of the addListener methods defined on
 * {@link javax.servlet.ServletContext}.
 *
 * The order in which implementations of this interface are invoked is
 * unspecified.
 *
 * @since Servlet 3.1
 */

public interface HttpSessionIdListener extends EventListener {

    /**
     * Receives notification that session id has been changed in a
     * session.
     *
     * @param event the HttpSessionBindingEvent containing the session
     * and the name and (old) value of the attribute that was replaced
     *
     * @param oldSessionId the old session id
     */
    public void sessionIdChanged(HttpSessionEvent event, String oldSessionId);

}