Sometime seam listener does not work correctly...
hi,all
i use Seam 1.2.1GA security and event listener to trigger logout() from authenticator when user session is time out. But it didnot work sometime.
Here is my configuration in components.xml
<event type="org.jboss.seam.preDestroyContext.SESSION">
<action expression="#{authenticator.logout}" />
</event>
authenticator:
@Stateless
@Name("authenticator")
public class AuthenticatorBean implements Authenticator{
@In
private Identity identity;
@In
private FacesMessages facesMessages;
@Logger
private Log log;
public boolean authenticate() {
String username = identity.getUsername();
String password = identity.getPassword();
if(username.equalsIgnoreCase("xinhua")){
return true;
}else{
facesMessages.addFromResourceBundle("loginForm_loginFailed");
return false;
}
}
public void logout() {
log.info("logout(): user "+identity.getUsername()+" logout");
identity.logout();
}
}
When user session is out of time, a null exception appears sometime.And logout() is skipped...
17:52:40,793 ERROR [[/strato]] Session event listener threw exception java.lang.NullPointerException: facesContext at org.apache.myfaces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:110) at org.jboss.seam.actionparam.ActionParamBindingHelper.invokeTheExpression(ActionParamBindingHelper.java:58) at org.jboss.seam.actionparam.ActionParamMethodBinding.invoke(ActionParamMethodBinding.java:75) at org.jboss.seam.core.Expressions$2.invoke(Expressions.java:148) at org.jboss.seam.core.Events.raiseEvent(Events.java:63) at org.jboss.seam.contexts.Contexts.destroy(Contexts.java:215) at org.jboss.seam.contexts.Lifecycle.endSession(Lifecycle.java:297) at org.jboss.seam.servlet.SeamListener.sessionDestroyed(SeamListener.java:45) at org.apache.catalina.session.StandardSession.expire(StandardSession.java:687) at org.apache.catalina.session.StandardSession.isValid(StandardSession.java:579) at org.apache.catalina.session.ManagerBase.processExpires(ManagerBase.java:678) at org.apache.catalina.session.ManagerBase.backgroundProcess(ManagerBase.java:663) at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1284) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1569) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1578) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1578) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1558) at java.lang.Thread.run(Thread.java:595) 17:52:49,059 INFO [Lifecycle] starting up: org.jboss.seam.security.identity 17:54:40,891 ERROR [[/strato]] Session event listener threw exception java.lang.IllegalStateException: Please end the HttpSession via Seam.invalidateSession() at org.jboss.seam.contexts.Lifecycle.endSession(Lifecycle.java:269) at org.jboss.seam.servlet.SeamListener.sessionDestroyed(SeamListener.java:45) at org.apache.catalina.session.StandardSession.expire(StandardSession.java:687) at org.apache.catalina.session.StandardSession.isValid(StandardSession.java:579) at org.apache.catalina.session.ManagerBase.processExpires(ManagerBase.java:678) at org.apache.catalina.session.ManagerBase.backgroundProcess(ManagerBase.java:663) at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1284) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1569) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1578) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1578) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1558) at java.lang.Thread.run(Thread.java:595)
the listener is not stable when sessionDestroyed. :(
anyone can tell me why?
thanks!
