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Contents
require 'json'
module Marvin
# Implements a simple datastore interface, designed to make
# it easy to develop handlers which have persistent data.
class DataStore
cattr_accessor :logger, :registered_stores
self.logger = Marvin::Logger.logger
self.registered_stores = {}
# Returns the path to the data store relative to this file.
# Used when loading / dumping the data.
def self.datastore_location
path = Marvin::Settings[:datastore_location] ? Marvin::Settings.datastore_location : "tmp/datastore.json"
return Marvin::Settings.root / path
end
# Dump the current data store contents to file.
def self.dump!
File.open(self.datastore_location, "w+") do |f|
f.write self.registered_stores.to_json
end
end
# Load the current data store contents from file.
def self.load!
results = {}
if File.exists?(self.datastore_location)
begin
json = JSON.load(File.read(self.datastore_location))
results = json if json.is_a?(Hash)
rescue JSON::ParserError
end
end
self.registered_stores = results
end
# For each individual datastore.
attr_accessor :name
def initialize(name)
self.name = name.to_s
self.registered_stores ||= {}
self.registered_stores[self.name] ||= {}
end
def [](key)
((self.registered_stores||={})[self.name]||={})[key.to_s]
end
def []=(key,value)
self.registered_stores[self.name][key.to_s] = value
end
def method_missing(name, *args, &blk)
if name.to_s =~ /^(.*)=$/i
self[$1.to_s] = args.first
elsif self.registered_stores[self.name].has_key?(name.to_s)
return self.registered_stores[self.name][name.to_s]
else
super(name, *args, &blk)
end
end
def to_hash
self.registered_stores[self.name]
end
end
end
Version data entries
16 entries across 16 versions & 2 rubygems