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 
17 package com.android.server;
18 
19 import android.app.job.JobInfo;
20 import android.app.job.JobParameters;
21 import android.app.job.JobScheduler;
22 import android.app.job.JobService;
23 import android.content.ComponentName;
24 import android.content.Context;
25 import android.content.res.Resources;
26 import android.os.Environment;
27 import android.os.SystemProperties;
28 import android.util.Slog;
29 import android.util.TimeUtils;
30 
31 import com.android.internal.R;
32 
33 import java.util.concurrent.TimeUnit;
34 
35 /**
36  * {@link JobService} that marks
37  * {@link Environment#getDataPreloadsFileCacheDirectory() preloaded file cache} as expired after a
38  * pre-configured timeout.
39  */
40 public class PreloadsFileCacheExpirationJobService extends JobService {
41     private static final boolean DEBUG = false; // Do not submit with true
42     private static final String TAG = "PreloadsFileCacheExpirationJobService";
43 
44     // TODO move all JOB_IDs into a single class to avoid collisions
45     private static final int JOB_ID = 100500;
46 
47     private static final String PERSIST_SYS_PRELOADS_FILE_CACHE_EXPIRED
48             = "persist.sys.preloads.file_cache_expired";
49 
schedule(Context context)50     public static void schedule(Context context) {
51         int keepPreloadsMinDays = Resources.getSystem().getInteger(
52                 R.integer.config_keepPreloadsMinDays); // Default is 1 week
53         long keepPreloadsMinTimeoutMs = DEBUG ? TimeUnit.MINUTES.toMillis(2)
54                 : TimeUnit.DAYS.toMillis(keepPreloadsMinDays);
55         long keepPreloadsMaxTimeoutMs = DEBUG ? TimeUnit.MINUTES.toMillis(3)
56                 : TimeUnit.DAYS.toMillis(keepPreloadsMinDays + 1);
57 
58         if (DEBUG) {
59             StringBuilder sb = new StringBuilder("Scheduling expiration job to run in ");
60             TimeUtils.formatDuration(keepPreloadsMinTimeoutMs, sb);
61             Slog.i(TAG, sb.toString());
62         }
63         JobInfo expirationJob = new JobInfo.Builder(JOB_ID,
64                 new ComponentName(context, PreloadsFileCacheExpirationJobService.class))
65                 .setPersisted(true)
66                 .setMinimumLatency(keepPreloadsMinTimeoutMs)
67                 .setOverrideDeadline(keepPreloadsMaxTimeoutMs)
68                 .build();
69 
70         JobScheduler jobScheduler = context.getSystemService(JobScheduler.class);
71         jobScheduler.schedule(expirationJob);
72     }
73 
74     @Override
onStartJob(JobParameters params)75     public boolean onStartJob(JobParameters params) {
76         SystemProperties.set(PERSIST_SYS_PRELOADS_FILE_CACHE_EXPIRED, "1");
77         Slog.i(TAG, "Set " + PERSIST_SYS_PRELOADS_FILE_CACHE_EXPIRED + "=1");
78         return false;
79     }
80 
81     @Override
onStopJob(JobParameters params)82     public boolean onStopJob(JobParameters params) {
83         return false;
84     }
85 }
86