1 /*
2  * Copyright (C) 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
5  * except in compliance with the License. You may obtain a copy of the License at
6  *
7  *      http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software distributed under the
10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
11  * KIND, either express or implied. See the License for the specific language governing
12  * permissions and limitations under the License.
13  */
14 
15 package com.android.server.backup;
16 
17 import android.app.backup.BlobBackupHelper;
18 import android.app.slice.ISliceManager;
19 import android.content.Context;
20 import android.os.ServiceManager;
21 import android.os.UserHandle;
22 import android.util.Log;
23 import android.util.Slog;
24 
25 public class SliceBackupHelper extends BlobBackupHelper {
26     static final String TAG = "SliceBackupHelper";
27     static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);
28 
29     // Current version of the blob schema
30     static final int BLOB_VERSION = 1;
31 
32     // Key under which the payload blob is stored
33     static final String KEY_SLICES = "slices";
34 
SliceBackupHelper(Context context)35     public SliceBackupHelper(Context context) {
36         super(BLOB_VERSION, KEY_SLICES);
37         // context is currently unused
38     }
39 
40     @Override
getBackupPayload(String key)41     protected byte[] getBackupPayload(String key) {
42         byte[] newPayload = null;
43         if (KEY_SLICES.equals(key)) {
44             try {
45                 ISliceManager sm = ISliceManager.Stub.asInterface(
46                         ServiceManager.getService(Context.SLICE_SERVICE));
47                 // TODO: http://b/22388012
48                 newPayload = sm.getBackupPayload(UserHandle.USER_SYSTEM);
49             } catch (Exception e) {
50                 // Treat as no data
51                 Slog.e(TAG, "Couldn't communicate with slice manager", e);
52                 newPayload = null;
53             }
54         }
55         return newPayload;
56     }
57 
58     @Override
applyRestoredPayload(String key, byte[] payload)59     protected void applyRestoredPayload(String key, byte[] payload) {
60         if (DEBUG) Slog.v(TAG, "Got restore of " + key);
61 
62         if (KEY_SLICES.equals(key)) {
63             try {
64                 ISliceManager sm = ISliceManager.Stub.asInterface(
65                         ServiceManager.getService(Context.SLICE_SERVICE));
66                 // TODO: http://b/22388012
67                 sm.applyRestore(payload, UserHandle.USER_SYSTEM);
68             } catch (Exception e) {
69                 Slog.e(TAG, "Couldn't communicate with slice manager", e);
70             }
71         }
72     }
73 
74 }
75