Class: SimpleMaster::Loader

Inherits:
Object
  • Object
show all
Defined in:
lib/simple_master/loader.rb,
lib/simple_master/loader/query_loader.rb,
lib/simple_master/loader/dataset_loader.rb,
lib/simple_master/loader/marshal_loader.rb

Direct Known Subclasses

DatasetLoader, MarshalLoader, QueryLoader

Defined Under Namespace

Classes: DatasetLoader, MarshalLoader, QueryLoader

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Loader

Returns a new instance of Loader.



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# File 'lib/simple_master/loader.rb', line 7

def initialize(options = {})
  @options = options
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/simple_master/loader.rb', line 5

def options
  @options
end

Instance Method Details

#build_records(klass, raw) ⇒ Object

Interface for building records from raw data.



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# File 'lib/simple_master/loader.rb', line 42

def build_records(klass, raw)
  fail NotImplementedError
end

#globalize(table) ⇒ Object 



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# File 'lib/simple_master/loader.rb', line 46

def globalize(table)
  return unless options[:globalize_proc]
  table.all = options[:globalize_proc].call(table.klass, table.all)
end

#load_records(table) ⇒ Object

Returns if records are updated in table.



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# File 'lib/simple_master/loader.rb', line 12

def load_records(table)
  klass = table.klass
  fail "Load target not available." unless klass.base_class?

  raw = read_raw(table)

  new_digest = table.diff.nil? ? raw.hash : "#{raw.hash}/#{table.diff.hash}"
  if new_digest == table.digest
    return false
  end

  table.digest = new_digest
  table.all = build_records(klass, raw).freeze
  globalize(table)

  table.apply_diff

  table.update_sub_tables

  klass.reset_object_cache

  true
end

#read_raw(table) ⇒ Object

Interface for loader loading raw data, for building records and table digest.



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# File 'lib/simple_master/loader.rb', line 37

def read_raw(table)
  fail NotImplementedError
end