Changes

; getAddonBySyncGUID(syncGUID, callback) : Obtain an add-on from its Sync GUID. Calls the supplied function when that add-on is retrieved. The callback receives null on unknown add-on or the add-on object (generated from the underlying provider) on success. This API technically isn't required, but it makes the Add-on engine's createRecord(syncGUID) API much simpler. Without it, Sync code would probably query for all add-ons and iterate until it finds a match. By pushing the logic to AddonManager, optimization can be done there, if needed.

<pre>foreach record in records: if record.isDeleted: found = this.getAddonBySyncGUID(record.syncGUID) if found: this.deleteAddon(found) # else nothing to do since record not found

callbackObj.onSuccess(record) continue

existing = this.getExistingAddonBySyncData(record.syncData) result = null if existing: result = existing.mergeupdateFromSyncData(record.syncData) else: result = this.installAddonFromSyncData(syncGUID, syncData)

// call result ? callbackObj.onSuccess on (record) : callbackObj.onFailure depending on result of above(record)

callbackObj.onFinished()</pre>