File Cache Store

A cache store implementation which stores everything on the filesystem.

Methods

Constants

DIR_FORMATTER = "%03X"
FILENAME_MAX_SIZE = 226
FILEPATH_MAX_SIZE = 900
GITKEEP_FILES = [".gitkeep", ".keep"].freeze

Attributes

[R] cache_path

Class Public methods

new(cache_path, **options)

📝 Source code 
# File activesupport/lib/active_support/cache/file_store.rb, line 20
def initialize(cache_path, **options)
  super(options)
  @cache_path = cache_path.to_s
end
🔎 See on GitHub

supports_cache_versioning?()

Advertise cache versioning support.

📝 Source code 
# File activesupport/lib/active_support/cache/file_store.rb, line 26
def self.supports_cache_versioning?
  true
end
🔎 See on GitHub

Instance Public methods

cleanup(options = nil)

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

📝 Source code 
# File activesupport/lib/active_support/cache/file_store.rb, line 40
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
🔎 See on GitHub

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.

📝 Source code 
# File activesupport/lib/active_support/cache/file_store.rb, line 33
def clear(options = nil)
  root_dirs = (Dir.children(cache_path) - GITKEEP_FILES)
  FileUtils.rm_r(root_dirs.collect { |f| File.join(cache_path, f) })
rescue Errno::ENOENT, Errno::ENOTEMPTY
end
🔎 See on GitHub

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

Decrement a cached integer value. Returns the updated value.

If the key is unset, it will be set to -amount.

cache.decrement("foo") # => -1

To set a specific value, call write:

cache.write("baz", 5)
cache.decrement("baz") # => 4
📝 Source code 
# File activesupport/lib/active_support/cache/file_store.rb, line 80
def decrement(name, amount = 1, **options)
  options = merged_options(options)
  key = normalize_key(name, options)

  instrument(:decrement, key, amount: amount) do
    modify_value(name, -amount, options)
  end
end
🔎 See on GitHub

delete_matched(matcher, options = nil)

📝 Source code 
# File activesupport/lib/active_support/cache/file_store.rb, line 89
def delete_matched(matcher, options = nil)
  options = merged_options(options)
  matcher = key_matcher(matcher, options)

  instrument(:delete_matched, matcher.inspect) do
    search_dir(cache_path) do |path|
      key = file_path_key(path)
      delete_entry(path, **options) if key.match(matcher)
    end
  end
end
🔎 See on GitHub

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

Increment a cached integer value. Returns the updated value.

If the key is unset, it starts from 0:

cache.increment("foo") # => 1
cache.increment("bar", 100) # => 100

To set a specific value, call write:

cache.write("baz", 5)
cache.increment("baz") # => 6
📝 Source code 
# File activesupport/lib/active_support/cache/file_store.rb, line 60
def increment(name, amount = 1, **options)
  options = merged_options(options)
  key = normalize_key(name, options)

  instrument(:increment, key, amount: amount) do
    modify_value(name, amount, options)
  end
end
🔎 See on GitHub