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.
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DIR_FORMATTER | = | "%03X" |
FILENAME_MAX_SIZE | = | 228 |
EXCLUDED_DIRS | = | ['.', '..'].freeze |
[R] | cache_path |
Preemptively iterates through all stored keys and removes the ones which have expired.
# File activesupport/lib/active_support/cache/file_store.rb, line 34 def cleanup(options = nil) options = merged_options(options) search_dir(cache_path) do |fname| key = file_path_key(fname) entry = read_entry(key, options) delete_entry(key, options) if entry && entry.expired? end end
Deletes all items from the cache. In this case it deletes all the entries
in the specified file store directory except for .gitkeep. Be careful which
directory is specified in your config file when using
FileStore
because everything in that directory will be
deleted.
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 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(key, options) if key.match(matcher) end end end
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 86 def delete_entry(key, options) file_name = key_file_path(key) if File.exist?(file_name) begin File.delete(file_name) delete_empty_directories(File.dirname(file_name)) true rescue => e # Just in case the error was caused by another process deleting the file first. raise e if File.exist?(file_name) false end end end
# File activesupport/lib/active_support/cache/file_store.rb, line 68 def read_entry(key, options) file_name = key_file_path(key) if File.exist?(file_name) File.open(file_name) { |f| Marshal.load(f) } end rescue => e logger.error("FileStoreError (#{e}): #{e.message}") if logger nil end
# File activesupport/lib/active_support/cache/file_store.rb, line 78 def write_entry(key, entry, options) file_name = key_file_path(key) return false if options[:unless_exist] && File.exist?(file_name) ensure_cache_path(File.dirname(file_name)) File.atomic_write(file_name, cache_path) {|f| Marshal.dump(entry, f)} true end