Claude
c93a1fffbb
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
16 lines
694 B
Java
16 lines
694 B
Java
import java.time.Duration;
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import java.util.concurrent.StructuredTaskScope;
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/** The JDK 25/26 timeout exception. In 27 the scope throws ExecutionException with a CancelledByTimeoutException cause. */
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public class OldTimeoutException {
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public static void main(String[] args) throws Exception {
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try (var scope = StructuredTaskScope.open(StructuredTaskScope.Joiner.<String>awaitAllSuccessfulOrThrow(),
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cf -> cf.withTimeout(Duration.ofMillis(50)))) {
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scope.fork(() -> { Thread.sleep(1000); return "late"; });
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scope.join();
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} catch (StructuredTaskScope.TimeoutException e) {
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System.out.println("timed out");
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}
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}
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}
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