Module: Lacquer::CacheUtils

Defined in:
lib/lacquer/cache_utils.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/lacquer/cache_utils.rb', line 3

def self.included(base)
  base.class_eval do
    attr_reader :cache_ttl

    before_filter :set_default_cache_ttl
    after_filter :send_cache_control_headers
  end
end

Instance Method Details

#clear_cache_for(*paths) ⇒ Object

Sends url.purge command to varnish to clear cache.

clear_cache_for(root_path, blog_posts_path, ‘/other/content/*’)



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# File 'lib/lacquer/cache_utils.rb', line 26

def clear_cache_for(*paths)
  paths.each do |path|
    case Lacquer.configuration.job_backend
    when :delayed_job
      require 'lacquer/delayed_job_job'
      Delayed::Job.enqueue(Lacquer::DelayedJobJob.new('url.purge ' << path))
    when :resque
      require 'lacquer/resque_job'
      Resque.enqueue(Lacquer::ResqueJob, 'url.purge ' << path)
    when :none
      Varnish.new.purge('url.purge ' << path)
    end
  end
end

#send_cache_control_headers ⇒ Object

Sends cache control headers with page. These are the headers that varnish responds to to set cache properly.



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# File 'lib/lacquer/cache_utils.rb', line 44

def send_cache_control_headers
  if Lacquer.configuration.enable_cache && @cache_ttl && @cache_ttl != 0
    expires_in(@cache_ttl, :public => true, :private => false)
  end
end

#set_cache_ttl(ttl) ⇒ Object

Instance variable for the action ttl.



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# File 'lib/lacquer/cache_utils.rb', line 13

def set_cache_ttl(ttl)
  @cache_ttl = ttl
end

#set_default_cache_ttl ⇒ Object

Called as a before filter to set default ttl for the entire application.



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# File 'lib/lacquer/cache_utils.rb', line 19

def set_default_cache_ttl
  set_cache_ttl(Lacquer.configuration.default_ttl)
end