Module: Merb::Cache::CacheMixin

Included in:
Merb::Controller
Defined in:
lib/merb-cache/merb_ext/controller.rb

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/merb-cache/merb_ext/controller.rb', line 2

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

Instance Method Details

#_cache_after(conditions = {}) ⇒ Object 



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# File 'lib/merb-cache/merb_ext/controller.rb', line 114

def _cache_after(conditions = {})
  if @_skip_cache.nil? && Merb::Cache[_lookup_store(conditions)].write(self, nil, *_parameters_and_conditions(conditions))
    @_cache_write = true
  end
end

#_cache_before(conditions = {}) ⇒ Object 



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# File 'lib/merb-cache/merb_ext/controller.rb', line 105

def _cache_before(conditions = {})
  unless @_force_cache
    if @_skip_cache.nil? && data = Merb::Cache[_lookup_store(conditions)].read(self, _parameters_and_conditions(conditions).first)
      throw(:halt, data)
      @_cache_hit = true
    end
  end
end

#_eager_cache_after(klass, action, conditions = {}, blk = nil) ⇒ Object 



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# File 'lib/merb-cache/merb_ext/controller.rb', line 120

def _eager_cache_after(klass, action, conditions = {}, blk = nil)
  if @_skip_cache.nil?
    run_later do
      controller = klass.eager_dispatch(action, request.params.dup, request.env.dup, blk)

      Merb::Cache[controller._lookup_store(conditions)].write(controller, nil, *controller._parameters_and_conditions(conditions))
    end
  end
end

#_lookup_store(conditions = {}) ⇒ Object 



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# File 'lib/merb-cache/merb_ext/controller.rb', line 156

def _lookup_store(conditions = {})
  conditions[:store] || conditions[:stores] || default_cache_store
end

#_parameters_and_conditions(conditions) ⇒ Object

ugly, please make me purdy’er



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# File 'lib/merb-cache/merb_ext/controller.rb', line 166

def _parameters_and_conditions(conditions)
  parameters = {}

  if self.class.respond_to? :action_argument_list
    arguments, defaults = self.class.action_argument_list[action_name]
    arguments.inject(parameters) do |parameters, arg|
      if defaults.include?(arg.first)
        parameters[arg.first] = self.params[arg.first] || arg.last
      else
        parameters[arg.first] = self.params[arg.first]
      end
      parameters
    end
  end

  case conditions[:params]
  when Symbol
    parameters[conditions[:params]] = self.params[conditions[:params]]
  when Array
    conditions[:params].each do |param|
      parameters[param] = self.params[param]
    end
  end

  return parameters, conditions.except(:params, :store, :stores)
end

#_set_skip_cache ⇒ Object 



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# File 'lib/merb-cache/merb_ext/controller.rb', line 144

def _set_skip_cache
  @_skip_cache = true
end

#default_cache_store ⇒ Object

Overwrite this in your controller to change the default store for a given controller



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# File 'lib/merb-cache/merb_ext/controller.rb', line 161

def default_cache_store
  Merb::Cache.default_store_name
end

#eager_cache(action, conditions = {}, params = request.params.dup, env = request.env.dup, &blk) ⇒ Object 



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# File 'lib/merb-cache/merb_ext/controller.rb', line 130

def eager_cache(action, conditions = {}, params = request.params.dup, env = request.env.dup, &blk)
  unless @_skip_cache
    if action.is_a?(Array)
      klass, action = *action
    else
      klass = self.class
    end

    run_later do
      controller = klass.eager_dispatch(action, params.dup, env.dup, blk)
    end
  end
end

#fetch_fragment(opts = {}, conditions = {}, &proc) ⇒ Object 



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# File 'lib/merb-cache/merb_ext/controller.rb', line 93

def fetch_fragment(opts = {}, conditions = {}, &proc)
  
  if opts[:cache_key].blank?
    file, line = proc.to_s.scan(%r{^#<Proc:0x\w+@(.+):(\d+)>$}).first
    fragment_key = "#{file}[#{line}]"
  else
    fragment_key = opts.delete(:cache_key)
  end
    
  concat(Merb::Cache[_lookup_store(conditions)].fetch(fragment_key, opts, conditions) { capture(&proc) }, proc.binding)
end

#fetch_partial(template, opts = {}, conditions = {}) ⇒ Object 



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# File 'lib/merb-cache/merb_ext/controller.rb', line 77

def fetch_partial(template, opts={}, conditions = {})
  template_id = template.to_s
  if template_id =~ %r{^/}
    template_path = File.dirname(template_id) / "_#{File.basename(template_id)}"
  else
    kontroller = (m = template_id.match(/.*(?=\/)/)) ? m[0] : controller_name
    template_id = "_#{File.basename(template_id)}"
  end

  unused, template_key = _template_for(template_id, opts.delete(:format) || content_type, kontroller, template_path)

  fetch_proc = lambda { partial(template, opts) }

  concat(Merb::Cache[_lookup_store(conditions)].fetch(template_key, opts, conditions, &fetch_proc), fetch_proc.binding)
end

#force_cache! ⇒ Object 



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# File 'lib/merb-cache/merb_ext/controller.rb', line 152

def force_cache!
  @_force_cache = true
end

#skip_cache! ⇒ Object 



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# File 'lib/merb-cache/merb_ext/controller.rb', line 148

def skip_cache!
  _set_skip_cache
end