Async won't compile because of multiple implementations in source
I am trying to run the following code but it's not running because the compiler doesn't know which version of the async method to call. How do I tell it which one to call?
v
ar counter=0
val workerA=asyncIncrement(5000)
val workerB=asyncIncrement(100)
workerA.await()
workerB.await()
print("counter = $counter")
fun asyncIncrement(by:Int)=async
for(i in 1..by)
counter++
Just copy and paste the code into a scratch file or wherever and you should see the same compiler error
kotlin coroutine kotlinx.coroutines
asked Nov 14 '18 at 17:54
salyelasalyela
738
add a comment |
I am trying to run the following code but it's not running because the compiler doesn't know which version of the async method to call. How do I tell it which one to call?
v
ar counter=0
val workerA=asyncIncrement(5000)
val workerB=asyncIncrement(100)
workerA.await()
workerB.await()
print("counter = $counter")
fun asyncIncrement(by:Int)=async
for(i in 1..by)
counter++
Just copy and paste the code into a scratch file or wherever and you should see the same compiler error
kotlin coroutine kotlinx.coroutines
asked Nov 14 '18 at 17:54
salyelasalyela
738
add a comment |
I am trying to run the following code but it's not running because the compiler doesn't know which version of the async method to call. How do I tell it which one to call?
v
ar counter=0
val workerA=asyncIncrement(5000)
val workerB=asyncIncrement(100)
workerA.await()
workerB.await()
print("counter = $counter")
fun asyncIncrement(by:Int)=async
for(i in 1..by)
counter++
Just copy and paste the code into a scratch file or wherever and you should see the same compiler error
kotlin coroutine kotlinx.coroutines
asked Nov 14 '18 at 17:54
salyelasalyela
738
I am trying to run the following code but it's not running because the compiler doesn't know which version of the async method to call. How do I tell it which one to call?
v
ar counter=0
val workerA=asyncIncrement(5000)
val workerB=asyncIncrement(100)
workerA.await()
workerB.await()
print("counter = $counter")
fun asyncIncrement(by:Int)=async
for(i in 1..by)
counter++
Just copy and paste the code into a scratch file or wherever and you should see the same compiler error
kotlin coroutine kotlinx.coroutines
kotlin coroutine kotlinx.coroutines
asked Nov 14 '18 at 17:54
salyelasalyela
738
asked Nov 14 '18 at 17:54
salyelasalyela
738
asked Nov 14 '18 at 17:54
salyelasalyela
738
asked Nov 14 '18 at 17:54
salyelasalyela
738
asked Nov 14 '18 at 17:54
salyelasalyela
738
738
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
From Kotlin 1.3 you need to call async on a scope. In this example I have chosen
the GlobalScope. But it doesn't matter which scope you choose, you always have to explicitly import the asyncextension function;
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.async
import kotlinx.coroutines.runBlocking
import java.util.concurrent.atomic.AtomicInteger
fun main(args: Array<String>)
val counter=AtomicInteger(0)
fun asyncIncrement(by:Int)= GlobalScope.async
for(i in 1..by)
counter.incrementAndGet()
val workerA=asyncIncrement(5000)
val workerB=asyncIncrement(100)
runBlocking
workerA.await()
workerB.await()
print("counter = $counter")
BTW:
I changed the variable counter from int to an AtomicInteger because the two async blocks may run in different threads. And I introduced runBlocking, because await has to run in a suspend function.
answered Nov 14 '18 at 20:06
ReneRene
2,31128
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
From Kotlin 1.3 you need to call async on a scope. In this example I have chosen
the GlobalScope. But it doesn't matter which scope you choose, you always have to explicitly import the asyncextension function;
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.async
import kotlinx.coroutines.runBlocking
import java.util.concurrent.atomic.AtomicInteger
fun main(args: Array<String>)
val counter=AtomicInteger(0)
fun asyncIncrement(by:Int)= GlobalScope.async
for(i in 1..by)
counter.incrementAndGet()
val workerA=asyncIncrement(5000)
val workerB=asyncIncrement(100)
runBlocking
workerA.await()
workerB.await()
print("counter = $counter")
BTW:
I changed the variable counter from int to an AtomicInteger because the two async blocks may run in different threads. And I introduced runBlocking, because await has to run in a suspend function.
answered Nov 14 '18 at 20:06
ReneRene
2,31128
add a comment |
From Kotlin 1.3 you need to call async on a scope. In this example I have chosen
the GlobalScope. But it doesn't matter which scope you choose, you always have to explicitly import the asyncextension function;
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.async
import kotlinx.coroutines.runBlocking
import java.util.concurrent.atomic.AtomicInteger
fun main(args: Array<String>)
val counter=AtomicInteger(0)
fun asyncIncrement(by:Int)= GlobalScope.async
for(i in 1..by)
counter.incrementAndGet()
val workerA=asyncIncrement(5000)
val workerB=asyncIncrement(100)
runBlocking
workerA.await()
workerB.await()
print("counter = $counter")
BTW:
I changed the variable counter from int to an AtomicInteger because the two async blocks may run in different threads. And I introduced runBlocking, because await has to run in a suspend function.
answered Nov 14 '18 at 20:06
ReneRene
2,31128
add a comment |
From Kotlin 1.3 you need to call async on a scope. In this example I have chosen
the GlobalScope. But it doesn't matter which scope you choose, you always have to explicitly import the asyncextension function;
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.async
import kotlinx.coroutines.runBlocking
import java.util.concurrent.atomic.AtomicInteger
fun main(args: Array<String>)
val counter=AtomicInteger(0)
fun asyncIncrement(by:Int)= GlobalScope.async
for(i in 1..by)
counter.incrementAndGet()
val workerA=asyncIncrement(5000)
val workerB=asyncIncrement(100)
runBlocking
workerA.await()
workerB.await()
print("counter = $counter")
BTW:
I changed the variable counter from int to an AtomicInteger because the two async blocks may run in different threads. And I introduced runBlocking, because await has to run in a suspend function.
answered Nov 14 '18 at 20:06
ReneRene
2,31128
From Kotlin 1.3 you need to call async on a scope. In this example I have chosen
the GlobalScope. But it doesn't matter which scope you choose, you always have to explicitly import the asyncextension function;
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.async
import kotlinx.coroutines.runBlocking
import java.util.concurrent.atomic.AtomicInteger
fun main(args: Array<String>)
val counter=AtomicInteger(0)
fun asyncIncrement(by:Int)= GlobalScope.async
for(i in 1..by)
counter.incrementAndGet()
val workerA=asyncIncrement(5000)
val workerB=asyncIncrement(100)
runBlocking
workerA.await()
workerB.await()
print("counter = $counter")
BTW:
I changed the variable counter from int to an AtomicInteger because the two async blocks may run in different threads. And I introduced runBlocking, because await has to run in a suspend function.
answered Nov 14 '18 at 20:06
ReneRene
2,31128
edited Nov 15 '18 at 7:10
answered Nov 14 '18 at 20:06
ReneRene
2,31128
answered Nov 14 '18 at 20:06
ReneRene
2,31128
answered Nov 14 '18 at 20:06
ReneRene
2,31128
2,31128
add a comment |
add a comment |
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