Timeouts in structured concurrency

[Alan Bateman]

On 18/12/2025 21:00, David Alayachew wrote:
> :
>
> That said, if you dislike a 0 parameter call being forced into being a 
> 2 paramefer call when you need to add timeout, then sure, I think 
> adding an overload for that static method that takes in the 
> configFunction is reasonable. I'd support that.
>
The no-arg open method is the only method uses the default configuration 
and the "default" policy/joiner. We held back from adding a 1-arg open 
method that takes a configuration function as it doubles down on the 
defaults. We are confident that the "all of nothing" case is the most 
important case, and this means the scope will be cancelled if any 
subtask fails.  It is harder to get a sense as to whether subtasks 
produce results of the same type or different types, that is what 
determines if the default is allSuccessfulOrThrow [1] or 
awaitAllSuccessfulOrThrow [2].

-Alan

[1] 
https://download.java.net/java/early_access/jdk26/docs/api/java.base/java/util/concurrent/StructuredTaskScope.Joiner.html#allSuccessfulOrThrow()
[2] 
https://download.java.net/java/early_access/jdk26/docs/api/java.base/java/util/concurrent/StructuredTaskScope.Joiner.html#awaitAllSuccessfulOrThrow()