dojo_app/js/library/dojo/topic.js

define(["./Evented"], function(Evented){

	// module:
	//		dojo/topic

	var hub = new Evented;
	return {
		// summary:
		//		Pubsub hub.
		// example:
		//		| 	topic.subscribe("some/topic", function(event){
		//		|	... do something with event
		//		|	});
		//		|	topic.publish("some/topic", {name:"some event", ...});

		publish: function(topic, event){
			// summary:
			//		Publishes a message to a topic on the pub/sub hub. All arguments after
			//		the first will be passed to the subscribers, so any number of arguments
			//		can be provided (not just event).
			// topic: String
			//		The name of the topic to publish to
			// event: Object
			//		An event to distribute to the topic listeners
			return hub.emit.apply(hub, arguments);
		},

		subscribe: function(topic, listener){
			// summary:
			//		Subscribes to a topic on the pub/sub hub
			// topic: String
			//		The topic to subscribe to
			// listener: Function
			//		A function to call when a message is published to the given topic
			return hub.on.apply(hub, arguments);
		}
	};
});