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#!/bin/bash
# chkconfig: 2345 20 80
# description: Tomcat 8 start/stop/status init.d script

JAVA_HOME=/usr/local/jdk
export JAVA_HOME

#Add Java binary files to PATH
PATH=$JAVA_HOME/bin:$PATH
export PATH

#CATALINA_HOME is the location of the bin files of Tomcat
CATALINA_HOME=/opt/tomcat
export CATALINA_HOME

#CATALINA_BASE is the location of the configuration files of this instance of Tomcat
CATALINA_BASE=$CATALINA_HOME/tomcat_1
export CATALINA_BASE


#CAALINA_PID is the Tomcat instance process ID.
CATALINA_PID="$CATALINA_BASE/temp/tomcat_1.pid"

export CATALINA_PID

#TOMCAT_USER is the default user of tomcat
TOMCAT_USER=tomcat
export TOMCAT_USER

#TOMCAT_USAGE is the message if this script is called without any options
TOMCAT_USAGE="Usage: $0 {\e[00;32mstart\e[00m|\e[00;31mstop\e[00m|\e[00;31mkill\e[00m|\e[00;32mstatus\e[00m|\e[00;31mrestart\e[00m}"

#SHUTDOWN_WAIT is wait time in seconds for java proccess to stop
SHUTDOWN_WAIT=20

tomcat_pid() {
        echo `ps -fe | grep $CATALINA_BASE | grep -v grep | tr -s " "|cut -d" " -f2`
}

#USER LEVEL CHECK
if [[ $EUID -ne 0 ]]; then
echo "`basename $0` requires root privileges." 1>&2
   exit 1
fi

start() {
  pid=$(tomcat_pid)
  if [ -n "$pid" ]
  then
    echo -e "\e[00;31mTomcat is already running (pid: $pid)\e[00m"
  else
    # Start tomcat
    echo -e "\e[00;32mStarting tomcat\e[00m"
        if [ `user_exists $TOMCAT_USER` = "1" ]
        then
                /bin/su - $TOMCAT_USER -s /bin/bash -c $CATALINA_BASE/bin/startup.sh
        else
                sh $CATALINA_BASE/bin/startup.sh
        fi
        status
  fi
  return 0
}

status(){
          pid=$(tomcat_pid)
          if [ -n "$pid" ]; then echo -e "\e[00;32mTomcat is running with pid: $pid\e[00m"
          else echo -e "\e[00;31mTomcat is not running\e[00m"
          fi
}

terminate() {
        echo -e "\e[00;31mTerminating Tomcat\e[00m"
        kill -9 $(tomcat_pid)
}

stop() {
  pid=$(tomcat_pid)
  if [ -n "$pid" ]
  then
    echo -e "\e[00;31mStoping Tomcat\e[00m"
          sh $CATALINA_BASE/bin/shutdown.sh

    let kwait=$SHUTDOWN_WAIT
    count=0;
    until [ `ps -p $pid | grep -c $pid` = '0' ] || [ $count -gt $kwait ]
    do
      echo -n -e "\n\e[00;31mwaiting for processes to exit\e[00m";
      sleep 1
      let count=$count+1;
    done

    if [ $count -gt $kwait ]; then
      echo -n -e "\n\e[00;31mkilling processes didn't stop after $SHUTDOWN_WAIT seconds\e[00m"
      terminate
    fi
  else
    echo -e "\e[00;31mTomcat is not running\e[00m"
  fi

  return 0
}

user_exists(){
        if id -u $1 >/dev/null 2>&1; then
        echo "1"
        else
                echo "0"
        fi
}

case $1 in
        start)
          start
        ;;
        stop)
          stop
        ;;
        restart)
          stop
          start
        ;;
        status)
                status
        ;;
        kill)
                terminate
        ;;
        *)
                echo -e $TOMCAT_USAGE
        ;;
esac
exit 0