Class: Tango::ETL::OperatorInterface

Inherits:

Object

• Object
• Tango::ETL::OperatorInterface

Defined in:

lib/tango/etl/operator_interface.rb

Overview

Interface of an operator that implements ETL pattern

Author:

• Mckomo

Class Method Summary

• .extract(element) ⇒ Object

  Extract resource params.

• .load(resources) ⇒ Object

  Load resources into a storage.

• .transform(resource) ⇒ Object

  Transform resource params to desired state.

Class Method Details

.extract(element) ⇒ Object

Extract resource params

Parameters:

• element (Object) —

  Element from witch resources should be extracted

Returns:

• (Object) —

  Extracted resource or array with resources

Raises:

• (NotImplementedError)

# File 'lib/tango/etl/operator_interface.rb', line 14

def self.extract( element )
  raise NotImplementedError
end

.load(resources) ⇒ Object

Load resources into a storage

Parameters:

• resources (Array) —

  Batch of resources to load

Raises:

• (NotImplementedError)

# File 'lib/tango/etl/operator_interface.rb', line 29

def self.load( resources )
  raise NotImplementedError
end

.transform(resource) ⇒ Object

Transform resource params to desired state

Parameters:

• resource (Object) —

  Resource or array with resources

Returns:

• (Object) —

  Transformed resource or array with resources

Raises:

• (NotImplementedError)

# File 'lib/tango/etl/operator_interface.rb', line 22

def self.transform( resource )
  raise NotImplementedError
end