reusable app control shell scripts - start/stop app

common-ctl.sh

#!/bin/bash

function getWorkDir
{
   dir=$(dirname $0)
   cd $dir || {
		echo "$dir not eixt."
		exit 1
   }

  cd ..
}

function getLogDir
{
    LOG_DIR=logs/
    [ -d $LOG_DIR ] || mkdir -p $LOG_DIR
}


function prepareJVMOption
{
    HEAP_SIZE="$((4*1024))m"
    ENDEN_SIZE="$((2*1024))m"
    PERM_SIZE="$((320))m"
    
    JAVA_OPT="$JAVA_OPT -server -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCApplicationStoppedTime -XX:+PrintGCApplicationConcurrentTime"
    JAVA_OPT="$JAVA_OPT -verbose:gc -Xloggc:$LOG_DIR/gc.log -XX:-UseGCLogFileRotation -XX:+DisableExplicitGC" #-XX:PrintHeapAtGC
    JAVA_OPT="$JAVA_OPT -Xnoclassgc -Xms$HEAP_SIZE -Xmx$HEAP_SIZE -Xmn$ENDEN_SIZE"
    JAVA_OPT="$JAVA_OPT -XX:+UseConcMarkSweepGC -XX:+UseCMSCompactAtFullCollection -XX:CMSInitiatingOccupancyFraction=70 -XX:+CMSParallelRemarkEnabled -XX:SoftRefLRUPolicyMSPerMB=0 -XX:+CMSClassUnloadingEnabled -XX:SurvivorRatio=8"
    JAVA_OPT="$JAVA_OPT -XX:PermSize=$PERM_SIZE -XX:MaxPermSize=$PERM_SIZE"
    JAVA_OPT="$JAVA_OPT -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=$LOG_DIR/oom.hprof -XX:ErrorFile=$LOG_DIR/hs_error%p.log"
    JAVA_OPT="$JAVA_OPT -XX:+UseBiasedLocking -XX:+UseCompressedOops"
}

function enableJmxRemote 
{
    local port=${1:-9999}
    JAVA_OPT="$JAVA_OPT -Dcom.sun.management.jmxremote.port=$port" 
    JAVA_OPT="$JAVA_OPT -Dcom.sun.management.jmxremote.authenticate=false"
    JAVA_OPT="$JAVA_OPT -Dcom.sun.management.jmxremote.ssl=false"
}

function enableDebug 
{
    local port=${1:-8000}
    JAVA_OPT="$JAVA_OPT -agentlib:jdwp=transport=dt_socket,address=*:$port"
}

function usage 
{
   echo "$0 start|stop"
   exit 1
}

function getJava 
{
   if [ -n "$JAVA_BIN" ]
   then
      return
   fi
   if [ -n "$JAVA_HOME" ]
   then
      JAVA_BIN=$JAVA_HOME/bin/java
      return
   fi
   JAVA_BIN=java
}

function doStart
{

  if [ -f $PID_FILE ] && [ -s $PID_FILE ]
  then
       echo "already started PID = $(cat $PID_FILE)"
       exit 0
  fi

  getJava

  if [ "x$1" = "xdebug" ]
  then
      shift
      enableDebug "$@"
  elif [ "x$1" = "xjmxremote" ]
  then
      shift
      enableJmxRemote "$@"
  fi
  nohup $JAVA_BIN $JAVA_OPT -DAPP_HOME=. -jar $JAR_FILE 1>$LOG_DIR/stdout.log 2>$LOG_DIR/stderr.log &
  RT=$? PID=$! 
  if [ $RT -eq 0 -a -n "$!" ]
  then
	  echo "$PID" > $PID_FILE
          sleep 1
	  if ! [ -d  /proc/$PID ] 
          then
               echo "Start failure !, see log for more detail."
               rm -f $PID_FILE
               return
          fi 
          echo "Start succeed, PID = $PID"
  fi
}

function stopByPid
{
  local PID=$1
  echo "Stop with PID = $PID"
  for i in `seq 5`
  do
      echo -e -n "try to stop by kill SIGTERM .. $i\r"
      tryStop $PID
  done    

  echo "Stop failured after retry 5 times "
}

function tryStop
{
   local PID=$1
   if ! [ -d /proc/$PID ] 
   then
          [ -e $PID_FILE ] && rm -f $PID_FILE
          echo -e "\nStopped!"
          exit 0
   fi
   kill $PID
   sleep 5
   if ! [ -d /proc/$PID ] 
   then
          [ -e $PID_FILE ] && rm -f $PID_FILE
          echo -e "\nStopped!"
          exit 0
   fi
}

function doStop
{
  if [ -f $PID_FILE ] && [ -s $PID_FILE ]
  then
      PID=$(cat $PID_FILE) 
  else
      PID=$(ps ax | grep java  | grep -v grep | grep $JAR_FILE | awk '{print $1}' | head -1) 
  fi
  if [ -z $PID ]
  then
      echo "already stopped !"
      exit 0
  fi
  stopByPid $PID
}

function init
{
    PID_FILE="bin/run.pid"
    JAR_FILE="lib/db-mq-1.0-SNAPSHOT.jar"
    getWorkDir
    getLogDir
    prepareJVMOption
}



[ $# -ge 1 ] || usage

init

if [ $1 = "start" ]
then
   shift
   doStart "$@"
   exit
fi

if [ $1 = "stop" ]
then
   doStop
   exit
fi

usage

#### END ###