Cancelling a Job, doesn't cancel the call

[Maikals]

Hi,
I'm trying to do a search field that everytime a letter is added, the coroutine job is cancelled and a new job born to do the new query to the service.
The thing is that when I cancel the Job, if there's some problem with the service call, the Exception is not managed by anyone, so, the app crashes.

I am building the coroutine like this:

fun executeAsync(params: Params, block: suspend CoroutineScope.(T) -> Unit,
                     blockError: (CustomException?) -> Unit) {
        job = launchAsync {
            val result = buildRepoCall(params)
            launchUI { block(result) }
        }
        job?.invokeOnCompletion {
            if (it != null) blockError(CustomException(it)) //The exception is managed here.
        }
    }

and this are the coroutine wrappers:

/**
     * Launch a coroutine in a new Thread.
     * @param block The block that will be executed inside coroutine
     */
    private fun launchAsync(block: suspend CoroutineScope.() -> Unit): Job =
            GlobalScope.async(Dispatchers.Default) {
                block()
            }

    /**
     * Launch a coroutine in the main thread.
     * @param block The block that will be executed inside coroutine
     */
    private fun launchUI(block: suspend CoroutineScope.() -> Unit): Job =
            GlobalScope.launch(Dispatchers.Main) {
                block()
            }

The buildRepoCall launches the retrofit call. At the end of the path, this functions does the call:

override suspend fun getSearchMoviesList(searchText: String, page: Int): MovieListEntity =
            MovieListMapper.toDomainObject(searchMoviesService
                    .createService().getSearchMovies(searchText, page).await())

Here I am doing the await to receive the data and transform it to a Domain Entity.

Thank you!

[JakeWharton]

Coroutine support is being moved into Retrofit directly where cancelation will be supported!

square/retrofit#2886