boolean  logoutAuthN(java.util.Map authnIdentifiers,
  javax.servlet.http.HttpServletRequest req, 
  javax.servlet.http.HttpServletResponse resp,     
  java.lang.String  resumePath)    
  throws AuthnAdapterException,

During SLO request processing, PingFederate invokes your IdP adapter's logoutAuthN() method to terminate a user's session. This method is invoked during IdP- or SP-initiated SLO requests.

Like the lookupAuthN() method, the logoutAuthN() method has access to the user's HttpServletRequest and HttpServletResponse objects. Use these objects to retrieve data about the user's session and to redirect the browser to an endpoint used to terminate the session at the application. Again, the resumePath parameter contains the URL to which the user is redirected to complete the SLO process.