Class: GenericCountingPool

Inherits:
GenericPool show all
Defined in:
lib/volt/utils/generic_counting_pool.rb

Overview

A counting pool behaves like a normal GenericPool, except for each time lookup is called, remove should be called when complete. The item will be completely removed from the GenericCountingPool only when it has been removed an equal number of times it has been looked up.

Direct Known Subclasses

ModelIdentityMap

Instance Attribute Summary

Attributes inherited from GenericPool

#pool

Instance Method Summary collapse

Methods inherited from GenericPool

#create_new_item, #initialize, #lookup_all

Constructor Details

This class inherits a constructor from GenericPool

Instance Method Details

#find(*args, &block) ⇒ Object

Finds an item and tracks that it was checked out. Use #remove when the item is no longer needed.



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# File 'lib/volt/utils/generic_counting_pool.rb', line 16

def find(*args, &block)
  item = __lookup(*args, &block)

  item[0] += 1

  return item[1]
end

#generate_new(*args) ⇒ Object

return a created item with a count



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# File 'lib/volt/utils/generic_counting_pool.rb', line 10

def generate_new(*args)
  [0, create(*args)]
end

#lookup(*args, &block) ⇒ Object

Lookups an item



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# File 'lib/volt/utils/generic_counting_pool.rb', line 25

def lookup(*args, &block)
  item = super(*args, &block)

  return item[1]
end

#remove(*args) ⇒ Object 



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# File 'lib/volt/utils/generic_counting_pool.rb', line 35

def remove(*args)
  item = __lookup(*args)
  item[0] -= 1

  if item[0] == 0
    # Last one using this item has removed it.
    super(*args)
  end
end

#transform_item(item) ⇒ Object 



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# File 'lib/volt/utils/generic_counting_pool.rb', line 31

def transform_item(item)
  [0, item]
end