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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.job.controllers;
     18 
     19 import static com.android.server.job.JobSchedulerService.sElapsedRealtimeClock;
     20 
     21 import android.app.AlarmManager;
     22 import android.content.BroadcastReceiver;
     23 import android.content.Context;
     24 import android.content.Intent;
     25 import android.content.IntentFilter;
     26 import android.os.UserHandle;
     27 import android.util.ArraySet;
     28 import android.util.Log;
     29 import android.util.Slog;
     30 import android.util.proto.ProtoOutputStream;
     31 
     32 import com.android.internal.util.IndentingPrintWriter;
     33 import com.android.server.am.ActivityManagerService;
     34 import com.android.server.job.JobSchedulerService;
     35 import com.android.server.job.StateControllerProto;
     36 
     37 import java.util.function.Predicate;
     38 
     39 public final class IdleController extends StateController {
     40     private static final String TAG = "JobScheduler.Idle";
     41     private static final boolean DEBUG = JobSchedulerService.DEBUG
     42             || Log.isLoggable(TAG, Log.DEBUG);
     43 
     44     // Policy: we decide that we're "idle" if the device has been unused /
     45     // screen off or dreaming or wireless charging dock idle for at least this long
     46     private long mInactivityIdleThreshold;
     47     private long mIdleWindowSlop;
     48     final ArraySet<JobStatus> mTrackedTasks = new ArraySet<>();
     49     IdlenessTracker mIdleTracker;
     50 
     51     public IdleController(JobSchedulerService service) {
     52         super(service);
     53         initIdleStateTracking();
     54     }
     55 
     56     /**
     57      * StateController interface
     58      */
     59     @Override
     60     public void maybeStartTrackingJobLocked(JobStatus taskStatus, JobStatus lastJob) {
     61         if (taskStatus.hasIdleConstraint()) {
     62             mTrackedTasks.add(taskStatus);
     63             taskStatus.setTrackingController(JobStatus.TRACKING_IDLE);
     64             taskStatus.setIdleConstraintSatisfied(mIdleTracker.isIdle());
     65         }
     66     }
     67 
     68     @Override
     69     public void maybeStopTrackingJobLocked(JobStatus taskStatus, JobStatus incomingJob,
     70             boolean forUpdate) {
     71         if (taskStatus.clearTrackingController(JobStatus.TRACKING_IDLE)) {
     72             mTrackedTasks.remove(taskStatus);
     73         }
     74     }
     75 
     76     /**
     77      * Interaction with the task manager service
     78      */
     79     void reportNewIdleState(boolean isIdle) {
     80         synchronized (mLock) {
     81             for (int i = mTrackedTasks.size()-1; i >= 0; i--) {
     82                 mTrackedTasks.valueAt(i).setIdleConstraintSatisfied(isIdle);
     83             }
     84         }
     85         mStateChangedListener.onControllerStateChanged();
     86     }
     87 
     88     /**
     89      * Idle state tracking, and messaging with the task manager when
     90      * significant state changes occur
     91      */
     92     private void initIdleStateTracking() {
     93         mInactivityIdleThreshold = mContext.getResources().getInteger(
     94                 com.android.internal.R.integer.config_jobSchedulerInactivityIdleThreshold);
     95         mIdleWindowSlop = mContext.getResources().getInteger(
     96                 com.android.internal.R.integer.config_jobSchedulerIdleWindowSlop);
     97         mIdleTracker = new IdlenessTracker();
     98         mIdleTracker.startTracking();
     99     }
    100 
    101     final class IdlenessTracker extends BroadcastReceiver {
    102         private AlarmManager mAlarm;
    103 
    104         // After construction, mutations of idle/screen-on state will only happen
    105         // on the main looper thread, either in onReceive() or in an alarm callback.
    106         private boolean mIdle;
    107         private boolean mScreenOn;
    108         private boolean mDockIdle;
    109 
    110         private AlarmManager.OnAlarmListener mIdleAlarmListener = () -> {
    111             handleIdleTrigger();
    112         };
    113 
    114         public IdlenessTracker() {
    115             mAlarm = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);
    116 
    117             // At boot we presume that the user has just "interacted" with the
    118             // device in some meaningful way.
    119             mIdle = false;
    120             mScreenOn = true;
    121             mDockIdle = false;
    122         }
    123 
    124         public boolean isIdle() {
    125             return mIdle;
    126         }
    127 
    128         public void startTracking() {
    129             IntentFilter filter = new IntentFilter();
    130 
    131             // Screen state
    132             filter.addAction(Intent.ACTION_SCREEN_ON);
    133             filter.addAction(Intent.ACTION_SCREEN_OFF);
    134 
    135             // Dreaming state
    136             filter.addAction(Intent.ACTION_DREAMING_STARTED);
    137             filter.addAction(Intent.ACTION_DREAMING_STOPPED);
    138 
    139             // Debugging/instrumentation
    140             filter.addAction(ActivityManagerService.ACTION_TRIGGER_IDLE);
    141 
    142             // Wireless charging dock state
    143             filter.addAction(Intent.ACTION_DOCK_IDLE);
    144             filter.addAction(Intent.ACTION_DOCK_ACTIVE);
    145 
    146             mContext.registerReceiver(this, filter);
    147         }
    148 
    149         @Override
    150         public void onReceive(Context context, Intent intent) {
    151             final String action = intent.getAction();
    152             if (action.equals(Intent.ACTION_SCREEN_ON)
    153                     || action.equals(Intent.ACTION_DREAMING_STOPPED)
    154                     || action.equals(Intent.ACTION_DOCK_ACTIVE)) {
    155                 if (action.equals(Intent.ACTION_DOCK_ACTIVE)) {
    156                     if (!mScreenOn) {
    157                         // Ignore this intent during screen off
    158                         return;
    159                     } else {
    160                         mDockIdle = false;
    161                     }
    162                 } else {
    163                     mScreenOn = true;
    164                     mDockIdle = false;
    165                 }
    166                 if (DEBUG) {
    167                     Slog.v(TAG,"exiting idle : " + action);
    168                 }
    169                 //cancel the alarm
    170                 mAlarm.cancel(mIdleAlarmListener);
    171                 if (mIdle) {
    172                 // possible transition to not-idle
    173                     mIdle = false;
    174                     reportNewIdleState(mIdle);
    175                 }
    176             } else if (action.equals(Intent.ACTION_SCREEN_OFF)
    177                     || action.equals(Intent.ACTION_DREAMING_STARTED)
    178                     || action.equals(Intent.ACTION_DOCK_IDLE)) {
    179                 // when the screen goes off or dreaming starts or wireless charging dock in idle,
    180                 // we schedule the alarm that will tell us when we have decided the device is
    181                 // truly idle.
    182                 if (action.equals(Intent.ACTION_DOCK_IDLE)) {
    183                     if (!mScreenOn) {
    184                         // Ignore this intent during screen off
    185                         return;
    186                     } else {
    187                         mDockIdle = true;
    188                     }
    189                 } else {
    190                     mScreenOn = false;
    191                     mDockIdle = false;
    192                 }
    193                 final long nowElapsed = sElapsedRealtimeClock.millis();
    194                 final long when = nowElapsed + mInactivityIdleThreshold;
    195                 if (DEBUG) {
    196                     Slog.v(TAG, "Scheduling idle : " + action + " now:" + nowElapsed + " when="
    197                             + when);
    198                 }
    199                 mAlarm.setWindow(AlarmManager.ELAPSED_REALTIME_WAKEUP,
    200                         when, mIdleWindowSlop, "JS idleness", mIdleAlarmListener, null);
    201             } else if (action.equals(ActivityManagerService.ACTION_TRIGGER_IDLE)) {
    202                 handleIdleTrigger();
    203             }
    204         }
    205 
    206         private void handleIdleTrigger() {
    207             // idle time starts now. Do not set mIdle if screen is on.
    208             if (!mIdle && (!mScreenOn || mDockIdle)) {
    209                 if (DEBUG) {
    210                     Slog.v(TAG, "Idle trigger fired @ " + sElapsedRealtimeClock.millis());
    211                 }
    212                 mIdle = true;
    213                 reportNewIdleState(mIdle);
    214             } else {
    215                 if (DEBUG) {
    216                     Slog.v(TAG, "TRIGGER_IDLE received but not changing state; idle="
    217                             + mIdle + " screen=" + mScreenOn);
    218                 }
    219             }
    220         }
    221     }
    222 
    223     @Override
    224     public void dumpControllerStateLocked(IndentingPrintWriter pw,
    225             Predicate<JobStatus> predicate) {
    226         pw.println("Currently idle: " + mIdleTracker.isIdle());
    227         pw.println();
    228 
    229         for (int i = 0; i < mTrackedTasks.size(); i++) {
    230             final JobStatus js = mTrackedTasks.valueAt(i);
    231             if (!predicate.test(js)) {
    232                 continue;
    233             }
    234             pw.print("#");
    235             js.printUniqueId(pw);
    236             pw.print(" from ");
    237             UserHandle.formatUid(pw, js.getSourceUid());
    238             pw.println();
    239         }
    240     }
    241 
    242     @Override
    243     public void dumpControllerStateLocked(ProtoOutputStream proto, long fieldId,
    244             Predicate<JobStatus> predicate) {
    245         final long token = proto.start(fieldId);
    246         final long mToken = proto.start(StateControllerProto.IDLE);
    247 
    248         proto.write(StateControllerProto.IdleController.IS_IDLE, mIdleTracker.isIdle());
    249 
    250         for (int i = 0; i < mTrackedTasks.size(); i++) {
    251             final JobStatus js = mTrackedTasks.valueAt(i);
    252             if (!predicate.test(js)) {
    253                 continue;
    254             }
    255             final long jsToken = proto.start(StateControllerProto.IdleController.TRACKED_JOBS);
    256             js.writeToShortProto(proto, StateControllerProto.IdleController.TrackedJob.INFO);
    257             proto.write(StateControllerProto.IdleController.TrackedJob.SOURCE_UID,
    258                     js.getSourceUid());
    259             proto.end(jsToken);
    260         }
    261 
    262         proto.end(mToken);
    263         proto.end(token);
    264     }
    265 }
    266