cow: CopyOnWriteArrayList - deterministic iterator-snapshot and synchronizedList CME demos, JMH read/write throughput, and the addLast/removeFirst fix for a real concurrent-writer race

cow/scripts/run-all.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -euo pipefail
+cd "$(dirname "$0")/.."
+
+mvn -q -B compile
+
+java -cp target/classes com.ankurm.cow.IteratorSnapshotDemo 2>&1 \
+  | grep -vE 'JAVA_TOOL_OPTIONS|^WARNING' > output/01-iterator-snapshot-demo.txt
+java -cp target/classes com.ankurm.cow.SynchronizedListCmeDemo 2>&1 \
+  | grep -vE 'JAVA_TOOL_OPTIONS|^WARNING' > output/02-synchronizedlist-cme-demo.txt
+
+mvn -q -B test
+cp target/surefire-reports/com.ankurm.cow.CowClaimsTest.txt output/03-tests.txt
+
+mvn -q -B package -DskipTests
+java -jar target/benchmarks.jar ReadThroughputBenchmark -rf text -rff output/04-read-throughput-jmh.txt
+java -jar target/benchmarks.jar WriteThroughputBenchmark -rf text -rff output/05-write-throughput-jmh.txt
+
+echo "Regenerated output/01-05. output/06-write-throughput-race.txt is a one-off captured failure"
+echo "from an earlier, deliberately buggy version of the write benchmark - see the README - and"
+echo "is NOT regenerated by this script."

cow/scripts/run.sh

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+#!/usr/bin/env bash
+# Run one of the demo classes ad hoc, e.g.: ./scripts/run.sh IteratorSnapshotDemo
+set -euo pipefail
+cd "$(dirname "$0")/.."
+mvn -q -B compile
+java -cp target/classes "com.ankurm.cow.$1"