B4J Question Raspiberry Pi how to auto start java server app?

dragonguy · Jan 22, 2016

i use b4j write a small server type application need to run on raspiberry pi.
i'm able run at raspiberry pi manual launch the application with no error, but i need to auto start the application when device boot. how can i do that, i already test many way but fail.
please help me.

here some link i tested but fail
http://www.raspberrypi-spy.co.uk/2014/05/how-to-autostart-apps-in-rasbian-lxde-desktop/
http://raspberrypi.stackexchange.com/questions/8734/execute-script-on-start-up

Siam · Jan 22, 2016

Hello,

put this script to /etc/init.d/<name of your start script>

#!/bin/sh
### BEGIN INIT INFO
# Provides: Für welches Programm ist das Script?
# Required-Start:
# Required-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Kurze Beschreibung
# Description: Längere Beschreibung
### END INIT INFO

# Actions
SERVICE_NAME=<PUT HERE THE NAME OF THE SERVICE> Sample ; My Service
PATH_TO_JAR=<PUT HERE THE PATH TO YOUR JAR> Sample: /var/www/html/gpio.jar
PID_PATH_NAME=/tmp/MyService-pid
case $1 in
start)
echo "Starting $SERVICE_NAME ..."
if [ ! -f $PID_PATH_NAME ]; then
# Change Here the filename of the .log file
# if no Logfile is neded then comment the next line with #
nohup java -jar $PATH_TO_JAR /tmp 2>> /var/log/gpio.log >> /var/log/gpio.log &
# and uncommend folowing line to start without logfile
# nohup java -jar $PATH_TO_JAR /tmp 2>> /dev/null >> /dev/null &
echo $! > $PID_PATH_NAME
echo "$SERVICE_NAME started ..."
else
echo "$SERVICE_NAME is already running ..."
fi
;;
stop)
if [ -f $PID_PATH_NAME ]; then
PID=$(cat $PID_PATH_NAME);
echo "$SERVICE_NAME stoping ..."
kill $PID;
echo "$SERVICE_NAME stopped ..."
rm $PID_PATH_NAME
else
echo "$SERVICE_NAME is not running ..."
fi
;;
restart)
if [ -f $PID_PATH_NAME ]; then
PID=$(cat $PID_PATH_NAME);
echo "$SERVICE_NAME stopping ...";
kill $PID;
echo "$SERVICE_NAME stopped ...";
rm $PID_PATH_NAME
echo "$SERVICE_NAME starting ..."
nohup java -jar $PATH_TO_JAR /tmp 2>> /dev/null >> /dev/null &
echo $! > $PID_PATH_NAME
echo "$SERVICE_NAME started ..."
else
echo "$SERVICE_NAME is not running ..."
fi
;;
esac

Step2:
sudo chmod +x /etc/init.d/<name of your start script>

Step3:
sudo update-rc.d <name of your start script> defaults

Step4:
Test Your script with:

sudo /etc/init.d/<name of your start script> start
sudo /etc/init.d/<name of your start script> stop
sudo /etc/init.d/<name of your start script> restart

regards

Andy

dragonguy · Jan 22, 2016

i follow the steps but still cant get it work, how come? please help me.

Siam · Jan 22, 2016

hi what works not ? only autostart or the startscript ? have you errormessages ?

dragonguy · Jan 22, 2016

startscript i got message here

B4X:

pi@raspberrypi /etc/init.d $ sudo /etc/init.d/alarm_server.sh start
Starting AlarmServer ...
AlarmServer is already running ...
pi@raspberrypi /etc/init.d $ sudo /etc/init.d/alarm_server.sh stop
AlarmServer stoping ...
/etc/init.d/alarm_server.sh: 34: kill: No such process

AlarmServer stopped ...

i use top to check

B4X:

Tasks:  90 total,   1 running,  89 sleeping,   0 stopped,   0 zombie
%Cpu(s):  0.7 us,  2.0 sy,  0.0 ni, 97.4 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
KiB Mem:    445032 total,   161532 used,   283500 free,    19344 buffers
KiB Swap:   102396 total,        0 used,   102396 free,    88756 cached

  PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND
2578 pi        20   0  4672 2396 2012 R   1.0  0.5   0:09.51 top
1605 root      20   0  1752 1224 1140 S   0.3  0.3   0:00.29 ifplugd
2148 root      20   0 21452  10m 7016 S   0.3  2.3   0:02.24 Xorg
2329 pi        20   0  113m  21m  19m S   0.3  5.0   0:08.53 lxpanel
    1 root      20   0  2148 1360 1256 S   0.0  0.3   0:01.86 init
    2 root      20   0     0    0    0 S   0.0  0.0   0:00.00 kthreadd
    3 root      20   0     0    0    0 S   0.0  0.0   0:00.25 ksoftirqd/0
    5 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 kworker/0:0H
    6 root      20   0     0    0    0 S   0.0  0.0   0:00.06 kworker/u2:0
    7 root      20   0     0    0    0 S   0.0  0.0   0:01.23 rcu_preempt
    8 root      20   0     0    0    0 S   0.0  0.0   0:00.00 rcu_sched
    9 root      20   0     0    0    0 S   0.0  0.0   0:00.00 rcu_bh
   10 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 khelper
   11 root      20   0     0    0    0 S   0.0  0.0   0:00.01 kdevtmpfs
   12 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 netns
   13 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 perf
   14 root      20   0     0    0    0 S   0.0  0.0   0:00.00 khungtaskd
   15 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 writeback
   16 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 crypto
   17 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 bioset
   18 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 kblockd
   19 root      20   0     0    0    0 S   0.0  0.0   0:01.57 kworker/0:1
   20 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 rpciod
   21 root      20   0     0    0    0 S   0.0  0.0   0:00.00 kswapd0
   22 root      20   0     0    0    0 S   0.0  0.0   0:00.00 fsnotify_mark
   23 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 nfsiod
   29 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 kthrotld
   30 root       1 -19     0    0    0 S   0.0  0.0   0:00.00 VCHIQ-0
   31 root       1 -19     0    0    0 S   0.0  0.0   0:00.00 VCHIQr-0
   32 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 VCHIQs-0
   33 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 iscsi_eh
   34 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 dwc_otg
   35 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 DWC Notificatio
   37 root      20   0     0    0    0 S   0.0  0.0   0:00.00 VCHIQka-0
   38 root      10 -10     0    0    0 S   0.0  0.0   0:00.00 SMIO
   39 root       0 -20     0    0    0 S   0.0  0.0   0:00.00 deferwq
   40 root      20   0     0    0    0 S   0.0  0.0   0:00.29 kworker/u2:2

cant find my application

dragonguy · Jan 22, 2016

here is my script

B4X:

#!/bin/sh
### BEGIN INIT INFO
# Provides: Alarm Server
# Required-Start:
# Required-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Alarm Server
# Description: Alarm Server
### END INIT INFO

# Actions
SERVICE_NAME=AlarmServer
PATH_TO_JAR=/home/pi/Alarm_Server/alarmserver.jar
PID_PATH_NAME=/tmp/AlarmServer-pid
case $1 in
start)
echo "Starting $SERVICE_NAME ..."
if [ ! -f $PID_PATH_NAME ]; then
nohup java -jar $PATH_TO_JAR /tmp 2>> /dev/null >> /dev/null &
# Change Here the filename of the .log file
# if no Logfile is neded then comment the next line with #
# nohup java -jar $PATH_TO_JAR /tmp 2>> /var/log/gpio.log >> /var/log/gpio.log &
echo $! > $PID_PATH_NAME
echo "$SERVICE_NAME started ..."
else
echo "$SERVICE_NAME is already running ..."
fi
;;
stop)
if [ -f $PID_PATH_NAME ]; then
PID=$(cat $PID_PATH_NAME);
echo "$SERVICE_NAME stoping ..."
kill $PID;
echo "$SERVICE_NAME stopped ..."
rm $PID_PATH_NAME
else
echo "$SERVICE_NAME is not running ..."
fi
;;
restart)
if [ -f $PID_PATH_NAME ]; then
PID=$(cat $PID_PATH_NAME);
echo "$SERVICE_NAME stopping ...";
kill $PID;
echo "$SERVICE_NAME stopped ...";
rm $PID_PATH_NAME
echo "$SERVICE_NAME starting ..."
nohup java -jar $PATH_TO_JAR /tmp 2>> /dev/null >> /dev/null &
echo $! > $PID_PATH_NAME
echo "$SERVICE_NAME started ..."
else
echo "$SERVICE_NAME is not running ..."
fi
;;
esac

Siam · Jan 22, 2016

The Starscript seems OK after you have start your app you musst look for JAVA in top

dragonguy · Jan 22, 2016

i cant see the java in top, i suspend my app didnt running

Siam · Jan 22, 2016

hi,

please enable the log option and show if there is an error in the logfile after you have start the app

dragonguy · Jan 22, 2016

logfile here

B4X:

main._appstart (java line: 65)
java.io.FileNotFoundException: /config.txt (No such file or directory)
        at java.io.FileInputStream.open(Native Method)
        at java.io.FileInputStream.<init>(FileInputStream.java:131)
        at anywheresoftware.b4a.objects.streams.File.OpenInput(File.java:225)
        at anywheresoftware.b4a.objects.streams.File.ReadMap2(File.java:322)
        at anywheresoftware.b4a.objects.streams.File.ReadMap(File.java:309)
        at b4j.example.main._appstart(main.java:65)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl$
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcce$
        at java.lang.reflect.Method.invoke(Method.java:483)
        at anywheresoftware.b4a.BA.raiseEvent2(BA.java:93)
        at anywheresoftware.b4a.BA.raiseEvent(BA.java:84)
        at b4j.example.main.main(main.java:29)

config.txt store at /home/pi/Alarm_server/
same location of jar file.

dragonguy · Jan 22, 2016

is it need to copy java into the jar folder,then execute?

Siam · Jan 22, 2016

add the complete path to your load config : /home/pi/Alarm_server/config.txt

dragonguy · Jan 22, 2016

ok i try later

dragonguy · Jan 22, 2016

yes. finally now can run my application. thanks bro!

dragonguy · Jan 22, 2016

one more problem about raspberry pi now auto start my app in background when boot, how can i bring it back to foreground?
i want to see my dataon the screen.

Siam · Jan 22, 2016

i'm not sure if this works with the command :

fg <PID from your app>

you can bring the service to foreground
with

bg <PID from your app>

you can send it in the background

dragonguy · Jan 23, 2016

Thanks, bro! Anyway fg or bg cant make it working, when using jobs to check, nothing show.

Erel · Jan 24, 2016

If you are using nohup to run the program then you can run the following command to monitor the output:

B4X:

tail -f nohup.out

dragonguy · Jan 24, 2016

@Erel where i got the nohup.out file?
i always get this message

B4X:

pi@raspberrypi ~/Alarm_Server $ sudo tail -f nohup.out
tail: cannot open `nohup.out' for reading: No such file or directory

DonManfred · Jan 24, 2016

dragonguy said:
i always get this message

cause you are redirecting the standard out /dev/null instead of to nohup.out?
Sorry, if i get it wrong; my linux knowledge is a really basic one

B4J Question Raspiberry Pi how to auto start java server app?

Active Member

Active Member

Active Member

Active Member

Active Member

Active Member

Active Member

Active Member

Active Member

Active Member

Active Member

Active Member

Active Member

Active Member

Active Member

Active Member

Active Member

B4X founder

Active Member

Expert

Similar Threads