Class: Sqlyzer::Handler

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/sqlyzer/handler.rb

Overview

Singleton class handling generation and execution of all Sql commands. This is the only place where Sql requests are executed.

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.request(sender, action) ⇒ Object

Static method called by Sqlyzer::Serializer to request execution and generation of every Sql command. The command to generate and execute is determined by action Symbol value :

  • :sql_select,

  • :sql_insert,

  • :sql_update,

  • :sql_delete.

When action value is :sql_select, this method restore all sender attributes from data returned by generated Sql SELECT command execution.

When sender call this method for the first time, it is automatically registered through register_sender.

TODO: This method is very trivial for now, but further optimizations of Sql commands execution timelime have to go there.



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# File 'lib/sqlyzer/handler.rb', line 66

def     Handler.request(sender, action)
  Handler.instance.register_sender sender
  case action
  when :sql_select then
    Db::query(sender.sql_serialize(:sql_select)) { |data|
      data.each { |key, value|
        attrib = sender.sql_container_values[key]
        if attrib.nil?
          sender.sql_container_keys[key].to_owner(sender, value)
        else
          attrib.to_owner(sender, value)
        end
      }
    }
  else
    Db::do(sender.sql_serialize(action))
  end
  nil
end

Instance Method Details

#register_sender(sender) ⇒ Object

Register an instance of class extended with Sqlyzer::Serializer. This method will create the Sql table associated with sender class if there is no table named like sender#sql_container_table().



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# File 'lib/sqlyzer/handler.rb', line 41

def     register_sender(sender)
  Db::do sender.sql_serialize(:sql_table) unless
    Db::tables.include?(sender.sql_container_table)
end