Class: Embulk::InputRandom

Inherits:
InputPlugin
  • Object
show all
Defined in:
lib/embulk/input_random.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(task, schema, index, page_builder) ⇒ InputRandom

Returns a new instance of InputRandom.



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# File 'lib/embulk/input_random.rb', line 39

def initialize(task, schema, index, page_builder)
  super
end

Class Method Details

.transaction(config, &control) ⇒ Object 



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# File 'lib/embulk/input_random.rb', line 8

def self.transaction(config, &control)
  schema = config.param('schema', :hash)
  rows = config.param('rows', :integer, default: 5000)
  threads = config.param('threads', :integer, default: 1)

  columns = schema.each_with_index.map{|column, index|
    attr, type = column
    # TODO: type should more flexible
    case type.downcase
    when "boolean"
      Column.new(index, attr, :boolean)
    when "string"
      Column.new(index, attr, :string)
    when "integer", "int", "long", "primary_key"
      Column.new(index, attr, :long)
    when "double", "float"
      Column.new(index, attr, :double)
    when "date"
      Column.new(index, attr, :timestamp)
    end
  }

  task = {'schema' => schema, 'rows' => rows}

  puts "Random generation started."
  commit_reports = yield(task, columns, threads)
  puts "Random input finished. Commit reports = #{commit_reports.to_json}"

  return {}
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/embulk/input_random.rb', line 43

def run
  puts "Random generator input thread #{@index}..."
  rows = @task['rows']
  schema = @task['schema']

  rows.times{|n|
    @page_builder.add(schema.map{|attr, type|
                        case type
                        when "string"
                          SecureRandom.urlsafe_base64(32)
                        when "integer", "int", "long"
                          (Random.rand * 10000).to_i
                        when "primary_key"
                          n
                        when 'float', 'double'
                          Random.rand * 10000
                        when 'date'
                          Time.at(rand * Time.now.to_f)
                        else
                          raise "unknown type: #{type}"
                        end
                      })
  }
  @page_builder.finish

  {  # commit report
    "rows" => rows,
    "columns" => schema.size
  }
end