#!/bin/bash
#
# init script for a Java application
#

function update_monitor() {
	COMPONENT=$1
	STATUS=$2
	if [[ -f ${POLICY_HOME}/etc/monitor/monitor.cfg ]]; then
		/bin/sed -i.bak \
			-e "s/^${COMPONENT}=.*/${COMPONENT}=${STATUS}/g" \
			${POLICY_HOME}/etc/monitor/monitor.cfg	
	fi
}

# unmonitored start, does not change monitor status (immutable)
function um_start() {
	JMX_JAVA_OPTS="-Dcom.sun.management.jmxremote"
	JMX_JAVA_OPTS="${JMX_JAVA_OPTS} -Dcom.sun.management.jmxremote.port=${LOGPARSER_JMX_PORT}"
	JMX_JAVA_OPTS="${JMX_JAVA_OPTS} -Dcom.sun.management.jmxremote.ssl=false" 
	JMX_JAVA_OPTS="${JMX_JAVA_OPTS} -Dcom.sun.management.jmxremote.authenticate=false"
	JVM_JAVA_OPTS="-Xms${LOGPARSER_X_MS_MB}M -Xmx${LOGPARSER_X_MX_MB}M"
	
	CMD_JAVA_OPTS="-DPOLICY_LOGS=${POLICY_LOGS}"

	JAVA_OPTS="${JAVA_OPTS} ${JMX_JAVA_OPTS} ${JVM_JAVA_OPTS} ${CMD_JAVA_OPTS}"
	
	# Redirects default and error output to a log file
	cd ${POLICY_HOME}/servers/${COMPONENT}/bin
	mkdir -p ${POLICY_LOGS}/policy/${COMPONENT} 2>/dev/null
	nohup $JAVA_HOME/bin/java -jar ${JAVA_OPTS} ${SERVICE} ${SERVER} ${LOGTYPE} >> ${POLICY_LOGS}/policy/${COMPONENT}/stdout 2>&1 &
RETVAL=$?
	RETVAL=$?	
}

# Starts the application
function start() {
	um_start
	if [[ ${RETVAL} != 0 ]]; then
		update_monitor ${COMPONENT} off
	else
		update_monitor ${COMPONENT} on
	fi
}

# unmonitored stop, does not change monitor status (immutable)
function um_stop() {
	# Kills the application process
	pkill -u ${POLICY_USER} -f "${SERVICE} ${SERVER} ${LOGTYPE}" -TERM
	RETVAL=$?
	if [[ ${RETVAL} != 0 ]]; then
		sleep 2
		pkill -u ${POLICY_USER} -f "${SERVICE} ${SERVER} ${LOGTYPE}" -KILL
		RETVAL=$?
    fi	
}

# Stops the application
function stop() {
	um_stop
    update_monitor ${COMPONENT} off	
}

# Show the application status
function status() {
	# check status
	pid=$(pgrep -f -u ${POLICY_USER} "${SERVICE} ${SERVER} ${LOGTYPE}" 2> /dev/null)
	RETVAL=$?
	
	# If the PID was returned means the application is running
	if [ ${RETVAL} -eq 0 ] ; then
		echo "running with pid ${pid}"
	else
		echo "stopped"
	fi
}

# Main logic, a simple case to call functions

# determine if this is a paplp or pdplp component
COMPONENT=$(basename $0)

CONF_FILE="${POLICY_HOME}/servers/${COMPONENT}/bin/parserlog.properties"
SERVICE="${POLICY_HOME}/servers/${COMPONENT}/bin/logparser.jar"

# read properties
shopt -s extglob
configfile="dos_or_unix" # set the actual path name of your (DOS or Unix) config file
while IFS='= ' read lhs rhs
do
    if [[ ! $lhs =~ ^\ *# && -n $lhs ]]; then
        rhs="${rhs%%\#*}"    # Del in line right comments
       	 rhs="${rhs%%*( )}"   # Del trailing spaces
        rhs="${rhs%\"*}"     # Del opening string quotes 
       	 rhs="${rhs#\"*}"     # Del closing string quotes
       	 if [[ $lhs != *"."* ]]; then
       	 	declare $lhs="$rhs"
       	 fi
   fi
done < "${CONF_FILE}"
if [ $? -ne 0 ]; then
	echo "error: cannot source configuration ${CONF_FILE}"
	exit 1
fi

case "$1" in
    status)
        status
        ;;
	restart)
		stop
        sleep 2
        start
        ;;
	start)
        start
        ;;
	umstart)
        um_start
        ;;            
	stop)
		stop
        ;;    
	umstop)
        um_stop
        ;;            
    *)
        echo "Usage: $0 {start|stop|umstart|umstop|restart|status}"
        RETVAL=1
        ;;
esac

exit ${RETVAL}