# Package org.apache.catalina.users

- Class Summary
  Class | Description
  --- | ---
  AbstractGroup | Convenience base class for `Group` implementations.
  AbstractRole | Convenience base class for `Role` implementations.
  AbstractUser | Convenience base class for `User` implementations.
  Constants | Manifest constants for this Java package.
  MemoryGroup | Concrete implementation of `Group` for the `MemoryUserDatabase` implementation of `UserDatabase`.
  MemoryRole | Concrete implementation of `Role` for the `MemoryUserDatabase` implementation of `UserDatabase`.
  MemoryUser | Concrete implementation of `User` for the `MemoryUserDatabase` implementation of `UserDatabase`.
  MemoryUserDatabase | Concrete implementation of `UserDatabase` that loads all defined users, groups, and roles into an in-memory data structure, and uses a specified XML file for its persistent storage.
  MemoryUserDatabaseFactory | JNDI object creation factory for `MemoryUserDatabase` instances.

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