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

Discussion in 'B4J Tutorials' started by janderkan, Aug 21, 2019.

  1. janderkan

    janderkan Active Member Licensed User

    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
     
    Erel, OliverA and alwaysbusy like this.
  2. Cableguy

    Cableguy Expert Licensed User

    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"
     
  3. janderkan

    janderkan Active Member Licensed User

    6 th line from the top :)
     
    Cableguy likes this.
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