1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/*
* Copyright 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.work.impl;
import static androidx.work.impl.utils.PackageManagerHelper.setComponentEnabled;
import android.content.Context;
import android.os.Build;
import android.support.annotation.NonNull;
import android.support.annotation.RestrictTo;
import android.support.annotation.VisibleForTesting;
import android.util.Log;
import androidx.work.Configuration;
import androidx.work.impl.background.systemalarm.SystemAlarmScheduler;
import androidx.work.impl.background.systemalarm.SystemAlarmService;
import androidx.work.impl.background.systemjob.SystemJobScheduler;
import androidx.work.impl.background.systemjob.SystemJobService;
import androidx.work.impl.model.WorkSpec;
import androidx.work.impl.model.WorkSpecDao;
import java.lang.reflect.InvocationTargetException;
import java.util.List;
/**
* Helper methods for {@link Scheduler}s.
*
* Helps schedule {@link androidx.work.impl.model.WorkSpec}s while enforcing
* {@link Scheduler#MAX_SCHEDULER_LIMIT}s.
*
* @hide
*/
@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
public class Schedulers {
private static final String TAG = "Schedulers";
private static final String FIREBASE_JOB_SCHEDULER_CLASSNAME =
"androidx.work.impl.background.firebase.FirebaseJobScheduler";
@VisibleForTesting
static final String FIREBASE_JOB_SERVICE_CLASSNAME =
"androidx.work.impl.background.firebase.FirebaseJobService";
/**
* Schedules {@link WorkSpec}s while honoring the {@link Scheduler#MAX_SCHEDULER_LIMIT}.
*
* @param workDatabase The {@link WorkDatabase}.
* @param schedulers The {@link List} of {@link Scheduler}s to delegate to.
*/
public static void schedule(
@NonNull Configuration configuration,
@NonNull WorkDatabase workDatabase,
List<Scheduler> schedulers) {
WorkSpecDao workSpecDao = workDatabase.workSpecDao();
List<WorkSpec> eligibleWorkSpecs =
workSpecDao.getEligibleWorkForScheduling(
configuration.getMaxSchedulerLimit());
scheduleInternal(workDatabase, schedulers, eligibleWorkSpecs);
}
private static void scheduleInternal(
@NonNull WorkDatabase workDatabase,
List<Scheduler> schedulers,
List<WorkSpec> workSpecs) {
if (workSpecs == null || schedulers == null) {
return;
}
long now = System.currentTimeMillis();
WorkSpecDao workSpecDao = workDatabase.workSpecDao();
// Mark all the WorkSpecs as scheduled.
// Calls to Scheduler#schedule() could potentially result in more schedules
// on a separate thread. Therefore, this needs to be done first.
workDatabase.beginTransaction();
try {
for (WorkSpec workSpec : workSpecs) {
workSpecDao.markWorkSpecScheduled(workSpec.id, now);
}
workDatabase.setTransactionSuccessful();
} finally {
workDatabase.endTransaction();
}
WorkSpec[] eligibleWorkSpecsArray = workSpecs.toArray(new WorkSpec[0]);
// Delegate to the underlying scheduler.
for (Scheduler scheduler : schedulers) {
scheduler.schedule(eligibleWorkSpecsArray);
}
}
static @NonNull Scheduler createBestAvailableBackgroundScheduler(
@NonNull Context context,
@NonNull WorkManagerImpl workManager) {
Scheduler scheduler;
boolean enableFirebaseJobService = false;
boolean enableSystemAlarmService = false;
if (Build.VERSION.SDK_INT >= WorkManagerImpl.MIN_JOB_SCHEDULER_API_LEVEL) {
scheduler = new SystemJobScheduler(context, workManager);
setComponentEnabled(context, SystemJobService.class, true);
Log.d(TAG, "Created SystemJobScheduler and enabled SystemJobService");
} else {
try {
scheduler = tryCreateFirebaseJobScheduler(context);
enableFirebaseJobService = true;
Log.d(TAG, "Created FirebaseJobScheduler");
} catch (Exception e) {
// Also catches the exception thrown if Play Services was not found on the device.
scheduler = new SystemAlarmScheduler(context);
enableSystemAlarmService = true;
Log.d(TAG, "Created SystemAlarmScheduler");
}
}
try {
Class firebaseJobServiceClass = Class.forName(FIREBASE_JOB_SERVICE_CLASSNAME);
setComponentEnabled(context, firebaseJobServiceClass, enableFirebaseJobService);
} catch (ClassNotFoundException e) {
// Do nothing.
}
setComponentEnabled(context, SystemAlarmService.class, enableSystemAlarmService);
return scheduler;
}
@NonNull
private static Scheduler tryCreateFirebaseJobScheduler(@NonNull Context context)
throws ClassNotFoundException, IllegalAccessException, InstantiationException,
InvocationTargetException, NoSuchMethodException {
Class<?> firebaseJobSchedulerClass = Class.forName(FIREBASE_JOB_SCHEDULER_CLASSNAME);
return (Scheduler) firebaseJobSchedulerClass
.getConstructor(Context.class)
.newInstance(context);
}
private Schedulers() {
}
}
|
