#-- # Copyright (c) 2005-2013, John Mettraux, jmettraux@gmail.com # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # # Made in Japan. #++ module Ruote # # An abstract class for observing the activity of a ruote engine. # # Subclass it and add it as a service to observe certain events. # # require 'ruote/observer' # # class MyLaunchObserver < Ruote::Observer # # def on_msg_launch(msg) # puts "just launched process instance #{msg['wfid']}" # end # end # # dashboard.add_service('launch_observer', MyLaunchObserver) # # # ... # # Simply add a "on_msg_" method for it to intercept the # given messages. # # See Ruote::ProcessObserver for a base class with precisely defined # methods with helpful arguments if you don't want to investigate # "msgs" too much. # class Observer def initialize(context) @context = context end def on_pre_msg(msg) route('pre', msg) end def on_msg(msg) route(nil, msg) end protected def route(time, msg) target = [ 'on', time, 'msg', msg['action'] ].compact.join('_') return unless self.respond_to?(target) send(target, msg) end end end