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.job.controllers; 18 19import java.io.PrintWriter; 20import java.util.ArrayList; 21 22import android.app.AlarmManager; 23import android.app.PendingIntent; 24import android.content.BroadcastReceiver; 25import android.content.Context; 26import android.content.Intent; 27import android.content.IntentFilter; 28import android.os.SystemClock; 29import android.os.UserHandle; 30import android.util.Slog; 31 32import com.android.server.am.ActivityManagerService; 33import com.android.server.job.JobSchedulerService; 34import com.android.server.job.StateChangedListener; 35 36public class IdleController extends StateController { 37 private static final String TAG = "IdleController"; 38 39 // Policy: we decide that we're "idle" if the device has been unused / 40 // screen off or dreaming for at least this long 41 private long mInactivityIdleThreshold; 42 private long mIdleWindowSlop; 43 final ArrayList<JobStatus> mTrackedTasks = new ArrayList<JobStatus>(); 44 IdlenessTracker mIdleTracker; 45 46 // Singleton factory 47 private static Object sCreationLock = new Object(); 48 private static volatile IdleController sController; 49 50 public static IdleController get(JobSchedulerService service) { 51 synchronized (sCreationLock) { 52 if (sController == null) { 53 sController = new IdleController(service, service.getContext(), service.getLock()); 54 } 55 return sController; 56 } 57 } 58 59 private IdleController(StateChangedListener stateChangedListener, Context context, 60 Object lock) { 61 super(stateChangedListener, context, lock); 62 initIdleStateTracking(); 63 } 64 65 /** 66 * StateController interface 67 */ 68 @Override 69 public void maybeStartTrackingJobLocked(JobStatus taskStatus, JobStatus lastJob) { 70 if (taskStatus.hasIdleConstraint()) { 71 mTrackedTasks.add(taskStatus); 72 taskStatus.setIdleConstraintSatisfied(mIdleTracker.isIdle()); 73 } 74 } 75 76 @Override 77 public void maybeStopTrackingJobLocked(JobStatus taskStatus, JobStatus incomingJob, boolean forUpdate) { 78 mTrackedTasks.remove(taskStatus); 79 } 80 81 /** 82 * Interaction with the task manager service 83 */ 84 void reportNewIdleState(boolean isIdle) { 85 synchronized (mLock) { 86 for (JobStatus task : mTrackedTasks) { 87 task.setIdleConstraintSatisfied(isIdle); 88 } 89 } 90 mStateChangedListener.onControllerStateChanged(); 91 } 92 93 /** 94 * Idle state tracking, and messaging with the task manager when 95 * significant state changes occur 96 */ 97 private void initIdleStateTracking() { 98 mInactivityIdleThreshold = mContext.getResources().getInteger( 99 com.android.internal.R.integer.config_jobSchedulerInactivityIdleThreshold); 100 mIdleWindowSlop = mContext.getResources().getInteger( 101 com.android.internal.R.integer.config_jobSchedulerIdleWindowSlop); 102 mIdleTracker = new IdlenessTracker(); 103 mIdleTracker.startTracking(); 104 } 105 106 class IdlenessTracker extends BroadcastReceiver { 107 private AlarmManager mAlarm; 108 private PendingIntent mIdleTriggerIntent; 109 boolean mIdle; 110 boolean mScreenOn; 111 112 public IdlenessTracker() { 113 mAlarm = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE); 114 115 Intent intent = new Intent(ActivityManagerService.ACTION_TRIGGER_IDLE) 116 .setPackage("android") 117 .setFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 118 mIdleTriggerIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 119 120 // At boot we presume that the user has just "interacted" with the 121 // device in some meaningful way. 122 mIdle = false; 123 mScreenOn = true; 124 } 125 126 public boolean isIdle() { 127 return mIdle; 128 } 129 130 public void startTracking() { 131 IntentFilter filter = new IntentFilter(); 132 133 // Screen state 134 filter.addAction(Intent.ACTION_SCREEN_ON); 135 filter.addAction(Intent.ACTION_SCREEN_OFF); 136 137 // Dreaming state 138 filter.addAction(Intent.ACTION_DREAMING_STARTED); 139 filter.addAction(Intent.ACTION_DREAMING_STOPPED); 140 141 // Debugging/instrumentation 142 filter.addAction(ActivityManagerService.ACTION_TRIGGER_IDLE); 143 144 mContext.registerReceiver(this, filter); 145 } 146 147 @Override 148 public void onReceive(Context context, Intent intent) { 149 final String action = intent.getAction(); 150 151 if (action.equals(Intent.ACTION_SCREEN_ON) 152 || action.equals(Intent.ACTION_DREAMING_STOPPED)) { 153 if (DEBUG) { 154 Slog.v(TAG,"exiting idle : " + action); 155 } 156 mScreenOn = true; 157 //cancel the alarm 158 mAlarm.cancel(mIdleTriggerIntent); 159 if (mIdle) { 160 // possible transition to not-idle 161 mIdle = false; 162 reportNewIdleState(mIdle); 163 } 164 } else if (action.equals(Intent.ACTION_SCREEN_OFF) 165 || action.equals(Intent.ACTION_DREAMING_STARTED)) { 166 // when the screen goes off or dreaming starts, we schedule the 167 // alarm that will tell us when we have decided the device is 168 // truly idle. 169 final long nowElapsed = SystemClock.elapsedRealtime(); 170 final long when = nowElapsed + mInactivityIdleThreshold; 171 if (DEBUG) { 172 Slog.v(TAG, "Scheduling idle : " + action + " now:" + nowElapsed + " when=" 173 + when); 174 } 175 mScreenOn = false; 176 mAlarm.setWindow(AlarmManager.ELAPSED_REALTIME_WAKEUP, 177 when, mIdleWindowSlop, mIdleTriggerIntent); 178 } else if (action.equals(ActivityManagerService.ACTION_TRIGGER_IDLE)) { 179 // idle time starts now. Do not set mIdle if screen is on. 180 if (!mIdle && !mScreenOn) { 181 if (DEBUG) { 182 Slog.v(TAG, "Idle trigger fired @ " + SystemClock.elapsedRealtime()); 183 } 184 mIdle = true; 185 reportNewIdleState(mIdle); 186 } 187 } 188 } 189 } 190 191 @Override 192 public void dumpControllerStateLocked(PrintWriter pw, int filterUid) { 193 pw.print("Idle: "); 194 pw.println(mIdleTracker.isIdle() ? "true" : "false"); 195 pw.print("Tracking "); 196 pw.print(mTrackedTasks.size()); 197 pw.println(":"); 198 for (int i = 0; i < mTrackedTasks.size(); i++) { 199 final JobStatus js = mTrackedTasks.get(i); 200 if (!js.shouldDump(filterUid)) { 201 continue; 202 } 203 pw.print(" #"); 204 js.printUniqueId(pw); 205 pw.print(" from "); 206 UserHandle.formatUid(pw, js.getSourceUid()); 207 pw.println(); 208 } 209 } 210} 211