Centos8 java application as service

Question

Background:

We are running java springboot applications on Centos8 (for now...) as service but applications take some time to startup: flyway, DAO initialization... Actualy start of service can take about 7 minuts

SystemD service

[Unit]
Description=SSO
After=syslog.target network.target

[Service]
Type=forking
User=my_app
Group=my_app

SuccessExitStatus=143

ExecStart=/bin/bash -c "exec /home/my_app/sso/run.sh start >&1"
ExecStop=/bin/bash -c "exec /home/my_app/sso/run.sh stop >&1"
ExecReload=/bin/bash -c "exec /home/my_app/sso/run.sh restart >&1"

[Install]
WantedBy=multi-user.target

Application start script

#!/bin/bash
BASE_DIR=/home/my_app/sso/
LOG_PATH=$BASE_DIR/logs/
PID_FILE=$BASE_DIR/app.pid

JAVA_OPTS="$JAVA_OPTS -Djava.awt.headless=true"
... and tons of another JAVA_OPTS ...

START_COMMAND="java $JAVA_OPTS -jar $BASE_DIR/deploy/sso.jar"

start() {
  PID=`$START_COMMAND >> $LOG_PATH/sso-${HOSTNAME}.log & echo $!`
}

case "$1" in
start)
    if [ -f $PID_FILE ]; then
        PID=`cat $PID_FILE`
        if [ -z "`ps axf | grep ${PID} | grep -v grep`" ]; then
            start
        else
            echo "Already running [$PID]"
            exit 0
        fi
    else
        start
    fi

    if [ -z $PID ]; then
        echo "Failed starting"
        exit 1
    else
        echo $PID > $PID_FILE
        echo "Started [$PID]"
        exit 0
    fi
;;

status)
    if [ -f $PID_FILE ]; then
        PID=`cat $PID_FILE`
        if [ -z "`ps axf | grep ${PID} | grep -v grep`" ]; then
            echo "Not running (process dead but PID file exists)"
            exit 1
        else
            echo "Running [$PID]"
            exit 0
        fi
    else
        echo "Not running"
        exit 0
    fi
;;
stop)
    if [ -f $PID_FILE ]; then
        PID=`cat $PID_FILE`
        if [ -z "`ps axf | grep ${PID} | grep -v grep`" ]; then
            echo "Not running (process dead but PID file exists)"
            rm -f $PID_FILE
            exit 1
        else
            PID=`cat $PID_FILE`
            kill -term $PID
            echo "Stopped [$PID]"
            rm -f $PID_FILE
            exit 0
        fi
    else
        echo "Not running (PID not found)"
        exit 0
    fi
;;
restart)
    $0 stop
    $0 start
;;
*)
    echo "Usage: $0 {status|start|stop|restart}"
    exit 0
esac

Questions

1. Is there any way to monitor starting java application to see in which state currently is (loading, started, restarting, stale...)?
2. Any hints for above service/start scripts?

Thanks!