| 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | package org.chromium.chrome.browser; |
| 6 | |
| 7 | import org.chromium.base.CalledByNative; |
| 8 | |
| 9 | /** |
| 10 | * Watches for when Chrome is told to restart itself. |
| 11 | */ |
| 12 | public class ApplicationLifetime { |
| 13 | public interface Observer { |
| 14 | void onTerminate(boolean restart); |
| 15 | } |
| 16 | private static Observer sObserver = null; |
| 17 | |
| 18 | /** |
| 19 | * Sets the observer that monitors for ApplicationLifecycle events. |
| 20 | * We only allow one observer to be set to avoid race conditions for shutdown events. |
| 21 | */ |
| 22 | public static void setObserver(Observer observer) { |
| 23 | assert sObserver == null; |
| 24 | sObserver = observer; |
| 25 | } |
| 26 | |
| 27 | /** |
| 28 | * Removes whatever observer is currently watching this class. |
| 29 | */ |
| 30 | public static void removeObserver() { |
| 31 | sObserver = null; |
| 32 | } |
| 33 | |
| 34 | @CalledByNative |
| 35 | public static void terminate(boolean restart) { |
| 36 | if (sObserver != null) |
| 37 | sObserver.onTerminate(restart); |
| 38 | } |
| 39 | } |