CompletableDeferred<Any>() Cancelation

This code not cancelling. How can i handle this.

fun main(args: Array<String>) = runBlocking<Unit> {
    
    launch {
        getUsers().await()
    }
    
    coroutineContext.cancel()
    
}


fun getUsers(): Deferred<String> {
    
    val call = OkHttpClient.Builder().build().newCall(Request.Builder()
            .url("https://jsonplaceholder.typicode.com/users")
            .build())

    val def = CompletableDeferred<String>()
    
    def.invokeOnCompletion {
        println(def)
    }

    call.enqueue(object : Callback {
        override fun onResponse(call: Call, response: Response) {
            //Not important
        }

        override fun onFailure(call: Call, e: IOException) {
            //Not important
        }

    })

    return def
}

[fvasco]

Dit it cancel the okhtpp call?

Should it do? To cancel the call you have to invoke the cancel method on it.

I strongly suggest you to read the documentation

https://github.com/Kotlin/kotlin-coroutines/blob/master/kotlin-coroutines-informal.md#wrapping-callbacks

Finally consider the code:

suspend fun Request.call(): Response = suspendCancellableCoroutine { continuation ->
    val call = OkHttpClient.Builder().build().newCall(this)
    call.enqueue(object : Callback {
        override fun onResponse(call: Call, response: Response) = continuation.resume(response)
        override fun onFailure(call: Call, e: IOException) = continuation.resumeWithException(e)
    })

    continuation.invokeOnCancellation {
        call.cancel()
    }
}

[elizarov]

@fvasco Thanks for answering!