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[[core-registeringEventListener]]
=== Registering an Event Listener

Enable events with `grails.plugin.springsecurity.useSecurityEventListener = true` and create one or more Groovy or Java classes, for example:

[source,groovy]
.`MySecurityEventListener.groovy`
----
package com.foo.bar

import org.springframework.context.ApplicationListener
import org.springframework.security.authentication.event.AuthenticationSuccessEvent

class MySecurityEventListener
      implements ApplicationListener<AuthenticationSuccessEvent> {

   void onApplicationEvent(AuthenticationSuccessEvent event) {
      // handle the event
   }
}
----

Register the class in `grails-app/conf/spring/resources.groovy`:

[source,groovy]
.Listing {counter:listing}. Registration of the event listener bean in `resources.groovy`
----
import com.foo.bar.MySecurityEventListener

beans = {
   mySecurityEventListener(MySecurityEventListener)
}
----
