EventListener Example

package com.atlassian.confluence.extra.userlister;

import com.atlassian.confluence.event.EventListener;
import com.atlassian.confluence.event.events.ConfluenceEvent;
import com.atlassian.confluence.event.events.LoginEvent;
import com.atlassian.confluence.event.events.LogoutEvent;
import com.atlassian.plugin.PluginManager;
import bucket.container.ContainerManager;

public class UserListener implements EventListener
{
    private UserLister userLister;
    private PluginManager pluginManager;

    Class[] handledClasses = new Class[]{ LoginEvent.class, LogoutEvent.class};

    public void handleEvent(ConfluenceEvent event)
    {
        if (event instanceof LoginEvent)
        {
            LoginEvent loginEvent = (LoginEvent) event;
            getUserLister().userLoggedIn(loginEvent.getUsername(), loginEvent.getSessionId());
        }
        else if (event instanceof LogoutEvent)
        {
            LogoutEvent logoutEvent = (LogoutEvent) event;
            getUserLister().userLoggedIn(logoutEvent. getUsername(), logoutEvent.getSessionId());
        }

    }

    public UserLister getUserLister()
    {
        if (userLister == null)
        {
            if (pluginManager == null)
            {
                pluginManager = (PluginManager) ContainerManager.getInstance().getContainerContext().getComponent("pluginManager");

                userLister = (UserLister) pluginManager.getEnabledPluginModule("userlister");
            }
        }

        return userLister;
    }

    public Class[] getHandledEventClasses()
    {
        return handledClasses;
    }
}