Starting jar with shell general script under Linux (microservice)

vim app_jar.sh

#!/bin/bash

#source /etc/profile
# Auth: Liucx
# Please change these parameters according to your real env.
# set Java Home: Remember that dolphin only supports JDK8!
JAVA_HOME=/usr/java/jdk1.8.0_162

# application directory
cd `dirname $0`
APP_HOME=`pwd`

APP_NAME="`cd ${APP_HOME} && find -name '*.jar' `"
JAR_HOME=`pwd |awk -F"/" '{print $NF}'`
# Java JVM lunch parameters
if [ x"$JAVA_MEM_OPTS" == x ];then
    JAVA_MEM_OPTS="-server -Xms512m -Xmx512m -Xmn128m -Xss256k -XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:LargePageSizeInBytes=128m -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70 "
fi


# waiting timeout for starting, in seconds
START_WAIT_TIMEOUT=30

psid=0
 
checkpid() {
   javaps=`$JAVA_HOME/bin/jps -l | grep "$JAR_HOME"`
   if [ -n "$javaps" ]; then
      psid=`echo $javaps | awk '{print $1}'`
   else
      psid=0
   fi
}



start() {
   checkpid

   if [ $psid -ne 0 ]; then
      echo "================================"
      echo "warn: $APP_NAME already started! (pid=$psid)"
      echo "================================"
   else
      echo -n "Starting $APP_NAME ..."
      #-Dspring.profiles.active=dev Designated environment
      nohup $JAVA_HOME/bin/java -jar -Dspring.profiles.active=dev -DCONFIG_ENABLE=true $JAVA_MEM_OPTS  ${APP_NAME} >${JAR_HOME}.log 2>&1 &   
      checkpid
      if [ $psid -ne 0 ]; then
         echo "(pid=$psid) [OK]"
      else
         echo "[Failed]"
      fi
   fi
}

stop() {
    
   sleep 2
   checkpid

   if [ $psid -ne 0 ]; then
      echo -n "Stopping $APP_NAME ...(pid=$psid) "
      #kill -9 $psid
      kill -9 $psid
      if [ $? -eq 0 ]; then
         echo "[OK]"
      else
         echo "[Failed]"
      fi

#      checkpid
#      if [ $psid -ne 0 ]; then
#         stop
#      fi
   else
      echo "================================"
      echo "warn: $APP_NAME is not running"
      echo "================================"
   fi
}



status() {
   checkpid

   if [ $psid -ne 0 ];  then
      echo "$APP_NAME is running! (pid=$psid)"
   else
      echo "$APP_NAME is not running"
   fi
}


info() {
   echo "System Information:"
   echo "****************************"
   echo `head -n 1 /etc/issue`
   echo `uname -a`
   echo
   echo "JAVA_HOME=$JAVA_HOME"
   echo `$JAVA_HOME/bin/java -version`
   echo
   echo "APP_HOME=$APP_HOME"
   echo "APP_NAME=$APP_NAME"
   echo "****************************"
}

case "$1" in
   'start')
      start
      ;;
   'stop')
     stop
     ;;
   'restart')
     stop
     echo "You restart the application ..."
     start #
     ;;
   'status')
     status
     ;;
   'info')
     info
     ;;
  *)
     echo "Usage: $0 {start|stop|restart|status|info}"
     exit 1
esac

Usage:

app_jar.sh  start

app_jar.sh  stop

app_jar.sh  restart

Note: the script only needs to be placed in the current directory of the jar package. Only one jar package is allowed in the current directory of the script. If more than one jar package is started or restarted at the same time

Also need to remind: the starting jar package name body cannot be changed to prevent the script from being invalid. At present, it is in use in the company's production environment. I hope you can correct it and make suggestions.