| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License |
| */ |
| |
| package com.android.server.job.controllers; |
| |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| |
| import android.app.AlarmManager; |
| import android.app.PendingIntent; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.os.SystemClock; |
| import android.util.Slog; |
| |
| import com.android.server.job.JobSchedulerService; |
| import com.android.server.job.StateChangedListener; |
| |
| public class IdleController extends StateController { |
| private static final String TAG = "IdleController"; |
| |
| // Policy: we decide that we're "idle" if the device has been unused / |
| // screen off or dreaming for at least this long |
| private static final long INACTIVITY_IDLE_THRESHOLD = 71 * 60 * 1000; // millis; 71 min |
| private static final long IDLE_WINDOW_SLOP = 5 * 60 * 1000; // 5 minute window, to be nice |
| |
| private static final String ACTION_TRIGGER_IDLE = |
| "com.android.server.task.controllers.IdleController.ACTION_TRIGGER_IDLE"; |
| |
| final ArrayList<JobStatus> mTrackedTasks = new ArrayList<JobStatus>(); |
| IdlenessTracker mIdleTracker; |
| |
| // Singleton factory |
| private static Object sCreationLock = new Object(); |
| private static volatile IdleController sController; |
| |
| public static IdleController get(JobSchedulerService service) { |
| synchronized (sCreationLock) { |
| if (sController == null) { |
| sController = new IdleController(service, service.getContext()); |
| } |
| return sController; |
| } |
| } |
| |
| private IdleController(StateChangedListener stateChangedListener, Context context) { |
| super(stateChangedListener, context); |
| initIdleStateTracking(); |
| } |
| |
| /** |
| * StateController interface |
| */ |
| @Override |
| public void maybeStartTrackingJob(JobStatus taskStatus) { |
| if (taskStatus.hasIdleConstraint()) { |
| synchronized (mTrackedTasks) { |
| mTrackedTasks.add(taskStatus); |
| taskStatus.idleConstraintSatisfied.set(mIdleTracker.isIdle()); |
| } |
| } |
| } |
| |
| @Override |
| public void maybeStopTrackingJob(JobStatus taskStatus) { |
| synchronized (mTrackedTasks) { |
| mTrackedTasks.remove(taskStatus); |
| } |
| } |
| |
| /** |
| * Interaction with the task manager service |
| */ |
| void reportNewIdleState(boolean isIdle) { |
| synchronized (mTrackedTasks) { |
| for (JobStatus task : mTrackedTasks) { |
| task.idleConstraintSatisfied.set(isIdle); |
| } |
| } |
| mStateChangedListener.onControllerStateChanged(); |
| } |
| |
| /** |
| * Idle state tracking, and messaging with the task manager when |
| * significant state changes occur |
| */ |
| private void initIdleStateTracking() { |
| mIdleTracker = new IdlenessTracker(); |
| mIdleTracker.startTracking(); |
| } |
| |
| class IdlenessTracker extends BroadcastReceiver { |
| private AlarmManager mAlarm; |
| private PendingIntent mIdleTriggerIntent; |
| boolean mIdle; |
| |
| public IdlenessTracker() { |
| mAlarm = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE); |
| |
| Intent intent = new Intent(ACTION_TRIGGER_IDLE) |
| .setPackage("android") |
| .setFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); |
| mIdleTriggerIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); |
| |
| // At boot we presume that the user has just "interacted" with the |
| // device in some meaningful way. |
| mIdle = false; |
| } |
| |
| public boolean isIdle() { |
| return mIdle; |
| } |
| |
| public void startTracking() { |
| IntentFilter filter = new IntentFilter(); |
| |
| // Screen state |
| filter.addAction(Intent.ACTION_SCREEN_ON); |
| filter.addAction(Intent.ACTION_SCREEN_OFF); |
| |
| // Dreaming state |
| filter.addAction(Intent.ACTION_DREAMING_STARTED); |
| filter.addAction(Intent.ACTION_DREAMING_STOPPED); |
| |
| // Debugging/instrumentation |
| filter.addAction(ACTION_TRIGGER_IDLE); |
| |
| mContext.registerReceiver(this, filter); |
| } |
| |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| final String action = intent.getAction(); |
| |
| if (action.equals(Intent.ACTION_SCREEN_ON) |
| || action.equals(Intent.ACTION_DREAMING_STOPPED)) { |
| // possible transition to not-idle |
| if (mIdle) { |
| if (DEBUG) { |
| Slog.v(TAG, "exiting idle : " + action); |
| } |
| mAlarm.cancel(mIdleTriggerIntent); |
| mIdle = false; |
| reportNewIdleState(mIdle); |
| } |
| } else if (action.equals(Intent.ACTION_SCREEN_OFF) |
| || action.equals(Intent.ACTION_DREAMING_STARTED)) { |
| // when the screen goes off or dreaming starts, we schedule the |
| // alarm that will tell us when we have decided the device is |
| // truly idle. |
| final long nowElapsed = SystemClock.elapsedRealtime(); |
| final long when = nowElapsed + INACTIVITY_IDLE_THRESHOLD; |
| if (DEBUG) { |
| Slog.v(TAG, "Scheduling idle : " + action + " now:" + nowElapsed + " when=" |
| + when); |
| } |
| mAlarm.setWindow(AlarmManager.ELAPSED_REALTIME_WAKEUP, |
| when, IDLE_WINDOW_SLOP, mIdleTriggerIntent); |
| } else if (action.equals(ACTION_TRIGGER_IDLE)) { |
| // idle time starts now |
| if (!mIdle) { |
| if (DEBUG) { |
| Slog.v(TAG, "Idle trigger fired @ " + SystemClock.elapsedRealtime()); |
| } |
| mIdle = true; |
| reportNewIdleState(mIdle); |
| } |
| } |
| } |
| } |
| |
| @Override |
| public void dumpControllerState(PrintWriter pw) { |
| synchronized (mTrackedTasks) { |
| pw.print("Idle: "); |
| pw.println(mIdleTracker.isIdle() ? "true" : "false"); |
| pw.println(mTrackedTasks.size()); |
| for (int i = 0; i < mTrackedTasks.size(); i++) { |
| final JobStatus js = mTrackedTasks.get(i); |
| pw.print(" "); |
| pw.print(String.valueOf(js.hashCode()).substring(0, 3)); |
| pw.println(".."); |
| } |
| } |
| } |
| } |