Enumerating all dbs in an environment

I need to open an environment and discover all of the databases. From what I understand, the database names are stored in the default, nameless db. But what encoding? Creating a db ends in a native method stub passing a String… UTF-8?

    Txn<ByteBuffer> txn = env.txn(null);
    env.openDbi(null).iterate(txn).forEachRemaining(kv -> {
      ByteBuffer keybytes = kv.key();
      String key = ??? 
    });

It would probably be useful to add both the ability to retrieve all dbi names to Env, as well as the ability to return all Dbis in an Env as a Map<String, Dbi>. The LMDB docs suggest that it is good practice to retrieve and re-use these anyway.

So I suppose this is mostly a question, but also a minor feature request.

[scottcarey]

Ah, and lastly, the changes now on master have one thing I don’t like:

getDbiNames returns null rather than an empty list when there are no names.

One other comment is that there should be some javadoc that indicates that this returns the keys from the default / null name Dbi, so that for users that are not using named databases it will return all of the keys in that Dbi which might cause OOM.

[benalexau]

I have implemented the changes suggested by @krisskross. Hope this helps with your use case, @scottcarey.