Programming Kotlin

Exception Handling

Many things can go wrong when making requests to web services, updating databases, accessing a file, and so on. When delegating a task to run asynchronously, we have to be defensive and handle failures gracefully. How we deal with exceptions depends on how we start a coroutine—using launch() or async().

Be Mindful of Structured Concurrency

Unless a scope is explicitly specified, coroutines run in the context and scope of their parent coroutines—called structured concurrency, where the hierarchical structure of coroutines matches the structure of code. This is a good thing as it’s easier to monitor and manage the execution of coroutines that we start. A coroutine doesn’t complete until all its children complete. But this also ...