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 +1,20 @@
+$ java RandomTasks 5     (28-beta+21-ea)
+Duration: 487
+Duration: 92
+Duration: 474
+Duration: 424
+Duration: 506
+Result: 487
+Result: 92
+Result: 474
+Result: 424
+Result: 506
+
+$ java RandomTasks 3     (28-beta+21-ea)
+Duration: 734
+Duration: 660
+Duration: 210
+Duration: 581
+Duration: 128
+ExecutionException: TooSlowException: Duration 734 greater than threshold 700
+