#!/usr/bin/env bash
# Start a real Apache Pulsar broker with no Docker and no root.
#
# The standalone distribution bundles ZooKeeper, BookKeeper and the broker in one process, which
# is why a single tarball is enough. -nss skips the stream storage (BookKeeper's table service,
# needed only by stateful Pulsar Functions) and -nfw skips the functions worker; both save
# several hundred megabytes of heap and a few seconds of startup.
#
# PULSAR_HOME must point at an unpacked apache-pulsar-<version>-bin directory. Pulsar 4.2
# supports Java 17 and 21; the transcripts here were produced on Temurin 21.
set -eu
: "${PULSAR_HOME:?set PULSAR_HOME to an unpacked apache-pulsar-*-bin directory}"
export PULSAR_MEM="${PULSAR_MEM:--Xms384m -Xmx700m -XX:MaxDirectMemorySize=384m}"

cd "$PULSAR_HOME"
setsid nohup bin/pulsar standalone -nss -nfw > /tmp/pulsar-start.log 2>&1 < /dev/null &
for _ in $(seq 1 90); do
  if [ "$(curl -s -o /dev/null -w '%{http_code}' http://127.0.0.1:8080/admin/v2/brokers/version)" = "200" ]; then
    echo "broker ready on 6650 (admin 8080), version $(curl -s http://127.0.0.1:8080/admin/v2/brokers/version)"
    exit 0
  fi
  sleep 2
done
echo "broker did not start; see /tmp/pulsar-start.log" >&2
exit 1