Repository Pattern example

fmp_repository.rb

# FileMaker Pro!
module Simple
  class FMPRepository

    attr_reader :cases

    def initialize
      @cases = []
    end

    def add(matter)
      @cases << matter
    end

    def save
      require 'jdbc-helper'
      conn = JDBCHelper::FileMaker.connect("localhost", "username", "password", "db")
      @cases.each do |matter|
        query = "INSERT INTO ..."
        conn.execute(query)
      end
      conn.close
    end

    def empty
      @cases = []
    end

  end
end

in_memory_repository.rb

# In-Memory
module Simple
  class InMemoryRepository

    def initialize
      @cache = []
    end

    def save(obj)
      @cache << obj
    end

    def count
      @cache.length
    end
  end
end

repository.rb

module Simple
  class Repository
    def self.configure(options = {})
      @mappings ||= {}
      @mappings.merge!(options)
    end

    def self.reset!
      @mappings = {}
    end

    def self.for(model_class_or_name)
      @mappings[model_class_or_name] || @mappings[model_class_or_name.to_s]
    end
  end
end