forked from mirrors/gecko-dev
107 lines
3.6 KiB
JavaScript
107 lines
3.6 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const {interfaces: Ci, utils: Cu} = Components;
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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Cu.import("resource://gre/modules/Services.jsm");
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XPCOMUtils.defineLazyModuleGetter(this, "Experiments",
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"resource:///modules/experiments/Experiments.jsm");
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XPCOMUtils.defineLazyModuleGetter(this, "OS",
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"resource://gre/modules/osfile.jsm");
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XPCOMUtils.defineLazyModuleGetter(this, "CommonUtils",
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"resource://services-common/utils.js");
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XPCOMUtils.defineLazyModuleGetter(this, "TelemetryUtils",
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"resource://gre/modules/TelemetryUtils.jsm");
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const PREF_EXPERIMENTS_ENABLED = "experiments.enabled";
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const PREF_ACTIVE_EXPERIMENT = "experiments.activeExperiment"; // whether we have an active experiment
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const DELAY_INIT_MS = 30 * 1000;
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function ExperimentsService() {
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this._initialized = false;
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this._delayedInitTimer = null;
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}
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ExperimentsService.prototype = {
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classID: Components.ID("{f7800463-3b97-47f9-9341-b7617e6d8d49}"),
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QueryInterface: XPCOMUtils.generateQI([Ci.nsITimerCallback, Ci.nsIObserver]),
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get _experimentsEnabled() {
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// We can enable experiments if either unified Telemetry or FHR is on, and the user
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// has opted into Telemetry.
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return Services.prefs.getBoolPref(PREF_EXPERIMENTS_ENABLED, false) &&
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TelemetryUtils.isTelemetryEnabled;
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},
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notify(timer) {
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if (!this._experimentsEnabled) {
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return;
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}
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if (OS.Constants.Path.profileDir === undefined) {
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throw Error("Update timer fired before profile was initialized?");
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}
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let instance = Experiments.instance();
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if (instance.isReady) {
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instance.updateManifest().catch(error => {
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// Don't throw, as this breaks tests. In any case the best we can do here
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// is to log the failure.
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Cu.reportError(error);
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});
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}
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},
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_delayedInit() {
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if (!this._initialized) {
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this._initialized = true;
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Experiments.instance(); // for side effects
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}
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},
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observe(subject, topic, data) {
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switch (topic) {
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case "profile-after-change":
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if (this._experimentsEnabled) {
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Services.obs.addObserver(this, "quit-application");
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Services.obs.addObserver(this, "sessionstore-state-finalized");
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Services.obs.addObserver(this, "EM-loaded");
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if (Services.prefs.getBoolPref(PREF_ACTIVE_EXPERIMENT, false)) {
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this._initialized = true;
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Experiments.instance(); // for side effects
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}
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}
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break;
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case "sessionstore-state-finalized":
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if (!this._initialized) {
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CommonUtils.namedTimer(this._delayedInit, DELAY_INIT_MS, this, "_delayedInitTimer");
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}
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break;
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case "EM-loaded":
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if (!this._initialized) {
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Experiments.instance(); // for side effects
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this._initialized = true;
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if (this._delayedInitTimer) {
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this._delayedInitTimer.clear();
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}
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}
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break;
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case "quit-application":
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Services.obs.removeObserver(this, "quit-application");
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Services.obs.removeObserver(this, "sessionstore-state-finalized");
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Services.obs.removeObserver(this, "EM-loaded");
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if (this._delayedInitTimer) {
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this._delayedInitTimer.clear();
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}
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break;
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}
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},
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};
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this.NSGetFactory = XPCOMUtils.generateNSGetFactory([ExperimentsService]);
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