Sid List

List containing any type of Object intenteded to be indexed by status and id, making it easy to select all Objects for a given status, update the list, etc.

Introduction

Sid List is a list I created for one of the servers I developed. The idea behind it was to provide a list that could easily manage any type of objects and index them by status & id and be able to load and update itself with just a command once it had been extended.

As I had previously developed MdlSql (a modular sql gem), configuring the gem as I wanted proved itself clear and easy. For example, in case I wanted to make a list of instances which would be loaded from Mysql, it would go the following way:

require ‘mdlsql’ class InstanceList < SidList def load_hash results = MdlSql::select.from(:instances).where(:status, 1, ‘>’).execute end def update_hash time results = MdlSql::select.from(:instances).where(“status > 1 AND updated_at > #time”).execute end def new_obj obj_data obj = Instance.new obj_data end end

And with this I could just go straight to work with the list:

il = InstanceList.new il.load il.ready.first # Get the first of the ‘ready’ instance il.update

License

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <www.gnu.org/licenses/>.

In order to contact the author of this gem, please write to [email protected].