gecko/services/sync/modules/engines/apps.js
Gregory Szorc 45d3f90cf3 Bug 785225 - Part 9: Refactor engines to not use singletons; r=rnewman
Engines now maintain a reference to the service they belong to. This
allows them to obtain references to other engine instances belonging to
that service and that service only.

Stores and trackers now maintain a reference to the engine they belong
to.

Engine managers now maintain a reference back to a service.

The clients singleton has been removed. It now exists as an instance
variable on Service. Parts of ClientsEngine do behave as singletons
(e.g. commands). This will be addressed in future refactoring.
2012-08-29 14:43:41 -07:00

137 lines
3.7 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 EXPORTED_SYMBOLS = ['AppsEngine', 'AppRec'];
const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components;
Cu.import("resource://services-sync/util.js");
Cu.import("resource://services-sync/record.js");
Cu.import("resource://services-sync/engines.js");
Cu.import("resource://services-sync/constants.js");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
Cu.import("resource://gre/modules/Webapps.jsm");
function AppRec(collection, id) {
CryptoWrapper.call(this, collection, id);
}
AppRec.prototype = {
__proto__: CryptoWrapper.prototype,
_logName: "Sync.Record.App"
}
Utils.deferGetSet(AppRec, "cleartext", ["value"]);
function AppStore(name, engine) {
Store.call(this, name, engine);
}
AppStore.prototype = {
__proto__: Store.prototype,
getAllIDs: function getAllIDs() {
let apps = DOMApplicationRegistry.getAllIDs();
return apps;
},
changeItemID: function changeItemID(oldID, newID) {
this._log.trace("AppsStore does not support changeItemID");
},
itemExists: function itemExists(guid) {
return DOMApplicationRegistry.itemExists(guid);
},
createRecord: function createRecord(guid, collection) {
let record = new AppRec(collection, guid);
let app = DOMApplicationRegistry.getAppById(guid);
if (app) {
app.syncId = guid;
let callback = Async.makeSyncCallback();
DOMApplicationRegistry.getManifestFor(app.origin, function(aManifest) {
app.manifest = aManifest;
callback();
});
Async.waitForSyncCallback(callback);
record.value = app;
} else {
record.deleted = true;
}
return record;
},
applyIncomingBatch: function applyIncomingBatch(aRecords) {
let callback = Async.makeSyncCallback();
DOMApplicationRegistry.updateApps(aRecords, callback);
Async.waitForSyncCallback(callback);
return [];
},
wipe: function wipe(record) {
let callback = Async.makeSyncCallback();
DOMApplicationRegistry.wipe(callback);
Async.waitForSyncCallback(callback);
}
}
function AppTracker(name, engine) {
Tracker.call(this, name, engine);
Svc.Obs.add("weave:engine:start-tracking", this);
Svc.Obs.add("weave:engine:stop-tracking", this);
}
AppTracker.prototype = {
__proto__: Tracker.prototype,
QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver]),
_enabled: false,
observe: function(aSubject, aTopic, aData) {
switch (aTopic) {
case "webapps-sync-install":
case "webapps-sync-uninstall":
// ask for immediate sync. not sure if we really need this or
// if a lower score increment would be enough
let app;
this.score += SCORE_INCREMENT_XLARGE;
try {
app = JSON.parse(aData);
} catch (e) {
this._log.error("JSON.parse failed in observer " + e);
return;
}
this.addChangedID(app.id);
break;
case "weave:engine:start-tracking":
this._enabled = true;
Svc.Obs.add("webapps-sync-install", this);
Svc.Obs.add("webapps-sync-uninstall", this);
break;
case "weave:engine:stop-tracking":
this._enabled = false;
Svc.Obs.remove("webapps-sync-install", this);
Svc.Obs.remove("webapps-sync-uninstall", this);
break;
}
}
}
function AppsEngine(service) {
SyncEngine.call(this, "Apps", service);
}
AppsEngine.prototype = {
__proto__: SyncEngine.prototype,
_storeObj: AppStore,
_trackerObj: AppTracker,
_recordObj: AppRec,
applyIncomingBatchSize: APPS_STORE_BATCH_SIZE
}