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Module: ActiveSupport::DescendantsTracker

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Extended In:
Defined in: activesupport/lib/active_support/descendants_tracker.rb

Overview

This module provides an internal implementation to track descendants which is faster than iterating through ObjectSpace.

Class Method Summary

Instance Method Summary

Class Method Details

.clear

[ GitHub ]

  
# File 'activesupport/lib/active_support/descendants_tracker.rb', line 18

def clear
  if defined? ActiveSupport::Dependencies
    @@direct_descendants.each do |klass, descendants|
      if ActiveSupport::Dependencies.autoloaded?(klass)
        @@direct_descendants.delete(klass)
      else
        descendants.reject! { |v| ActiveSupport::Dependencies.autoloaded?(v) }
      end
    end
  else
    @@direct_descendants.clear
  end
end

.descendants(klass)

[ GitHub ]

  
# File 'activesupport/lib/active_support/descendants_tracker.rb', line 12

def descendants(klass)
  arr = []
  accumulate_descendants(klass, arr)
  arr
end

.direct_descendants(klass)

[ GitHub ]

  
# File 'activesupport/lib/active_support/descendants_tracker.rb', line 8

def direct_descendants(klass)
  @@direct_descendants[klass] || []
end

.store_inherited(klass, descendant)

This is the only method that is not thread safe, but is only ever called during the eager loading phase.

[ GitHub ]

  
# File 'activesupport/lib/active_support/descendants_tracker.rb', line 34

def store_inherited(klass, descendant)
  (@@direct_descendants[klass] ||= []) << descendant
end

Instance Method Details

#descendants

[ GitHub ]

  
# File 'activesupport/lib/active_support/descendants_tracker.rb', line 56

def descendants
  DescendantsTracker.descendants(self)
end

#direct_descendants

[ GitHub ]

  
# File 'activesupport/lib/active_support/descendants_tracker.rb', line 52

def direct_descendants
  DescendantsTracker.direct_descendants(self)
end

#inherited(base)

[ GitHub ]

  
# File 'activesupport/lib/active_support/descendants_tracker.rb', line 47

def inherited(base)
  DescendantsTracker.store_inherited(self, base)
  super
end