Using Other Data Sources for cubism.js

Question

I like the user experience of cubism, and would like to use this on top of a backend we have.

I\'ve read the API doc\'s and some of the code, most of this seems to

Answer 1

Cubism takes care of initialization and update for you: the initial request is the full visible window (start to stop, typically 1,440 data points), while subsequent requests are only for a few most recent metrics (7 data points).

Take a look at context.metric for how to implement a new data source. The simplest possible implementation is like this:

var foo = context.metric(function(start, stop, step, callback) {
  d3.json("/data", function(data) {
    if (!data) return callback(new Error("unable to load data"));
    callback(null, data);
  });
});

You would extend this to change the "/data" URL as appropriate, passing in the start, stop and step times, and whatever else you want to use to identify a metric. For example, both Cube and Graphite use a metric expression as an additional query parameter.