1 /*
2  * Copyright (C) 2012 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.calendar.alerts;
18 
19 import android.app.IntentService;
20 import android.content.ContentValues;
21 import android.content.Intent;
22 import android.net.Uri;
23 import android.os.SystemClock;
24 import android.provider.CalendarContract;
25 import android.util.Log;
26 
27 /**
28  * Service for clearing all scheduled alerts from the CalendarAlerts table and
29  * rescheduling them.  This is expected to be called only on boot up, to restore
30  * the AlarmManager alarms that were lost on device restart.
31  */
32 public class InitAlarmsService extends IntentService {
33     private static final String TAG = "InitAlarmsService";
34     private static final String SCHEDULE_ALARM_REMOVE_PATH = "schedule_alarms_remove";
35     private static final Uri SCHEDULE_ALARM_REMOVE_URI = Uri.withAppendedPath(
36             CalendarContract.CONTENT_URI, SCHEDULE_ALARM_REMOVE_PATH);
37 
38     // Delay for rescheduling the alarms must be great enough to minimize race
39     // conditions with the provider's boot up actions.
40     private static final long DELAY_MS = 30000;
41 
InitAlarmsService()42     public InitAlarmsService() {
43         super("InitAlarmsService");
44     }
45 
46     @Override
onHandleIntent(Intent intent)47     protected void onHandleIntent(Intent intent) {
48         // Delay to avoid race condition of in-progress alarm scheduling in provider.
49         SystemClock.sleep(DELAY_MS);
50         Log.d(TAG, "Clearing and rescheduling alarms.");
51         try {
52             getContentResolver().update(SCHEDULE_ALARM_REMOVE_URI, new ContentValues(), null,
53                     null);
54         } catch (java.lang.IllegalArgumentException e) {
55             // java.lang.IllegalArgumentException:
56             //     Unknown URI content://com.android.calendar/schedule_alarms_remove
57 
58             // Until b/7742576 is resolved, just catch the exception so the app won't crash
59             Log.e(TAG, "update failed: " + e.toString());
60         }
61     }
62 }
63