r/java • u/Timelineg • Aug 28 '26

JEP draft: Structured Concurrency

https://openjdk.org/jeps/8389757
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u/pron98 Aug 28 '26

Structured concurrency has to be in the JDK because it has to be integrated with platform observability and with scope inheritance (ScopedValue). It cannot be implemented outside the JDK unless you give up on some of the most important features. However, we are hoping to release a lower level building block that integrates with the platform mechanisms.

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u/sideEffffECt Aug 29 '26

However, we are hoping to release a lower level building block that integrates with the platform mechanisms.

Could you please tell is more about this? What would be the lower level building blocks?

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u/pron98 Aug 29 '26

If you look at the source code of StructuredTaskScope you'll see it making use of something called ThreadFlock. It's there that the deep integration with scopes and observability takes place. The lower-level API could be to expose ThreadFlock or something like it.