Created
October 3, 2019 13:45
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import kotlinx.coroutines.CoroutineScope | |
import kotlinx.coroutines.channels.Channel | |
import kotlinx.coroutines.channels.ReceiveChannel | |
import kotlinx.coroutines.channels.SendChannel | |
import kotlinx.coroutines.delay | |
import kotlinx.coroutines.launch | |
import java.io.File | |
data class UploadResponse(val code: Int, | |
val message: String, | |
val file: File) | |
fun CoroutineScope.uploadWorker(files: ReceiveChannel<File>, | |
responses: SendChannel<UploadResponse>) { | |
launch { | |
for (file in files) { | |
println("upload file ${file.name} on thread ${Thread.currentThread().name}") | |
// this simulates the http client call | |
delay(2000) | |
responses.send(UploadResponse(200, "done", file)) | |
} | |
} | |
} | |
fun CoroutineScope.uploadResponseHandler(responses: ReceiveChannel<UploadResponse>) { | |
launch { | |
for (response in responses) { | |
println("got response with code ${response.code}") | |
} | |
} | |
} | |
fun CoroutineScope.uploader(files: ReceiveChannel<File>, | |
nrOfWorkers: Int = 3) { | |
val responses = Channel<UploadResponse>() | |
repeat(nrOfWorkers) { uploadWorker(files, responses) } | |
uploadResponseHandler(responses) | |
} |
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