Add structured-concurrency-final module: StructuredTaskScope final in JDK 28 (JEP 543), run on 28-ea, 27, 26 and 25

Runnable demos for the ankurm.com structured-concurrency-java article: the ExecutorService thread leak and its fix, every built-in Joiner, structure violations, timeouts, a custom Joiner, JSON thread dumps (in-process and jcmd), scoped values, javap diffs of the API on 25, 26, 27 and 28-ea, compiler output for six pieces of 25/26-era code, and the preview class-file trap between 27 and 28. Transcripts in output/. Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01CifR2BE7PBvRy5hT8TS9oz
2026-10-26 02:01:31 +00:00
parent 2e25042a68
commit c93a1fffbb
37 changed files with 1351 additions and 0 deletions
@@ -0,0 +1,10 @@
+$ javac src/Unstructured.java && java Unstructured     (28-beta+21-ea)
+handle() failed: java.lang.IllegalStateException: user service down
+handle() has returned. Waiting 400 ms to see what the other thread does:
+  fetchOrder() finished, although nobody wants the answer any more
+
+$ javac src/FailFast.java && java FailFast     (28-beta+21-ea)
+  fetchOrder() was interrupted
+handle() failed: java.lang.IllegalStateException: user service down
+handle() has returned. Waiting 400 ms to see what the other thread does:
+(nothing more happened)