1 files changed, 179 insertions, 0 deletions
diff --git a/java/com/android/voicemail/impl/scheduling/TaskSchedulerJobService.java b/java/com/android/voicemail/impl/scheduling/TaskSchedulerJobService.java
new file mode 100644
index 000000000..107234edc
--- /dev/null
+++ b/java/com/android/voicemail/impl/scheduling/TaskSchedulerJobService.java
@@ -0,0 +1,179 @@
+/*
+ * 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.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 =
+        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;
+  }
+}