[Unit]
Description=Ekklesia Classroom messaging
Documentation=file:///usr/local/bin/classroom-mqtt
After=network-online.target
Wants=network-online.target
# Nothing in the classroom session requires this, and nothing waits for
# it. A broker outage must never reach the dock, the browser or boot.
StartLimitIntervalSec=0

[Service]
Type=simple
# The room's own user, so notifications reach the room's own session and
# the broker password is read by nothing with more privilege than that.
User=classroom
Group=classroom
ExecStart=/usr/local/bin/classroom-mqtt
# always, not on-failure. The link exits cleanly when it finds no broker
# configured, and on-failure means a machine that was set up before the
# church had a broker would never pick one up until somebody rebooted it.
# Reconnection while it is running is paho's own, with a backoff; this is
# only for the case where the process is not running at all.
Restart=always
RestartSec=10

[Install]
WantedBy=multi-user.target