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Contents
# Copyright (c) 2008 Michael Fellinger m.fellinger@gmail.com
# All files in this distribution are subject to the terms of the Ruby license.
require 'yaml/store'
module Ramaze
# Namespace for Stores in Ramaze
module Store
# A simple wrapper around YAML::Store
class Default
include Enumerable
attr_accessor :db
# create a new store with a filename
def initialize filename = 'db.yaml'
FileUtils.touch(filename)
@db = YAML::Store.new(filename)
end
# yield a block in a transaction, identical to #db.transaction{}
def transaction
@db.transaction do
yield
end
end
# pass on all methods inside a transaction
def method_missing(meth, *args, &block)
read_only = (meth == :[])
@db.transaction(read_only) do
@db.send(meth, *args, &block)
end
end
# the actual content of the store in YAML format
def to_yaml
dump(:x)
end
# loads the #to_yaml
def original
YAML.load(to_yaml)
end
# available keys of the store
def keys
(original || {}).keys
end
# is the Store empty? (no keys)
def empty?
keys.empty?
end
# nondestructive merge on #original
def merge hash = {}
original.merge(hash)
end
# destructive #merge
def merge! hash = {}
hash.each do |key, value|
transaction do
@db[key] = value
end
end
original
end
# delete all entries
def clear
keys.each do |key|
delete key
end
end
# number of #keys
def size
keys.size
end
# Iterate over #original and pass the key and value to a block.
def each
original.each do |key, value|
yield key, value
end
end
end
end
end
Version data entries
21 entries across 21 versions & 5 rubygems