Class: Drudgery::Job

Inherits:
Object
  • Object
show all
Defined in:
lib/drudgery/job.rb

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Job

Returns a new instance of Job.



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# File 'lib/drudgery/job.rb', line 3

def initialize(options={})
  @extractor    = options[:extractor]
  @loader       = options[:loader]
  @transformer  = options[:transformer]
  @batch_size   = options[:batch_size] || 1000

  @records = []
end

Instance Method Details

#batch_size(size) ⇒ Object 



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# File 'lib/drudgery/job.rb', line 12

def batch_size(size)
  @batch_size = size
end

#extract(*args) {|extractor| ... } ⇒ Object

Yields:

  • (extractor) 


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# File 'lib/drudgery/job.rb', line 16

def extract(*args)
  if args.first.kind_of?(Symbol)
    extractor = Drudgery::Extractors.instantiate(*args)
  else
    extractor = args.first
  end

  yield extractor if block_given?

  @extractor = extractor
end

#load(*args) {|loader| ... } ⇒ Object

Yields:

  • (loader) 


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# File 'lib/drudgery/job.rb', line 34

def load(*args)
  if args.first.kind_of?(Symbol)
    loader = Drudgery::Loaders.instantiate(*args)
  else
    loader = args.first
  end

  yield loader if block_given?

  @loader = loader
end

#perform ⇒ Object 



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# File 'lib/drudgery/job.rb', line 46

def perform
  extract_records do |record|
    @records << record

    if @records.size == @batch_size
      load_records
    end
  end

  load_records
end

#transform(transformer = Drudgery::Transformer.new, &processor) ⇒ Object 



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# File 'lib/drudgery/job.rb', line 28

def transform(transformer=Drudgery::Transformer.new, &processor)
  transformer.register(processor)

  @transformer = transformer
end