Using callback to return variable

Would there be a better way to do the following:

Code (Text):

    UUID test = null;
    public UUID nameToUUIDTest(final String name) {
        util.nameToUUIDTest(name, new Callback<UUID>() {
            @Override
            public void onSuccess(final UUID done) {
                test = done;
                return;
            }
           
            @Override
            public void onFailure(final Throwable cause) {
                if (cause != null) {
                    cause.printStackTrace();
                }
            }

            @Override
            public void onDuplicate(String name) {
                // TODO Auto-generated method stub
            }
        });
       
        return test;

          //Previous method (no async)        return util.nameToUUID(name);
    }

MySQL Call:

Code (Text):

    public void nameToUUIDTest(final String name, final Callback<UUID> callback) {
        Bukkit.getScheduler().runTaskAsynchronously(plugin, new Runnable() {
            @SuppressWarnings("deprecation")
            @Override
            public void run() {
                Connection connection = null;
                PreparedStatement ps = null;
                ResultSet result = null;
                try {
                    connection = pool.getConnection();
                    ps = connection.prepareStatement("SELECT * FROM players WHERE UPPER(Username)=?");
                    ps.setString(1, name.toUpperCase());
                    result = ps.executeQuery();
                    UUID uuid = null;
                    int count = 0;
                    while (result.next()) {
                        uuid = UUID.fromString(result.getString("UUID"));
                        ++count;
                    }
                    if (count > 1) {
                        sql.handleDuplicateNames(Bukkit.getOfflinePlayer(name));
                        callback.onDuplicate(name);
                        //Previous return (no async) return nameToUUID(name);
                    }
                    callback.onSuccess(uuid);
                } catch (SQLException e) {
                    e.printStackTrace();
                    callback.onFailure(e);
                } finally {
                    pool.close(connection, ps, null);
                }
            }
        });
    }

Im trying to return the UUID of a player from their name stored in a database by doing this. This current method works, but it returns the previous saved variable test upon first execution. Im running the MySQL call on an async thread so i created a callback method to return the UUID. I also havent included the method to return duplicate names either. Any suggestions on improving this code would be nice as well.

 

Bump, any help appreciated.