hello, I got a prototype bean that is created at r...

# coroutines

[Dariusz Kuc]

hello, I got a prototype bean that is created at runtime based on some input parameters. Within the prototype bean I got multiple methods that accept value (and some others that dont) that should be computed just once (as it is pretty expensive). Since I don't want to incur the initialization penalty if I'm not going to be calling a method that needs it I was using by lazy. I'm migrating now to coroutines was wondering whats the proper way to update by lazy to call suspendable function. Any thoughts on how to make this better?

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[Mark]

I’m also interested in this. Did you find out anything? Maybe of interest: https://github.com/Kotlin/kotlinx.coroutines/issues/745

[Dariusz Kuc]

lazy delegation doesn't fit well into coroutine world

[Dariusz Kuc]

simplest equivalent is to just create lazy deferred, i.e. async(start = CoroutineStart.LAZY)

[Dariusz Kuc]

and just await on it from the places

[Dariusz Kuc]

with the example above it would simply become

[Dariusz Kuc]

private val myDeferred = GlobalScope.async(start = CoroutineStart.LAZY) {
        someSuspendableFunction(valueFromRuntime)
    }
    
    suspend fun functionA() = myAnotherService.firstMethod(myDeferred.await())
    suspend fun functionB() = myAnotherService.secondMethod(myDeferred.await())

[Dariusz Kuc]

*noted you probably want to create your own CoroutineScope instead of a global one