Single logon

[Anita Srivastava, modificado hace 15 años.]

Hello,
We have created some common logins, so that we developer can go on website and test our portlets. I want to know that how can I have a only single logon, means if some one is already logged on with common login and other person wants to logon with the same login he/she gets an error the login is already in use or somthing.

thanks,
anita

[Christianto Sahat, modificado hace 15 años.]

You can take a look at Enterprise Admin portlet -> Monitoring tab. The action is implemented in this jsp file :
portal-web/docroot/html/portlet/enterprise_admin/view.jsp
Find a line which consists of tabs1.equals("monitoring")
You can see that it use

com.liferay.portal.liveusers.LiveUsers class to retrieve all active user, along with their session id

Iterator itr = LiveUsers.getSessionUsers(company.getCompanyId()).entrySet().iterator();

Using this util class, you can check whether the user is already login. Information about logged in users is maintained in UserTracker table.