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Viewing changes to vendor/rails/activesupport/lib/active_support/cache/file_store.rb

  • Committer: Michael Forrest
  • Date: 2010-10-15 16:28:50 UTC
  • Revision ID: michael.forrest@canonical.com-20101015162850-tj2vchanv0kr0dun
refroze gems

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vendor/rails/activesupport/lib/active_support/cache/file_store.rb
 
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module ActiveSupport
 
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  module Cache
 
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    # A cache store implementation which stores everything on the filesystem.
 
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    class FileStore < Store
 
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      attr_reader :cache_path
 
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      def initialize(cache_path)
 
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        @cache_path = cache_path
 
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      end
 
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      def read(name, options = nil)
 
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        super
 
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        File.open(real_file_path(name), 'rb') { |f| Marshal.load(f) } rescue nil
 
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      end
 
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      def write(name, value, options = nil)
 
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        super
 
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        ensure_cache_path(File.dirname(real_file_path(name)))
 
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        File.atomic_write(real_file_path(name), cache_path) { |f| Marshal.dump(value, f) }
 
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        value
 
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      rescue => e
 
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        logger.error "Couldn't create cache directory: #{name} (#{e.message})" if logger
 
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      end
 
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      def delete(name, options = nil)
 
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        super
 
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        File.delete(real_file_path(name))
 
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      rescue SystemCallError => e
 
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        # If there's no cache, then there's nothing to complain about
 
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      end
 
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      def delete_matched(matcher, options = nil)
 
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        super
 
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        search_dir(@cache_path) do |f|
 
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          if f =~ matcher
 
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            begin
 
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              File.delete(f)
 
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            rescue SystemCallError => e
 
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              # If there's no cache, then there's nothing to complain about
 
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            end
 
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          end
 
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        end
 
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      end
 
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      def exist?(name, options = nil)
 
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        super
 
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        File.exist?(real_file_path(name))
 
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      end
 
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      private
 
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        def real_file_path(name)
 
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          '%s/%s.cache' % [@cache_path, name.gsub('?', '.').gsub(':', '.')]
 
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        end
 
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        def ensure_cache_path(path)
 
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          FileUtils.makedirs(path) unless File.exist?(path)
 
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        end
 
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        def search_dir(dir, &callback)
 
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          Dir.foreach(dir) do |d|
 
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            next if d == "." || d == ".."
 
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            name = File.join(dir, d)
 
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            if File.directory?(name)
 
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              search_dir(name, &callback)
 
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            else
 
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              callback.call name
 
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            end
 
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          end
 
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        end
 
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    end
 
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  end
 
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end