B4J Question how to get a b4j job running at reboot raspberry?

[MbedAndroid]

i'm trying to get a b4j program running at reboot of raspberry
I found already lot of comments and examples on the net, but still no lock
Tried Cron: see the cron starts the job, but no running java program
May be someone encounters this problem yet, and solved it?
-Tried to make a batch file: no luck.
Inserted it in cron (as root and as user) @reboot /home/pi java -jar test.jar : no luck
Inserted it in rc.local: no luck

even when i run it every minute i see cron start the bash job, but no action of the program
CRON[20537]: (root) CMD (bash /home/pi/jar-start.sh)

followed this topic : no luck http://raspberrypi.stackexchange.com/questions/13034/executing-a-jar-file-when-raspberry-boots-up

anyone a suggestion?

 

[imbault]

go to /etc
edit rc.local
add those 2 lines according to your needs just befrore the end of rc.local :

cd /home/pi/taboo
/usr/bin/java -jar PushTaboo.jar &

 

[MbedAndroid]

it's some other java dir? as on rasbian /usr/bin/java is empty...

 

[Roycefer]

Check out my tutorial on RasPi start up tasks in this post: http://b4x.com/android/forum/threads/jvm-kvm-raspi-etc-open-source.61029/

 

[Erel]

You can write java instead of /usr/bin/java.

 

[MbedAndroid]

somehow it still doesnt work...
puzzling....

 

[DonManfred]

somehow it still doesnt work

dont know but maybe the double spaces (should be one?) between -jar and test.jar

 

[MbedAndroid]

mmm no
i can run a small testprogram as sudo /etc/rc.local
but i wont run at reboot.
the testprogram sends me a mail, so i that way i know it works or not

 

[rwblinn]

Hi,

suggest again to try cron as follows.

Create folder /home/pi/scripts

Create a script pushtaboo.sh with content
#!/bin/sh
cd /home/pi/taboo
java -jar pushtaboo.jar

Make pushtaboo.sh executable:
chmod 755 /home/pi/scripts/pushtaboo.sh

Add pushtaboo.sh to cron:
sudo crontab -e
Add at the end of the file:
@reboot sudo /home/pi/scripts/pushtaboo.sh

 

[MbedAndroid]

he rwblinn....
got some succes...just received a mail from the rasp
but i discovered that it come after i started crontab manually. Seems that rc.local doesnt start crontab or rc.local is not executed....

 

[MbedAndroid]

the key of the problem seems to be rc.local not been executed..
trying sudo /etc/init.d/rc.local gives positive results, but it's not been executed after reboot...

 

[rwblinn]

Hi,

if you stick using rc.local, checkout if the information here helps.

 

[warwound]

Dunno if there's any useful info in this post of mine:
https://www.b4x.com/android/forum/t...ect-to-any-remote-db.31540/page-8#post-217480

 

[MbedAndroid]

the rc.local is fine, no problems with the script, but it isnt called during bootup, probably due some changes in the past.
dont know what program is calling rc.local. I inserted a line for test which dumps a txt file. During bootup nothing happens, manually i see the dump.

Will have a look at warwound's example

 

[jinyistudio]

Hi

I have this problem too, Did you solved this problem ?

 

[jinyistudio]

Is /etc/rc.local, not /etc/init.d/rc.local

 

[MbedAndroid]

Is /etc/rc.local, not /etc/init.d/rc.local

i solved it with Cron.

 

[rwblinn]

Use a cron job.
Example:
To edit: sudo crontab -e.
Add a line like

@reboot sudo javapath -jar b4japppath/b4japp.jar&

To list cronjobs: sudo crontab -l.

Notes:
The b4japp.jar must be made executable: sudo chmod a+x b4japp.jar.

Using a script is also an option instead of calling the b4japp.jar. Make the script executable (sudo chmod a+x scriptname.sh).
Script Example:

#Set folder containing jar
cd /home/pi/b4jappfolder

#Start the b4japp
/usr/bin/java -jar b4japp.jar&
printf "b4japp started"

 

[MbedAndroid]

here a update about this issue
my sd card was broken, so i installed a new rasbian.
And to my surprice the command in rc.local is working now.
somehow something was broken in the previous installation