| /* |
| * 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.app.Service; |
| import android.content.Intent; |
| import android.os.IBinder; |
| |
| /** |
| * <p>Entry point for the callback from the {@link android.app.job.JobScheduler}.</p> |
| * <p>This is the base class that handles asynchronous requests that were previously scheduled. You |
| * are responsible for overriding {@link JobService#onStartJob(JobParameters)}, which is where |
| * you will implement your job logic.</p> |
| * <p>This service executes each incoming job on a {@link android.os.Handler} running on your |
| * application's main thread. This means that you <b>must</b> offload your execution logic to |
| * another thread/handler/{@link android.os.AsyncTask} of your choosing. Not doing so will result |
| * in blocking any future callbacks from the JobManager - specifically |
| * {@link #onStopJob(android.app.job.JobParameters)}, which is meant to inform you that the |
| * scheduling requirements are no longer being met.</p> |
| */ |
| public abstract class JobService extends Service { |
| private static final String TAG = "JobService"; |
| |
| /** |
| * Job services must be protected with this permission: |
| * |
| * <pre class="prettyprint"> |
| * <service android:name="MyJobService" |
| * android:permission="android.permission.BIND_JOB_SERVICE" > |
| * ... |
| * </service> |
| * </pre> |
| * |
| * <p>If a job service is declared in the manifest but not protected with this |
| * permission, that service will be ignored by the system. |
| */ |
| public static final String PERMISSION_BIND = |
| "android.permission.BIND_JOB_SERVICE"; |
| |
| private JobServiceEngine mEngine; |
| |
| /** @hide */ |
| public final IBinder onBind(Intent intent) { |
| if (mEngine == null) { |
| mEngine = new JobServiceEngine(this) { |
| @Override |
| public boolean onStartJob(JobParameters params) { |
| return JobService.this.onStartJob(params); |
| } |
| |
| @Override |
| public boolean onStopJob(JobParameters params) { |
| return JobService.this.onStopJob(params); |
| } |
| }; |
| } |
| return mEngine.getBinder(); |
| } |
| |
| /** |
| * Call this to inform the JobScheduler that the job has finished its work. When the |
| * system receives this message, it releases the wakelock being held for the job. |
| * <p> |
| * You can request that the job be scheduled again by passing {@code true} as |
| * the <code>wantsReschedule</code> parameter. This will apply back-off policy |
| * for the job; this policy can be adjusted through the |
| * {@link android.app.job.JobInfo.Builder#setBackoffCriteria(long, int)} method |
| * when the job is originally scheduled. The job's initial |
| * requirements are preserved when jobs are rescheduled, regardless of backed-off |
| * policy. |
| * <p class="note"> |
| * A job running while the device is dozing will not be rescheduled with the normal back-off |
| * policy. Instead, the job will be re-added to the queue and executed again during |
| * a future idle maintenance window. |
| * </p> |
| * |
| * @param params The parameters identifying this job, as supplied to |
| * the job in the {@link #onStartJob(JobParameters)} callback. |
| * @param wantsReschedule {@code true} if this job should be rescheduled according |
| * to the back-off criteria specified when it was first scheduled; {@code false} |
| * otherwise. |
| */ |
| public final void jobFinished(JobParameters params, boolean wantsReschedule) { |
| mEngine.jobFinished(params, wantsReschedule); |
| } |
| |
| /** |
| * Called to indicate that the job has begun executing. Override this method with the |
| * logic for your job. Like all other component lifecycle callbacks, this method executes |
| * on your application's main thread. |
| * <p> |
| * Return {@code true} from this method if your job needs to continue running. If you |
| * do this, the job remains active until you call |
| * {@link #jobFinished(JobParameters, boolean)} to tell the system that it has completed |
| * its work, or until the job's required constraints are no longer satisfied. For |
| * example, if the job was scheduled using |
| * {@link JobInfo.Builder#setRequiresCharging(boolean) setRequiresCharging(true)}, |
| * it will be immediately halted by the system if the user unplugs the device from power, |
| * the job's {@link #onStopJob(JobParameters)} callback will be invoked, and the app |
| * will be expected to shut down all ongoing work connected with that job. |
| * <p> |
| * The system holds a wakelock on behalf of your app as long as your job is executing. |
| * This wakelock is acquired before this method is invoked, and is not released until either |
| * you call {@link #jobFinished(JobParameters, boolean)}, or after the system invokes |
| * {@link #onStopJob(JobParameters)} to notify your job that it is being shut down |
| * prematurely. |
| * <p> |
| * Returning {@code false} from this method means your job is already finished. The |
| * system's wakelock for the job will be released, and {@link #onStopJob(JobParameters)} |
| * will not be invoked. |
| * |
| * @param params Parameters specifying info about this job, including the optional |
| * extras configured with {@link JobInfo.Builder#setExtras(android.os.PersistableBundle). |
| * This object serves to identify this specific running job instance when calling |
| * {@link #jobFinished(JobParameters, boolean)}. |
| * @return {@code true} if your service will continue running, using a separate thread |
| * when appropriate. {@code false} means that this job has completed its work. |
| */ |
| public abstract boolean onStartJob(JobParameters params); |
| |
| /** |
| * This method is called if the system has determined that you must stop execution of your job |
| * even before you've had a chance to call {@link #jobFinished(JobParameters, boolean)}. |
| * |
| * <p>This will happen if the requirements specified at schedule time are no longer met. For |
| * example you may have requested WiFi with |
| * {@link android.app.job.JobInfo.Builder#setRequiredNetworkType(int)}, yet while your |
| * job was executing the user toggled WiFi. Another example is if you had specified |
| * {@link android.app.job.JobInfo.Builder#setRequiresDeviceIdle(boolean)}, and the phone left its |
| * idle maintenance window. You are solely responsible for the behavior of your application |
| * upon receipt of this message; your app will likely start to misbehave if you ignore it. |
| * <p> |
| * Once this method returns, the system releases the wakelock that it is holding on |
| * behalf of the job.</p> |
| * |
| * @param params The parameters identifying this job, as supplied to |
| * the job in the {@link #onStartJob(JobParameters)} callback. |
| * @return {@code true} to indicate to the JobManager whether you'd like to reschedule |
| * this job based on the retry criteria provided at job creation-time; or {@code false} |
| * to end the job entirely. Regardless of the value returned, your job must stop executing. |
| */ |
| public abstract boolean onStopJob(JobParameters params); |
| } |
