Class: ProstoCache::ProstoModelCache

Inherits:
Object
  • Object
show all
Defined in:
lib/prosto_cache/prosto_model_cache.rb

Overview

cache itself, contains pretty much all the logic

Constant Summary collapse

MAX_CACHE_LIFE =

seconds

60

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model_class, accessor_keys, sort_keys) ⇒ ProstoModelCache

Returns a new instance of ProstoModelCache.

Raises:

  • (ArgumentError) 


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# File 'lib/prosto_cache/prosto_model_cache.rb', line 65

def initialize(model_class, accessor_keys, sort_keys)
  raise ArgumentError, "No model class provided" unless model_class

  @model_class = model_class
  @accessor_keys = [*(accessor_keys || :name)]
  @sort_keys = sort_keys ? [*(sort_keys)] : @accessor_keys
end

Class Method Details

.fail_on_missing_value?(litmus) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/prosto_cache/prosto_model_cache.rb', line 52

def self.fail_on_missing_value?(litmus)
  case litmus
  when Symbol
    true
  when String
    false
  else
    raise ArgumentError, "Unknown type of cache key #{litmus.inspect}"
  end
end

Instance Method Details

#[](*keys) ⇒ Object 



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# File 'lib/prosto_cache/prosto_model_cache.rb', line 77

def [](*keys)
  unless keys.length == accessor_keys.length
    raise BadCacheKeyError, "Cached accessed by #{keys.length} keys, expected #{accessor_keys.length}"
  end

  keys.zip((1..keys.length)).inject(safe_cache) do |memo, (key, index)|
    value = memo[key]
    unless value
      if ProstoModelCache.fail_on_missing_value?(keys.last)
        raise BadCacheKeyError, key
      else
        value = ProstoHash.new unless index == keys.length
      end
    end

    value
  end
end

#invalidate ⇒ Object 



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# File 'lib/prosto_cache/prosto_model_cache.rb', line 73

def invalidate
  self.cache = self.signature = self.validated_at = nil
end

#keys ⇒ Object 



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# File 'lib/prosto_cache/prosto_model_cache.rb', line 96

def keys
  safe_cache.keys
end

#values ⇒ Object 



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# File 'lib/prosto_cache/prosto_model_cache.rb', line 100

def values
  safe_cache.values
end