Early steps - preconditions

First question that have to be decided if you want to integrate OpenID provider or Relaying party.

• OpenID provider - your application should provide all identity management usecases (login, change login ...), your application also should be able to provide it's identities to other applications
• Relaying party - you would like to allows to enter to you site to people with already existing identities. If you fully relay on OpenID that your application save usecase like login, change login and password ...

For successful coidi impementation you should be familiar with Tapestry 5mostly withIoC.