#!/usr/bin/env bash
# Regenerates every file under docs/output/. Each broker is started, measured and left running
# only for its own group of tests, because three brokers do not fit comfortably in memory on a
# small machine at the same time.
#
# Required environment:
#   KAFKA_HOME     unpacked kafka_2.13-4.2.1
#   ERL_ROOT       an Erlang 24 installation      (RabbitMQ 3.10.x)
#   RABBITMQ_HOME  unpacked rabbitmq-server-generic-unix-3.10.25
#   PULSAR_HOME    unpacked apache-pulsar-4.2.4-bin
set -euo pipefail
cd "$(dirname "$0")/.."
mkdir -p docs/output

# Kafka needs no external broker for the measurements: spring-kafka-test starts a real KRaft
# broker in-process. KAFKA_HOME is only used by the footprint measurement.
mvn -B -Dgroups=kafka test 2>&1 | grep -E 'Running |Tests run:|BUILD ' > docs/output/tests.txt

scripts/rabbit-broker.sh
mvn -B -Dgroups=rabbit test 2>&1 | grep -E 'Running |Tests run:|BUILD ' >> docs/output/tests.txt

scripts/pulsar-broker.sh
mvn -B -Dgroups=pulsar test 2>&1 | grep -E 'Running |Tests run:|BUILD ' >> docs/output/tests.txt

{
  echo "== Operational footprint, measured on one 2-core / 3.8 GB Linux box =="
  echo
  echo "Each broker started from its shipped distribution with default configuration and a"
  echo "700 MB heap cap, on Temurin JDK 21. Times are one sample on a small box: treat them as"
  echo "orders of magnitude, not as a benchmark."
  echo
  scripts/footprint.sh kafka;  echo
  scripts/footprint.sh rabbit; echo
  scripts/footprint.sh pulsar
} > docs/output/footprint.txt

echo "regenerated:"; ls -1 docs/output