I would look at using a Spring listener rather than a servlet
listener. Servlet listeners weren't required to initialize in a
specific order until Servlet 2.5 (I believe).
On Apr 22, 2010, at 5:40 PM, Juan Antonio <juan....@tecnosfera.org>
wrote:
Hello everybody.
I'm trying to save some data related to an user when login. I am
using the
UserCounterListener.java:
public void attributeAdded(HttpSessionBindingEvent event) {
if (event.getName().equals(EVENT_KEY) && !isAnonymous()) {
SecurityContext securityContext = (SecurityContext)
event.getValue();
if (securityContext.getAuthentication().getPrincipal()
instanceof User) {
User user = (User)
securityContext.getAuthentication().getPrincipal();
log.debug("Creating default data to the user " +
user.getId());
//Inserting the data
UserData userData =
userDataManager.getClientData(user.getId().longValue());
addUsername(user);
}
}
}
The method returns an error:
java.lang.NullPointerException
at
com.proyecto.webapp.listener.UserCounterListener.attributeAdded
(UserCounterListener.java:126)
at
org.mortbay.jetty.servlet.AbstractSessionManager$Session.setAttribute
(AbstractSessionManager.java:1077)
at
org.springframework.security.context.HttpSessionContextIntegrationFilter.storeSecurityContextInSession(
HttpSessionContextIntegrationFilter.java:392)
...
when i login with the default admin:admin user.
Even the program never reach the method getClientData() in the
UserDataManager.
What i am doing wrong? May be, it's not possible to access to a
service from
a Listener?
thank you.
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