Module: LockAndCache

Defined in:
lib/lock_and_cache.rb,
lib/lock_and_cache/version.rb

Constant Summary collapse

VERSION = 
"0.0.2"

Instance Method Summary collapse

Instance Method Details

#lock_and_cache(method_id) ⇒ Object

only for instance methods



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# File 'lib/lock_and_cache.rb', line 10

def lock_and_cache(method_id)
  unlocked_method_id = "_lock_and_cache_unlocked_#{method_id}"
  alias_method unlocked_method_id, method_id

  define_method method_id do |*args|
    lock_key = [self.class.name, method_id, HashDigest.digest3([as_cache_key]+args)].join('/')
    ActiveRecord::Base.with_advisory_lock(lock_key) do
      if cache_method_cached?(method_id, args)
        send method_id, *args # which will be the cached version
      else
        send unlocked_method_id
      end
    end
  end

  cache_method method_id
end