mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-09 20:54:40 +00:00
407 lines
11 KiB
JavaScript
407 lines
11 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/. */
|
|
|
|
#ifndef MERGED_COMPARTMENT
|
|
|
|
"use strict";
|
|
|
|
this.EXPORTED_SYMBOLS = [
|
|
"SessionRecorder",
|
|
];
|
|
|
|
const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
|
|
|
|
#endif
|
|
|
|
Cu.import("resource://gre/modules/Preferences.jsm");
|
|
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
|
|
Cu.import("resource://gre/modules/Log.jsm");
|
|
Cu.import("resource://services-common/utils.js");
|
|
|
|
|
|
// We automatically prune sessions older than this.
|
|
const MAX_SESSION_AGE_MS = 7 * 24 * 60 * 60 * 1000; // 7 days.
|
|
const STARTUP_RETRY_INTERVAL_MS = 5000;
|
|
|
|
// Wait up to 5 minutes for startup measurements before giving up.
|
|
const MAX_STARTUP_TRIES = 300000 / STARTUP_RETRY_INTERVAL_MS;
|
|
|
|
/**
|
|
* Records information about browser sessions.
|
|
*
|
|
* This serves as an interface to both current session information as
|
|
* well as a history of previous sessions.
|
|
*
|
|
* Typically only one instance of this will be installed in an
|
|
* application. It is typically managed by an XPCOM service. The
|
|
* instance is instantiated at application start; onStartup is called
|
|
* once the profile is installed; onShutdown is called during shutdown.
|
|
*
|
|
* We currently record state in preferences. However, this should be
|
|
* invisible to external consumers. We could easily swap in a different
|
|
* storage mechanism if desired.
|
|
*
|
|
* Please note the different semantics for storing times and dates in
|
|
* preferences. Full dates (notably the session start time) are stored
|
|
* as strings because preferences have a 32-bit limit on integer values
|
|
* and milliseconds since UNIX epoch would overflow. Many times are
|
|
* stored as integer offsets from the session start time because they
|
|
* should not overflow 32 bits.
|
|
*
|
|
* Since this records history of all sessions, there is a possibility
|
|
* for unbounded data aggregation. This is curtailed through:
|
|
*
|
|
* 1) An "idle-daily" observer which delete sessions older than
|
|
* MAX_SESSION_AGE_MS.
|
|
* 2) The creator of this instance explicitly calling
|
|
* `pruneOldSessions`.
|
|
*
|
|
* @param branch
|
|
* (string) Preferences branch on which to record state.
|
|
*/
|
|
this.SessionRecorder = function (branch) {
|
|
if (!branch) {
|
|
throw new Error("branch argument must be defined.");
|
|
}
|
|
|
|
if (!branch.endsWith(".")) {
|
|
throw new Error("branch argument must end with '.': " + branch);
|
|
}
|
|
|
|
this._log = Log.repository.getLogger("Services.DataReporting.SessionRecorder");
|
|
|
|
this._prefs = new Preferences(branch);
|
|
this._lastActivityWasInactive = false;
|
|
this._activeTicks = 0;
|
|
this.fineTotalTime = 0;
|
|
this._started = false;
|
|
this._timer = null;
|
|
this._startupFieldTries = 0;
|
|
|
|
this._os = Cc["@mozilla.org/observer-service;1"]
|
|
.getService(Ci.nsIObserverService);
|
|
|
|
};
|
|
|
|
SessionRecorder.prototype = Object.freeze({
|
|
QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver]),
|
|
|
|
STARTUP_RETRY_INTERVAL_MS: STARTUP_RETRY_INTERVAL_MS,
|
|
|
|
get _currentIndex() {
|
|
return this._prefs.get("currentIndex", 0);
|
|
},
|
|
|
|
set _currentIndex(value) {
|
|
this._prefs.set("currentIndex", value);
|
|
},
|
|
|
|
get _prunedIndex() {
|
|
return this._prefs.get("prunedIndex", 0);
|
|
},
|
|
|
|
set _prunedIndex(value) {
|
|
this._prefs.set("prunedIndex", value);
|
|
},
|
|
|
|
get startDate() {
|
|
return CommonUtils.getDatePref(this._prefs, "current.startTime");
|
|
},
|
|
|
|
set _startDate(value) {
|
|
CommonUtils.setDatePref(this._prefs, "current.startTime", value);
|
|
},
|
|
|
|
get activeTicks() {
|
|
return this._prefs.get("current.activeTicks", 0);
|
|
},
|
|
|
|
incrementActiveTicks: function () {
|
|
this._prefs.set("current.activeTicks", ++this._activeTicks);
|
|
},
|
|
|
|
/**
|
|
* Total time of this session in integer seconds.
|
|
*
|
|
* See also fineTotalTime for the time in milliseconds.
|
|
*/
|
|
get totalTime() {
|
|
return this._prefs.get("current.totalTime", 0);
|
|
},
|
|
|
|
updateTotalTime: function () {
|
|
// We store millisecond precision internally to prevent drift from
|
|
// repeated rounding.
|
|
this.fineTotalTime = Date.now() - this.startDate;
|
|
this._prefs.set("current.totalTime", Math.floor(this.fineTotalTime / 1000));
|
|
},
|
|
|
|
get main() {
|
|
return this._prefs.get("current.main", -1);
|
|
},
|
|
|
|
set _main(value) {
|
|
if (!Number.isInteger(value)) {
|
|
throw new Error("main time must be an integer.");
|
|
}
|
|
|
|
this._prefs.set("current.main", value);
|
|
},
|
|
|
|
get firstPaint() {
|
|
return this._prefs.get("current.firstPaint", -1);
|
|
},
|
|
|
|
set _firstPaint(value) {
|
|
if (!Number.isInteger(value)) {
|
|
throw new Error("firstPaint must be an integer.");
|
|
}
|
|
|
|
this._prefs.set("current.firstPaint", value);
|
|
},
|
|
|
|
get sessionRestored() {
|
|
return this._prefs.get("current.sessionRestored", -1);
|
|
},
|
|
|
|
set _sessionRestored(value) {
|
|
if (!Number.isInteger(value)) {
|
|
throw new Error("sessionRestored must be an integer.");
|
|
}
|
|
|
|
this._prefs.set("current.sessionRestored", value);
|
|
},
|
|
|
|
getPreviousSessions: function () {
|
|
let result = {};
|
|
|
|
for (let i = this._prunedIndex; i < this._currentIndex; i++) {
|
|
let s = this.getPreviousSession(i);
|
|
if (!s) {
|
|
continue;
|
|
}
|
|
|
|
result[i] = s;
|
|
}
|
|
|
|
return result;
|
|
},
|
|
|
|
getPreviousSession: function (index) {
|
|
return this._deserialize(this._prefs.get("previous." + index));
|
|
},
|
|
|
|
/**
|
|
* Prunes old, completed sessions that started earlier than the
|
|
* specified date.
|
|
*/
|
|
pruneOldSessions: function (date) {
|
|
for (let i = this._prunedIndex; i < this._currentIndex; i++) {
|
|
let s = this.getPreviousSession(i);
|
|
if (!s) {
|
|
continue;
|
|
}
|
|
|
|
if (s.startDate >= date) {
|
|
continue;
|
|
}
|
|
|
|
this._log.debug("Pruning session #" + i + ".");
|
|
this._prefs.reset("previous." + i);
|
|
this._prunedIndex = i;
|
|
}
|
|
},
|
|
|
|
recordStartupFields: function () {
|
|
let si = this._getStartupInfo();
|
|
|
|
if (!si.process) {
|
|
throw new Error("Startup info not available.");
|
|
}
|
|
|
|
let missing = false;
|
|
|
|
for (let field of ["main", "firstPaint", "sessionRestored"]) {
|
|
if (!(field in si)) {
|
|
this._log.debug("Missing startup field: " + field);
|
|
missing = true;
|
|
continue;
|
|
}
|
|
|
|
this["_" + field] = si[field].getTime() - si.process.getTime();
|
|
}
|
|
|
|
if (!missing || this._startupFieldTries > MAX_STARTUP_TRIES) {
|
|
this._clearStartupTimer();
|
|
return;
|
|
}
|
|
|
|
// If we have missing fields, install a timer and keep waiting for
|
|
// data.
|
|
this._startupFieldTries++;
|
|
|
|
if (!this._timer) {
|
|
this._timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
|
|
this._timer.initWithCallback({
|
|
notify: this.recordStartupFields.bind(this),
|
|
}, this.STARTUP_RETRY_INTERVAL_MS, this._timer.TYPE_REPEATING_SLACK);
|
|
}
|
|
},
|
|
|
|
_clearStartupTimer: function () {
|
|
if (this._timer) {
|
|
this._timer.cancel();
|
|
delete this._timer;
|
|
}
|
|
},
|
|
|
|
/**
|
|
* Perform functionality on application startup.
|
|
*
|
|
* This is typically called in a "profile-do-change" handler.
|
|
*/
|
|
onStartup: function () {
|
|
if (this._started) {
|
|
throw new Error("onStartup has already been called.");
|
|
}
|
|
|
|
let si = this._getStartupInfo();
|
|
if (!si.process) {
|
|
throw new Error("Process information not available. Misconfigured app?");
|
|
}
|
|
|
|
this._started = true;
|
|
|
|
this._os.addObserver(this, "profile-before-change", false);
|
|
this._os.addObserver(this, "user-interaction-active", false);
|
|
this._os.addObserver(this, "user-interaction-inactive", false);
|
|
this._os.addObserver(this, "idle-daily", false);
|
|
|
|
// This has the side-effect of clearing current session state.
|
|
this._moveCurrentToPrevious();
|
|
|
|
this._startDate = si.process;
|
|
this._prefs.set("current.activeTicks", 0);
|
|
this.updateTotalTime();
|
|
|
|
this.recordStartupFields();
|
|
},
|
|
|
|
/**
|
|
* Record application activity.
|
|
*/
|
|
onActivity: function (active) {
|
|
let updateActive = active && !this._lastActivityWasInactive;
|
|
this._lastActivityWasInactive = !active;
|
|
|
|
this.updateTotalTime();
|
|
|
|
if (updateActive) {
|
|
this.incrementActiveTicks();
|
|
}
|
|
},
|
|
|
|
onShutdown: function () {
|
|
this._log.info("Recording clean session shutdown.");
|
|
this._prefs.set("current.clean", true);
|
|
this.updateTotalTime();
|
|
this._clearStartupTimer();
|
|
|
|
this._os.removeObserver(this, "profile-before-change");
|
|
this._os.removeObserver(this, "user-interaction-active");
|
|
this._os.removeObserver(this, "user-interaction-inactive");
|
|
this._os.removeObserver(this, "idle-daily");
|
|
},
|
|
|
|
_CURRENT_PREFS: [
|
|
"current.startTime",
|
|
"current.activeTicks",
|
|
"current.totalTime",
|
|
"current.main",
|
|
"current.firstPaint",
|
|
"current.sessionRestored",
|
|
"current.clean",
|
|
],
|
|
|
|
// This is meant to be called only during onStartup().
|
|
_moveCurrentToPrevious: function () {
|
|
try {
|
|
if (!this.startDate.getTime()) {
|
|
this._log.info("No previous session. Is this first app run?");
|
|
return;
|
|
}
|
|
|
|
let clean = this._prefs.get("current.clean", false);
|
|
|
|
let count = this._currentIndex++;
|
|
let obj = {
|
|
s: this.startDate.getTime(),
|
|
a: this.activeTicks,
|
|
t: this.totalTime,
|
|
c: clean,
|
|
m: this.main,
|
|
fp: this.firstPaint,
|
|
sr: this.sessionRestored,
|
|
};
|
|
|
|
this._log.debug("Recording last sessions as #" + count + ".");
|
|
this._prefs.set("previous." + count, JSON.stringify(obj));
|
|
} catch (ex) {
|
|
this._log.warn("Exception when migrating last session: " +
|
|
CommonUtils.exceptionStr(ex));
|
|
} finally {
|
|
this._log.debug("Resetting prefs from last session.");
|
|
for (let pref of this._CURRENT_PREFS) {
|
|
this._prefs.reset(pref);
|
|
}
|
|
}
|
|
},
|
|
|
|
_deserialize: function (s) {
|
|
let o;
|
|
try {
|
|
o = JSON.parse(s);
|
|
} catch (ex) {
|
|
return null;
|
|
}
|
|
|
|
return {
|
|
startDate: new Date(o.s),
|
|
activeTicks: o.a,
|
|
totalTime: o.t,
|
|
clean: !!o.c,
|
|
main: o.m,
|
|
firstPaint: o.fp,
|
|
sessionRestored: o.sr,
|
|
};
|
|
},
|
|
|
|
// Implemented as a function to allow for monkeypatching in tests.
|
|
_getStartupInfo: function () {
|
|
return Cc["@mozilla.org/toolkit/app-startup;1"]
|
|
.getService(Ci.nsIAppStartup)
|
|
.getStartupInfo();
|
|
},
|
|
|
|
observe: function (subject, topic, data) {
|
|
switch (topic) {
|
|
case "profile-before-change":
|
|
this.onShutdown();
|
|
break;
|
|
|
|
case "user-interaction-active":
|
|
this.onActivity(true);
|
|
break;
|
|
|
|
case "user-interaction-inactive":
|
|
this.onActivity(false);
|
|
break;
|
|
|
|
case "idle-daily":
|
|
this.pruneOldSessions(new Date(Date.now() - MAX_SESSION_AGE_MS));
|
|
break;
|
|
}
|
|
},
|
|
});
|