Package com.google.appengine.api.users

The UserService provides facilities to check whether a user has authenticated using their Google Account, retrieve their email address, and check whether they are an administrator for this application.

See:
Description

Interface Summary

UserService

The UserService provides information useful for forcing a user to log in or out, and retrieving information about the user who is currently logged-in.

Class Summary

User	User represents a specific user, represented by the combination of an email address and a specific Google Apps domain (which we call an authDomain).
UserServiceFactory	Creates a UserService.

Exception Summary

UserServiceFailureException

UserServiceFailureException is thrown when any unknown error occurs while communicating with the user service.

Package com.google.appengine.api.users Description

The UserService provides facilities to check whether a user has authenticated using their Google Account, retrieve their email address, and check whether they are an administrator for this application. It can also be used to construct a URL for users to login or logout. More information is available in the on-line documentation.

As an example, your application might, in a JSP file, have code like this:

   <%
     UserService userService = UserServiceFactory.getUserService();
     if (!userService.isUserLoggedIn()) {
   %>
      Please <A HREF="<%= 
          userService.createLoginURL("/newlogin.jsp") 
        %>">log in</A>>
   <% } else { %>
      Welcome, <%= userService.currentUser().getNickname(); %>!
        (<A HREF="<%= 
            userService.createLogoutURL("/")
          %>">log out</A>>)
   <%
     }
   %>