Re: SessionListener interacting with Tapestry services?

[John]

this works 
    auditDAO = registry.getService(AuditDAO.class);

but this does not
    log = registry.getService(Logger.class);

[ERROR] TapestryModule.RequestExceptionHandler Processing of request failed with
 uncaught exception: No service implements the interface org.slf4j.Logger.
java.lang.RuntimeException: No service implements the interface org.slf4j.Logger
  ----- Original Message ----- 
  From: Taha Hafeez Siddiqi 
  To: Tapestry users 
  Sent: Wednesday, May 01, 2013 9:55 AM
  Subject: Re: SessionListener interacting with Tapestry services?


  Hi John

  You can directly extract the registry from the ServetContext 

  using 
http://tapestry.apache.org/current/apidocs/org/apache/tapestry5/TapestryFilter.html#REGISTRY_CONTEXT_NAME


  Note: NOT TESTED

  public class MyListener implements HttpServletListener {
     
     public void sessionCreated(HttpServletRequest e){
        Registry registry = 
(Registry)e.getSession().getServletContext().getAttribute(TapestryFilter.REGISTRY_CONTEXT_NAME);
        MyDAO dao = registry.getService(MyDAO.class);
     }

  }

  regards
  Taha



  On 01-May-2013, at 2:19 PM, John <j...@quivinco.com> wrote:

  > I configure a SessionListener in web.xml:
  > 
  > <listener>
  > 
  > <listener-class>epulse.audit.manager.SessionListener</listener-class>
  > 
  > </listener>
  > 
  > And in the listener I have directly wired the Logger so:
  > 
  > public class SessionListener implements HttpSessionListener {
  > 
  > 
  > /** The log. */
  > 
  > private static Logger log = Logger.getLogger(SessionListener.class);
  > 
  > 
  > /** The audit log. */
  > 
  > @Inject
  > 
  > private AuditDAO auditDAO;    
  > 
  > 
  > I now want to inject a DAO to perform auditing but of course the 
SessionListener is managed by the web container, what to do?
  > 
  > As it happens at present the audit log is just a wrapper service for SLF4j 
so I can directly instantiate the audit logging the same as the regular log.
  > 
  > John