Firebase 作业服务启动延迟很大

Question

我正在测试接收 Firebase 云数据消息并在 Firebase 作业服务中处理它们的应用程序。在 FirebaseMessagingService 中接收消息会立即发生并且没有问题，但 Firebase 作业服务有时会延迟很长时间（5-10 分钟）启动，有时甚至根本不会启动。 dispatcher.schedule (myJob) 方法总是给出结果 SCHEDULE_RESULT_SUCCESS。这是作业调度功能：

// For long-running tasks (10 seconds or more) use Firebase Job Dispatcher.
Bundle bundle = new Bundle();
bundle.putInt(WatchDogService.REQUEST_ID, request.ordinal());
bundle.putString(REQUEST_PARAM, parameter);
FirebaseJobDispatcher dispatcher =
        new FirebaseJobDispatcher(new GooglePlayDriver(this));
Job myJob = dispatcher.newJobBuilder()
        .setService(LongJobService.class)
        .setTag("ua.ers.LongJobService")
        .setTrigger(Trigger.NOW)
        .setReplaceCurrent(true)
        .setExtras(bundle)
        .build();
int result = dispatcher.schedule(myJob);
Log.d(TAG, "Schedule result: " + result);

这是一个 Firebase 作业服务 class:

public class LongJobService extends JobService {
    private static final String TAG = "LongJobService";

    @Override
    public boolean onStartJob(final JobParameters jobParameters) {
        Log.d(TAG, "LongJobService started");    
        return true;
    }

    @Override
    public boolean onStopJob(JobParameters jobParameters) {
        Log.d(TAG, "LongJobService stopped");
        return false;
    }
}

请告诉我，问题的原因可能是什么？

Answer 1

根据文档，这只是通常的行为

The scheduler backend is encouraged to use the windowEnd value as a signal that the job should be run, but this is not an enforced behavior.

但为了更好的执行尝试

Trigger.executionWindow(0, 0)

而不是

Trigger.NOW

所以它看起来像

Job myJob = dispatcher.newJobBuilder()
.setService(Service.class)
.setRecurring(true) // if task is periodic, else pass "false"
.setTrigger(Trigger.executionWindow(0, 0))
.setTag("tag")
.build();

Firebase 作业服务启动延迟很大

Firebase job service started with big delay

android

firebase

firebase-cloud-messaging

firebase-job-dispatcher

jobservice