Memory-only mode and transactions/locking

[Elissa Newman]

Does Derby have a mode such that it runs in memory only? I am working on a project that needs the database to run in memory and not go to the disk at all (the amount of memory we have for our system should suffice for the database size we will have). I reviewed the available documentation and did not see a setting for something like this.   Also, we do not require transactions or locking. Is there a way to turn these off?   Thanks for your help, Elissa