#!/bin/sh

JVM=java
. /etc/osgiboot/osgi-service-settings.sh

APP=$1

CONF_DIR=/etc/$APP
if [ -f $CONF_DIR/settings.sh ];then
	. $CONF_DIR/settings.sh
fi

LIB_DIR=/usr/share/$APP/lib

# read/write
EXEC_DIR=/var/lib/$APP
DATA_DIR=$EXEC_DIR/data
CONF_RW=$EXEC_DIR/conf

LOG_DIR=/var/log/$APP
LOG_FILE=$LOG_DIR/$APP.log

RUN_DIR=/var/run/$APP
PID_FILE=$RUN_DIR/$APP.pid
SHUTDOWN_FILE=$RUN_DIR/$APP.shutdown

OSGI_INSTALL_AREA=/usr/share/osgi/boot
OSGI_FRAMEWORK=$OSGI_INSTALL_AREA/org.eclipse.osgi.jar

RETVAL=0

start() {
	if [ -f $PID_FILE ];then
		PID=`cat $PID_FILE`
		kill -0 $PID &> /dev/null
		PID_EXISTS=$?
		if [ $PID_EXISTS -eq 0 ]; then
			echo $APP already running with pid $PID
			RETVAL=1
			return $RETVAL
		else
			echo Old $APP process with pid $PID is dead, removing $PID_FILE
			rm -f $PID_FILE
		fi
	fi

	if [ ! -f $CONF_RW/config.ini ]; then
		#echo osgi.configuration.cascaded=true > $CONF_RW/config.ini
		#echo osgi.sharedConfiguration.area=$CONF_DIR >> $CONF_RW/config.ini
		#echo osgi.sharedConfiguration.area.readOnly=true >> $CONF_RW/config.ini
		cp --preserve $CONF_DIR/config.ini $CONF_RW/config.ini
	fi
	touch $SHUTDOWN_FILE
	cd $EXEC_DIR
	$JVM \
		-Dargeo.osgi.shutdownFile="$SHUTDOWN_FILE" \
		-Dlog4j.configuration="file:$CONF_DIR/log4j.properties" \
		-Djava.security.manager= \
		-Djava.security.policy="file:/etc/osgiboot/all.policy" \
		$JAVA_OPTS -jar $OSGI_FRAMEWORK \
		-clean \
		-configuration "$CONF_RW" \
		-data "$DATA_DIR" \
		>> $LOG_FILE 2>&1 &
	# (above) stderr redirected to stdout, then stdout to log file
	# see http://tldp.org/LDP/abs/html/io-redirection.html
	PID=$!
	echo $PID > $PID_FILE
	#echo Started $APP with pid $PID
	return $RETVAL
}

stop() {
	if [ -f $PID_FILE ];then
		PID=`cat $PID_FILE`
		kill -0 $PID &> /dev/null
		PID_EXISTS=$?
		if [ $PID_EXISTS -ne 0 ]; then
			echo Dead $APP process with pid $PID, removing $PID_FILE
			rm -f $PID_FILE
			RETVAL=1
			return $RETVAL
		fi
	else
		echo $APP is not running
		RETVAL=1
		return $RETVAL
	fi
	
	# notifies application by removing the shutdown file
	rm -f $SHUTDOWN_FILE
	
	# wait 5 min for application to shutdown, then kill it
	TIMEOUT=$((5*60))
	BEGIN=$(date +%s)
	while kill -0 $PID &> /dev/null
	do
		sleep 1
		NOW=$(date +%s)
		DURATION=$(($NOW-$BEGIN))
		if [ $DURATION -gt $TIMEOUT ]; then
			kill -9 $PID
			echo Forcibly killed $APP with pid $PID
			RETVAL=1
		fi
	done
	
	# remove pid file
	rm -f $PID_FILE
	return $RETVAL

# timeout is only available in EL6
#	timeout 5m sh << EOF
#while kill -0 $PID &> /dev/null; do sleep 1; done
#EOF
#	TIMEOUT_EXIT=$?
#	if [ $TIMEOUT_EXIT -eq 124 ];then
#		kill -9 $PID
#		RETVAL=1
#		echo Killed $APP with pid $PID
#	else
#		echo Stopped $APP with pid $PID
#	fi
#	rm -f $PID_FILE
#	return $RETVAL
}

status() {
	if [ -f $PID_FILE ];then
		PID=`cat $PID_FILE`
	else
		echo $APP is not running
		return $RETVAL
	fi
	kill -0 $PID &> /dev/null
	PID_EXISTS=$?
	if [ $PID_EXISTS -eq 0 ]; then
		echo $APP is running with pid $PID ...
	else
		echo No $APP process with pid $PID, removing $PID_FILE
		rm -f $PID_FILE
	fi
	return $RETVAL
}

# main
case "$2" in
  start)
        start
        ;;
  stop)
        stop
        ;;
  status)
	status
        ;;
  *)
        echo $"Usage: $0 {start|stop|status}"
        exit 1
esac