Work, Work - WorkManager

Slided from my presentation on WorkManager at the DutchAUG IO Extended Extended meetup.

Transcript

1. Work, work - WorkManager Hugo Visser @botteaap hugo@littlerobots.nl
4. WorkManager Part of architecture components, JetPack Schedules & execute jobs “...intended for tasks that require a guarantee that the system will run them even if the app exits…”
5. Current options AlarmManager JobScheduler GCMNetworkManager FirebaseJobDispatcher
6. Current options AlarmManager → No system coordination, no constraints, throttled JobScheduler GCMNetworkManager FirebaseJobDispatcher
7. Current options AlarmManager → No system coordination, no constraints, no retries, throttled JobScheduler → API 21+, Coordination, constraints & retries, bugs < API 23 GCMNetworkManager FirebaseJobDispatcher
8. Current options AlarmManager → No system coordination, no constraints, no retries, throttled JobScheduler → API 21+, Coordination, constraints & retries, bugs < API 23 GCMNetworkManager → JobSchedulerCompat, but not quite FirebaseJobDispatcher
9. Current options AlarmManager → No system coordination, no constraints, no retries, throttled JobScheduler → API 21+, Coordination, constraints & retries, bugs < API 23 GCMNetworkManager → JobSchedulerCompat, but not quite FirebaseJobDispatcher → Pluggable schedulers, default: GCMNetworkManager
10. WorkManager Schedule jobs using constraints & retries JobScheduler on API 23+ AlarmManager or GCMNetworkManager through FJD < API 23
11. New features Reduce IPC → if a job is eligible to run immediately, no need to “schedule” it. Monitor status → LiveData providing job status Unique jobs Tags Output parameters Orchestration of multiple jobs
12. Orchestration B runs after A D runs after C E runs after B and D are completed
13. Unit of work: Worker import androidx.work.Worker class MyWorker: Worker() { override fun doWork(): Result { // do the hard work return Result.SUCCESS // or Result.FAILURE or Result.RETRY } }
14. Schedule // work-runtime-ktx gives us a nicer kotlin syntax val request = OneTimeWorkRequestBuilder<MyWorker>() .setConstraints(Constraints.Builder() .setRequiredNetworkType(NetworkType.CONNECTED) .build()) .build() // as of alpha4 getInstance() can return null! WorkManager.getInstance()!!.enqueue(request)
15. Monitor val status = WorkManager.getInstance()!!.getStatusById(request.id) status.observe(this, Observer { // WorkStatus can be null if the task id is invalid or gone it?.let { Log.d(TAG, "Task status: ${it.state}") } })
16. Next? API still in flux Asynchronous workers Try it out, file bugs https://issuetracker.google.com https://developer.android.com/topic/libraries/architecture/workmanager
17. Thanks! @botteaap hugo@littlerobots.nl speakerdeck.com/hugovisser