JobSchedulerService.java revision f973a7b17135535528ae6e792d38d4bf081b44c4
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; 18 19import java.io.FileDescriptor; 20import java.io.PrintWriter; 21import java.util.ArrayList; 22import java.util.Iterator; 23import java.util.List; 24 25import android.app.AppGlobals; 26import android.app.job.JobInfo; 27import android.app.job.JobScheduler; 28import android.app.job.JobService; 29import android.app.job.IJobScheduler; 30import android.content.BroadcastReceiver; 31import android.content.ComponentName; 32import android.content.Context; 33import android.content.Intent; 34import android.content.IntentFilter; 35import android.content.pm.IPackageManager; 36import android.content.pm.PackageManager; 37import android.content.pm.ServiceInfo; 38import android.os.BatteryStats; 39import android.os.Binder; 40import android.os.Handler; 41import android.os.Looper; 42import android.os.Message; 43import android.os.RemoteException; 44import android.os.ServiceManager; 45import android.os.SystemClock; 46import android.os.UserHandle; 47import android.util.ArraySet; 48import android.util.Slog; 49import android.util.SparseArray; 50 51import com.android.internal.app.IBatteryStats; 52import com.android.server.job.controllers.BatteryController; 53import com.android.server.job.controllers.ConnectivityController; 54import com.android.server.job.controllers.IdleController; 55import com.android.server.job.controllers.JobStatus; 56import com.android.server.job.controllers.StateController; 57import com.android.server.job.controllers.TimeController; 58 59/** 60 * Responsible for taking jobs representing work to be performed by a client app, and determining 61 * based on the criteria specified when that job should be run against the client application's 62 * endpoint. 63 * Implements logic for scheduling, and rescheduling jobs. The JobSchedulerService knows nothing 64 * about constraints, or the state of active jobs. It receives callbacks from the various 65 * controllers and completed jobs and operates accordingly. 66 * 67 * Note on locking: Any operations that manipulate {@link #mJobs} need to lock on that object. 68 * Any function with the suffix 'Locked' also needs to lock on {@link #mJobs}. 69 * @hide 70 */ 71public class JobSchedulerService extends com.android.server.SystemService 72 implements StateChangedListener, JobCompletedListener { 73 // TODO: Switch this off for final version. 74 static final boolean DEBUG = true; 75 /** The number of concurrent jobs we run at one time. */ 76 private static final int MAX_JOB_CONTEXTS_COUNT = 3; 77 static final String TAG = "JobSchedulerService"; 78 /** Master list of jobs. */ 79 final JobStore mJobs; 80 81 static final int MSG_JOB_EXPIRED = 0; 82 static final int MSG_CHECK_JOB = 1; 83 84 // Policy constants 85 /** 86 * Minimum # of idle jobs that must be ready in order to force the JMS to schedule things 87 * early. 88 */ 89 static final int MIN_IDLE_COUNT = 1; 90 /** 91 * Minimum # of charging jobs that must be ready in order to force the JMS to schedule things 92 * early. 93 */ 94 static final int MIN_CHARGING_COUNT = 1; 95 /** 96 * Minimum # of connectivity jobs that must be ready in order to force the JMS to schedule 97 * things early. 98 */ 99 static final int MIN_CONNECTIVITY_COUNT = 2; 100 /** 101 * Minimum # of jobs (with no particular constraints) for which the JMS will be happy running 102 * some work early. 103 * This is correlated with the amount of batching we'll be able to do. 104 */ 105 static final int MIN_READY_JOBS_COUNT = 2; 106 107 /** 108 * Track Services that have currently active or pending jobs. The index is provided by 109 * {@link JobStatus#getServiceToken()} 110 */ 111 final List<JobServiceContext> mActiveServices = new ArrayList<JobServiceContext>(); 112 /** List of controllers that will notify this service of updates to jobs. */ 113 List<StateController> mControllers; 114 /** 115 * Queue of pending jobs. The JobServiceContext class will receive jobs from this list 116 * when ready to execute them. 117 */ 118 final ArrayList<JobStatus> mPendingJobs = new ArrayList<JobStatus>(); 119 120 final ArrayList<Integer> mStartedUsers = new ArrayList(); 121 122 final JobHandler mHandler; 123 final JobSchedulerStub mJobSchedulerStub; 124 125 IBatteryStats mBatteryStats; 126 127 /** 128 * Set to true once we are allowed to run third party apps. 129 */ 130 boolean mReadyToRock; 131 132 /** 133 * Cleans up outstanding jobs when a package is removed. Even if it's being replaced later we 134 * still clean up. On reinstall the package will have a new uid. 135 */ 136 private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() { 137 @Override 138 public void onReceive(Context context, Intent intent) { 139 Slog.d(TAG, "Receieved: " + intent.getAction()); 140 if (Intent.ACTION_PACKAGE_REMOVED.equals(intent.getAction())) { 141 int uidRemoved = intent.getIntExtra(Intent.EXTRA_UID, -1); 142 if (DEBUG) { 143 Slog.d(TAG, "Removing jobs for uid: " + uidRemoved); 144 } 145 cancelJobsForUid(uidRemoved); 146 } else if (Intent.ACTION_USER_REMOVED.equals(intent.getAction())) { 147 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0); 148 if (DEBUG) { 149 Slog.d(TAG, "Removing jobs for user: " + userId); 150 } 151 cancelJobsForUser(userId); 152 } 153 } 154 }; 155 156 @Override 157 public void onStartUser(int userHandle) { 158 mStartedUsers.add(userHandle); 159 // Let's kick any outstanding jobs for this user. 160 mHandler.obtainMessage(MSG_CHECK_JOB).sendToTarget(); 161 } 162 163 @Override 164 public void onStopUser(int userHandle) { 165 mStartedUsers.remove(Integer.valueOf(userHandle)); 166 } 167 168 /** 169 * Entry point from client to schedule the provided job. 170 * This cancels the job if it's already been scheduled, and replaces it with the one provided. 171 * @param job JobInfo object containing execution parameters 172 * @param uId The package identifier of the application this job is for. 173 * @return Result of this operation. See <code>JobScheduler#RESULT_*</code> return codes. 174 */ 175 public int schedule(JobInfo job, int uId) { 176 JobStatus jobStatus = new JobStatus(job, uId); 177 cancelJob(uId, job.getId()); 178 startTrackingJob(jobStatus); 179 mHandler.obtainMessage(MSG_CHECK_JOB).sendToTarget(); 180 return JobScheduler.RESULT_SUCCESS; 181 } 182 183 public List<JobInfo> getPendingJobs(int uid) { 184 ArrayList<JobInfo> outList = new ArrayList<JobInfo>(); 185 synchronized (mJobs) { 186 ArraySet<JobStatus> jobs = mJobs.getJobs(); 187 for (int i=0; i<jobs.size(); i++) { 188 JobStatus job = jobs.valueAt(i); 189 if (job.getUid() == uid) { 190 outList.add(job.getJob()); 191 } 192 } 193 } 194 return outList; 195 } 196 197 private void cancelJobsForUser(int userHandle) { 198 synchronized (mJobs) { 199 List<JobStatus> jobsForUser = mJobs.getJobsByUser(userHandle); 200 for (int i=0; i<jobsForUser.size(); i++) { 201 JobStatus toRemove = jobsForUser.get(i); 202 if (DEBUG) { 203 Slog.d(TAG, "Cancelling: " + toRemove); 204 } 205 cancelJobLocked(toRemove); 206 } 207 } 208 } 209 210 /** 211 * Entry point from client to cancel all jobs originating from their uid. 212 * This will remove the job from the master list, and cancel the job if it was staged for 213 * execution or being executed. 214 * @param uid To check against for removal of a job. 215 */ 216 public void cancelJobsForUid(int uid) { 217 // Remove from master list. 218 synchronized (mJobs) { 219 List<JobStatus> jobsForUid = mJobs.getJobsByUid(uid); 220 for (int i=0; i<jobsForUid.size(); i++) { 221 JobStatus toRemove = jobsForUid.get(i); 222 if (DEBUG) { 223 Slog.d(TAG, "Cancelling: " + toRemove); 224 } 225 cancelJobLocked(toRemove); 226 } 227 } 228 } 229 230 /** 231 * Entry point from client to cancel the job corresponding to the jobId provided. 232 * This will remove the job from the master list, and cancel the job if it was staged for 233 * execution or being executed. 234 * @param uid Uid of the calling client. 235 * @param jobId Id of the job, provided at schedule-time. 236 */ 237 public void cancelJob(int uid, int jobId) { 238 JobStatus toCancel; 239 synchronized (mJobs) { 240 toCancel = mJobs.getJobByUidAndJobId(uid, jobId); 241 if (toCancel != null) { 242 cancelJobLocked(toCancel); 243 } 244 } 245 } 246 247 private void cancelJobLocked(JobStatus cancelled) { 248 if (DEBUG) { 249 Slog.d(TAG, "Cancelling: " + cancelled); 250 } 251 // Remove from store. 252 stopTrackingJob(cancelled); 253 // Remove from pending queue. 254 mPendingJobs.remove(cancelled); 255 // Cancel if running. 256 stopJobOnServiceContextLocked(cancelled); 257 } 258 259 /** 260 * Initializes the system service. 261 * <p> 262 * Subclasses must define a single argument constructor that accepts the context 263 * and passes it to super. 264 * </p> 265 * 266 * @param context The system server context. 267 */ 268 public JobSchedulerService(Context context) { 269 super(context); 270 // Create the controllers. 271 mControllers = new ArrayList<StateController>(); 272 mControllers.add(ConnectivityController.get(this)); 273 mControllers.add(TimeController.get(this)); 274 mControllers.add(IdleController.get(this)); 275 mControllers.add(BatteryController.get(this)); 276 277 mHandler = new JobHandler(context.getMainLooper()); 278 mJobSchedulerStub = new JobSchedulerStub(); 279 mJobs = JobStore.initAndGet(this); 280 } 281 282 @Override 283 public void onStart() { 284 publishBinderService(Context.JOB_SCHEDULER_SERVICE, mJobSchedulerStub); 285 } 286 287 @Override 288 public void onBootPhase(int phase) { 289 if (PHASE_SYSTEM_SERVICES_READY == phase) { 290 // Register br for package removals and user removals. 291 final IntentFilter filter = new IntentFilter(Intent.ACTION_PACKAGE_REMOVED); 292 filter.addDataScheme("package"); 293 getContext().registerReceiverAsUser( 294 mBroadcastReceiver, UserHandle.ALL, filter, null, null); 295 final IntentFilter userFilter = new IntentFilter(Intent.ACTION_USER_REMOVED); 296 getContext().registerReceiverAsUser( 297 mBroadcastReceiver, UserHandle.ALL, userFilter, null, null); 298 } else if (phase == PHASE_THIRD_PARTY_APPS_CAN_START) { 299 synchronized (mJobs) { 300 // Let's go! 301 mReadyToRock = true; 302 mBatteryStats = IBatteryStats.Stub.asInterface(ServiceManager.getService( 303 BatteryStats.SERVICE_NAME)); 304 // Create the "runners". 305 for (int i = 0; i < MAX_JOB_CONTEXTS_COUNT; i++) { 306 mActiveServices.add( 307 new JobServiceContext(this, mBatteryStats, 308 getContext().getMainLooper())); 309 } 310 // Attach jobs to their controllers. 311 ArraySet<JobStatus> jobs = mJobs.getJobs(); 312 for (int i=0; i<jobs.size(); i++) { 313 JobStatus job = jobs.valueAt(i); 314 for (int controller=0; controller<mControllers.size(); controller++) { 315 mControllers.get(controller).maybeStartTrackingJob(job); 316 } 317 } 318 // GO GO GO! 319 mHandler.obtainMessage(MSG_CHECK_JOB).sendToTarget(); 320 } 321 } 322 } 323 324 /** 325 * Called when we have a job status object that we need to insert in our 326 * {@link com.android.server.job.JobStore}, and make sure all the relevant controllers know 327 * about. 328 */ 329 private void startTrackingJob(JobStatus jobStatus) { 330 boolean update; 331 boolean rocking; 332 synchronized (mJobs) { 333 update = mJobs.add(jobStatus); 334 rocking = mReadyToRock; 335 } 336 if (rocking) { 337 for (int i=0; i<mControllers.size(); i++) { 338 StateController controller = mControllers.get(i); 339 if (update) { 340 controller.maybeStopTrackingJob(jobStatus); 341 } 342 controller.maybeStartTrackingJob(jobStatus); 343 } 344 } 345 } 346 347 /** 348 * Called when we want to remove a JobStatus object that we've finished executing. Returns the 349 * object removed. 350 */ 351 private boolean stopTrackingJob(JobStatus jobStatus) { 352 boolean removed; 353 boolean rocking; 354 synchronized (mJobs) { 355 // Remove from store as well as controllers. 356 removed = mJobs.remove(jobStatus); 357 rocking = mReadyToRock; 358 } 359 if (removed && rocking) { 360 for (int i=0; i<mControllers.size(); i++) { 361 StateController controller = mControllers.get(i); 362 controller.maybeStopTrackingJob(jobStatus); 363 } 364 } 365 return removed; 366 } 367 368 private boolean stopJobOnServiceContextLocked(JobStatus job) { 369 for (int i=0; i<mActiveServices.size(); i++) { 370 JobServiceContext jsc = mActiveServices.get(i); 371 final JobStatus executing = jsc.getRunningJob(); 372 if (executing != null && executing.matches(job.getUid(), job.getJobId())) { 373 jsc.cancelExecutingJob(); 374 return true; 375 } 376 } 377 return false; 378 } 379 380 /** 381 * @param job JobStatus we are querying against. 382 * @return Whether or not the job represented by the status object is currently being run or 383 * is pending. 384 */ 385 private boolean isCurrentlyActiveLocked(JobStatus job) { 386 for (int i=0; i<mActiveServices.size(); i++) { 387 JobServiceContext serviceContext = mActiveServices.get(i); 388 final JobStatus running = serviceContext.getRunningJob(); 389 if (running != null && running.matches(job.getUid(), job.getJobId())) { 390 return true; 391 } 392 } 393 return false; 394 } 395 396 /** 397 * A job is rescheduled with exponential back-off if the client requests this from their 398 * execution logic. 399 * A caveat is for idle-mode jobs, for which the idle-mode constraint will usurp the 400 * timeliness of the reschedule. For an idle-mode job, no deadline is given. 401 * @param failureToReschedule Provided job status that we will reschedule. 402 * @return A newly instantiated JobStatus with the same constraints as the last job except 403 * with adjusted timing constraints. 404 */ 405 private JobStatus getRescheduleJobForFailure(JobStatus failureToReschedule) { 406 final long elapsedNowMillis = SystemClock.elapsedRealtime(); 407 final JobInfo job = failureToReschedule.getJob(); 408 409 final long initialBackoffMillis = job.getInitialBackoffMillis(); 410 final int backoffAttempts = failureToReschedule.getNumFailures() + 1; 411 long delayMillis; 412 413 switch (job.getBackoffPolicy()) { 414 case JobInfo.BACKOFF_POLICY_LINEAR: 415 delayMillis = initialBackoffMillis * backoffAttempts; 416 break; 417 default: 418 if (DEBUG) { 419 Slog.v(TAG, "Unrecognised back-off policy, defaulting to exponential."); 420 } 421 case JobInfo.BACKOFF_POLICY_EXPONENTIAL: 422 delayMillis = 423 (long) Math.scalb(initialBackoffMillis, backoffAttempts - 1); 424 break; 425 } 426 delayMillis = 427 Math.min(delayMillis, JobInfo.MAX_BACKOFF_DELAY_MILLIS); 428 return new JobStatus(failureToReschedule, elapsedNowMillis + delayMillis, 429 JobStatus.NO_LATEST_RUNTIME, backoffAttempts); 430 } 431 432 /** 433 * Called after a periodic has executed so we can to re-add it. We take the last execution time 434 * of the job to be the time of completion (i.e. the time at which this function is called). 435 * This could be inaccurate b/c the job can run for as long as 436 * {@link com.android.server.job.JobServiceContext#EXECUTING_TIMESLICE_MILLIS}, but will lead 437 * to underscheduling at least, rather than if we had taken the last execution time to be the 438 * start of the execution. 439 * @return A new job representing the execution criteria for this instantiation of the 440 * recurring job. 441 */ 442 private JobStatus getRescheduleJobForPeriodic(JobStatus periodicToReschedule) { 443 final long elapsedNow = SystemClock.elapsedRealtime(); 444 // Compute how much of the period is remaining. 445 long runEarly = Math.max(periodicToReschedule.getLatestRunTimeElapsed() - elapsedNow, 0); 446 long newEarliestRunTimeElapsed = elapsedNow + runEarly; 447 long period = periodicToReschedule.getJob().getIntervalMillis(); 448 long newLatestRuntimeElapsed = newEarliestRunTimeElapsed + period; 449 450 if (DEBUG) { 451 Slog.v(TAG, "Rescheduling executed periodic. New execution window [" + 452 newEarliestRunTimeElapsed/1000 + ", " + newLatestRuntimeElapsed/1000 + "]s"); 453 } 454 return new JobStatus(periodicToReschedule, newEarliestRunTimeElapsed, 455 newLatestRuntimeElapsed, 0 /* backoffAttempt */); 456 } 457 458 // JobCompletedListener implementations. 459 460 /** 461 * A job just finished executing. We fetch the 462 * {@link com.android.server.job.controllers.JobStatus} from the store and depending on 463 * whether we want to reschedule we readd it to the controllers. 464 * @param jobStatus Completed job. 465 * @param needsReschedule Whether the implementing class should reschedule this job. 466 */ 467 @Override 468 public void onJobCompleted(JobStatus jobStatus, boolean needsReschedule) { 469 if (DEBUG) { 470 Slog.d(TAG, "Completed " + jobStatus + ", reschedule=" + needsReschedule); 471 } 472 if (!stopTrackingJob(jobStatus)) { 473 if (DEBUG) { 474 Slog.d(TAG, "Could not find job to remove. Was job removed while executing?"); 475 } 476 return; 477 } 478 if (needsReschedule) { 479 JobStatus rescheduled = getRescheduleJobForFailure(jobStatus); 480 startTrackingJob(rescheduled); 481 } else if (jobStatus.getJob().isPeriodic()) { 482 JobStatus rescheduledPeriodic = getRescheduleJobForPeriodic(jobStatus); 483 startTrackingJob(rescheduledPeriodic); 484 } 485 mHandler.obtainMessage(MSG_CHECK_JOB).sendToTarget(); 486 } 487 488 // StateChangedListener implementations. 489 490 /** 491 * Off-board work to our handler thread as quickly as possible, b/c this call is probably being 492 * made on the main thread. 493 * For now this takes the job and if it's ready to run it will run it. In future we might not 494 * provide the job, so that the StateChangedListener has to run through its list of jobs to 495 * see which are ready. This will further decouple the controllers from the execution logic. 496 */ 497 @Override 498 public void onControllerStateChanged() { 499 synchronized (mJobs) { 500 if (mReadyToRock) { 501 // Post a message to to run through the list of jobs and start/stop any that 502 // are eligible. 503 mHandler.obtainMessage(MSG_CHECK_JOB).sendToTarget(); 504 } 505 } 506 } 507 508 @Override 509 public void onRunJobNow(JobStatus jobStatus) { 510 mHandler.obtainMessage(MSG_JOB_EXPIRED, jobStatus).sendToTarget(); 511 } 512 513 private class JobHandler extends Handler { 514 515 public JobHandler(Looper looper) { 516 super(looper); 517 } 518 519 @Override 520 public void handleMessage(Message message) { 521 switch (message.what) { 522 case MSG_JOB_EXPIRED: 523 synchronized (mJobs) { 524 JobStatus runNow = (JobStatus) message.obj; 525 // runNow can be null, which is a controller's way of indicating that its 526 // state is such that all ready jobs should be run immediately. 527 if (runNow != null && !mPendingJobs.contains(runNow)) { 528 mPendingJobs.add(runNow); 529 } 530 } 531 queueReadyJobsForExecutionH(); 532 break; 533 case MSG_CHECK_JOB: 534 // Check the list of jobs and run some of them if we feel inclined. 535 maybeQueueReadyJobsForExecutionH(); 536 break; 537 } 538 maybeRunPendingJobsH(); 539 // Don't remove JOB_EXPIRED in case one came along while processing the queue. 540 removeMessages(MSG_CHECK_JOB); 541 } 542 543 /** 544 * Run through list of jobs and execute all possible - at least one is expired so we do 545 * as many as we can. 546 */ 547 private void queueReadyJobsForExecutionH() { 548 synchronized (mJobs) { 549 ArraySet<JobStatus> jobs = mJobs.getJobs(); 550 for (int i=0; i<jobs.size(); i++) { 551 JobStatus job = jobs.valueAt(i); 552 if (isReadyToBeExecutedLocked(job)) { 553 mPendingJobs.add(job); 554 } else if (isReadyToBeCancelledLocked(job)) { 555 stopJobOnServiceContextLocked(job); 556 } 557 } 558 } 559 } 560 561 /** 562 * The state of at least one job has changed. Here is where we could enforce various 563 * policies on when we want to execute jobs. 564 * Right now the policy is such: 565 * If >1 of the ready jobs is idle mode we send all of them off 566 * if more than 2 network connectivity jobs are ready we send them all off. 567 * If more than 4 jobs total are ready we send them all off. 568 * TODO: It would be nice to consolidate these sort of high-level policies somewhere. 569 */ 570 private void maybeQueueReadyJobsForExecutionH() { 571 synchronized (mJobs) { 572 int chargingCount = 0; 573 int idleCount = 0; 574 int backoffCount = 0; 575 int connectivityCount = 0; 576 List<JobStatus> runnableJobs = new ArrayList<JobStatus>(); 577 ArraySet<JobStatus> jobs = mJobs.getJobs(); 578 for (int i=0; i<jobs.size(); i++) { 579 JobStatus job = jobs.valueAt(i); 580 if (isReadyToBeExecutedLocked(job)) { 581 if (job.getNumFailures() > 0) { 582 backoffCount++; 583 } 584 if (job.hasIdleConstraint()) { 585 idleCount++; 586 } 587 if (job.hasConnectivityConstraint() || job.hasUnmeteredConstraint()) { 588 connectivityCount++; 589 } 590 if (job.hasChargingConstraint()) { 591 chargingCount++; 592 } 593 runnableJobs.add(job); 594 } else if (isReadyToBeCancelledLocked(job)) { 595 stopJobOnServiceContextLocked(job); 596 } 597 } 598 if (backoffCount > 0 || 599 idleCount >= MIN_IDLE_COUNT || 600 connectivityCount >= MIN_CONNECTIVITY_COUNT || 601 chargingCount >= MIN_CHARGING_COUNT || 602 runnableJobs.size() >= MIN_READY_JOBS_COUNT) { 603 if (DEBUG) { 604 Slog.d(TAG, "maybeQueueReadyJobsForExecutionH: Running jobs."); 605 } 606 for (int i=0; i<runnableJobs.size(); i++) { 607 mPendingJobs.add(runnableJobs.get(i)); 608 } 609 } else { 610 if (DEBUG) { 611 Slog.d(TAG, "maybeQueueReadyJobsForExecutionH: Not running anything."); 612 } 613 } 614 if (DEBUG) { 615 Slog.d(TAG, "idle=" + idleCount + " connectivity=" + 616 connectivityCount + " charging=" + chargingCount + " tot=" + 617 runnableJobs.size()); 618 } 619 } 620 } 621 622 /** 623 * Criteria for moving a job into the pending queue: 624 * - It's ready. 625 * - It's not pending. 626 * - It's not already running on a JSC. 627 * - The user that requested the job is running. 628 */ 629 private boolean isReadyToBeExecutedLocked(JobStatus job) { 630 final boolean jobReady = job.isReady(); 631 final boolean jobPending = mPendingJobs.contains(job); 632 final boolean jobActive = isCurrentlyActiveLocked(job); 633 final boolean userRunning = mStartedUsers.contains(job.getUserId()); 634 635 if (DEBUG) { 636 Slog.v(TAG, "isReadyToBeExecutedLocked: " + job.toShortString() 637 + " ready=" + jobReady + " pending=" + jobPending 638 + " active=" + jobActive + " userRunning=" + userRunning); 639 } 640 return userRunning && jobReady && !jobPending && !jobActive; 641 } 642 643 /** 644 * Criteria for cancelling an active job: 645 * - It's not ready 646 * - It's running on a JSC. 647 */ 648 private boolean isReadyToBeCancelledLocked(JobStatus job) { 649 return !job.isReady() && isCurrentlyActiveLocked(job); 650 } 651 652 /** 653 * Reconcile jobs in the pending queue against available execution contexts. 654 * A controller can force a job into the pending queue even if it's already running, but 655 * here is where we decide whether to actually execute it. 656 */ 657 private void maybeRunPendingJobsH() { 658 synchronized (mJobs) { 659 Iterator<JobStatus> it = mPendingJobs.iterator(); 660 while (it.hasNext()) { 661 JobStatus nextPending = it.next(); 662 JobServiceContext availableContext = null; 663 for (int i=0; i<mActiveServices.size(); i++) { 664 JobServiceContext jsc = mActiveServices.get(i); 665 final JobStatus running = jsc.getRunningJob(); 666 if (running != null && running.matches(nextPending.getUid(), 667 nextPending.getJobId())) { 668 // Already running this job for this uId, skip. 669 availableContext = null; 670 break; 671 } 672 if (jsc.isAvailable()) { 673 availableContext = jsc; 674 } 675 } 676 if (availableContext != null) { 677 if (!availableContext.executeRunnableJob(nextPending)) { 678 if (DEBUG) { 679 Slog.d(TAG, "Error executing " + nextPending); 680 } 681 mJobs.remove(nextPending); 682 } 683 it.remove(); 684 } 685 } 686 } 687 } 688 } 689 690 /** 691 * Binder stub trampoline implementation 692 */ 693 final class JobSchedulerStub extends IJobScheduler.Stub { 694 /** Cache determination of whether a given app can persist jobs 695 * key is uid of the calling app; value is undetermined/true/false 696 */ 697 private final SparseArray<Boolean> mPersistCache = new SparseArray<Boolean>(); 698 699 // Enforce that only the app itself (or shared uid participant) can schedule a 700 // job that runs one of the app's services, as well as verifying that the 701 // named service properly requires the BIND_JOB_SERVICE permission 702 private void enforceValidJobRequest(int uid, JobInfo job) { 703 final IPackageManager pm = AppGlobals.getPackageManager(); 704 final ComponentName service = job.getService(); 705 try { 706 ServiceInfo si = pm.getServiceInfo(service, 0, UserHandle.getUserId(uid)); 707 if (si == null) { 708 throw new IllegalArgumentException("No such service " + service); 709 } 710 if (si.applicationInfo.uid != uid) { 711 throw new IllegalArgumentException("uid " + uid + 712 " cannot schedule job in " + service.getPackageName()); 713 } 714 if (!JobService.PERMISSION_BIND.equals(si.permission)) { 715 throw new IllegalArgumentException("Scheduled service " + service 716 + " does not require android.permission.BIND_JOB_SERVICE permission"); 717 } 718 } catch (RemoteException e) { 719 // Can't happen; the Package Manager is in this same process 720 } 721 } 722 723 private boolean canPersistJobs(int pid, int uid) { 724 // If we get this far we're good to go; all we need to do now is check 725 // whether the app is allowed to persist its scheduled work. 726 final boolean canPersist; 727 synchronized (mPersistCache) { 728 Boolean cached = mPersistCache.get(uid); 729 if (cached != null) { 730 canPersist = cached.booleanValue(); 731 } else { 732 // Persisting jobs is tantamount to running at boot, so we permit 733 // it when the app has declared that it uses the RECEIVE_BOOT_COMPLETED 734 // permission 735 int result = getContext().checkPermission( 736 android.Manifest.permission.RECEIVE_BOOT_COMPLETED, pid, uid); 737 canPersist = (result == PackageManager.PERMISSION_GRANTED); 738 mPersistCache.put(uid, canPersist); 739 } 740 } 741 return canPersist; 742 } 743 744 // IJobScheduler implementation 745 @Override 746 public int schedule(JobInfo job) throws RemoteException { 747 if (DEBUG) { 748 Slog.d(TAG, "Scheduling job: " + job.toString()); 749 } 750 final int pid = Binder.getCallingPid(); 751 final int uid = Binder.getCallingUid(); 752 753 enforceValidJobRequest(uid, job); 754 if (job.isPersisted()) { 755 if (!canPersistJobs(pid, uid)) { 756 throw new IllegalArgumentException("Error: requested job be persisted without" 757 + " holding RECEIVE_BOOT_COMPLETED permission."); 758 } 759 } 760 761 long ident = Binder.clearCallingIdentity(); 762 try { 763 return JobSchedulerService.this.schedule(job, uid); 764 } finally { 765 Binder.restoreCallingIdentity(ident); 766 } 767 } 768 769 @Override 770 public List<JobInfo> getAllPendingJobs() throws RemoteException { 771 final int uid = Binder.getCallingUid(); 772 773 long ident = Binder.clearCallingIdentity(); 774 try { 775 return JobSchedulerService.this.getPendingJobs(uid); 776 } finally { 777 Binder.restoreCallingIdentity(ident); 778 } 779 } 780 781 @Override 782 public void cancelAll() throws RemoteException { 783 final int uid = Binder.getCallingUid(); 784 785 long ident = Binder.clearCallingIdentity(); 786 try { 787 JobSchedulerService.this.cancelJobsForUid(uid); 788 } finally { 789 Binder.restoreCallingIdentity(ident); 790 } 791 } 792 793 @Override 794 public void cancel(int jobId) throws RemoteException { 795 final int uid = Binder.getCallingUid(); 796 797 long ident = Binder.clearCallingIdentity(); 798 try { 799 JobSchedulerService.this.cancelJob(uid, jobId); 800 } finally { 801 Binder.restoreCallingIdentity(ident); 802 } 803 } 804 805 /** 806 * "dumpsys" infrastructure 807 */ 808 @Override 809 public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 810 getContext().enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, TAG); 811 812 long identityToken = Binder.clearCallingIdentity(); 813 try { 814 JobSchedulerService.this.dumpInternal(pw); 815 } finally { 816 Binder.restoreCallingIdentity(identityToken); 817 } 818 } 819 }; 820 821 void dumpInternal(PrintWriter pw) { 822 final long now = SystemClock.elapsedRealtime(); 823 synchronized (mJobs) { 824 pw.print("Started users: "); 825 for (int i=0; i<mStartedUsers.size(); i++) { 826 pw.print("u" + mStartedUsers.get(i) + " "); 827 } 828 pw.println(); 829 pw.println("Registered jobs:"); 830 if (mJobs.size() > 0) { 831 ArraySet<JobStatus> jobs = mJobs.getJobs(); 832 for (int i=0; i<jobs.size(); i++) { 833 JobStatus job = jobs.valueAt(i); 834 job.dump(pw, " "); 835 } 836 } else { 837 pw.println(" None."); 838 } 839 for (int i=0; i<mControllers.size(); i++) { 840 pw.println(); 841 mControllers.get(i).dumpControllerState(pw); 842 } 843 pw.println(); 844 pw.println("Pending:"); 845 for (int i=0; i<mPendingJobs.size(); i++) { 846 pw.println(mPendingJobs.get(i).hashCode()); 847 } 848 pw.println(); 849 pw.println("Active jobs:"); 850 for (int i=0; i<mActiveServices.size(); i++) { 851 JobServiceContext jsc = mActiveServices.get(i); 852 if (jsc.isAvailable()) { 853 continue; 854 } else { 855 final long timeout = jsc.getTimeoutElapsed(); 856 pw.print("Running for: "); 857 pw.print((now - jsc.getExecutionStartTimeElapsed())/1000); 858 pw.print("s timeout="); 859 pw.print(timeout); 860 pw.print(" fromnow="); 861 pw.println(timeout-now); 862 jsc.getRunningJob().dump(pw, " "); 863 } 864 } 865 pw.println(); 866 pw.print("mReadyToRock="); pw.println(mReadyToRock); 867 } 868 pw.println(); 869 } 870} 871