How to handle timeouts?#
Unis are often used to represent asynchronous operations, like making an HTTP call. So, it’s not rare to need to add a timeout or a deadline on this kind of operation. If we don’t get a response (receive an item in the Mutiny lingo) before that deadline, we consider that the operation failed.
We can then recover from this failure by using a fallback value, retrying, or any other failure handling strategy.
To configure a timeout use
When the deadline is reached, you can do various actions. First you can simply fail:
TimeoutException is propagated in this case.
So you can handle it specifically in the downstream:
You can also pass a custom exception:
Failing and recovering might be inconvenient.
So, you can pass a fallback item or