If you are just trying to implement authentication and authorization, the transition to Play 2.0, of course, is not required. In addition, the transition from 1.x to 2.0 is not so simple, depending on the complexity of your application. There are some fairly significant differences between the two main versions of the structure. Reauthentication later will not be the biggest of your worries if you embark on a migration mission.
To authorize Play 1.2.4, I can recommend the Deadbolt module , it is very flexible, but it can easily start working. For authentication, the core secure module can be expanded to meet most needs.
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