B4J Tutorial [ABMaterial] How to run it on a Raspberry Pi

How to run ABMaterials on a Raspberry Pi

Using:
B4J v7.51
OpenJDK11
Raspberry Pi 3 and Asus Tinkerboard
DietPi image 6.25.3
Chrome, Firefox and Edge
The project 'Demo' from ABMaterial4.30.zip

1.
Copy the Demo folder from the zip-file to your B4J projects folder.
To develop a good habbit,
Goto Objects/www and delete css, font and js folders.
Replace with the newest css, font and js folders from the zip-file.
Compile Demo.b4j in debug to create copymewithjar.needs
Compile Demo.b4j in Release
2.
Download a DietPi image from dietpi.com
Follow Getting started at dietpi.com/phpbb/viewtopic.php?f=8&t=9#p9
Download Putty, a SSH client, from www.chiark.greenend.org.uk/~sgtatham/putty/latest.html
Use Putty to connect to your Pi.
Login as root, pw dietpi.
At first boot you will be guided through different settings:
Change global password.
Change users passwords.
Disable seriel TTY.
In DietPi-Software, change SSH Server from Dropbear to OpenSSH
3.
After the Reboot, Login as root, Install Java with these commands:
wget https://github.com/bell-sw/Liberica...4/bellsoft-jdk11.0.4-linux-arm32-vfp-hflt.deb
sudo apt-get install ./bellsoft-jdk11.0.4-linux-arm32-vfp-hflt.deb
java -version , test that java is installed.
4.
Download WinSCP, a SecureCoPy client, from https://winscp.net/download/WinSCP-5.15.3-Setup.exe
Start WinSCP
You can delete /root/bellsoft-jdk.......... file
In left side, navigate to \Demo\Objects folder
In right side, navigate to /usr folder
Right click and create demo folder and go to demo folder
I left side, select all files from Objects folder and press Upload
In right side, go back to the root folder
Right click and select New-File, name it demo.sh, inset these 2 lines:
cd /usr/demo
nohup java -jar Demo.jar > nohup.out
Remeber that demo.jar and Demo.jar are two different files
5.
Start Putty
Login as root
Start the ABM Demo, bash demo.sh
Start a browser and goto http://your-Pi-IP:51042/demo
6.
Last task is to make the server run at boot and with no user logged in.
Start Putty and start dietpi-config
Go to AutoStart Options, select 14:Custom
This creates this script
/var/lib/dietpi/dietpi-autostart/custom.sh
Start WinSCP
In right side, navigate to /var/lib/dietpi/dietpi-autostart folder
Right click custom.sh and select Edit
Add this line at the bottom: bash /root/demo.sh
Thats it.


Useful commands:

Monitor the logs with:
tail -f /usr/demo/nohup.out

Find the process number:
ps -ef | grep java

Kill the server:
kill <process number>

Find a file:
cd /
find . -name <name of file or directory> -print | more

Update everything.
apt-get update

Delete unused packages:
apt autoremove

 

[Cableguy]

You should mention which Raspberry pi board your tutorial is targeting as there seems to be some differences between the pi3 and pi4...
Or at least, mention "Tested with pi X board"

 

[janderkan]

You should mention which Raspberry pi board your tutorial is targeting as there seems to be some differences between the pi3 and pi4...
Or at least, mention "Tested with pi X board"

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