PerformInitializeTask.java revision 387267eafebaed8abe031efcb6d6379292503d48 
1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License
15 */
16
17package com.android.server.backup.internal;
18
19import static com.android.server.backup.RefactoredBackupManagerService.TAG;
20
21import android.app.AlarmManager;
22import android.app.backup.BackupTransport;
23import android.app.backup.IBackupObserver;
24import android.os.RemoteException;
25import android.os.SystemClock;
26import android.util.EventLog;
27import android.util.Slog;
28
29import com.android.internal.backup.IBackupTransport;
30import com.android.server.EventLogTags;
31import com.android.server.backup.RefactoredBackupManagerService;
32
33import java.io.File;
34
35public class PerformInitializeTask implements Runnable {
36
37    private RefactoredBackupManagerService backupManagerService;
38    String[] mQueue;
39    IBackupObserver mObserver;
40
41    public PerformInitializeTask(RefactoredBackupManagerService backupManagerService,
42            String[] transportNames, IBackupObserver observer) {
43        this.backupManagerService = backupManagerService;
44        mQueue = transportNames;
45        mObserver = observer;
46    }
47
48    private void notifyResult(String target, int status) {
49        try {
50            if (mObserver != null) {
51                mObserver.onResult(target, status);
52            }
53        } catch (RemoteException ignored) {
54            mObserver = null;       // don't try again
55        }
56    }
57
58    private void notifyFinished(int status) {
59        try {
60            if (mObserver != null) {
61                mObserver.backupFinished(status);
62            }
63        } catch (RemoteException ignored) {
64            mObserver = null;
65        }
66    }
67
68    public void run() {
69        // mWakelock is *acquired* when execution begins here
70        int result = BackupTransport.TRANSPORT_OK;
71        try {
72            for (String transportName : mQueue) {
73                IBackupTransport transport =
74                        backupManagerService.getTransportManager().getTransportBinder(
75                                transportName);
76                if (transport == null) {
77                    Slog.e(TAG, "Requested init for " + transportName + " but not found");
78                    continue;
79                }
80
81                Slog.i(TAG, "Initializing (wiping) backup transport storage: " + transportName);
82                String transportDirName = transport.transportDirName();
83                EventLog.writeEvent(EventLogTags.BACKUP_START, transportDirName);
84                long startRealtime = SystemClock.elapsedRealtime();
85                int status = transport.initializeDevice();
86
87                if (status == BackupTransport.TRANSPORT_OK) {
88                    status = transport.finishBackup();
89                }
90
91                // Okay, the wipe really happened.  Clean up our local bookkeeping.
92                if (status == BackupTransport.TRANSPORT_OK) {
93                    Slog.i(TAG, "Device init successful");
94                    int millis = (int) (SystemClock.elapsedRealtime() - startRealtime);
95                    EventLog.writeEvent(EventLogTags.BACKUP_INITIALIZE);
96                    backupManagerService
97                            .resetBackupState(new File(backupManagerService.getBaseStateDir(),
98                                    transportDirName));
99                    EventLog.writeEvent(EventLogTags.BACKUP_SUCCESS, 0, millis);
100                    synchronized (backupManagerService.getQueueLock()) {
101                        backupManagerService.recordInitPendingLocked(false, transportName);
102                    }
103                    notifyResult(transportName, BackupTransport.TRANSPORT_OK);
104                } else {
105                    // If this didn't work, requeue this one and try again
106                    // after a suitable interval
107                    Slog.e(TAG, "Transport error in initializeDevice()");
108                    EventLog.writeEvent(EventLogTags.BACKUP_TRANSPORT_FAILURE, "(initialize)");
109                    synchronized (backupManagerService.getQueueLock()) {
110                        backupManagerService.recordInitPendingLocked(true, transportName);
111                    }
112                    notifyResult(transportName, status);
113                    result = status;
114
115                    // do this via another alarm to make sure of the wakelock states
116                    long delay = transport.requestBackupTime();
117                    Slog.w(TAG, "Init failed on " + transportName + " resched in " + delay);
118                    backupManagerService.getAlarmManager().set(AlarmManager.RTC_WAKEUP,
119                            System.currentTimeMillis() + delay,
120                            backupManagerService.getRunInitIntent());
121                }
122            }
123        } catch (Exception e) {
124            Slog.e(TAG, "Unexpected error performing init", e);
125            result = BackupTransport.TRANSPORT_ERROR;
126        } finally {
127            // Done; release the wakelock
128            notifyFinished(result);
129            backupManagerService.getWakelock().release();
130        }
131    }
132}
133