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      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 
     17 package com.android.server.pm;
     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.os.ServiceManager;
     26 import android.util.ArraySet;
     27 import android.util.Log;
     28 
     29 import java.util.concurrent.atomic.AtomicBoolean;
     30 
     31 /**
     32  * {@hide}
     33  */
     34 public 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