Richard Thomas has posted another "Solar Short" to his PHPJack blog today dealing with a method for using multiple authentication methods in a single Solar framework installation.
What if you want to use multiple methods? OpenID? Facebook Connect? Saml? or one of the other dozen+ solutions that you might use.. What to do? One thing to keep in mind, Auth happens really early in the bootstrapping process so things like SQL may not be available yet unless you specifically loaded it in the config.. Then you need to load the proper auth module and call it as needed..
He includes a code example of how it would work - extending the Solar_Auth_Adapter to create a single "multi-adapter" with a switch to evaluate and load/use the correct authentication method. It uses the Solar_Config object to set the Auth Adapter when it's loaded so you can even use multiples in the same page load if you need it.