asmhatreandClaude Sonnet 5
55ee850a75
One three-round worker pipeline implemented with CountDownLatch (one latch per round), CyclicBarrier (reusable, with a barrier action), and Phaser (reusable, plus dynamic mid-run registration), alongside Semaphore solving the genuinely different problem of bounding concurrent access. Covers timeout behavior (CyclicBarrier permanently breaks on one timeout, Phaser doesn't) and virtual-thread compatibility, including the corrected finding that Object.wait() releases its monitor and never pinned, unlike Thread.sleep() inside synchronized. Co-Authored-By: Claude Sonnet 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01FhzLY5p6okFva3qsnsRyvM
70 lines
2.9 KiB
Bash
Executable File
70 lines
2.9 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Regenerates every file in output/. Requires:
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# - JDK25_HOME pointing at a JDK 24+ install (this repo used Temurin 25.0.4.1+1)
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# - JDK21_HOME pointing at a pre-JDK-24 install (this repo used OpenJDK 21.0.10), for the
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# virtual-thread pinning contrast at the end
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set -euo pipefail
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cd "$(dirname "$0")/.."
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: "${JDK25_HOME:?Set JDK25_HOME to a JDK 24+ install}"
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: "${JDK21_HOME:?Set JDK21_HOME to a pre-JDK-24 install}"
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mkdir -p target/classes target/classes-21
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"$JDK25_HOME/bin/javac" --release 25 -d target/classes $(find src/main/java -name "*.java")
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"$JDK21_HOME/bin/javac" --release 21 -d target/classes-21 $(find src/main/java -name "*.java")
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echo "--- 01: CountDownLatch pipeline ---"
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{
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echo '$ java CountDownLatchPipeline'
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echo ""
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"$JDK25_HOME/bin/java" -cp target/classes com.ankurm.synchronizers.CountDownLatchPipeline 2>&1 | grep -v "Picked up"
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} > output/01-countdownlatch-pipeline.txt
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echo "--- 02: CyclicBarrier pipeline ---"
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{
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echo '$ java CyclicBarrierPipeline'
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echo ""
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"$JDK25_HOME/bin/java" -cp target/classes com.ankurm.synchronizers.CyclicBarrierPipeline 2>&1 | grep -v "Picked up"
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} > output/02-cyclicbarrier-pipeline.txt
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echo "--- 03: Phaser pipeline (dynamic registration) ---"
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{
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echo '$ java PhaserPipeline'
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echo ""
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"$JDK25_HOME/bin/java" -cp target/classes com.ankurm.synchronizers.PhaserPipeline 2>&1 | grep -v "Picked up"
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} > output/03-phaser-pipeline.txt
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echo "--- 04: Semaphore resource guard ---"
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{
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echo '$ java SemaphoreResourceGuard'
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echo ""
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"$JDK25_HOME/bin/java" -cp target/classes com.ankurm.synchronizers.SemaphoreResourceGuard 2>&1 | grep -v "Picked up"
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} > output/04-semaphore-resource-guard.txt
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echo "--- 05: timeout behavior across all four ---"
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{
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echo '$ java TimeoutBehaviorDemo'
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echo ""
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"$JDK25_HOME/bin/java" -cp target/classes com.ankurm.synchronizers.TimeoutBehaviorDemo 2>&1 | grep -v "Picked up"
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} > output/05-timeout-behavior.txt
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echo "--- 06: virtual-thread compatibility, all four, on JDK21 (pre-JEP-491) ---"
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{
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echo '$ java -Djdk.tracePinnedThreads=full VirtualThreadCompatibilityDemo (pre-JDK-24 runtime)'
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echo ""
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"$JDK21_HOME/bin/java" -Djdk.tracePinnedThreads=full -cp target/classes-21 \
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com.ankurm.synchronizers.VirtualThreadCompatibilityDemo 2>&1 | grep -v "Picked up"
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echo ""
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echo '$ java -Djdk.tracePinnedThreads=full SynchronizedWaitPinsDemo (pre-JDK-24 runtime, contrast case)'
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echo ""
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"$JDK21_HOME/bin/java" -Djdk.tracePinnedThreads=full -cp target/classes-21 \
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com.ankurm.synchronizers.SynchronizedWaitPinsDemo 2>&1 | grep -v "Picked up"
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} > output/06-virtual-thread-compatibility.txt
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echo "--- 07: correctness tests ---"
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"$JDK25_HOME/bin/java" --version > /dev/null # sanity
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(cd "$(pwd)" && JAVA_HOME="$JDK25_HOME" mvn -q -f pom.xml test 2>&1 | grep -v "Picked up\|WARNING" || true)
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cp target/surefire-reports/com.ankurm.synchronizers.RoundOrderingCorrectnessTest.txt output/07-round-ordering-correctness.txt
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echo "Done. See output/."
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