Tomcat Monitoring

#!/bin/bash
#--------------------------------------------------------
# Script contacts a HTTP-Server and executes
# a command if server seems to be down.
#--------------------------------------------------------

#
# Definitions on checked target
#
SERVER=localhost
PORT=8080
URL=/index.jsp
CONTENT="HTTP/1.1 200 OK"
START_CMD=/usr/java/tomcat/bin/startup.sh
RESTART_LOG=/var/log/tomcat/tomcat-restart.log
RESTART_MAILADR=calvin@hobbes.com

#
# Contact server and save server's answer
#
ANSWER=`wget --server-response --output-document=- http://$SERVER:$PORT/$URL 2>&1`
#
# Parse answer for content 
#
RUNNING=`echo $ANSWER | grep "$CONTENT" | wc -l`
#
# React according to running flag
#
if [ $RUNNING == 1 ]
then
  echo "Server $SERVER:$PORT is running, ok."
else
  DATE_STR=`date`
  ERR_MSG="$DATE_STR $SERVER:$PORT is NOT running, execute start command..."
  # Write notification to log if log file defined
  if [[ -n "$RESTART_LOG" ]]
  then
    echo $ERR_MSG >> $RESTART_LOG
  fi
  # Notify admin via mail if mail address defined
  if [[ -n "$RESTART_MAILADR" ]]
  then
    echo "The server will be restarted. Maybe you want to check http://$SERVER:$PORT$URL" | mail -s "$ERR_MSG" $RESTART_MAILADR
  fi
  exec $START_CMD
fi