#!/bin/sh
# -*- sh -*-

# load the munin plugin helper
. $MUNIN_LIBDIR/plugins/plugin.sh

# if no workingDirectory has been configures
if [ ! $workingDirectory ]; then
	# exit with an error
	echo "no workingDirectory configured" >&2
	exit 1
fi

# path to osmosis binary
[ $osmosis ]  || osmosis="osmosis"

# configuration section
if [ "$1" = "config" ]; then

	echo 'graph_title OSM PostGIS Database Replag'
	echo 'graph_args --base 1000'
	echo 'graph_vlabel seconds behind main database'
	echo 'graph_category osm'
	
	echo 'lag.label replication lag'
	echo 'lag.draw LINE'
	
	exit 0
fi

# invoke osmosis to calculate the replication lag
lag=$($osmosis --read-replication-lag workingDirectory="$workingDirectory" 2>/dev/null)
echo "lag.value $lag"

exit 0