bubpubsub

bubPubSub

bubPubSub (VisualWeb's PubSub) is a publish/subscribe system for communication between objects/modules of your code. It's rather similar to common pubSub systems, but closer related to the event system of nodeJS or the browser. USP's are

• (optional) BUBBLING along a topic-tree

• (optional) PERSISTENCE of publications for later retrieval/reference

It is developed, used and sponsored by myLinkCloud (http://www.mylinkcloud.com), meinUnterricht (http://www.meinUnterricht.de), K.lab (http://www.klab-berlin.com), and ViSERiON (http://www.viserion.com) .

compatibility

bubPubSub works on both ends, the client and the server (nodeJS).

Installation with nodeJS

  $ npm install bubpubsub

Test (server-side)

cd to node_modules/bubpubsub
make

VERSION HISTORY:

- v0.8.7 22.11.12
	- introduced silent option as a per-publication flag to avoice console logging
- v0.8.6 22.11.12
	- bugFix
- v0.8.6 22.11.12
	- bugFix
- v0.8.5 19.11.12
	- bugFixes ..
- v0.8.4 15.11.12
	- bugFixes ..
	- old parameters for subscribe will be deprecated announcement
- v0.8.3 15.11.12
	- introduced autoUnsubscribe to subscribe options ! 
	- optional try-catch around subscribers
	- scope setting for subscribers
	- introduced limits for error and publication logs to 10000 items in order to limit memory usage.
- v0.82 28.07.2012
	- bugfix in chain default and if check. 
- v0.81 27.07.12
	- unsubscribe updated to do a better job of namespace (& memory) cleanup
- v0.80 22.06.12
	- added the option to do chaining. this needs quite some field-testing ;)
	- added chainDelay config setting for chained publications to allow breathing-time for the cpu 
- v0.71 15.06.12
	- made the code a bit more beautiful
	- introduced forceUniqueSubscriber to allow replacing subscriber methods by Id
	- replaced isFunction method by typeof test 
	- removed randomString method
	- switched from bad style == to good style === operators... 
	- changed licence
- v0.70 21.03.12
	- renamed
	- fused client (jQuery) and server (nodeJS) versions
	- series of bugfixes
- v0.60	29.10.11			
	- removed dependencies from jQuery. 
	- enabled using the same file for client- and nodeJS server-side implementation
	- added the reply function explicitely

Usage

there is a detailed description of all functions in the source-code ... 

examples (more in the source JS)

		// SUBSCRIPTION TO a deep branch WITHOUT PICKING UP BUBBLES 
 		var myEuropeSubscription = aBubPubSub.subscribe(
 			'/politics/europe', 
 			function(data, currentBranch, publisher, replyCall, subscriptionIdObject) { 
 				console.log('original publication branch: ' + data.originalTopic);  
				console.log('i subscribed to : ' + currentBranch);  
 				replyCall('I am [' + myEuropeSubscription.id + '] and I am only interested in european politics');
 			}, 
 			{ getBubbles: false } 
 			'myEuropeSubscriber'
 		);
	   
	   // SUBSCRIPTION TO ROOT WITH BUBBLING
	    var myRootSubscription = aBubPubSub.subscribe(
 			'/', 
 			function(data, currentBranch, publisher, replyCall, subscriptionIdObject) { 
 				console.log('original publication branch: ' + data.originalTopic);  
				console.log('i subscribed to : ' + currentBranch);  
 				replyCall('I am [' + myRootSubscription.id + '] and I pick up any publication');
 			}, 
 			{ getBubbles: true } 
 			'myRootSubscriber'
 		);

   		// PUBLISH WITH PERSISTANCE AND BUBBLING
		aBubPubSub.publish(
 			'/politics/europe/germany/pipa', 
 			{ 
 				content: 'this is wonderfool',  
			},
			{ 
				bubble:true, 
				persist:true 
			}, 
			'myTestPublisher1',
			function(replyCallParametersOfYourChoice) {
				console.dir(replyCallParametersOfYourChoice);
				return true;
			}
 		);
		
		// PUBLISH WITH PERSISTANCE AND BUBBLING
		aBubPubSub.publish(
 			'/politics/europe/germany/pipa/legislation', 
 			{ 
 				content: 'this can not be picked up by the nonBubbler or the persistence check (below)',  
			},
			{ 
				bubble:true, 
				persist:false 
			}, 
			'myTestPublisher2',
			function(replyCallParametersOfYourChoice) {
				console.dir(replyCallParametersOfYourChoice);
				return true;
			}
 		);
		
		
		// PERSISTANCE
		var persistentPublicationObjectArrayOnPolitics = aBubPubSub.wasPublishedOnTopic('/politics', true);
	
		// UNSUBSCRIBE
		aBubPubSub.unsubscribe(myRootSubscription);