kotlinx-coroutines-core / kotlinx.coroutines.experimental / CompletionHandler

CompletionHandler

typealias CompletionHandler = (cause: Throwable?) -> Unit (source)

Handler for Job.invokeOnCompletion.

Installed handler should not throw any exceptions. If it does, they will get caught, wrapped into CompletionHandlerException, and rethrown, potentially causing crash of unrelated code.

Note: This type is a part of internal machinery that supports parent-child hierarchies and allows for implementation of suspending functions that wait on the Job’s state. This type should not be used in general application code. Implementations of CompletionHandler must be fast and lock-free.