Simple spike of an incremental backoff for Ember.js

gistfile1.js

// **EDIT**: I've created an ember-cli addon for this here: 
//
//   https://github.com/GavinJoyce/ember-backoff



var delay = function(milliseconds) {
  milliseconds = milliseconds || 2000;
  return new Em.RSVP.Promise(function(resolve) {
    Em.run.later(this, function() {
      resolve();
    }, milliseconds);
  });
};


var retryWithBackoff = function(callback, retryCountBeforeFailure, waitInMilliseconds) {
  if(Em.empty(retryCountBeforeFailure)) {
    retryCountBeforeFailure = 5;
  }
  waitInMilliseconds = waitInMilliseconds || 250;

  return callback().catch(function(reason) {
    if (retryCountBeforeFailure-- > 1) {
      waitInMilliseconds = waitInMilliseconds * 2;

      return delay(waitInMilliseconds).then(function() {
        return retryWithBackoff(callback, retryCountBeforeFailure, waitInMilliseconds);
      });
    }

    throw reason;
  });
}

import Em from 'ember';

var delay = function(milliseconds) {
  milliseconds = milliseconds || 2000;
  return new Em.RSVP.Promise(function(resolve) {
    Em.run.later(this, function() {
      resolve();
    }, milliseconds);
  });
};


var retryWithBackoff = function(callback, retryCountBeforeFailure, waitInMilliseconds) {
  console.log('retryWithBackoff');
  if(Em.empty(retryCountBeforeFailure)) {
    retryCountBeforeFailure = 5;
  }
  waitInMilliseconds = waitInMilliseconds || 250;

  return callback().catch(function(reason) {
    if (retryCountBeforeFailure-- > 1) {
      waitInMilliseconds = waitInMilliseconds * 2;

      return delay(waitInMilliseconds).then(function() {
        return retryWithBackoff(callback, retryCountBeforeFailure, waitInMilliseconds);
      });
    }

    throw reason;
  });
};

var withBackoff = function(context, method) {
  var args = Array.prototype.slice.call(arguments, 2);
  var callback = context[method];
  return retryWithBackoff(function() {
    return callback.apply(context, args);
  });
};

export default Em.Route.extend({
  queryParams: {
    page: {
      refreshModel: true
    }
  },
  model: function(params) {
    return withBackoff(this.store, 'find', 'user', {
      page: params.page
    });
  }
});