October 2021
Intermediate to advanced
500 pages
16h 23m
English
Content preview from Kotlin Programming: The Big Nerd Ranch Guide, 2nd Edition
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Joining Jobs
With your producer and first worker in place, you are ready for an additional worker. Add a parameter to control the number of workers that you are allowed to use, then spin up additional worker coroutines. Also add two travelers to the list of passengers being tracked so there are more flights for your simulation.
Listing 22.7 Launching multiple workers (FlightWatcher.kt)
...
suspend fun fetchFlights(
passengerNames: List<String> = listOf("Madrigal", "Polarcubis",
"Estragon", "Taernyl"),
numberOfWorkers: Int = 2 ): List<FlightStatus> = coroutineScope { val passengerNamesChannel = Channel<String>() val fetchedFlightsChannel = Channel<FlightStatus>() launch { passengerNames.forEach { passengerNamesChannel.send(it) } ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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