BackgroundDexOptService.java revision 9f837a99d48c5bb8ad7fbc133943e5bf622ce065 
1/*
2 * Copyright (C) 2014 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.pm;
18
19import android.app.job.JobInfo;
20import android.app.job.JobParameters;
21import android.app.job.JobScheduler;
22import android.app.job.JobService;
23import android.content.ComponentName;
24import android.content.Context;
25import android.os.ServiceManager;
26import android.util.ArraySet;
27import android.util.Log;
28
29import java.util.concurrent.atomic.AtomicBoolean;
30
31/**
32 * {@hide}
33 */
34public class BackgroundDexOptService extends JobService {
35    static final String TAG = "BackgroundDexOptService";
36
37    static final int BACKGROUND_DEXOPT_JOB = 800;
38    private static ComponentName sDexoptServiceName = new ComponentName(
39            "android",
40            BackgroundDexOptService.class.getName());
41
42    final AtomicBoolean mIdleTime = new AtomicBoolean(false);
43
44    public static void schedule(Context context) {
45        JobScheduler js = (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
46        JobInfo job = new JobInfo.Builder(BACKGROUND_DEXOPT_JOB, sDexoptServiceName)
47                .setRequiresDeviceIdle(true)
48                .setRequiresCharging(true)
49                .build();
50        js.schedule(job);
51    }
52
53    @Override
54    public boolean onStartJob(JobParameters params) {
55        Log.i(TAG, "onIdleStart");
56        final PackageManagerService pm =
57                (PackageManagerService)ServiceManager.getService("package");
58
59        if (pm.isStorageLow()) {
60            return false;
61        }
62        final ArraySet<String> pkgs = pm.getPackagesThatNeedDexOpt();
63        if (pkgs == null) {
64            return false;
65        }
66
67        final JobParameters jobParams = params;
68        mIdleTime.set(true);
69        new Thread("BackgroundDexOptService_DexOpter") {
70            @Override
71            public void run() {
72                for (String pkg : pkgs) {
73                    if (!mIdleTime.get()) {
74                        // stopped while still working, so we need to reschedule
75                        schedule(BackgroundDexOptService.this);
76                        return;
77                    }
78                    pm.performDexOpt(pkg, null /* instruction set */, true);
79                }
80                // ran to completion, so we abandon our timeslice and do not reschedule
81                jobFinished(jobParams, false);
82            }
83        }.start();
84        return true;
85    }
86
87    @Override
88    public boolean onStopJob(JobParameters params) {
89        Log.i(TAG, "onIdleStop");
90        mIdleTime.set(false);
91        return false;
92    }
93}
94