| /* |
| * 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.task; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import android.app.task.ITaskManager; |
| import android.app.task.Task; |
| import android.app.task.TaskManager; |
| import android.content.BroadcastReceiver; |
| import android.app.task.TaskService; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.pm.PackageManager; |
| import android.content.pm.PackageManager.NameNotFoundException; |
| import android.content.pm.ServiceInfo; |
| import android.os.Binder; |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.RemoteException; |
| import android.os.SystemClock; |
| import android.os.UserHandle; |
| import android.util.Slog; |
| import android.util.SparseArray; |
| |
| import com.android.server.task.controllers.BatteryController; |
| import com.android.server.task.controllers.ConnectivityController; |
| import com.android.server.task.controllers.IdleController; |
| import com.android.server.task.controllers.StateController; |
| import com.android.server.task.controllers.TaskStatus; |
| import com.android.server.task.controllers.TimeController; |
| |
| import java.util.LinkedList; |
| |
| /** |
| * Responsible for taking tasks representing work to be performed by a client app, and determining |
| * based on the criteria specified when that task should be run against the client application's |
| * endpoint. |
| * Implements logic for scheduling, and rescheduling tasks. The TaskManagerService knows nothing |
| * about constraints, or the state of active tasks. It receives callbacks from the various |
| * controllers and completed tasks and operates accordingly. |
| * |
| * Note on locking: Any operations that manipulate {@link #mTasks} need to lock on that object. |
| * Any function with the suffix 'Locked' also needs to lock on {@link #mTasks}. |
| * @hide |
| */ |
| public class TaskManagerService extends com.android.server.SystemService |
| implements StateChangedListener, TaskCompletedListener, TaskMapReadFinishedListener { |
| // TODO: Switch this off for final version. |
| static final boolean DEBUG = true; |
| /** The number of concurrent tasks we run at one time. */ |
| private static final int MAX_TASK_CONTEXTS_COUNT = 3; |
| static final String TAG = "TaskManager"; |
| /** Master list of tasks. */ |
| private final TaskStore mTasks; |
| |
| static final int MSG_TASK_EXPIRED = 0; |
| static final int MSG_CHECK_TASKS = 1; |
| |
| // Policy constants |
| /** |
| * Minimum # of idle tasks that must be ready in order to force the TM to schedule things |
| * early. |
| */ |
| private static final int MIN_IDLE_COUNT = 1; |
| /** |
| * Minimum # of connectivity tasks that must be ready in order to force the TM to schedule |
| * things early. |
| */ |
| private static final int MIN_CONNECTIVITY_COUNT = 2; |
| /** |
| * Minimum # of tasks (with no particular constraints) for which the TM will be happy running |
| * some work early. |
| */ |
| private static final int MIN_READY_TASKS_COUNT = 4; |
| |
| /** |
| * Track Services that have currently active or pending tasks. The index is provided by |
| * {@link TaskStatus#getServiceToken()} |
| */ |
| private final List<TaskServiceContext> mActiveServices = new LinkedList<TaskServiceContext>(); |
| /** List of controllers that will notify this service of updates to tasks. */ |
| private List<StateController> mControllers; |
| /** |
| * Queue of pending tasks. The TaskServiceContext class will receive tasks from this list |
| * when ready to execute them. |
| */ |
| private final LinkedList<TaskStatus> mPendingTasks = new LinkedList<TaskStatus>(); |
| |
| private final TaskHandler mHandler; |
| private final TaskManagerStub mTaskManagerStub; |
| /** |
| * Cleans up outstanding jobs when a package is removed. Even if it's being replaced later we |
| * still clean up. On reinstall the package will have a new uid. |
| */ |
| private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| Slog.d(TAG, "Receieved: " + intent.getAction()); |
| if (Intent.ACTION_PACKAGE_REMOVED.equals(intent.getAction())) { |
| int uidRemoved = intent.getIntExtra(Intent.EXTRA_UID, -1); |
| if (DEBUG) { |
| Slog.d(TAG, "Removing jobs for uid: " + uidRemoved); |
| } |
| cancelTasksForUid(uidRemoved); |
| } else if (Intent.ACTION_USER_REMOVED.equals(intent.getAction())) { |
| final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0); |
| if (DEBUG) { |
| Slog.d(TAG, "Removing jobs for user: " + userId); |
| } |
| cancelTasksForUser(userId); |
| } |
| } |
| }; |
| |
| /** |
| * Entry point from client to schedule the provided task. |
| * This cancels the task if it's already been scheduled, and replaces it with the one provided. |
| * @param task Task object containing execution parameters |
| * @param uId The package identifier of the application this task is for. |
| * @param canPersistTask Whether or not the client has the appropriate permissions for |
| * persisting this task. |
| * @return Result of this operation. See <code>TaskManager#RESULT_*</code> return codes. |
| */ |
| public int schedule(Task task, int uId, boolean canPersistTask) { |
| TaskStatus taskStatus = new TaskStatus(task, uId, canPersistTask); |
| cancelTask(uId, task.getId()); |
| startTrackingTask(taskStatus); |
| return TaskManager.RESULT_SUCCESS; |
| } |
| |
| public List<Task> getPendingTasks(int uid) { |
| ArrayList<Task> outList = new ArrayList<Task>(); |
| synchronized (mTasks) { |
| for (TaskStatus ts : mTasks.getTasks()) { |
| if (ts.getUid() == uid) { |
| outList.add(ts.getTask()); |
| } |
| } |
| } |
| return outList; |
| } |
| |
| private void cancelTasksForUser(int userHandle) { |
| synchronized (mTasks) { |
| List<TaskStatus> tasksForUser = mTasks.getTasksByUser(userHandle); |
| for (TaskStatus toRemove : tasksForUser) { |
| if (DEBUG) { |
| Slog.d(TAG, "Cancelling: " + toRemove); |
| } |
| cancelTaskLocked(toRemove); |
| } |
| } |
| } |
| |
| /** |
| * Entry point from client to cancel all tasks originating from their uid. |
| * This will remove the task from the master list, and cancel the task if it was staged for |
| * execution or being executed. |
| * @param uid To check against for removal of a task. |
| */ |
| public void cancelTasksForUid(int uid) { |
| // Remove from master list. |
| synchronized (mTasks) { |
| List<TaskStatus> tasksForUid = mTasks.getTasksByUid(uid); |
| for (TaskStatus toRemove : tasksForUid) { |
| if (DEBUG) { |
| Slog.d(TAG, "Cancelling: " + toRemove); |
| } |
| cancelTaskLocked(toRemove); |
| } |
| } |
| } |
| |
| /** |
| * Entry point from client to cancel the task corresponding to the taskId provided. |
| * This will remove the task from the master list, and cancel the task if it was staged for |
| * execution or being executed. |
| * @param uid Uid of the calling client. |
| * @param taskId Id of the task, provided at schedule-time. |
| */ |
| public void cancelTask(int uid, int taskId) { |
| TaskStatus toCancel; |
| synchronized (mTasks) { |
| toCancel = mTasks.getTaskByUidAndTaskId(uid, taskId); |
| if (toCancel != null) { |
| cancelTaskLocked(toCancel); |
| } |
| } |
| } |
| |
| private void cancelTaskLocked(TaskStatus cancelled) { |
| // Remove from store. |
| stopTrackingTask(cancelled); |
| // Remove from pending queue. |
| mPendingTasks.remove(cancelled); |
| // Cancel if running. |
| stopTaskOnServiceContextLocked(cancelled); |
| } |
| |
| /** |
| * Initializes the system service. |
| * <p> |
| * Subclasses must define a single argument constructor that accepts the context |
| * and passes it to super. |
| * </p> |
| * |
| * @param context The system server context. |
| */ |
| public TaskManagerService(Context context) { |
| super(context); |
| // Create the controllers. |
| mControllers = new LinkedList<StateController>(); |
| mControllers.add(ConnectivityController.get(this)); |
| mControllers.add(TimeController.get(this)); |
| mControllers.add(IdleController.get(this)); |
| mControllers.add(BatteryController.get(this)); |
| |
| mHandler = new TaskHandler(context.getMainLooper()); |
| mTaskManagerStub = new TaskManagerStub(); |
| // Create the "runners". |
| for (int i = 0; i < MAX_TASK_CONTEXTS_COUNT; i++) { |
| mActiveServices.add( |
| new TaskServiceContext(this, context.getMainLooper())); |
| } |
| mTasks = TaskStore.initAndGet(this); |
| } |
| |
| @Override |
| public void onStart() { |
| publishBinderService(Context.TASK_SERVICE, mTaskManagerStub); |
| } |
| |
| @Override |
| public void onBootPhase(int phase) { |
| if (PHASE_SYSTEM_SERVICES_READY == phase) { |
| // Register br for package removals and user removals. |
| final IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_REMOVED); |
| filter.addDataScheme("package"); |
| getContext().registerReceiverAsUser( |
| mBroadcastReceiver, UserHandle.ALL, filter, null, null); |
| final IntentFilter userFilter = new IntentFilter(Intent.ACTION_USER_REMOVED); |
| getContext().registerReceiverAsUser( |
| mBroadcastReceiver, UserHandle.ALL, userFilter, null, null); |
| } |
| } |
| |
| /** |
| * Called when we have a task status object that we need to insert in our |
| * {@link com.android.server.task.TaskStore}, and make sure all the relevant controllers know |
| * about. |
| */ |
| private void startTrackingTask(TaskStatus taskStatus) { |
| boolean update; |
| synchronized (mTasks) { |
| update = mTasks.add(taskStatus); |
| } |
| for (StateController controller : mControllers) { |
| if (update) { |
| controller.maybeStopTrackingTask(taskStatus); |
| } |
| controller.maybeStartTrackingTask(taskStatus); |
| } |
| } |
| |
| /** |
| * Called when we want to remove a TaskStatus object that we've finished executing. Returns the |
| * object removed. |
| */ |
| private boolean stopTrackingTask(TaskStatus taskStatus) { |
| boolean removed; |
| synchronized (mTasks) { |
| // Remove from store as well as controllers. |
| removed = mTasks.remove(taskStatus); |
| } |
| if (removed) { |
| for (StateController controller : mControllers) { |
| controller.maybeStopTrackingTask(taskStatus); |
| } |
| } |
| return removed; |
| } |
| |
| private boolean stopTaskOnServiceContextLocked(TaskStatus ts) { |
| for (TaskServiceContext tsc : mActiveServices) { |
| final TaskStatus executing = tsc.getRunningTask(); |
| if (executing != null && executing.matches(ts.getUid(), ts.getTaskId())) { |
| tsc.cancelExecutingTask(); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * @param ts TaskStatus we are querying against. |
| * @return Whether or not the task represented by the status object is currently being run or |
| * is pending. |
| */ |
| private boolean isCurrentlyActiveLocked(TaskStatus ts) { |
| for (TaskServiceContext serviceContext : mActiveServices) { |
| final TaskStatus running = serviceContext.getRunningTask(); |
| if (running != null && running.matches(ts.getUid(), ts.getTaskId())) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * A task is rescheduled with exponential back-off if the client requests this from their |
| * execution logic. |
| * A caveat is for idle-mode tasks, for which the idle-mode constraint will usurp the |
| * timeliness of the reschedule. For an idle-mode task, no deadline is given. |
| * @param failureToReschedule Provided task status that we will reschedule. |
| * @return A newly instantiated TaskStatus with the same constraints as the last task except |
| * with adjusted timing constraints. |
| */ |
| private TaskStatus getRescheduleTaskForFailure(TaskStatus failureToReschedule) { |
| final long elapsedNowMillis = SystemClock.elapsedRealtime(); |
| final Task task = failureToReschedule.getTask(); |
| |
| final long initialBackoffMillis = task.getInitialBackoffMillis(); |
| final int backoffAttempt = failureToReschedule.getNumFailures() + 1; |
| long newEarliestRuntimeElapsed = elapsedNowMillis; |
| |
| switch (task.getBackoffPolicy()) { |
| case Task.BackoffPolicy.LINEAR: |
| newEarliestRuntimeElapsed += initialBackoffMillis * backoffAttempt; |
| break; |
| default: |
| if (DEBUG) { |
| Slog.v(TAG, "Unrecognised back-off policy, defaulting to exponential."); |
| } |
| case Task.BackoffPolicy.EXPONENTIAL: |
| newEarliestRuntimeElapsed += |
| Math.pow(initialBackoffMillis * 0.001, backoffAttempt) * 1000; |
| break; |
| } |
| newEarliestRuntimeElapsed = |
| Math.min(newEarliestRuntimeElapsed, Task.MAX_BACKOFF_DELAY_MILLIS); |
| return new TaskStatus(failureToReschedule, newEarliestRuntimeElapsed, |
| TaskStatus.NO_LATEST_RUNTIME, backoffAttempt); |
| } |
| |
| /** |
| * Called after a periodic has executed so we can to re-add it. We take the last execution time |
| * of the task to be the time of completion (i.e. the time at which this function is called). |
| * This could be inaccurate b/c the task can run for as long as |
| * {@link com.android.server.task.TaskServiceContext#EXECUTING_TIMESLICE_MILLIS}, but will lead |
| * to underscheduling at least, rather than if we had taken the last execution time to be the |
| * start of the execution. |
| * @return A new task representing the execution criteria for this instantiation of the |
| * recurring task. |
| */ |
| private TaskStatus getRescheduleTaskForPeriodic(TaskStatus periodicToReschedule) { |
| final long elapsedNow = SystemClock.elapsedRealtime(); |
| // Compute how much of the period is remaining. |
| long runEarly = Math.max(periodicToReschedule.getLatestRunTimeElapsed() - elapsedNow, 0); |
| long newEarliestRunTimeElapsed = elapsedNow + runEarly; |
| long period = periodicToReschedule.getTask().getIntervalMillis(); |
| long newLatestRuntimeElapsed = newEarliestRunTimeElapsed + period; |
| |
| if (DEBUG) { |
| Slog.v(TAG, "Rescheduling executed periodic. New execution window [" + |
| newEarliestRunTimeElapsed/1000 + ", " + newLatestRuntimeElapsed/1000 + "]s"); |
| } |
| return new TaskStatus(periodicToReschedule, newEarliestRunTimeElapsed, |
| newLatestRuntimeElapsed, 0 /* backoffAttempt */); |
| } |
| |
| // TaskCompletedListener implementations. |
| |
| /** |
| * A task just finished executing. We fetch the |
| * {@link com.android.server.task.controllers.TaskStatus} from the store and depending on |
| * whether we want to reschedule we readd it to the controllers. |
| * @param taskStatus Completed task. |
| * @param needsReschedule Whether the implementing class should reschedule this task. |
| */ |
| @Override |
| public void onTaskCompleted(TaskStatus taskStatus, boolean needsReschedule) { |
| if (DEBUG) { |
| Slog.d(TAG, "Completed " + taskStatus + ", reschedule=" + needsReschedule); |
| } |
| if (!stopTrackingTask(taskStatus)) { |
| if (DEBUG) { |
| Slog.e(TAG, "Error removing task: could not find task to remove. Was task " + |
| "removed while executing?"); |
| } |
| return; |
| } |
| if (needsReschedule) { |
| TaskStatus rescheduled = getRescheduleTaskForFailure(taskStatus); |
| startTrackingTask(rescheduled); |
| } else if (taskStatus.getTask().isPeriodic()) { |
| TaskStatus rescheduledPeriodic = getRescheduleTaskForPeriodic(taskStatus); |
| startTrackingTask(rescheduledPeriodic); |
| } |
| mHandler.obtainMessage(MSG_CHECK_TASKS).sendToTarget(); |
| } |
| |
| // StateChangedListener implementations. |
| |
| /** |
| * Off-board work to our handler thread as quickly as possible, b/c this call is probably being |
| * made on the main thread. |
| * For now this takes the task and if it's ready to run it will run it. In future we might not |
| * provide the task, so that the StateChangedListener has to run through its list of tasks to |
| * see which are ready. This will further decouple the controllers from the execution logic. |
| */ |
| @Override |
| public void onControllerStateChanged() { |
| // Post a message to to run through the list of tasks and start/stop any that are eligible. |
| mHandler.obtainMessage(MSG_CHECK_TASKS).sendToTarget(); |
| } |
| |
| @Override |
| public void onRunTaskNow(TaskStatus taskStatus) { |
| mHandler.obtainMessage(MSG_TASK_EXPIRED, taskStatus).sendToTarget(); |
| } |
| |
| /** |
| * Disk I/O is finished, take the list of tasks we read from disk and add them to our |
| * {@link TaskStore}. |
| * This is run on the {@link com.android.server.IoThread} instance, which is a separate thread, |
| * and is called once at boot. |
| */ |
| @Override |
| public void onTaskMapReadFinished(List<TaskStatus> tasks) { |
| synchronized (mTasks) { |
| for (TaskStatus ts : tasks) { |
| if (mTasks.containsTaskIdForUid(ts.getTaskId(), ts.getUid())) { |
| // An app with BOOT_COMPLETED *might* have decided to reschedule their task, in |
| // the same amount of time it took us to read it from disk. If this is the case |
| // we leave it be. |
| continue; |
| } |
| startTrackingTask(ts); |
| } |
| } |
| } |
| |
| private class TaskHandler extends Handler { |
| |
| public TaskHandler(Looper looper) { |
| super(looper); |
| } |
| |
| @Override |
| public void handleMessage(Message message) { |
| switch (message.what) { |
| case MSG_TASK_EXPIRED: |
| synchronized (mTasks) { |
| TaskStatus runNow = (TaskStatus) message.obj; |
| if (!mPendingTasks.contains(runNow)) { |
| mPendingTasks.add(runNow); |
| } |
| } |
| queueReadyTasksForExecutionH(); |
| break; |
| case MSG_CHECK_TASKS: |
| // Check the list of tasks and run some of them if we feel inclined. |
| maybeQueueReadyTasksForExecutionH(); |
| break; |
| } |
| maybeRunPendingTasksH(); |
| // Don't remove TASK_EXPIRED in case one came along while processing the queue. |
| removeMessages(MSG_CHECK_TASKS); |
| } |
| |
| /** |
| * Run through list of tasks and execute all possible - at least one is expired so we do |
| * as many as we can. |
| */ |
| private void queueReadyTasksForExecutionH() { |
| synchronized (mTasks) { |
| for (TaskStatus ts : mTasks.getTasks()) { |
| if (isReadyToBeExecutedLocked(ts)) { |
| mPendingTasks.add(ts); |
| } else if (isReadyToBeCancelledLocked(ts)) { |
| stopTaskOnServiceContextLocked(ts); |
| } |
| } |
| } |
| } |
| |
| /** |
| * The state of at least one task has changed. Here is where we could enforce various |
| * policies on when we want to execute tasks. |
| * Right now the policy is such: |
| * If >1 of the ready tasks is idle mode we send all of them off |
| * if more than 2 network connectivity tasks are ready we send them all off. |
| * If more than 4 tasks total are ready we send them all off. |
| * TODO: It would be nice to consolidate these sort of high-level policies somewhere. |
| */ |
| private void maybeQueueReadyTasksForExecutionH() { |
| synchronized (mTasks) { |
| int idleCount = 0; |
| int backoffCount = 0; |
| int connectivityCount = 0; |
| List<TaskStatus> runnableTasks = new ArrayList<TaskStatus>(); |
| for (TaskStatus ts : mTasks.getTasks()) { |
| if (isReadyToBeExecutedLocked(ts)) { |
| if (ts.getNumFailures() > 0) { |
| backoffCount++; |
| } |
| if (ts.hasIdleConstraint()) { |
| idleCount++; |
| } |
| if (ts.hasConnectivityConstraint() || ts.hasUnmeteredConstraint()) { |
| connectivityCount++; |
| } |
| runnableTasks.add(ts); |
| } else if (isReadyToBeCancelledLocked(ts)) { |
| stopTaskOnServiceContextLocked(ts); |
| } |
| } |
| if (backoffCount > 0 || idleCount >= MIN_IDLE_COUNT || |
| connectivityCount >= MIN_CONNECTIVITY_COUNT || |
| runnableTasks.size() >= MIN_READY_TASKS_COUNT) { |
| for (TaskStatus ts : runnableTasks) { |
| mPendingTasks.add(ts); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Criteria for moving a job into the pending queue: |
| * - It's ready. |
| * - It's not pending. |
| * - It's not already running on a TSC. |
| */ |
| private boolean isReadyToBeExecutedLocked(TaskStatus ts) { |
| return ts.isReady() && !mPendingTasks.contains(ts) && !isCurrentlyActiveLocked(ts); |
| } |
| |
| /** |
| * Criteria for cancelling an active job: |
| * - It's not ready |
| * - It's running on a TSC. |
| */ |
| private boolean isReadyToBeCancelledLocked(TaskStatus ts) { |
| return !ts.isReady() && isCurrentlyActiveLocked(ts); |
| } |
| |
| /** |
| * Reconcile jobs in the pending queue against available execution contexts. |
| * A controller can force a task into the pending queue even if it's already running, but |
| * here is where we decide whether to actually execute it. |
| */ |
| private void maybeRunPendingTasksH() { |
| synchronized (mTasks) { |
| Iterator<TaskStatus> it = mPendingTasks.iterator(); |
| while (it.hasNext()) { |
| TaskStatus nextPending = it.next(); |
| TaskServiceContext availableContext = null; |
| for (TaskServiceContext tsc : mActiveServices) { |
| final TaskStatus running = tsc.getRunningTask(); |
| if (running != null && running.matches(nextPending.getUid(), |
| nextPending.getTaskId())) { |
| // Already running this tId for this uId, skip. |
| availableContext = null; |
| break; |
| } |
| if (tsc.isAvailable()) { |
| availableContext = tsc; |
| } |
| } |
| if (availableContext != null) { |
| if (!availableContext.executeRunnableTask(nextPending)) { |
| if (DEBUG) { |
| Slog.d(TAG, "Error executing " + nextPending); |
| } |
| mTasks.remove(nextPending); |
| } |
| it.remove(); |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Binder stub trampoline implementation |
| */ |
| final class TaskManagerStub extends ITaskManager.Stub { |
| /** Cache determination of whether a given app can persist tasks |
| * key is uid of the calling app; value is undetermined/true/false |
| */ |
| private final SparseArray<Boolean> mPersistCache = new SparseArray<Boolean>(); |
| |
| // Enforce that only the app itself (or shared uid participant) can schedule a |
| // task that runs one of the app's services, as well as verifying that the |
| // named service properly requires the BIND_TASK_SERVICE permission |
| private void enforceValidJobRequest(int uid, Task job) { |
| final PackageManager pm = getContext().getPackageManager(); |
| final ComponentName service = job.getService(); |
| try { |
| ServiceInfo si = pm.getServiceInfo(service, 0); |
| if (si.applicationInfo.uid != uid) { |
| throw new IllegalArgumentException("uid " + uid + |
| " cannot schedule job in " + service.getPackageName()); |
| } |
| if (!TaskService.PERMISSION_BIND.equals(si.permission)) { |
| throw new IllegalArgumentException("Scheduled service " + service |
| + " does not require android.permission.BIND_TASK_SERVICE permission"); |
| } |
| } catch (NameNotFoundException e) { |
| throw new IllegalArgumentException("No such service: " + service); |
| } |
| } |
| |
| private boolean canPersistJobs(int pid, int uid) { |
| // If we get this far we're good to go; all we need to do now is check |
| // whether the app is allowed to persist its scheduled work. |
| final boolean canPersist; |
| synchronized (mPersistCache) { |
| Boolean cached = mPersistCache.get(uid); |
| if (cached != null) { |
| canPersist = cached.booleanValue(); |
| } else { |
| // Persisting tasks is tantamount to running at boot, so we permit |
| // it when the app has declared that it uses the RECEIVE_BOOT_COMPLETED |
| // permission |
| int result = getContext().checkPermission( |
| android.Manifest.permission.RECEIVE_BOOT_COMPLETED, pid, uid); |
| canPersist = (result == PackageManager.PERMISSION_GRANTED); |
| mPersistCache.put(uid, canPersist); |
| } |
| } |
| return canPersist; |
| } |
| |
| // ITaskManager implementation |
| @Override |
| public int schedule(Task task) throws RemoteException { |
| if (DEBUG) { |
| Slog.d(TAG, "Scheduling task: " + task); |
| } |
| final int pid = Binder.getCallingPid(); |
| final int uid = Binder.getCallingUid(); |
| |
| enforceValidJobRequest(uid, task); |
| final boolean canPersist = canPersistJobs(pid, uid); |
| |
| long ident = Binder.clearCallingIdentity(); |
| try { |
| return TaskManagerService.this.schedule(task, uid, canPersist); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| @Override |
| public List<Task> getAllPendingTasks() throws RemoteException { |
| final int uid = Binder.getCallingUid(); |
| |
| long ident = Binder.clearCallingIdentity(); |
| try { |
| return TaskManagerService.this.getPendingTasks(uid); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| @Override |
| public void cancelAll() throws RemoteException { |
| final int uid = Binder.getCallingUid(); |
| |
| long ident = Binder.clearCallingIdentity(); |
| try { |
| TaskManagerService.this.cancelTasksForUid(uid); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| @Override |
| public void cancel(int taskId) throws RemoteException { |
| final int uid = Binder.getCallingUid(); |
| |
| long ident = Binder.clearCallingIdentity(); |
| try { |
| TaskManagerService.this.cancelTask(uid, taskId); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| /** |
| * "dumpsys" infrastructure |
| */ |
| @Override |
| public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| getContext().enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, TAG); |
| |
| long identityToken = Binder.clearCallingIdentity(); |
| try { |
| TaskManagerService.this.dumpInternal(pw); |
| } finally { |
| Binder.restoreCallingIdentity(identityToken); |
| } |
| } |
| }; |
| |
| void dumpInternal(PrintWriter pw) { |
| synchronized (mTasks) { |
| pw.println("Registered tasks:"); |
| if (mTasks.size() > 0) { |
| for (TaskStatus ts : mTasks.getTasks()) { |
| ts.dump(pw, " "); |
| } |
| } else { |
| pw.println(); |
| pw.println("No tasks scheduled."); |
| } |
| for (StateController controller : mControllers) { |
| pw.println(); |
| controller.dumpControllerState(pw); |
| } |
| pw.println(); |
| pw.println("Pending"); |
| for (TaskStatus taskStatus : mPendingTasks) { |
| pw.println(taskStatus.hashCode()); |
| } |
| pw.println(); |
| pw.println("Active jobs:"); |
| for (TaskServiceContext tsc : mActiveServices) { |
| if (tsc.isAvailable()) { |
| continue; |
| } else { |
| pw.println(tsc.getRunningTask().hashCode() + " for: " + |
| (SystemClock.elapsedRealtime() |
| - tsc.getExecutionStartTimeElapsed())/1000 + "s " + |
| "timeout: " + tsc.getTimeoutElapsed()); |
| } |
| } |
| } |
| pw.println(); |
| } |
| } |
