| /* |
| * 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 android.app.job; |
| |
| import android.annotation.IntDef; |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.annotation.RequiresPermission; |
| import android.annotation.SystemApi; |
| import android.annotation.SystemService; |
| import android.content.ClipData; |
| import android.content.Context; |
| import android.os.Bundle; |
| import android.os.PersistableBundle; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import java.util.List; |
| |
| /** |
| * This is an API for scheduling various types of jobs against the framework that will be executed |
| * in your application's own process. |
| * <p> |
| * See {@link android.app.job.JobInfo} for more description of the types of jobs that can be run |
| * and how to construct them. You will construct these JobInfo objects and pass them to the |
| * JobScheduler with {@link #schedule(JobInfo)}. When the criteria declared are met, the |
| * system will execute this job on your application's {@link android.app.job.JobService}. |
| * You identify the service component that implements the logic for your job when you |
| * construct the JobInfo using |
| * {@link android.app.job.JobInfo.Builder#Builder(int,android.content.ComponentName)}. |
| * </p> |
| * <p> |
| * The framework will be intelligent about when it executes jobs, and attempt to batch |
| * and defer them as much as possible. Typically if you don't specify a deadline on a job, it |
| * can be run at any moment depending on the current state of the JobScheduler's internal queue. |
| * <p> |
| * While a job is running, the system holds a wakelock on behalf of your app. For this reason, |
| * you do not need to take any action to guarantee that the device stays awake for the |
| * duration of the job. |
| * </p> |
| * <p>You do not |
| * instantiate this class directly; instead, retrieve it through |
| * {@link android.content.Context#getSystemService |
| * Context.getSystemService(Context.JOB_SCHEDULER_SERVICE)}. |
| * |
| * <p> Prior to Android version {@link android.os.Build.VERSION_CODES#S}, jobs could only have |
| * a maximum of 100 jobs scheduled at a time. Starting with Android version |
| * {@link android.os.Build.VERSION_CODES#S}, that limit has been increased to 150. |
| * Expedited jobs also count towards the limit. |
| * |
| * <p> In Android version {@link android.os.Build.VERSION_CODES#LOLLIPOP}, jobs had a maximum |
| * execution time of one minute. Starting with Android version |
| * {@link android.os.Build.VERSION_CODES#M} and ending with Android version |
| * {@link android.os.Build.VERSION_CODES#R}, jobs had a maximum execution time of 10 minutes. |
| * Starting from Android version {@link android.os.Build.VERSION_CODES#S}, jobs will still be |
| * stopped after 10 minutes if the system is busy or needs the resources, but if not, jobs |
| * may continue running longer than 10 minutes. |
| * |
| * <p class="caution"><strong>Note:</strong> Beginning with API 30 |
| * ({@link android.os.Build.VERSION_CODES#R}), JobScheduler will throttle runaway applications. |
| * Calling {@link #schedule(JobInfo)} and other such methods with very high frequency can have a |
| * high cost and so, to make sure the system doesn't get overwhelmed, JobScheduler will begin |
| * to throttle apps, regardless of target SDK version. |
| */ |
| @SystemService(Context.JOB_SCHEDULER_SERVICE) |
| public abstract class JobScheduler { |
| /** @hide */ |
| @IntDef(prefix = { "RESULT_" }, value = { |
| RESULT_FAILURE, |
| RESULT_SUCCESS, |
| }) |
| @Retention(RetentionPolicy.SOURCE) |
| public @interface Result {} |
| |
| /** |
| * Returned from {@link #schedule(JobInfo)} if a job wasn't scheduled successfully. Scheduling |
| * can fail for a variety of reasons, including, but not limited to: |
| * <ul> |
| * <li>an invalid parameter was supplied (eg. the run-time for your job is too short, or the |
| * system can't resolve the requisite {@link JobService} in your package)</li> |
| * <li>the app has too many jobs scheduled</li> |
| * <li>the app has tried to schedule too many jobs in a short amount of time</li> |
| * </ul> |
| * Attempting to schedule the job again immediately after receiving this result will not |
| * guarantee a successful schedule. |
| */ |
| public static final int RESULT_FAILURE = 0; |
| /** |
| * Returned from {@link #schedule(JobInfo)} if this job has been successfully scheduled. |
| */ |
| public static final int RESULT_SUCCESS = 1; |
| |
| /** |
| * Schedule a job to be executed. Will replace any currently scheduled job with the same |
| * ID with the new information in the {@link JobInfo}. If a job with the given ID is currently |
| * running, it will be stopped. Note that in some cases, the newly scheduled job may be started |
| * before the previously running job has been fully stopped. See {@link JobService} for |
| * additional details. |
| * |
| * <p class="caution"><strong>Note:</strong> Scheduling a job can have a high cost, even if it's |
| * rescheduling the same job and the job didn't execute, especially on platform versions before |
| * version {@link android.os.Build.VERSION_CODES#Q}. As such, the system may throttle calls to |
| * this API if calls are made too frequently in a short amount of time. |
| * |
| * <p>Note: The JobService component needs to be enabled in order to successfully schedule a |
| * job. |
| * |
| * @param job The job you wish scheduled. See |
| * {@link android.app.job.JobInfo.Builder JobInfo.Builder} for more detail on the sorts of jobs |
| * you can schedule. |
| * @return the result of the schedule request. |
| * @throws IllegalArgumentException if the specified {@link JobService} doesn't exist or is |
| * disabled. |
| */ |
| public abstract @Result int schedule(@NonNull JobInfo job); |
| |
| /** |
| * Similar to {@link #schedule}, but allows you to enqueue work for a new <em>or existing</em> |
| * job. If a job with the same ID is already scheduled, it will be replaced with the |
| * new {@link JobInfo}, but any previously enqueued work will remain and be dispatched the |
| * next time it runs. If a job with the same ID is already running, the new work will be |
| * enqueued for it without stopping the job. |
| * |
| * <p>The work you enqueue is later retrieved through |
| * {@link JobParameters#dequeueWork() JobParameters.dequeueWork}. Be sure to see there |
| * about how to process work; the act of enqueueing work changes how you should handle the |
| * overall lifecycle of an executing job.</p> |
| * |
| * <p>It is strongly encouraged that you use the same {@link JobInfo} for all work you |
| * enqueue. This will allow the system to optimally schedule work along with any pending |
| * and/or currently running work. If the JobInfo changes from the last time the job was |
| * enqueued, the system will need to update the associated JobInfo, which can cause a disruption |
| * in execution. In particular, this can result in any currently running job that is processing |
| * previous work to be stopped and restarted with the new JobInfo.</p> |
| * |
| * <p>It is recommended that you avoid using |
| * {@link JobInfo.Builder#setExtras(PersistableBundle)} or |
| * {@link JobInfo.Builder#setTransientExtras(Bundle)} with a JobInfo you are using to |
| * enqueue work. The system will try to compare these extras with the previous JobInfo, |
| * but there are situations where it may get this wrong and count the JobInfo as changing. |
| * (That said, you should be relatively safe with a simple set of consistent data in these |
| * fields.) You should never use {@link JobInfo.Builder#setClipData(ClipData, int)} with |
| * work you are enqueue, since currently this will always be treated as a different JobInfo, |
| * even if the ClipData contents are exactly the same.</p> |
| * |
| * <p class="caution"><strong>Note:</strong> Scheduling a job can have a high cost, even if it's |
| * rescheduling the same job and the job didn't execute, especially on platform versions before |
| * version {@link android.os.Build.VERSION_CODES#Q}. As such, the system may throttle calls to |
| * this API if calls are made too frequently in a short amount of time. |
| * |
| * <p>Note: The JobService component needs to be enabled in order to successfully schedule a |
| * job. |
| * |
| * @param job The job you wish to enqueue work for. See |
| * {@link android.app.job.JobInfo.Builder JobInfo.Builder} for more detail on the sorts of jobs |
| * you can schedule. |
| * @param work New work to enqueue. This will be available later when the job starts running. |
| * @return the result of the enqueue request. |
| * @throws IllegalArgumentException if the specified {@link JobService} doesn't exist or is |
| * disabled. |
| */ |
| public abstract @Result int enqueue(@NonNull JobInfo job, @NonNull JobWorkItem work); |
| |
| /** |
| * |
| * @param job The job to be scheduled. |
| * @param packageName The package on behalf of which the job is to be scheduled. This will be |
| * used to track battery usage and appIdleState. |
| * @param userId User on behalf of whom this job is to be scheduled. |
| * @param tag Debugging tag for dumps associated with this job (instead of the service class) |
| * @hide |
| */ |
| @SuppressWarnings("HiddenAbstractMethod") |
| @SystemApi |
| @RequiresPermission(android.Manifest.permission.UPDATE_DEVICE_STATS) |
| public abstract @Result int scheduleAsPackage(@NonNull JobInfo job, @NonNull String packageName, |
| int userId, String tag); |
| |
| /** |
| * Cancel the specified job. If the job is currently executing, it is stopped |
| * immediately and the return value from its {@link JobService#onStopJob(JobParameters)} |
| * method is ignored. |
| * |
| * @param jobId unique identifier for the job to be canceled, as supplied to |
| * {@link JobInfo.Builder#Builder(int, android.content.ComponentName) |
| * JobInfo.Builder(int, android.content.ComponentName)}. |
| */ |
| public abstract void cancel(int jobId); |
| |
| /** |
| * Cancel <em>all</em> jobs that have been scheduled by the calling application. |
| */ |
| public abstract void cancelAll(); |
| |
| /** |
| * Retrieve all jobs that have been scheduled by the calling application. |
| * |
| * @return a list of all of the app's scheduled jobs. This includes jobs that are |
| * currently started as well as those that are still waiting to run. |
| */ |
| public abstract @NonNull List<JobInfo> getAllPendingJobs(); |
| |
| /** |
| * Look up the description of a scheduled job. |
| * |
| * @return The {@link JobInfo} description of the given scheduled job, or {@code null} |
| * if the supplied job ID does not correspond to any job. |
| */ |
| public abstract @Nullable JobInfo getPendingJob(int jobId); |
| |
| /** |
| * <b>For internal system callers only!</b> |
| * Returns a list of all currently-executing jobs. |
| * @hide |
| */ |
| @SuppressWarnings("HiddenAbstractMethod") |
| public abstract List<JobInfo> getStartedJobs(); |
| |
| /** |
| * <b>For internal system callers only!</b> |
| * Returns a snapshot of the state of all jobs known to the system. |
| * |
| * <p class="note">This is a slow operation, so it should be called sparingly. |
| * @hide |
| */ |
| @SuppressWarnings("HiddenAbstractMethod") |
| public abstract List<JobSnapshot> getAllJobSnapshots(); |
| } |