#!/bin/bash
#
# This shell script takes care of starting and stopping Geoserver deployed in Apache Tomcat
# It also handles killing Geoserver in case it doesn’t stop gracefully
# It uses a PID file to determine the process ID so it should work with multiple Tomcat instances on one server
# Just copy the script and change $INSTANCE variable to run multiple Geoserver instances
# Tested on Ubuntu 12.04
#
# chkconfig: - 80 20
#
### BEGIN INIT INFO
# Provides: Geoserver
# Required-Start: $network $syslog
# Required-Stop: $network $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Description: Geoserver service
# Short-Description: start and stop tomcat
### END INIT INFO
#
# Author dragan.podvezanec@gmail.com
#
# Based on work by Yoryos Valotasios


# Geoserver configuration section
INSTANCE=1
USER=geoserver
GEOSERVER_DATA_DIR=/home/geoserver/data_dir
GEOSERVER_HOME=/home/geoserver/geoserver$INSTANCE

export GEOSERVER_DATA_DIR=$GEOSERVER_DATA_DIR
export GEOSERVER_HOME=$GEOSERVER_HOME

# Uncomment this if you need custom logging location
#export GEOSERVER_LOG_LOCATION=$GEOSERVER_HOME/logs/geoserver.log

# Java configuration section
JAVA_HOME=/home/geoserver/jre
JAVA_OPTS="-Xms256m -Xmx2048m -XX:+UseParallelGC -XX:+UseParallelOldGC"
CATALINA_PID=/var/run/geoserver$INSTANCE.pid

export JAVA_HOME=$JAVA_HOME
export JAVA_OPTS=$JAVA_OPTS
export CATALINA_PID=$CATALINA_PID
export PATH=$JAVA_HOME/bin:$PATH
# End configuration section

# Number of seconds to wait after nicely requesting stop
SHUTDOWN_WAIT=10

geoserver_pid(){
        echo `ps aux | grep org.apache.catalina.startup.Bootstrap | grep $GEOSERVER_HOME | grep -v grep | awk '{ print $2 }'`
}

start() {
pid=$(geoserver_pid)
if [ -n "$pid" ]
then
echo "Geoserver is already running (pid: $pid)"
else

echo "Starting Geoserver"
touch $CATALINA_PID
chown $USER $CATALINA_PID
/bin/su -p -s /bin/sh $USER $GEOSERVER_HOME/bin/startup.sh
echo "Started Geoserver with next variables:" 
echo "GEOSERVER_HOME=$GEOSERVER_HOME"
echo "GEOSERVER_DATA_DIR=$GEOSERVER_DATA_DIR"
echo "Geoserver PID is: $(geoserver_pid)"
fi

return 0
}

stop() {
pid=$(geoserver_pid)
if [ -n "$pid" ]
then
/bin/su -p -s /bin/sh $USER $GEOSERVER_HOME/bin/shutdown.sh
echo -n "Stopping Geoserver"

let kwait=$SHUTDOWN_WAIT
count=0;
until [ `ps -p $pid | grep -c $pid` = '0' ] || [ $count -gt $kwait ]
do
echo -n ".";
sleep 1
let count=$count+1;
done

if [ $count -gt $kwait ]; then
echo "process is still running after $SHUTDOWN_WAIT seconds, killing process"
kill $pid
sleep 3

# if it’s still running use kill -9
if [ `ps -p $pid | grep -c $pid` -gt '0' ]; then
echo "process is still running, using kill -9"
kill -9 $pid
sleep 3
fi

fi

if [ `ps -p $pid | grep -c $pid` -gt '0' ]; then
echo "process is still running, I give up"
else
# success, delete PID file
rm $CATALINA_PID
fi
else
echo "Geoserver $INSTANCE is not running"
fi
return 0
}

case $1 in
start)
start
;;
stop)
stop
;;
restart)
stop
start
;;
status)
pid=$(geoserver_pid)
if [ -n "$pid" ]
then
echo "Geoserver $INSTANCE is running with pid: $pid"
else
echo "Geoserver $INSTANCE is not running"
fi
;;
esac
exit 0