Am I doing this correctly? I am trying to catch t...

# coroutines

[anthonyeef]

Am I doing this correctly? I am trying to catch the exception if there is any occur when getting data from remote

async(UI) {
    val fetchDataJob = bg {
        ColumnRepo.getFromRemote(22352581)
    }

    val data = fetchDataJob.await()
    info(data.id.toString())
    if (fetchDataJob.isCompletedExceptionally) {
        doSomeThingWithException(fetchDataJob.getCompletionException())
    }
}

[gildor]

I don’t know what is bg (Anko?) but I recommend to use suspend version of such function, that returns value directly instead Job (like run{} from core of kotlinx.coroutines), such API looks more natural and less error prone (you never forget to call .await() because you shouldn’t do that at all)

[gildor]

so your result code will looks something like:

async(UI) {
   try {
     val data = fetchData(22352581)
     //or something like
     //val data = run(YourDispatcher) { ColumnRepo.getFromRemote(22352581) } 
     info(data.id.toString())
    } catch(e: Exception) { 
       doSomeThingWithException(e)
    }
}

[anthonyeef]

bg() is from Anko. And you are right, that await() make this single request more complecated

[gildor]

anko uses own dispatcher for bg calls. You can create you own or reuse CommonPool and replace bg{} with run(CommonPool) {} or to create your own shortcut
https://github.com/Kotlin/anko/blob/master/anko/library/generated/coroutines/src/bg.kt#L25