A cache store implementation which stores everything on the filesystem.

FileStore implements the Strategy::LocalCache strategy which implements an in-memory cache inside of a block.

Methods

Constants

DIR_FORMATTER = "%03X"
 
EXCLUDED_DIRS = [".", ".."].freeze
 
FILENAME_MAX_SIZE = 228
 
FILEPATH_MAX_SIZE = 900
 
GITKEEP_FILES = [".gitkeep", ".keep"].freeze
 

Attributes

[R] cache_path

Class Public methods

new(cache_path, options = nil)

# File activesupport/lib/active_support/cache/file_store.rb, line 24
def initialize(cache_path, options = nil)
  super(options)
  @cache_path = cache_path.to_s
end

Instance Public methods

cleanup(options = nil)

Preemptively iterates through all stored keys and removes the ones which have expired.

# File activesupport/lib/active_support/cache/file_store.rb, line 39
def cleanup(options = nil)
  options = merged_options(options)
  search_dir(cache_path) do |fname|
    entry = read_entry(fname, options)
    delete_entry(fname, options) if entry && entry.expired?
  end
end

clear(options = nil)

Deletes all items from the cache. In this case it deletes all the entries in the specified file store directory except for .keep or .gitkeep. Be careful which directory is specified in your config file when using FileStore because everything in that directory will be deleted.

# File activesupport/lib/active_support/cache/file_store.rb, line 32
def clear(options = nil)
  root_dirs = exclude_from(cache_path, EXCLUDED_DIRS + GITKEEP_FILES)
  FileUtils.rm_r(root_dirs.collect { |f| File.join(cache_path, f) })
rescue Errno::ENOENT
end

decrement(name, amount = 1, options = nil)

Decrements an already existing integer value that is stored in the cache. If the key is not found nothing is done.

# File activesupport/lib/active_support/cache/file_store.rb, line 55
def decrement(name, amount = 1, options = nil)
  modify_value(name, -amount, options)
end

delete_matched(matcher, options = nil)

# File activesupport/lib/active_support/cache/file_store.rb, line 59
def delete_matched(matcher, options = nil)
  options = merged_options(options)
  instrument(:delete_matched, matcher.inspect) do
    matcher = key_matcher(matcher, options)
    search_dir(cache_path) do |path|
      key = file_path_key(path)
      delete_entry(path, options) if key.match(matcher)
    end
  end
end

increment(name, amount = 1, options = nil)

Increments an already existing integer value that is stored in the cache. If the key is not found nothing is done.

# File activesupport/lib/active_support/cache/file_store.rb, line 49
def increment(name, amount = 1, options = nil)
  modify_value(name, amount, options)
end