cometdjs

##A Simple HowTo:

Install the library

npm install --save cometd

Include the library

var cometD = require('cometd').cometD();

Subscribe to a topic

cometD.topic = '/topic/exampleTopic';

Add a eventListener

cometD.addEventListener('/topic/exampleTopic', function (topic, message) {});

Start the execution

cometD.init(
{
token: "A optional Bearer token",
url: 'http://urltoyourservice.com/cometd/26.0',
debug: true
}
);

###Multi Subscription

You have two options for subscribe more than one topic. You can use a wildcard in your topic like this:

cometD.topic = '/topic/*';

If you use this, you can add a eventListener to each channel.

cometD.addEventListener('/topic/topic1', function (topic, message) {});
cometD.addEventListener('/topic/topic2', function (topic, message) {});

Or you can use only one handler function. You can also access the topicName:

function myHandler(theTopicName, message){
console.log(theTopicName);
}

cometD.addEventListener('/topic/topic1', myHandler);
cometD.addEventListener('/topic/topic2', myHandler);

Sometime wildcards are not available. But this isn't a problem. The cometD object isn't a singleton. Each Instance has his own cookie.

var topics = ['topic1', 'topic2'];

function myCometDFunction(topic){
var cometD = require('./cometD.js').cometD();

cometD.topic = '/topic/' + topic;
cometD.init(
{
token: "Bearer Token",
url: 'http://aserviceurl.com/cometd/26.0',
debug: true
}
);

cometD.addEventListener('/topic/' + topic, function(topicName, message){});
}

for (var i = 0; i < topics.length; i++) {
myCometDFunction(topics[i]);
}