| Current Path : /usr/share/ruby/vendor_ruby/puppet/util/watcher/ |
Linux gator3171.hostgator.com 4.19.286-203.ELK.el7.x86_64 #1 SMP Wed Jun 14 04:33:55 CDT 2023 x86_64 |
| Current File : //usr/share/ruby/vendor_ruby/puppet/util/watcher/change_watcher.rb |
# Watches for changes over time. It only re-examines the values when it is requested to update readings.
# @api private
class Puppet::Util::Watcher::ChangeWatcher
def self.watch(reader)
Puppet::Util::Watcher::ChangeWatcher.new(nil, nil, reader).next_reading
end
def initialize(previous, current, value_reader)
@previous = previous
@current = current
@value_reader = value_reader
end
def changed?
if uncertain?
false
else
@previous != @current
end
end
def uncertain?
@previous.nil? || @current.nil?
end
def change_current_reading_to(new_value)
Puppet::Util::Watcher::ChangeWatcher.new(@current, new_value, @value_reader)
end
def next_reading
change_current_reading_to(@value_reader.call)
end
end