Question

I am new to java also at Google Apps, I am using Eclipse.

I want to create a simple app that perform SSO in java with google.

i have done the demo app that will host over google app engine, it is working fine using
google plugin
how can i do it with my app running on my server.

thanks

Answer 1

Look at GAE: Configuring Your App’s Authentication article. After configuring it you can check user using The Users Java API invoking:

UserService userService = UserServiceFactory.getUserService();
User user = userService.getCurrentUser();

This is the simplest way. There are many other. Like using OpenID described here: http://code.google.com/p/gwt-gae-book/wiki/Authentication

You can also create your own auth servlet filter wchich redirects users to userService.createLoginURL URL if needed.