#!/bin/bash  
#
# Startup script for jetty under *nix systems (it works under NT/cygwin too).

# To get the service to restart correctly on reboot, uncomment below (3 lines):
# ========================
# chkconfig: 3 99 99
# description: Jetty 7 webserver
# processname: jetty
# ========================

# Configuration files
#
# /etc/default/jetty
#   If it exists, this is read at the start of script. It may perform any 
#   sequence of shell commands, like setting relevant environment variables.
#
# $HOME/.jettyrc
#   If it exists, this is read at the start of script. It may perform any 
#   sequence of shell commands, like setting relevant environment variables.
#
# /etc/jetty.conf
#   If found, and no configurations were given on the command line,
#   the file will be used as this script's configuration. 
#   Each line in the file may contain:
#     - A comment denoted by the pound (#) sign as first non-blank character.
#     - The path to a regular file, which will be passed to jetty as a 
#       config.xml file.
#     - The path to a directory. Each *.xml file in the directory will be
#       passed to jetty as a config.xml file.
#
#   The files will be checked for existence before being passed to jetty.
#
# $JETTY_HOME/etc/jetty.xml
#   If found, used as this script's configuration file, but only if
#   /etc/jetty.conf was not present. See above.
#   
# Configuration variables
#
# JAVA_HOME  
#   Home of Java installation. 
#
# JAVA
#   Command to invoke Java. If not set, $JAVA_HOME/bin/java will be
#   used.
#
# JAVA_OPTIONS
#   Extra options to pass to the JVM
#
# JETTY_HOME
#   Where Jetty is installed. If not set, the script will try go
#   guess it by first looking at the invocation path for the script,
#   and then by looking in standard locations as $HOME/opt/jetty
#   and /opt/jetty. The java system property "jetty.home" will be
#   set to this value for use by configure.xml files, f.e.:
#
#    <Arg><SystemProperty name="jetty.home" default="."/>/webapps/jetty.war</Arg>
#
# JETTY_PORT
#   Override the default port for Jetty servers. If not set then the
#   default value in the xml configuration file will be used. The java
#   system property "jetty.port" will be set to this value for use in
#   configure.xml files. For example, the following idiom is widely
#   used in the demo config files to respect this property in Listener
#   configuration elements:
#
#    <Set name="Port"><SystemProperty name="jetty.port" default="8080"/></Set>
#
#   Note: that the config file could ignore this property simply by saying:
#
#    <Set name="Port">8080</Set>
#
# JETTY_RUN
#   Where the jetty.pid file should be stored. It defaults to the
#   first available of /var/run, /usr/var/run, and /tmp if not set.
#  
# JETTY_PID
#   The Jetty PID file, defaults to $JETTY_RUN/jetty.pid
#   
# JETTY_ARGS
#   The default arguments to pass to jetty.
#
# JETTY_USER
#   if set, then used as a username to run the server as
#

usage()
{
    echo "Usage: $0 {start|stop|run|restart|check|supervise} [ CONFIGS ... ] "
    exit 1
}

[ $# -gt 0 ] || usage


##################################################
# Some utility functions
##################################################
findDirectory()
{
    OP=$1
    shift
    for L in $* ; do
        [ $OP $L ] || continue 
        echo $L
        break
    done 
}

running()
{
    [ -f $1 ] || return 1
    PID=$(cat $1)
    ps -p $PID >/dev/null 2>/dev/null || return 1
    return 0
}

##################################################
# Get the action & configs
##################################################

ACTION=$1
shift
ARGS="$*"
NO_START=0

##################################################
# See if there's a default configuration file
##################################################
if [ -f /etc/default/jetty7 ] ; then 
  . /etc/default/jetty7
elif [ -f /etc/default/jetty ] ; then 
  . /etc/default/jetty
fi


##################################################
# See if there's a user-specific configuration file
##################################################
if [ -f $HOME/.jettyrc ] ; then 
  . $HOME/.jettyrc
fi

##################################################
# Set tmp if not already set.
##################################################

if [ -z "$TMP" ] 
then
  TMP=/tmp
fi

##################################################
# Jetty's hallmark
##################################################
JETTY_INSTALL_TRACE_FILE="etc/jetty.xml"
TMPJ=$TMP/j$$


##################################################
# Try to determine JETTY_HOME if not set
##################################################
if [ -z "$JETTY_HOME" ] 
then
  JETTY_HOME_1=`dirname "$0"`
  JETTY_HOME_1=`dirname "$JETTY_HOME_1"`
  if [ -f "${JETTY_HOME_1}/${JETTY_INSTALL_TRACE_FILE}" ] ; 
  then 
     JETTY_HOME=${JETTY_HOME_1} 
  fi
fi


##################################################
# if no JETTY_HOME, search likely locations.
##################################################
if [ "$JETTY_HOME" = "" ] ; then
  STANDARD_LOCATIONS="           \
        /usr/share               \
        /usr/share/java          \
        $HOME                    \
        $HOME/src                \
        ${HOME}/opt/             \
        /opt                     \
        /java                    \
        /usr/local               \
        /usr/local/share         \
        /usr/local/share/java    \
        /home                    \
        "
  JETTY_DIR_NAMES="              \
        jetty-7                  \
        jetty7                   \
        jetty-7.*                \
        jetty                    \
        Jetty-7                  \
        Jetty7                   \
        Jetty-7.*                \
        Jetty                    \
        "
        
  JETTY_HOME=
  for L in $STANDARD_LOCATIONS 
  do
     for N in $JETTY_DIR_NAMES 
     do
         if [ -d $L/$N ] && [ -f "$L/${N}/${JETTY_INSTALL_TRACE_FILE}" ] ; 
         then 
            JETTY_HOME="$L/$N"
         fi
     done
     [ ! -z "$JETTY_HOME" ] && break
  done
fi


##################################################
# No JETTY_HOME yet? We're out of luck!
##################################################
if [ -z "$JETTY_HOME" ] ; then
    echo "** ERROR: JETTY_HOME not set, you need to set it or install in a standard location" 
    exit 1
fi

cd $JETTY_HOME
JETTY_HOME=`pwd`

#####################################################
# Check that jetty is where we think it is
#####################################################
if [ ! -r $JETTY_HOME/$JETTY_INSTALL_TRACE_FILE ] 
then
   echo "** ERROR: Oops! Jetty doesn't appear to be installed in $JETTY_HOME"
   echo "** ERROR:  $JETTY_HOME/$JETTY_INSTALL_TRACE_FILE is not readable!"
   exit 1
fi

##################################################
# Try to find this script's configuration file,
# but only if no configurations were given on the
# command line.
##################################################
if [ -z "$JETTY_CONF" ] 
then
  if [ -f /etc/jetty.conf ]
  then
     JETTY_CONF=/etc/jetty.conf
  elif [ -f "${JETTY_HOME}/etc/jetty.conf" ]
  then
     JETTY_CONF="${JETTY_HOME}/etc/jetty.conf"
  fi
fi

##################################################
# Read the configuration file if one exists
##################################################
CONFIG_LINES=
if [ -f "$JETTY_CONF" ] && [ -r "$JETTY_CONF" ] 
then
  CONFIG_LINES=`cat $JETTY_CONF | grep -v "^[:space:]*#" | tr "\n" " "` 
fi

#####################################################
# Find a location for the pid file
#####################################################
if [  -z "$JETTY_RUN" ] 
then
  JETTY_RUN=`findDirectory -w /var/run /usr/var/run /tmp`
fi

#####################################################
# Find a PID for the pid file
#####################################################
if [  -z "$JETTY_PID" ] 
then
  JETTY_PID="$JETTY_RUN/jetty.pid"
fi


##################################################
# Check for JAVA_HOME
##################################################
if [ -z "$JAVA_HOME" ]
then
    # If a java runtime is not defined, search the following
    # directories for a JVM and sort by version. Use the highest
    # version number.

    # Java search path
    JAVA_LOCATIONS="\
        /usr/java \
        /usr/bin \
        /usr/local/bin \
        /usr/local/java \
        /usr/local/jdk \
        /usr/local/jre \
        /usr/lib/jvm \
        /opt/java \
        /opt/jdk \
        /opt/jre \
    " 
    JAVA_NAMES="java jdk jre"
    for N in $JAVA_NAMES ; do
        for L in $JAVA_LOCATIONS ; do
            [ -d $L ] || continue 
            find $L -name "$N" ! -type d | grep -v threads | while read J ; do
                [ -x $J ] || continue
                VERSION=`eval $J -version 2>&1`       
                [ $? = 0 ] || continue
                VERSION=`expr "$VERSION" : '.*"\(1.[0-9\.]*\)["_]'`
                [ "$VERSION" = "" ] && continue
                expr $VERSION \< 1.2 >/dev/null && continue
                echo $VERSION:$J
            done
        done
    done | sort | tail -1 > $TMPJ
    JAVA=`cat $TMPJ | cut -d: -f2`
    JVERSION=`cat $TMPJ | cut -d: -f1`

    JAVA_HOME=`dirname $JAVA`
    while [ ! -z "$JAVA_HOME" -a "$JAVA_HOME" != "/" -a ! -f "$JAVA_HOME/lib/tools.jar" ] ; do
        JAVA_HOME=`dirname $JAVA_HOME`
    done
    [ "$JAVA_HOME" = "" ] && JAVA_HOME=

    echo "Found JAVA=$JAVA in JAVA_HOME=$JAVA_HOME"
fi


##################################################
# Determine which JVM of version >1.2
# Try to use JAVA_HOME
##################################################
if [ "$JAVA" = "" -a "$JAVA_HOME" != "" ]
then
  if [ ! -z "$JAVACMD" ] 
  then
     JAVA="$JAVACMD" 
  else
    [ -x $JAVA_HOME/bin/jre -a ! -d $JAVA_HOME/bin/jre ] && JAVA=$JAVA_HOME/bin/jre
    [ -x $JAVA_HOME/bin/java -a ! -d $JAVA_HOME/bin/java ] && JAVA=$JAVA_HOME/bin/java
  fi
fi

if [ "$JAVA" = "" ]
then
    echo "Cannot find a JRE or JDK. Please set JAVA_HOME to a >=1.2 JRE" 2>&2
    exit 1
fi

JAVA_VERSION=`expr "$($JAVA -version 2>&1 | head -1)" : '.*1\.\([0-9]\)'`

#####################################################
# See if JETTY_PORT is defined
#####################################################
if [ "$JETTY_PORT" != "" ] 
then
  JAVA_OPTIONS="$JAVA_OPTIONS -Djetty.port=$JETTY_PORT"
fi

#####################################################
# See if JETTY_LOGS is defined
#####################################################
if [ "$JETTY_LOGS" != "" ]
then
  JAVA_OPTIONS="$JAVA_OPTIONS -Djetty.logs=$JETTY_LOGS"
fi

#####################################################
# Are we running on Windows? Could be, with Cygwin/NT.
#####################################################
case "`uname`" in
CYGWIN*) PATH_SEPARATOR=";";;
*) PATH_SEPARATOR=":";;
esac


#####################################################
# Add jetty properties to Java VM options.
#####################################################
JAVA_OPTIONS="$JAVA_OPTIONS -Djetty.home=$JETTY_HOME -Djava.io.tmpdir=$TMP"

[ -f $JETTY_HOME/etc/start.config ] && JAVA_OPTIONS="-DSTART=$JETTY_HOME/etc/start.config $JAVA_OPTIONS"

#####################################################
# This is how the Jetty server will be started
#####################################################

JETTY_START=$JETTY_HOME/start.jar
[ ! -f $JETTY_START ] && JETTY_START=$JETTY_HOME/lib/start.jar

case "`uname`" in
CYGWIN*)
JETTY_START="`cygpath -w $JETTY_START`"
echo $JETTY_START
;;
esac

RUN_ARGS="$JAVA_OPTIONS -jar $JETTY_START --fromDaemon $JETTY_ARGS $ARGS"
RUN_CMD="$JAVA $RUN_ARGS"

#####################################################
# Comment these out after you're happy with what 
# the script is doing.
#####################################################
#echo "JETTY_HOME     =  $JETTY_HOME"
#echo "JETTY_CONF     =  $JETTY_CONF"
#echo "JETTY_RUN      =  $JETTY_RUN"
#echo "JETTY_PID      =  $JETTY_PID"
#echo "JETTY_ARGS     =  $JETTY_ARGS"
#echo "ARGS           =  $ARGS"
#echo "JAVA_OPTIONS   =  $JAVA_OPTIONS"
#echo "JAVA           =  $JAVA"


##################################################
# Do the action
##################################################
case "$ACTION" in
  start)
        echo -n "Starting Jetty: "

        if [ "$NO_START" = "1" ]; then 
	  echo "Not starting jetty - NO_START=1 in /etc/default/jetty7";
          exit 0;
	fi


	if [ "$START_STOP_DAEMON" = "1" ] && type start-stop-daemon > /dev/null 2>&1
	then
          [ x$JETTY_USER = x ] && JETTY_USER=$(whoami)
	  [ $UID = 0 ] && CH_USER="-c $JETTY_USER"
	  if start-stop-daemon -S -p$JETTY_PID $CH_USER -d $JETTY_HOME -b -m -a $JAVA -- $RUN_ARGS 
	  then
	      sleep 1
	      if running $JETTY_PID
	      then
                  echo OK
              else
                  echo FAILED
              fi
	  fi

	else

          if [ -f $JETTY_PID ]
          then
            if running $JETTY_PID
            then
              echo "Already Running!!"
              exit 1
            else
              # dead pid file - remove
              rm -f $JETTY_PID
            fi
          fi

          if [ x$JETTY_USER != x ] 
          then
              touch $JETTY_PID
              chown $JETTY_USER $JETTY_PID
              su - $JETTY_USER -c "
                $RUN_CMD &
                PID=\$!
                disown \$PID
                echo \$PID > $JETTY_PID"
          else
              $RUN_CMD &
              PID=$!
              disown $PID
              echo $PID > $JETTY_PID
          fi

          echo "STARTED Jetty `date`" 
        fi

        ;;

  stop)
        echo -n "Stopping Jetty: "
	if [ "$START_STOP_DAEMON" = "1" ] && type start-stop-daemon > /dev/null 2>&1; then
	  start-stop-daemon -K -p $JETTY_PID -d $JETTY_HOME -a $JAVA -s HUP 
	  sleep 1
	  if running $JETTY_PID
	  then
	      sleep 3
	      if running $JETTY_PID
	      then
		  sleep 30
	          if running $JETTY_PID
	          then
	             start-stop-daemon -K -p $JETTY_PID -d $JETTY_HOME -a $JAVA -s KILL
		  fi
              fi
	  fi

	  rm -f $JETTY_PID
          echo OK
	else
	  PID=`cat $JETTY_PID 2>/dev/null`
          TIMEOUT=30
          while running $JETTY_PID && [ $TIMEOUT -gt 0 ]
          do
            kill $PID 2>/dev/null
            sleep 1
            let TIMEOUT=$TIMEOUT-1
          done
          
          [ $TIMEOUT -gt 0 ] || kill -9 $PID 2>/dev/null

	  rm -f $JETTY_PID
          echo OK
	fi
        ;;

  restart)
        JETTY_SH=$0
        if [ ! -f $JETTY_SH ]; then
          if [ ! -f $JETTY_HOME/bin/jetty.sh ]; then
            echo "$JETTY_HOME/bin/jetty.sh does not exist."
            exit 1
          fi
          JETTY_SH=$JETTY_HOME/bin/jetty.sh
        fi
        $JETTY_SH stop $*
        sleep 5
        $JETTY_SH start $*
        ;;

  supervise)
       #
       # Under control of daemontools supervise monitor which
       # handles restarts and shutdowns via the svc program.
       #
         exec $RUN_CMD
         ;;

  run|demo)
        echo "Running Jetty: "

        if [ -f $JETTY_PID ]
        then
            if running $JETTY_PID
            then
              echo "Already Running!!"
              exit 1
            else
              # dead pid file - remove
              rm -f $JETTY_PID
            fi
        fi

        exec $RUN_CMD
        ;;

  check)
        echo "Checking arguments to Jetty: "
        echo "JETTY_HOME     =  $JETTY_HOME"
        echo "JETTY_CONF     =  $JETTY_CONF"
        echo "JETTY_RUN      =  $JETTY_RUN"
        echo "JETTY_PID      =  $JETTY_PID"
        echo "JETTY_PORT     =  $JETTY_PORT"
        echo "JETTY_LOGS     =  $JETTY_LOGS"
        echo "JAVA_OPTIONS   =  $JAVA_OPTIONS"
        echo "JAVA           =  $JAVA"
        echo "CLASSPATH      =  $CLASSPATH"
        echo "RUN_CMD        =  $RUN_CMD"
        echo
        
        if [ -f $JETTY_RUN/jetty.pid ]
        then
            echo "Jetty running pid="`cat $JETTY_RUN/jetty.pid`
            exit 0
        fi
        exit 1
        ;;

*)
        usage
	;;
esac

exit 0



