Structured Concurrency in Java

on YouTube ↗57m

" summary

Java 21’s structured concurrency is shown as a concrete replacement for raw executors using StructuredTaskScope and virtual threads, with a live demo that forks subtasks to resolve mocked IATA airport names and uses joinUntil with a 10s timeout. Code examples implement shutdownOnFailure (one child fails then interrupts others), shutdownOnSuccess (first success cancels remaining), result() and throwIfFailed, and a preview scoped values API for immutable per-scope data; warning: APIs are preview and not production stable.

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" chapters (13)

1. 0:00Introduction to structured concurrency
2. 1:47Concurrency problems and history
3. 8:12Parent-child task relationships
4. 16:24Why structured concurrency
5. 19:12Basic structured task scope
6. 25:22Never block without timeout
7. 31:48Shutdown on failure
8. 35:50Shutdown on success
9. 42:17Collecting results and exceptions
10. 45:10Real-world use cases
11. 47:58Key features and benefits
12. 49:24Scoped values overview
13. 56:57Summary and closing

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