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package org.thoughtcrime.securesms.jobmanager;
import android.app.AlarmManager;
import android.app.Application;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.support.annotation.NonNull;
import com.annimon.stream.Stream;
import org.thoughtcrime.securesms.ApplicationContext;
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import network.loki.messenger.BuildConfig;
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import org.thoughtcrime.securesms.logging.Log;
import java.util.List;
import java.util.UUID;
/**
* Schedules tasks using the {@link AlarmManager}.
*
* Given that this scheduler is only used when {@link KeepAliveService} is also used (which keeps
* all of the {@link ConstraintObserver}s running), this only needs to schedule future runs in
* situations where all constraints are already met. Otherwise, the {@link ConstraintObserver}s will
* trigger future runs when the constraints are met.
*
* For the same reason, this class also doesn't have to schedule jobs that don't have delays.
*
* Important: Only use on API < 26.
*/
public class AlarmManagerScheduler implements Scheduler {
private static final String TAG = AlarmManagerScheduler.class.getSimpleName();
private final Application application;
AlarmManagerScheduler(@NonNull Application application) {
this.application = application;
}
@Override
public void schedule(long delay, @NonNull List<Constraint> constraints) {
if (delay > 0 && Stream.of(constraints).allMatch(Constraint::isMet)) {
setUniqueAlarm(application, System.currentTimeMillis() + delay);
}
}
private void setUniqueAlarm(@NonNull Context context, long time) {
AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(context, RetryReceiver.class);
intent.setAction(BuildConfig.APPLICATION_ID + UUID.randomUUID().toString());
alarmManager.set(AlarmManager.RTC_WAKEUP, time, PendingIntent.getBroadcast(context, 0, intent, 0));
Log.i(TAG, "Set an alarm to retry a job in " + (time - System.currentTimeMillis()) + " ms.");
}
public static class RetryReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Log.i(TAG, "Received an alarm to retry a job.");
ApplicationContext.getInstance(context).getJobManager().wakeUp();
}
}
}