gistfile1.txt

	var events = [
	    { name: 'submit',  from: 'pending',  to: 'processing' },
	    { name: 'update', from: 'processing', to: 'processing'  },
	    { name: 'finish', from: 'processing', to: 'finished'  },
	    { name: 'fail', from: '*', to: 'failed'  }
	];

	var callbacks = {
		onsubmit: function(event, from, to, obj) {
			log.info("submit: " + obj.title);
			CollectionA.update(obj._id, {$set: {
				...
				'state': to
			}});
		},
		onfinish: function(event, from, to, obj) {
			log.info("finish: " + obj.title);
			CollectionA.update(obj._id, {$set: {
				...
				'state': to
			}});
			//can start another state machine too
			CollectionB.update({objId:obj._id},{$set:{
				'state':'pending'
			}});
			}
		},
		onfail: function(event, from, to, obj, error) {
			log.trace(error, "fail: " + obj.title + " - " + error);
			Collection.update(video._id, {$set: {
				'error': error,
				'state': to
			}});
		}
	};
	
	//init the state machine
	var obj = CollecitonA.findOne();
	var stateMachine = StateMachine.create({
			initial: obj.state,
			events: events,
			callbacks: callbacks
		});
		
	//using
	if(err)
		stateMachine.fail(obj, err);
	else
		stateMachine.submit(obj);
		
	stateMachine.finish(obj);