androidandroid-workmanagerworkmanagers

How to queue tasks for Worker (WorkerManager API)?

I have a chain of requests 

fun foo(){
....
WorkManager.getInstance(iC)
            .beginWith(downloadWorkRequest)
            .then(unzipWorkRequest)
            .then(deleteWorkRequest)
            .enqueue()
 .....
 }

This whole task (let's say) take 1 minute... Problem is that if I call this method a few times (for example 4 times) in one minute, so WorkManager really will start this task 4 times asynchronously.

I need that all this tasks will be executed synchronously (like queue).

How to do it?

Solution

  • You can use a unique work in this case with a ExistingWorkPolicy.APPEND

    fun foo(){
....
WorkManager.getInstance(iC)
           .beginUniqueWork(
               "my_unique_work_name",
               ExistingWorkPolicy.APPEND,
               downloadWorkRequest)
           .then(unzipWorkRequest)
           .then(deleteWorkRequest)
           .enqueue()
 .....
 }

    You can find an example of this in the WorkManager codelab.