Package com.google.appengine.api.users

Provides facilities to check if a user has authenticated, retrieve their email address, and check if they are an administrator for this application. It can also be used to construct a URL for users to login or logout.

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

 <%
   UserService userService = UserServiceFactory.getUserService();
   if (!userService.isUserLoggedIn()) {
 %>
    Please {@code <a href="<%=userService.createLoginURL("/newlogin.jsp")>">log in</a>>}
 <% } else { %>
    Welcome, <%= userService.getCurrentUser().getNickname(); %>!
      {@code (<a href="<%=userService.createLogoutURL("/")>">log out</a>>)}
 <%
   }
 %>
 

See Also:

UserService, The Users Java API in the Google App Engine Developer's Guide.

Interface Summary

Interface	Description
IUserServiceFactory	This interface should be implemented by providers of the UserService and registered with ServiceFactoryFactory.
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

Class	Description
IUserServiceFactoryProvider	Creates IUserServiceFactory implementations.
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

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