gecko/browser/experiments/ExperimentsService.js

62 lines
1.9 KiB
JavaScript

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const {interfaces: Ci, utils: Cu} = Components;
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Services.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "Experiments",
"resource:///modules/experiments/Experiments.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "OS",
"resource://gre/modules/osfile.jsm");
const PREF_EXPERIMENTS_ENABLED = "experiments.enabled";
const PREF_HEALTHREPORT_ENABLED = "datareporting.healthreport.service.enabled";
const PREF_TELEMETRY_ENABLED = "toolkit.telemetry.enabled";
XPCOMUtils.defineLazyGetter(
this, "gExperimentsEnabled", () => {
try {
let prefs = Services.prefs;
return prefs.getBoolPref(PREF_EXPERIMENTS_ENABLED) &&
prefs.getBoolPref(PREF_TELEMETRY_ENABLED) &&
prefs.getBoolPref(PREF_HEALTHREPORT_ENABLED);
} catch (e) {
return false;
}
});
function ExperimentsService() {
}
ExperimentsService.prototype = {
classID: Components.ID("{f7800463-3b97-47f9-9341-b7617e6d8d49}"),
QueryInterface: XPCOMUtils.generateQI([Ci.nsITimerCallback, Ci.nsIObserver]),
notify: function (timer) {
if (!gExperimentsEnabled) {
return;
}
if (OS.Constants.Path.profileDir === undefined) {
throw Error("Update timer fired before profile was initialized?");
}
Experiments.instance().updateManifest();
},
observe: function (subject, topic, data) {
switch (topic) {
case "profile-after-change":
if (gExperimentsEnabled) {
Experiments.instance(); // for side effects
}
break;
}
},
};
this.NSGetFactory = XPCOMUtils.generateNSGetFactory([ExperimentsService]);