Throttling Ember Data requests

Question

I’m using Ember Data to interact with a REST API that has a rate limit.

Any suggestions for how to go about throttling Ember Data requests to X requests per second?

Answer 1

First, if you want to do things with all AJAX requests I strongly recommend ember-ajax. This gives you a single point to modify all your AJAX requests. Next about throttling. I suggested ember-concurrency In the comments, so let me elaborate this. ember-concurrency gives you a timeout method, that returns a promise that will resolve after a certain amount of time. This allows easy throtteling:

export default AjaxService.extend({
  ajaxThrottle: task(function * (cb) {
    cb();
    // maxConcurrency with timeout 1000 means at maximum 3 requests per second.
    yield timeout(1000);
  }).maxConcurrency(3).enqueue(),
  async request() {
    await new Promise(cb => ajaxThrottle.perform(cb));
    return this._super(...arguments); // this should make the actual request
  },
});