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Class: ActiveRecord::ConnectionAdapters::QueryCache::Store

Do not use. This class is for internal use only.
Relationships & Source Files
Inherits: Object
Defined in: activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new(version, max_size) ⇒ Store

[ GitHub ] 

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb', line 39



def initialize(version, max_size)
  @version = version
  @current_version = version.value
  @map = {}
  @max_size = max_size
  @enabled = false
  @dirties = true
end


  







Instance Attribute Details



  

    #dirties?   (rw)
  



  

    

Alias for #dirties.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb', line 37



alias_method :dirties?, :dirties


  








  

    #empty?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb', line 53



def empty?
  check_version
  @map.empty?
end


  








  

    #enabled?   (rw)
  



  

    

Alias for #enabled.


  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb', line 36



alias_method :enabled?, :enabled


  







Instance Method Details



  

    #[](key)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb', line 58



def [](key)
  check_version
  return unless @enabled

  if entry = @map.delete(key)
    @map[key] = entry
  end
end


  








  

    #check_version   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb', line 89



def check_version
  if @current_version != @version.value
    @map.clear
    @current_version = @version.value
  end
end


  








  

    #clear  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb', line 83



def clear
  @map.clear
  self
end


  








  

    #compute_if_absent(key)  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb', line 67



def compute_if_absent(key)
  check_version

  return yield unless @enabled

  if entry = @map.delete(key)
    return @map[key] = entry
  end

  if @max_size && @map.size >= @max_size
    @map.shift # evict the oldest entry
  end

  @map[key] ||= yield
end


  








  

    #dirties   (rw)
    Also known as: #dirties?
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb', line 35



attr_accessor :enabled, :dirties


  








  

    #enabled   (rw)
    Also known as: #enabled?
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb', line 35



attr_accessor :enabled, :dirties


  








  

    #size  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb', line 48



def size
  check_version
  @map.size
end