# File lib/rbot/dbhash.rb, line 96
    def initialize(bot, key, absfilename=false)
      @bot = bot
      @key = key
      if @@env.nil?
        begin
          @@env = BDB::Env.open("#{@bot.botclass}", BDB::INIT_TRANSACTION | BDB::CREATE | BDB::RECOVER, "set_lg_max" => @@lg_max)
          debug "DBTree: environment opened with max log size #{@@env.conf['lg_max']}"
        rescue => e
          debug "DBTree: failed to open environment: #{e.pretty_inspect}. Retrying ..."
          @@env = BDB::Env.open("#{@bot.botclass}", BDB::INIT_TRANSACTION | BDB::CREATE |  BDB::RECOVER)
        end
        #@@env = BDB::Env.open("#{@bot.botclass}", BDB::CREATE | BDB::INIT_MPOOL | BDB::RECOVER)
      end

      if absfilename && File.exist?(key)
        # db already exists, use it
        @db = DBTree.open_db(key)
      elsif absfilename
        # create empty db
        @db = DBTree.create_db(key)
      elsif File.exist?(@bot.botclass + "/#{key}.db")
        # db already exists, use it
        @db = DBTree.open_db(@bot.botclass + "/#{key}.db")
      else
        # create empty db
        @db = DBTree.create_db(@bot.botclass + "/#{key}.db")
      end
    end