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    /**
43     * Set of failed packages remembered across job runs.
44     */
45    static final ArraySet<String> sFailedPackageNames = new ArraySet<String>();
46
47    final AtomicBoolean mIdleTime = new AtomicBoolean(false);
48
49    public static void schedule(Context context) {
50        JobScheduler js = (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
51        JobInfo job = new JobInfo.Builder(BACKGROUND_DEXOPT_JOB, sDexoptServiceName)
52                .setRequiresDeviceIdle(true)
53                .setRequiresCharging(true)
54                .build();
55        js.schedule(job);
56    }
57
58    @Override
59    public boolean onStartJob(JobParameters params) {
60        Log.i(TAG, "onIdleStart");
61        final PackageManagerService pm =
62                (PackageManagerService)ServiceManager.getService("package");
63
64        if (pm.isStorageLow()) {
65            return false;
66        }
67        final ArraySet<String> pkgs = pm.getPackagesThatNeedDexOpt();
68        if (pkgs == null) {
69            return false;
70        }
71
72        final JobParameters jobParams = params;
73        mIdleTime.set(true);
74        new Thread("BackgroundDexOptService_DexOpter") {
75            @Override
76            public void run() {
77                for (String pkg : pkgs) {
78                    if (!mIdleTime.get()) {
79                        // stopped while still working, so we need to reschedule
80                        schedule(BackgroundDexOptService.this);
81                        return;
82                    }
83                    if (sFailedPackageNames.contains(pkg)) {
84                        // skip previously failing package
85                        continue;
86                    }
87                    if (!pm.performDexOpt(pkg, null /* instruction set */, true)) {
88                        // there was a problem running dexopt,
89                        // remember this so we do not keep retrying.
90                        sFailedPackageNames.add(pkg);
91                    }
92                }
93                // ran to completion, so we abandon our timeslice and do not reschedule
94                jobFinished(jobParams, false);
95            }
96        }.start();
97        return true;
98    }
99
100    @Override
101    public boolean onStopJob(JobParameters params) {
102        Log.i(TAG, "onIdleStop");
103        mIdleTime.set(false);
104        return false;
105    }
106}
107