Sha256: 037cf9c8f813fd1ad90e29da76fbac6f3558b514fd5c50df78cadb5c7c105f8e
Contents?: true
Size: 1.82 KB
Versions: 7
Compression:
Stored size: 1.82 KB
Contents
module Gemirro
##
# The Cache class contains all method to store marshal informations
# into files.
#
# @!attribute [r] root_path
# @return [String]
#
class Cache
attr_reader :root_path
##
# Initialize cache root path
#
# @param [String] path
#
def initialize(path)
@root_path = path
create_root_path
end
##
# Create root path
#
def create_root_path
FileUtils.mkdir_p(@root_path)
end
##
# Flush cache directory
#
def flush
FileUtils.rm_rf(@root_path)
create_root_path
end
##
# Flush key
#
# @param [String] key
#
def flush_key(key)
path = key_path(key2hash(key))
FileUtils.rm_f(path)
end
##
# Cache data
#
# @param [String] key
#
# @return [Mixed]
#
def cache(key)
key_hash = key2hash(key)
read(key_hash) || (write(key_hash, yield) if block_given?)
end
private
##
# Convert key to hash
#
# @param [String] key
#
# @return [String]
#
def key2hash(key)
Digest::MD5.hexdigest(key)
end
##
# Path from key hash
#
# @param [String] key_hash
#
# @return [String]
#
def key_path(key_hash)
File.join(@root_path, key_hash)
end
##
# Read cache
#
# @param [String] key_hash
#
# @return [Mixed]
#
def read(key_hash)
path = key_path(key_hash)
Marshal.load(File.open(path)) if File.exist?(path)
end
##
# write cache
#
# @param [String] key_hash
# @param [Mixed] value
#
# @return [Mixed]
#
def write(key_hash, value)
return value if value.nil? || value.empty?
File.open(key_path(key_hash), 'wb') do |f|
Marshal.dump(value, f)
end
value
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems