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/*
* Copyright (C) 2017 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.voicemail.impl.scheduling;
import android.annotation.TargetApi;
import android.app.job.JobInfo;
import android.app.job.JobParameters;
import android.app.job.JobScheduler;
import android.app.job.JobService;
import android.content.ComponentName;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Build.VERSION_CODES;
import android.os.Bundle;
import android.os.Parcelable;
import android.preference.PreferenceManager;
import android.support.annotation.MainThread;
import com.android.dialer.constants.ScheduledJobIds;
import com.android.dialer.strictmode.StrictModeUtils;
import com.android.voicemail.impl.Assert;
import com.android.voicemail.impl.VvmLog;
import java.util.ArrayList;
import java.util.List;
/** A {@link JobService} that will trigger the background execution of {@link TaskExecutor}. */
@TargetApi(VERSION_CODES.O)
public class TaskSchedulerJobService extends JobService implements TaskExecutor.Job {
private static final String TAG = "TaskSchedulerJobService";
private static final String EXTRA_TASK_EXTRAS_ARRAY = "extra_task_extras_array";
private static final String EXTRA_JOB_ID = "extra_job_id";
private static final String EXPECTED_JOB_ID =
"com.android.voicemail.impl.scheduling.TaskSchedulerJobService.EXPECTED_JOB_ID";
private static final String NEXT_JOB_ID =
"com.android.voicemail.impl.scheduling.TaskSchedulerJobService.NEXT_JOB_ID";
private JobParameters jobParameters;
@Override
@MainThread
public boolean onStartJob(JobParameters params) {
int jobId = params.getTransientExtras().getInt(EXTRA_JOB_ID);
int expectedJobId =
StrictModeUtils.bypass(
() -> PreferenceManager.getDefaultSharedPreferences(this).getInt(EXPECTED_JOB_ID, 0));
if (jobId != expectedJobId) {
VvmLog.e(
TAG, "Job " + jobId + " is not the last scheduled job " + expectedJobId + ", ignoring");
return false; // nothing more to do. Job not running in background.
}
VvmLog.i(TAG, "starting " + jobId);
jobParameters = params;
TaskExecutor.createRunningInstance(this);
TaskExecutor.getRunningInstance()
.onStartJob(
this,
getBundleList(
jobParameters.getTransientExtras().getParcelableArray(EXTRA_TASK_EXTRAS_ARRAY)));
return true /* job still running in background */;
}
@Override
@MainThread
public boolean onStopJob(JobParameters params) {
TaskExecutor.getRunningInstance().onStopJob();
jobParameters = null;
return false /* don't reschedule. TaskExecutor service will post a new job */;
}
/**
* Schedule a job to run the {@code pendingTasks}. If a job is already scheduled it will be
* appended to the back of the queue and the job will be rescheduled. A job may only be scheduled
* when the {@link TaskExecutor} is not running ({@link TaskExecutor#getRunningInstance()}
* returning {@code null})
*
* @param delayMillis delay before running the job. Must be 0 if{@code isNewJob} is true.
* @param isNewJob a new job will be forced to run immediately.
*/
@MainThread
public static void scheduleJob(
Context context, List<Bundle> pendingTasks, long delayMillis, boolean isNewJob) {
Assert.isMainThread();
JobScheduler jobScheduler = context.getSystemService(JobScheduler.class);
JobInfo pendingJob = jobScheduler.getPendingJob(ScheduledJobIds.VVM_TASK_SCHEDULER_JOB);
VvmLog.i(TAG, "scheduling job with " + pendingTasks.size() + " tasks");
if (pendingJob != null) {
if (isNewJob) {
List<Bundle> existingTasks =
getBundleList(
pendingJob.getTransientExtras().getParcelableArray(EXTRA_TASK_EXTRAS_ARRAY));
VvmLog.i(TAG, "merging job with " + existingTasks.size() + " existing tasks");
TaskQueue queue = new TaskQueue();
queue.fromBundles(context, existingTasks);
for (Bundle pendingTask : pendingTasks) {
queue.add(Tasks.createTask(context, pendingTask));
}
pendingTasks = queue.toBundles();
}
VvmLog.i(TAG, "canceling existing job.");
jobScheduler.cancel(ScheduledJobIds.VVM_TASK_SCHEDULER_JOB);
}
Bundle extras = new Bundle();
int jobId = createJobId(context);
extras.putInt(EXTRA_JOB_ID, jobId);
PreferenceManager.getDefaultSharedPreferences(context)
.edit()
.putInt(EXPECTED_JOB_ID, jobId)
.apply();
extras.putParcelableArray(
EXTRA_TASK_EXTRAS_ARRAY, pendingTasks.toArray(new Bundle[pendingTasks.size()]));
JobInfo.Builder builder =
new JobInfo.Builder(
ScheduledJobIds.VVM_TASK_SCHEDULER_JOB,
new ComponentName(context, TaskSchedulerJobService.class))
.setTransientExtras(extras)
.setMinimumLatency(delayMillis)
.setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY);
if (isNewJob) {
Assert.isTrue(delayMillis == 0);
builder.setOverrideDeadline(0);
VvmLog.i(TAG, "running job instantly.");
}
jobScheduler.schedule(builder.build());
VvmLog.i(TAG, "job " + jobId + " scheduled");
}
/**
* The system will hold a wakelock when {@link #onStartJob(JobParameters)} is called to ensure the
* device will not sleep when the job is still running. Finish the job so the system will release
* the wakelock
*/
@Override
public void finishAsync() {
VvmLog.i(TAG, "finishing job");
jobFinished(jobParameters, false);
jobParameters = null;
}
@MainThread
@Override
public boolean isFinished() {
Assert.isMainThread();
return getSystemService(JobScheduler.class)
.getPendingJob(ScheduledJobIds.VVM_TASK_SCHEDULER_JOB)
== null;
}
private static List<Bundle> getBundleList(Parcelable[] parcelables) {
List<Bundle> result = new ArrayList<>(parcelables.length);
for (Parcelable parcelable : parcelables) {
result.add((Bundle) parcelable);
}
return result;
}
private static int createJobId(Context context) {
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
int jobId = sharedPreferences.getInt(NEXT_JOB_ID, 0);
sharedPreferences.edit().putInt(NEXT_JOB_ID, jobId + 1).apply();
return jobId;
}
}
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