class Aspera::PersistencyActionOnce

Persist data on file system

Public Class Methods

new(options) click to toggle source

@param :manager Mandatory Database @param :data Mandatory object to persist, must be same object from begin to end (assume array by default) @param :ids Mandatory identifiers @param :delete Optional delete persistency condition @param :parse Optional parse method (default to JSON) @param :format Optional dump method (default to JSON) @param :merge Optional merge data from file to current data

# File lib/aspera/persistency_action_once.rb, line 14
def initialize(options)
  Log.log.debug("persistency: #{options}")
  raise "options shall be Hash" unless options.is_a?(Hash)
  raise "mandatory :manager" if options[:manager].nil?
  raise "mandatory :data" if options[:data].nil?
  raise "mandatory :ids (Array)" unless options[:ids].is_a?(Array)
  raise "mandatory 1 element in :ids" unless options[:ids].length >= 1
  @manager=options[:manager]
  @persisted_object=options[:data]
  @object_ids=options[:ids]
  # by default , at save time, file is deleted if data is nil
  @delete_condition=options[:delete] || lambda{|d|d.empty?}
  @persist_format=options[:format] || lambda {|h| JSON.generate(h)}
  persist_parse=options[:parse] || lambda {|t| JSON.parse(t)}
  persist_merge=options[:merge] || lambda {|current,file| current.concat(file).uniq rescue current}
  value=@manager.get(@object_ids)
  persist_merge.call(@persisted_object,persist_parse.call(value)) unless value.nil?
end

Public Instance Methods

save() click to toggle source
# File lib/aspera/persistency_action_once.rb, line 33
def save
  if @delete_condition.call(@persisted_object)
    @manager.delete(@object_ids)
  else
    @manager.put(@object_ids,@persist_format.call(@persisted_object))
  end
end