Class: ActionView::Resolver::Cache

Inherits:
Object
  • Object
show all
Defined in:
actionview/lib/action_view/template/resolver.rb

Overview

Threadsafe template cache

Defined Under Namespace

Classes: SmallCache

Constant Summary collapse

PARTIAL_BLOCK =

Preallocate all the default blocks for performance/memory consumption reasons

lambda { |cache, partial| cache[partial] = SmallCache.new }
PREFIX_BLOCK = 
lambda { |cache, prefix|  cache[prefix]  = SmallCache.new(&PARTIAL_BLOCK) }
NAME_BLOCK = 
lambda { |cache, name|    cache[name]    = SmallCache.new(&PREFIX_BLOCK) }
KEY_BLOCK = 
lambda { |cache, key|     cache[key]     = SmallCache.new(&NAME_BLOCK) }
NO_TEMPLATES =

Usually a majority of template look ups return nothing, use this canonical preallocated array to save memory

[].freeze

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Cache

Returns a new instance of Cache.



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# File 'actionview/lib/action_view/template/resolver.rb', line 55

def initialize
  @data = SmallCache.new(&KEY_BLOCK)
  @query_cache = SmallCache.new
end

Instance Method Details

#cache(key, name, prefix, partial, locals) ⇒ Object

Cache the templates returned by the block



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# File 'actionview/lib/action_view/template/resolver.rb', line 65

def cache(key, name, prefix, partial, locals)
  @data[key][name][prefix][partial][locals] ||= canonical_no_templates(yield)
end

#cache_query(query) ⇒ Object

:nodoc:



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# File 'actionview/lib/action_view/template/resolver.rb', line 69

def cache_query(query) # :nodoc:
  @query_cache[query] ||= canonical_no_templates(yield)
end

#clear ⇒ Object 



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# File 'actionview/lib/action_view/template/resolver.rb', line 73

def clear
  @data.clear
  @query_cache.clear
end

#inspect ⇒ Object 



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# File 'actionview/lib/action_view/template/resolver.rb', line 60

def inspect
  "#{to_s[0..-2]} keys=#{@data.size} queries=#{@query_cache.size}>"
end

#size ⇒ Object

Get the cache size. Do not call this method. This method is not guaranteed to be here ever.



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# File 'actionview/lib/action_view/template/resolver.rb', line 80

def size # :nodoc:
  size = 0
  @data.each_value do |v1|
    v1.each_value do |v2|
      v2.each_value do |v3|
        v3.each_value do |v4|
          size += v4.size
        end
      end
    end
  end

  size + @query_cache.size
end