spring boot jar start shell script

boot_jar_start.sh

```
#!/usr/bin/env bash

SCRIPTPATH=$( cd "$(dirname "$0")" ; pwd -P )
WORKING_DIR=$( cd "${SCRIPTPATH}/../" ; pwd -P )

VERSION="1.0"
JAR="MY-jar-"${VERSION}".jar"

# check server pid
function check_server_pid() {
        local pid_file="$WORKING_DIR/server.pid"
        if [[ -f "$pid_file" ]]; then
                if [[ -s "$pid_file" ]]; then
                        local pid=$(cat ${pid_file})
                        PID=$(ps -p ${pid} | tail -1 | grep -v grep | grep -v vi | grep -v PID | awk '{print $1}')
                fi
        else
                PID=$(ps -ef | grep ${JAR} | grep -v grep | grep -v vi | grep -v PID | awk '{print $2}')
        fi
}
check_server_pid

# check current user is root or not
if [[ "$(id -u)" = "0" ]]; then
        echo "It can not be executed by root." 1>&2
        exit 1
fi

# check override properties
function get_spring_config_location() {
        local properties_file=$WORKING_DIR/application.yaml
        if [[ -f "$properties_file" ]]
        then
                return "classpath:/application.yaml,$PROPERTIES_FILE"
        else
                return "classpath:/application.yaml"
        fi
}

if [[ -z $PID ]]; then
        nohup java -Xms512m -Xmx512m -jar ${WORKING_DIR}/${JAR} --spring_config_location=get_spring_config_location  1>> $WORKING_DIR/server.log 2>&1 &
        PID=$!
        echo $PID > $WORKING_DIR/server.pid
        echo "Success to start ${JAR}"
        echo "pid : "$PID
        echo "tail -f ${WORKING_DIR}/server.log"                
        exit 0
else
        echo "Already ${JAR} is running"
        exit 0
fi
```