Script for Automatic Restart of Tomcat Server

This script is for to restart the tomcat server by listening the port...In case the port closed the script automatically call the script and trigger mail to administrator..
---------------------------------------------------------------------------------------------------
#!/bin/bash
# description: Tomcat Start Stop Restart
# processname: tomcat

#Tomcat 8080
#The command to exit your program or service
progStart=exit
#Writes an entry to the log file indicating when the script last ran
echo "`date` Checking tomcat " > log_jasper.txt

#Check if program is running by using the ps command
#the -z option returns True if the length of its operand "STRING" is zero.
if [[ -z ` netstat -tulpn | grep 8080` ]]; then
#Optional - Send a mail that program is being restarted
sh /usr/local/apache-tomcat/bin/startup.sh

echo "`date` Jasperserver 8080 not detected" | mail -s "Jasperserver shuntdown Notification"  nataraj.r@gmail.com
$progStart
else
echo "Tomcat 8080 is running `date`"
fi