Method doWork() not calling with WorkManager

Question

I need to upload file from device to my app. I use WorkManager to do it in background.

After updating library from android.arch.work:work-runtime:1.0.0-alpha04 to androidx.work:work-runtime:2.0.0 something goes wrong.

Method doWork() not calling in my UploadFileTask(workerParams: WorkerParameters) : Worker(Application.getContext(), workerParams)

Here is how I run my uploading:

fun upload(id: String, file: File, params: FileStorage.DocParams?, additionalTag: String): File {
    cancelUploadIfWas(file)
    fileStorage.save(file, params)
    val inputData = Data.Builder().putString(FileTask.PATH_KEY, file.path).build()
    val uploadWork = OneTimeWorkRequest.Builder(UploadFileTask::class.java)
        .addTag(ID_PREFIX + id)
        .addTag(PATH_PREFIX + file.path)
        .addTag(UPLOAD_TAG)
        .addTag(additionalTag)
        .keepResultsForAtLeast(0, TimeUnit.SECONDS)
        .setInputData(inputData)
        .build()

    workManager.enqueue(uploadWork)
    file.uploadStatus.onLoading()
    file.uploadWork=uploadWork
    uploadingFiles.put(ID_PREFIX + id, file)
    workManager.getWorkInfoByIdLiveData(uploadWork.id).observe(this, uploadObserver)
    return file
}

But my uploadObserver receives State.FAILED exactly after State.ENQUEUED

What I'm doing wrong?

Answer 1

Solved

The trick was in that we have to create out task by this way:

UploadFileTask(context: Context, workerParams: WorkerParameters) : Worker(context, workerParams)

The constructor of our task have to receive exactly two parameters: context: Context and workerParams: WorkerParameters

Explanation:

val downloadWork = OneTimeWorkRequest.Builder(downloadingTask)
            .addTag(ID_TAG)
            .keepResultsForAtLeast(0, TimeUnit.SECONDS)
            .build()

workManager.enqueue(downloadWork)

WorkManager expects to receive downloadWork which was biult with downloadingTask, that has exactly two params in its constructor