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
13 lines
606 B
Java
13 lines
606 B
Java
import java.util.List;
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import java.util.concurrent.*;
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import java.util.concurrent.StructuredTaskScope.Joiner;
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import java.util.concurrent.StructuredTaskScope.Subtask;
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/** A custom Joiner as written for JDK 26: two type parameters and onTimeout(). */
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public class OldJoiner<T> implements Joiner<T, List<T>> {
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private final java.util.Queue<T> results = new ConcurrentLinkedQueue<>();
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public boolean onComplete(Subtask<T> s) { if (s.state() == Subtask.State.SUCCESS) results.add(s.get()); return false; }
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public void onTimeout() { }
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public List<T> result() { return List.copyOf(results); }
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}
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