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Contents
class Settings
# Base class for our value stores. Derived classes manage loading and saving
# values in the value hash.
class ValueStore
def initialize(root, options = {})
@root = root
@options = options
@loaded_on = nil
@reload = options.delete(:reload) || false
@values = {}
end
def need_reload?
# Always reload at first chance, ie LOAD, duh
return true if @loaded_on.nil?
# Do the right thing
case @reload
when true then
# Always reload each time #settings creates a new cursor
true
when false then
# Never reload
false
when Proc then
# Custom reload handler, reload on returning true
@reload.call === true
when Fixnum then
# Reload after N seconds
Time.now > @loaded_on + @reload.to_i
when String then
# Reload if file is modified
mod_time = File.mtime(@reload) rescue nil
mod_time.nil? || @loaded_on < mod_time
else
# Non-standard reload setting, must be handled in kids
nil
end
end
def reload_if_needed
load if need_reload?
end
def load
@loaded_on = Time.now
@values = {}
end
def save
# No saving for me, thanks
return if read_only?
# Update our timestamp on our cache reload file, if any
if @reload.is_a?(String)
FileUtils.touch(@reload)
end
# Remember when we were loaded for future use
@loaded_on = Time.now
end
def has_value?(key)
@values.has_key?(key)
end
def get_value(key)
@values[key]
end
def set_value(key, value)
@values[key] = value
end
def read_only?
false
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems