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      1 /*
      2  * Copyright (C) 2017 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.timezone;
     18 
     19 import com.android.server.LocalServices;
     20 
     21 import android.app.job.JobInfo;
     22 import android.app.job.JobParameters;
     23 import android.app.job.JobScheduler;
     24 import android.app.job.JobService;
     25 import android.content.ComponentName;
     26 import android.content.Context;
     27 import android.util.Slog;
     28 
     29 /**
     30  * A JobService used to trigger time zone rules update work when a device falls idle.
     31  */
     32 public final class TimeZoneUpdateIdler extends JobService {
     33 
     34     private static final String TAG = "timezone.TimeZoneUpdateIdler";
     35 
     36     /** The static job ID used to handle on-idle work. */
     37     // Must be unique within UID (system service)
     38     private static final int TIME_ZONE_UPDATE_IDLE_JOB_ID = 27042305;
     39 
     40     @Override
     41     public boolean onStartJob(JobParameters params) {
     42         RulesManagerService rulesManagerService =
     43                 LocalServices.getService(RulesManagerService.class);
     44 
     45         Slog.d(TAG, "onStartJob() called");
     46 
     47         // Note: notifyIdle() explicitly handles canceling / re-scheduling so no need to reschedule
     48         // here.
     49         rulesManagerService.notifyIdle();
     50 
     51         // Everything is handled synchronously. We are done.
     52         return false;
     53     }
     54 
     55     @Override
     56     public boolean onStopJob(JobParameters params) {
     57         // Reschedule if stopped unless it was cancelled due to unschedule().
     58         boolean reschedule = params.getStopReason() != JobParameters.REASON_CANCELED;
     59         Slog.d(TAG, "onStopJob() called: Reschedule=" + reschedule);
     60         return reschedule;
     61     }
     62 
     63     /**
     64      * Schedules the TimeZoneUpdateIdler job service to run once.
     65      *
     66      * @param context Context to use to get a job scheduler.
     67      */
     68     public static void schedule(Context context, long minimumDelayMillis) {
     69         // Request that the JobScheduler tell us when the device falls idle.
     70         JobScheduler jobScheduler =
     71                 (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
     72 
     73         // The TimeZoneUpdateIdler will send an intent that will trigger the Receiver.
     74         ComponentName idlerJobServiceName =
     75                 new ComponentName(context, TimeZoneUpdateIdler.class);
     76 
     77         // We require the device is idle, but also that it is charging to be as non-invasive as
     78         // we can.
     79         JobInfo.Builder jobInfoBuilder =
     80                 new JobInfo.Builder(TIME_ZONE_UPDATE_IDLE_JOB_ID, idlerJobServiceName)
     81                         .setRequiresDeviceIdle(true)
     82                         .setRequiresCharging(true)
     83                         .setMinimumLatency(minimumDelayMillis);
     84 
     85         Slog.d(TAG, "schedule() called: minimumDelayMillis=" + minimumDelayMillis);
     86         jobScheduler.schedule(jobInfoBuilder.build());
     87     }
     88 
     89     /**
     90      * Unschedules the TimeZoneUpdateIdler job service.
     91      *
     92      * @param context Context to use to get a job scheduler.
     93      */
     94     public static void unschedule(Context context) {
     95         JobScheduler jobScheduler =
     96                 (JobScheduler) context.getSystemService(Context.JOB_SCHEDULER_SERVICE);
     97         Slog.d(TAG, "unschedule() called");
     98         jobScheduler.cancel(TIME_ZONE_UPDATE_IDLE_JOB_ID);
     99     }
    100 }
    101