control

#!/bin/bash

WORKSPACE=$(cd $(dirname $0)/; pwd)
cd $WORKSPACE

mkdir -p var

module=jmxmon
version=0.0.2
app="$module-$version-jar-with-dependencies.jar"
conf=conf.properties
sampleconf=conf.example.properties
pidfile=var/app.pid
logfile=var/app.log
historyfile="jmxmon.txt"

function check_pid() {
    if [ -f $pidfile ];then
        pid=`cat $pidfile`
        if [ -n $pid ]; then
            running=`ps -p $pid|grep -v "PID TTY" |wc -l`
            return $running
        fi
    fi
    return 0
}

function start() {

    if [  -f "$historyfile" ]; then
        #echo "MSG:The old monitor data will be deleted,Please Type y"
        rm -f jmxmon.txt
    fi
    check_pid
    running=$?
    if [ $running -gt 0 ];then
        echo -n "$app now is running already, pid="
        cat $pidfile
        return 1
    fi

    if ! [ -f $conf ];then
        echo "Config file $conf doesn't exist, creating one."
        cp $sampleconf $conf
    fi
    nohup java -cp ./$app com.stephan.tof.jmxmon.JMXMonitor $conf &> $logfile &
    sleep 1
    running=`ps -p $! | grep -v "PID TTY" | wc -l`
    if [ $running -gt 0 ];then
        echo $! > $pidfile
        echo "$app started..., pid=$!"
    else
        echo "$app failed to start."
        return 1
    fi
}

function stop() {
    pid=`cat $pidfile`
    kill $pid
    rm -f $pidfile
    echo "$app stoped..."
}

function restart() {
    stop
    sleep 1
    start
}

function status() {
    check_pid
    running=$?
    if [ $running -gt 0 ];then
        echo started
    else
        echo stoped
    fi
}

function tailf() {
    tail -f $logfile
}


function help() {
    echo "$0 start|stop|restart|status|tail"
}

if [ "$1" == "" ]; then
    help
elif [ "$1" == "stop" ];then
    stop
elif [ "$1" == "start" ];then
    start
elif [ "$1" == "restart" ];then
    restart
elif [ "$1" == "status" ];then
    status
elif [ "$1" == "tail" ];then
    tailf
else
    help
fi