56 lines
1.3 KiB
Shell
56 lines
1.3 KiB
Shell
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#!/bin/sh
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# Serves Photon on the database in /data/current (Halkyon Train's ADR 0030, D50), once
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# data.sh has brought one; and where data.sh has made a newer one (/data/next/ready),
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# stops Photon, puts the new one in the old one's place and starts it again: a
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# minute or two without search, once a month. PHOTON_HEAP is Java's heap (6g).
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set -eu
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cd /data
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heap=${PHOTON_HEAP:-6g}
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pid=
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start() {
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java "-Xmx$heap" -jar /app/photon.jar serve -data-dir /data/current \
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-listen-ip 0.0.0.0 -listen-port 2322 -max-results 20 &
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pid=$!
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}
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stop() {
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if [ -n "$pid" ]; then
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kill "$pid" 2>/dev/null || true
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wait "$pid" 2>/dev/null || true
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pid=
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fi
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}
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trap 'stop; exit 0' TERM INT
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swap() {
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[ -e next/ready ] || return 1
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rm -f next/ready
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rm -rf old
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if [ -d current ]; then mv current old; fi
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mkdir current
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mv next/photon_data current/photon_data
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mv next/fetched fetched
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rm -rf old
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}
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while [ ! -d current/photon_data ] && ! swap; do
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echo "No database yet; data.sh brings one."
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sleep 600 &
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wait $! || true
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done
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start
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while :; do
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sleep 3600 &
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wait $! || true
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if [ -e next/ready ]; then
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stop
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swap
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start
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echo "Photon serves the new database."
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elif ! kill -0 "$pid" 2>/dev/null; then
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echo "Photon stopped; started again." >&2
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start
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fi
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done
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