Module: ModelCache

Defined in:
lib/model-cache.rb

Defined Under Namespace

Modules: ClassMethods

Constant Summary collapse

DEFAULT_TIME = 
12*3600
NIL_OBJECT = 
:__i_have_no_idea_how_to_do_this_without_an_ugly_symbol

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.cache(ckey, time = DEFAULT_TIME, &block) ⇒ Object 



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# File 'lib/model-cache.rb', line 16

def self.cache(ckey, time = DEFAULT_TIME, &block)
 ckey = ckey.hash.to_s(16)
 cache_hit = false
  if CACHE.class.name == 'Memcached'
    begin
      result = CACHE.get(ckey.hash.to_s)
      cache_hit = true
    rescue Memcached::NotFound => e
    end
  elsif CACHE.class.name == 'MemCache' or CACHE.class.name == 'Dalli::Client'
    result = CACHE.get(ckey.hash.to_s)
    if result
      cache_hit = true
    end
    if result == NIL_OBJECT
      result = nil
    end
  else
    raise "CACHE object not configured #{CACHE.inspect}!"
  end
  unless cache_hit
    result = block.call
    if CACHE.class.name == 'MemCache' or CACHE.class.name == 'Dalli::Client'
      if result
        CACHE.set(ckey.hash.to_s, result, time)
      else
        CACHE.set(ckey.hash.to_s, NIL_OBJECT, time)
      end
    elsif CACHE.class.name == 'Memcached'
      CACHE.set(ckey.hash.to_s, result, time)
    else
      raise "CACHE object not configured #{CACHE.inspect}!"
    end
    result
  end
  result
end

.included(klass) ⇒ Object 



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# File 'lib/model-cache.rb', line 8

def self.included(klass)
 klass.extend ClassMethods
end

Instance Method Details

#cache(key, time = DEFAULT_TIME, &block) ⇒ Object 



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# File 'lib/model-cache.rb', line 12

def cache(key, time = DEFAULT_TIME, &block)
 ModelCache::cache([self.cache_key, key], time, &block)
end