I created a filter - some kind of converter.
In the register method, I create an instance variable (i.e, @hexGrid = HexGrid.new(cellSize)) and use it in the filter method.
In a configuration file, I chain my own filter multiple times like this.
hex_field => 'orig_hex25'
cellSize => 25
hex_field => 'orig_hex50'
cellSize => 50
hex_field => 'orig_hex100'
cellSize => 100
I noticed that each time an event comes in and each time this event goes thru a configured filter, an instance variable in the register method gets created every time.
For example, if I have 3 filter configured for my own filter, 1 event comes in, then i see 3 different hexGrid instance variables created.
So, my ultimate question is, is there a way to instantiate an object once, then re-use it for subsequent events coming in?