run java program as a daemon with jsvc

DemoDaemon.java

package server;

import org.apache.commons.daemon.Daemon;
import org.apache.commons.daemon.DaemonContext;
import org.apache.commons.daemon.DaemonInitException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * User: guoyong
 * Date: 12-9-17 上午10:21
 */
public class DemoDaemon implements Daemon {

    private final static Logger logger = LoggerFactory.getLogger(DemoDaemon.class);

    @Override
    public void init(DaemonContext context) throws DaemonInitException, Exception {

    }

    @Override
    public void start() throws Exception {

        Server.initialize();
        Server.start();
    }

    @Override
    public void stop() throws Exception {
        // jsvc -stop using kill -15 to stop the process, so the real stop method
        // should be called within a shutdown hook.
    }

    @Override
    public void destroy() {

    }
}

run.sh

#!/bin/bash

if [ -z "$JAVA_HOME" ]; then
  echo "JAVA_HOME is not set"
  exit 1
fi

type jsvc >/dev/null 2>&1 || { echo >&2 "jsvc is not installed.  Aborting."; exit 1; }

# Setup variables
SCRIPT=`readlink -f $0`
BASEDIR=$(cd $(dirname $SCRIPT)/..; pwd)
LIBS="$BASEDIR/lib"
EXEC=jsvc
CLASS_PATH="$BASEDIR/etc:$(echo $LIBS/*.jar | tr ' ' ':')"
CLASS=server.DemoDaemon
JVM_ARGS="-Xms1024m -Xmx1024m -Xss1m -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=9999 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false"
SYS_ENV="-Denv=PROD -Dlog.dir=$BASEDIR/logs"
USER=webmaster
PID=$BASEDIR/logs/server.pid
LOG_OUT=$BASEDIR/logs/server.out
LOG_ERR=$BASEDIR/logs/server.err

do_exec()
{
    $EXEC -home "$JAVA_HOME" -cp $CLASS_PATH -user $USER $SYS_ENV $JVM_ARGS -outfile $LOG_OUT -errfile $LOG_ERR -pidfile $PID $1 $CLASS
}

case "$1" in
    start)
        do_exec
            ;;
    stop)
        do_exec "-stop"
            ;;
    restart)
        if [ -f "$PID" ]; then
            do_exec "-stop"
            do_exec
        else
            echo "service not running, will do nothing"
            exit 1
        fi
            ;;
    *)
            echo "usage: daemon {start|stop|restart}" >&2
            exit 3
            ;;
esac