/
BackgroundFetchTaskConsumer.java
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/
BackgroundFetchTaskConsumer.java
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package expo.modules.backgroundfetch;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.job.JobParameters;
import android.app.job.JobService;
import android.content.Context;
import android.content.Intent;
import android.os.SystemClock;
import android.util.Log;
import org.unimodules.core.interfaces.LifecycleEventListener;
import org.unimodules.interfaces.taskManager.TaskConsumer;
import org.unimodules.interfaces.taskManager.TaskConsumerInterface;
import org.unimodules.interfaces.taskManager.TaskExecutionCallback;
import org.unimodules.interfaces.taskManager.TaskInterface;
import org.unimodules.interfaces.taskManager.TaskManagerUtilsInterface;
import java.util.Map;
public class BackgroundFetchTaskConsumer extends TaskConsumer implements TaskConsumerInterface, LifecycleEventListener {
private static final String TAG = BackgroundFetchTaskConsumer.class.getSimpleName();
private static final int DEFAULT_INTERVAL_MS = 10 * 60 * 1000; // 10 minutes
private TaskInterface mTask;
private PendingIntent mPendingIntent;
public BackgroundFetchTaskConsumer(Context context, TaskManagerUtilsInterface taskManagerUtils) {
super(context, taskManagerUtils);
}
//region TaskConsumerInterface
@Override
public String taskType() {
return "backgroundFetch";
}
@Override
public boolean canReceiveCustomBroadcast(String action) {
// Let the TaskService know that we want to receive custom broadcasts
// having "android.intent.action.BOOT_COMPLETED" action.
return Intent.ACTION_BOOT_COMPLETED.equals(action) || Intent.ACTION_MY_PACKAGE_REPLACED.equals(action);
}
@Override
public void didRegister(TaskInterface task) {
mTask = task;
}
@Override
public void didUnregister() {
// Stop an alarm.
stopAlarm();
// Cancel pending intent.
getTaskManagerUtils().cancelTaskIntent(getContext(), mTask.getAppId(), mTask.getName());
mTask = null;
mPendingIntent = null;
}
@Override
public void didReceiveBroadcast(Intent intent) {
String action = intent.getAction();
if (Intent.ACTION_BOOT_COMPLETED.equals(action) || Intent.ACTION_MY_PACKAGE_REPLACED.equals(action)) {
// Device has just been booted up - restore an alarm if "startOnBoot" option is enabled.
Map<String, Object> options = mTask.getOptions();
boolean startOnBoot = options.containsKey("startOnBoot") && (boolean) options.get("startOnBoot");
if (startOnBoot) {
startAlarm();
}
} else {
Context context = getContext();
TaskManagerUtilsInterface taskManagerUtils = getTaskManagerUtils();
if (context != null) {
taskManagerUtils.scheduleJob(context, mTask, null);
}
}
}
@Override
public boolean didExecuteJob(final JobService jobService, final JobParameters params) {
mTask.execute(null, null, new TaskExecutionCallback() {
@Override
public void onFinished(Map<String, Object> response) {
jobService.jobFinished(params, false);
}
});
// Returning `true` indicates that the job is still running, but in async mode.
// In that case we're obligated to call `jobService.jobFinished` as soon as the async block finishes.
return true;
}
//endregion
//region private methods
private AlarmManager getAlarmManager() {
Context context = getContext();
return context != null ? (AlarmManager) context.getSystemService(Context.ALARM_SERVICE) : null;
}
private int getIntervalMs() {
Map<String, Object> options = mTask != null ? mTask.getOptions() : null;
if (options != null && options.containsKey("minimumInterval")) {
// Given option is in seconds.
// It doesn't make much sense to offer millisecond accuracy since the interval is inexact.
return ((Number) options.get("minimumInterval")).intValue() * 1000;
}
return DEFAULT_INTERVAL_MS;
}
private void startAlarm() {
Context context = getContext();
AlarmManager alarmManager = getAlarmManager();
if (alarmManager == null) {
return;
}
int interval = getIntervalMs();
TaskManagerUtilsInterface taskManagerUtils = getTaskManagerUtils();
mPendingIntent = taskManagerUtils.createTaskIntent(context, mTask);
// Cancel existing alarm for this pending intent.
alarmManager.cancel(mPendingIntent);
Log.i(TAG, "Starting an alarm for task '" + mTask.getName() + "'.");
alarmManager.setInexactRepeating(
AlarmManager.ELAPSED_REALTIME_WAKEUP,
SystemClock.elapsedRealtime() + interval,
interval,
mPendingIntent
);
}
private void stopAlarm() {
AlarmManager alarmManager = getAlarmManager();
if (alarmManager != null && mPendingIntent != null) {
Log.i(TAG, "Stopping an alarm for task '" + mTask.getName() + "'.");
alarmManager.cancel(mPendingIntent);
}
}
//endregion
//region LifecycleEventListener
@Override
public void onHostResume() {
stopAlarm();
}
@Override
public void onHostPause() {
startAlarm();
}
@Override
public void onHostDestroy() {
// Stop an alarm if "stopOnTerminate" is set to true (default).
// Otherwise it should continue to work when the activity is terminated.
Map<String, Object> options = mTask.getOptions();
if (!options.containsKey("stopOnTerminate") || (boolean) options.get("stopOnTerminate")) {
stopAlarm();
}
}
//endregion
}