1 /*
2  * Copyright (C) 2020 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 
17 package com.android.server.people.data;
18 
19 import android.annotation.UserIdInt;
20 import android.app.job.JobInfo;
21 import android.app.job.JobParameters;
22 import android.app.job.JobScheduler;
23 import android.app.job.JobService;
24 import android.content.ComponentName;
25 import android.content.Context;
26 import android.os.CancellationSignal;
27 
28 import com.android.server.LocalServices;
29 import com.android.server.people.PeopleServiceInternal;
30 
31 import java.util.concurrent.TimeUnit;
32 
33 /**
34  * This service runs periodically to ensure the data consistency and the retention policy for a
35  * specific user's data.
36  */
37 public class DataMaintenanceService extends JobService {
38 
39     private static final long JOB_RUN_INTERVAL = TimeUnit.HOURS.toMillis(24);
40 
41     /** This job ID must be unique within the system server. */
42     private static final int BASE_JOB_ID = 0xC315BD7;  // 204561367
43 
scheduleJob(Context context, @UserIdInt int userId)44     static void scheduleJob(Context context, @UserIdInt int userId) {
45         int jobId = getJobId(userId);
46         JobScheduler jobScheduler = context.getSystemService(JobScheduler.class);
47         if (jobScheduler.getPendingJob(jobId) == null) {
48             ComponentName component = new ComponentName(context, DataMaintenanceService.class);
49             JobInfo newJob = new JobInfo.Builder(jobId, component)
50                     .setRequiresDeviceIdle(true)
51                     .setPeriodic(JOB_RUN_INTERVAL)
52                     .build();
53             jobScheduler.schedule(newJob);
54         }
55     }
56 
cancelJob(Context context, @UserIdInt int userId)57     static void cancelJob(Context context, @UserIdInt int userId) {
58         JobScheduler jobScheduler = context.getSystemService(JobScheduler.class);
59         jobScheduler.cancel(getJobId(userId));
60     }
61 
62     private CancellationSignal mSignal;
63 
64     @Override
onStartJob(JobParameters params)65     public boolean onStartJob(JobParameters params) {
66         int userId = getUserId(params.getJobId());
67         mSignal = new CancellationSignal();
68         new Thread(() -> {
69             PeopleServiceInternal peopleServiceInternal =
70                     LocalServices.getService(PeopleServiceInternal.class);
71             peopleServiceInternal.pruneDataForUser(userId, mSignal);
72             jobFinished(params, mSignal.isCanceled());
73         }).start();
74         return true;
75     }
76 
77     @Override
onStopJob(JobParameters params)78     public boolean onStopJob(JobParameters params) {
79         if (mSignal != null) {
80             mSignal.cancel();
81         }
82         return false;
83     }
84 
getJobId(@serIdInt int userId)85     private static int getJobId(@UserIdInt int userId) {
86         return BASE_JOB_ID + userId;
87     }
88 
getUserId(int jobId)89     private static @UserIdInt int getUserId(int jobId) {
90         return jobId - BASE_JOB_ID;
91     }
92 }
93