#!/bin/bash
# Tomcat7 init script.
#
# chkconfig:  - 80 20
# description:  Start/stop script for Tomcat6

# Source function library.
. /etc/rc.d/init.d/functions

[ -f /etc/sysconfig/network ] && . /etc/sysconfig/network
[ "${NETWORKING}" = "no" ] && exit 0

prog="tomcat7"
[ -f /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog

TOMCATDEBUG=
TOMCATSECURITY=${SECURITY:+"-security"}
CATALINA_HOME=${CATALINA_HOME:="/usr/share/$prog"}
RUNAS_USER=${RUNAS_USER:="tomcat"}
WAITFOR=${WAITFOR:=3}
CATALINA_PID="/var/run/${prog}.pid"
RUN_SCRIPT="${CATALINA_HOME}/bin/catalina.sh"

CDIR=$(pwd)

JUNK=${JAVA_HOME:?"MUST BE CONFIGURED IN /etc/sysconfig/$prog"}
if [ ! -d $JAVA_HOME ]; then
  echo "$JAVA_HOME doesn't exist!"
  exit 1
fi

if [ ! -d $CATALINA_HOME ]; then
  echo CATALINA_HOME does not exist as a valid directory: $CATALINA_HOME
  exit 1
fi

export CATALINA_HOME CATALINA_PID JAVA_HOME JAVA_OPTS

cleanup() {
  rm -f ${CATALINA_PID}
}

echoFailure() {
  echo_failure
  echo
}

echoSuccess() {
  echo_success
  echo
}

start() {
  echo -n "Starting $prog..."
  STATUS=$(status >/dev/null)
  R=$?
  if [ $R -eq 0 ]; then
    echo -n "$prog is already running. exiting."
    echoFailure
    return 1
  fi

  touch ${CATALINA_PID}
  chown ${RUNAS_USER}:${RUNAS_USER} ${CATALINA_PID}
  cd ${CATALINA_HOME}
  runuser -s /bin/bash ${RUNAS_USER} -c "${RUN_SCRIPT} start >>${CATALINA_HOME}/logs/catalina.out 2>&1"
  RETVAL=$?
  cd ${CDIR}
  if [ $RETVAL -eq 0 ]; then
    echoSuccess
  else
    echoFailure
  fi
}

status() {
  RETVAL=1
  if [ -s ${CATALINA_PID} ]; then
    read kpid < ${CATALINA_PID}
    if checkpid $kpid 2>&1; then
      echo "$prog is running ($kpid)"
      RETVAL=0
    else
      echo "The lock file was found but no process running for pid $kpid."
    fi
  else
    CHECKPROC="Dcatalina.home=${CATALINA_HOME}.*org.apache.catalina.startup.Bootstrap"
    pid="$(pgrep -u ${RUNAS_USER} -f ${CHECKPROC})"
      if [ -n "$pid" ]; then
        echo "$prog is running ($pid) but no PID file exists (or it's empty)."
        RETVAL="0"
      else
        echo "$prog is stopped."
      fi
    fi
    return $RETVAL
}

stop() {
  echo -n "Stopping $prog."

  if status >/dev/null; then
    runuser -s /bin/bash ${RUNAS_USER} -c "${RUN_SCRIPT} stop >>${CATALINA_HOME}/logs/catalina.out 2>&1"

    COUNT=0
    while [ $COUNT -lt ${WAITFOR} ]; do
      if status >/dev/null; then
        echo -n "."
        sleep 1
      else
        echoSuccess
        cleanup
        return
      fi
      COUNT=$(expr  $COUNT + 1)
    done

    echo
    echo -n "$prog didn't stop, killing it softly.."
    CHECKPROC="Dcatalina.home=${CATALINA_HOME}.*org.apache.catalina.startup.Bootstrap"
    pid="$(pgrep -u ${RUNAS_USER} -f ${CHECKPROC})"
    kill $pid
    sleep 4
    if status >/dev/null; then
      echo
      echo "Shutdown is taking too long, force stopping $prog."
      kill -9 $pid
      if status >/dev/null; then
        echoFailure
      else
        echoSuccess
        cleanup
        return
      fi
    else
      echoSuccess
      cleanup
      return
    fi
  else
    echo
    echo -n "$prog is not running. Exiting."
    echoFailure
  fi
}

case "$1" in
  start)  start;;
  stop)   stop;;
  status) status;;
  restart) stop ; start;;
  *) echo "Usage: $0 [ start | stop | status | restart ]";;
esac