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2026-11-06 21:43:41 +05:30
parent 11782a7ec3
commit c92977b23d
38 changed files with 2006 additions and 0 deletions
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+#!/usr/bin/env bash
+# Regenerates every file in gatling-spring-boot/output/.
+# Needs JDK 25 and Maven on the PATH and python3 (standard library only).
+# k6 is optional: set K6=/path/to/k6 or have it on the PATH; without it the k6 steps are skipped.
+# Takes about 6 minutes: no single load run is longer than ~70 seconds.
+set -euo pipefail
+cd "$(dirname "$0")/.."
+
+PORT="${PORT:-18300}"
+export APP_URL="http://localhost:${PORT}"
+K6="${K6:-$(command -v k6 || true)}"
+OUT=output
+JAR=target/gatling-spring-boot-lab-1.0.0.jar
+
+# keep transcripts free of JVM launcher noise that varies per machine
+filter() { grep -vE '^(Picked up JAVA_TOOL_OPTIONS|WARNING: )' || true; }
+
+rm -f "$OUT"/*.txt "$OUT"/*.json "$OUT"/*.svg
+mkdir -p "$OUT"
+
+# 1. unit test: the capacity limit the whole post relies on (writes output/01-saturation-test.txt)
+mvn -B -q clean test 2>&1 | filter
+
+# 2. build and start the app under test
+mvn -B -q package -DskipTests 2>&1 | filter
+mkdir -p target/k6
+PORT="$PORT" java -jar "$JAR" > target/app.log 2>&1 &
+APP_PID=$!
+trap 'kill $APP_PID 2>/dev/null || true' EXIT
+for _ in $(seq 1 60); do
+  curl -fs "$APP_URL/api/stats" > /dev/null 2>&1 && break
+  sleep 1
+done
+curl -fs "$APP_URL/api/quote/ORCL" > "$OUT/02-single-request.txt"; echo >> "$OUT/02-single-request.txt"
+
+# 3. Gatling runs, one simulation per mvn invocation
+gatling() {  # <output file> <simulation class>
+  mvn -B test-compile gatling:test -Dgatling.simulationClass="lab.gatling.$2" 2>&1 | filter > "$OUT/$1"
+}
+gatling 03-basic-console.txt BasicSimulation
+gatling 04-knee-steps-console.txt KneeStepsSimulation
+python3 scripts/analyze.py gatling "$(ls -dt target/gatling/kneestepssimulation-* | head -1)"
+gatling 06-knee-ramp-console.txt KneeRampSimulation
+gatling 07-closed-model-console.txt ClosedModelSimulation
+
+# 4. the run that must fail the build; keep going, record Maven's exit code
+set +e
+gatling 05-failing-assertion-console.txt FailingAssertionSimulation
+echo "maven exit code: ${PIPESTATUS[0]}" > "$OUT/05b-failing-assertion-exit.txt"
+set -e
+
+# 5. k6, same app, same profile
+if [ -n "$K6" ]; then
+  "$K6" version > "$OUT/20-k6-version.txt"
+  "$K6" run --quiet --out json=target/k6/knee.json k6/knee.js > "$OUT/22-k6-knee-console.txt" 2>&1
+  python3 scripts/analyze.py k6 target/k6/knee.json
+  set +e
+  "$K6" run --quiet k6/threshold-fail.js > "$OUT/23-k6-threshold-fail-console.txt" 2>&1
+  echo "k6 exit code: $?" > "$OUT/23b-k6-threshold-fail-exit.txt"
+  set -e
+else
+  echo "k6 not found: skipping k6 steps" >&2
+fi
+
+python3 scripts/analyze.py chart
+echo "done: $(ls "$OUT" | wc -l) files in $OUT/"