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File Cache Store

A cache store implementation which stores everything on the filesystem.

Methods
C
D
I
N
S

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: show | on GitHub 

# File rails/activesupport/lib/active_support/cache/file_store.rb, line 20
def initialize(cache_path, **options)
  super(options)
  @cache_path = cache_path.to_s
end

supports_cache_versioning?()

Advertise cache versioning support.

Source: show | on GitHub 

# File rails/activesupport/lib/active_support/cache/file_store.rb, line 26
def self.supports_cache_versioning?
  true
end

Instance Public methods

cleanup(options = nil)

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

Source: show | on GitHub 

# File rails/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

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: show | on GitHub 

# File rails/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

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

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: show | on GitHub 

# File rails/activesupport/lib/active_support/cache/file_store.rb, line 75
def decrement(name, amount = 1, options = nil)
  modify_value(name, -amount, options)
end

delete_matched(matcher, options = nil)

Source: show | on GitHub 

# File rails/activesupport/lib/active_support/cache/file_store.rb, line 79
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)

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: show | on GitHub 

# File rails/activesupport/lib/active_support/cache/file_store.rb, line 60
def increment(name, amount = 1, options = nil)
  modify_value(name, amount, options)
end