Bash script for start/stop/status/run operations on a server implemented in java.

server.sh

#!/usr/bin/env bash

################################################################################

WEBROOT=/home/admin/www/ezpzjapanez.com
CERT=/home/admin/certs/certificates/ezpzjapanez.com.p12

################################################################################

# Directory containing this script
DIR=$(dirname $(readlink /proc/$$/fd/255))

# Canonical Java path
JAVA_HOME=${JAVA_HOME:-}
if [[ -z "${JAVA_HOME}" ]]; then _JAVA=java; else _JAVA="${JAVA_HOME}/bin/java"; fi
JAVA="$(readlink -e "$(type -P ${_JAVA})")"
JAVA="${JAVA:-${_JAVA}}"

DEBUG=""
ARG=""
if [ "$1" == "--debug" ]; then
  DEBUG="true"
  ARG="$2"
else
  if [ "$2" == "--debug" ]; then
    DEBUG="true"
    ARG="$1"
  else
    ARG="$1"
  fi
fi

# JVM arg for remote debugging
if [[ "${DEBUG}" == "true" ]]; then
  JDWP="-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=5005"
else
  JDWP=
fi

# Jar
for JAR in ${DIR}/build/libs/*.jar; do break; done

# BootClasspath Jar
for BOOT in ${DIR}/build/boot/*.jar; do break; done

if [[ -n "${BOOT}" ]]; then
  CMD="${JAVA} -Xbootclasspath/p:${BOOT} ${JDWP} -jar ${JAR} ${WEBROOT} ${CERT}"
  CMD_ALT="${JAVA} -Xbootclasspath/p:${BOOT} -jar ${JAR} ${WEBROOT} ${CERT}"
else
  CMD="${JAVA} ${JDWP} -jar ${JAR} ${WEBROOT} ${CERT}"
  CMD_ALT="${JAVA} -jar ${JAR} ${WEBROOT} ${CERT}"
fi

# Find process
function findProcess() {
  PID=
    for PROC in /proc/*/; do
      # Java process
      EXE="$(type -P ${PROC}exe)"
      EXE="${EXE:-${PROC}exe}"
      EXE="$(readlink -e "${EXE}")"
      if [[ "${EXE}" == "${JAVA}" ]]; then
        # Started from this directory
        CMD_LINE="$(cat "${PROC}cmdline" | tr "\0" " ")"
        if [[ "${CMD} " == "${CMD_LINE}" || "${CMD_ALT} " == "${CMD_LINE}" ]]; then
          PROC=${PROC#/*/}
          PID=${PROC%/}
          break
        fi
      fi
    done
}
findProcess

function start() {
  if [[ -n  "${PID}" ]]; then
    echo "Server is already running" >&2
    false
  else
    echo -n "Starting server..." >&2
    cat "${DIR}"/server.log >> "${DIR}"/server.old.log
    ${CMD} > "${DIR}/server.log" 2>&1 &
    echo "Done" >&2
    true
  fi
}

function run() {
  if [[ -n  "${PID}" ]]; then
    tail --follow --lines=0 --pid=${PID} ${DIR}/server.log
  else
    cat ${DIR}/server.log >> ${DIR}/server.old.log
    ${CMD} | tee "${DIR}/server.log" 2>&1
  fi
}

function stop() {
  if [[ -n "${PID}" ]]; then
    echo -n "Stopping server..." >&2
    $(kill -9 ${PID} 2>/dev/null) && (echo "Done" && true) || (echo "Failed" && false)
  else
    echo "Server is not running" >&2
    true
  fi
}

function restart() {
  stop && (findProcess; start)
}

function status() {
  if [[ -n "${PID}" ]]; then
    echo "Server is running" >&2
    true
  else
    echo "Server is not running" >&2
    false
  fi
}

case "${ARG}" in
  start)
    start
    ;;
  stop)
    stop
    ;;
  restart)
    restart
    ;;
  status)
    status
    ;;
  run)
    run
    ;;
  *)
    echo "Usage: $0 {start|stop|status|run} [--debug]"
esac