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Homelab, Linux, JS & ABAP (~˘▾˘)~
 
Fiori / SAPUI5

[SAPUI5] Deploying the ui5 sample app on debian

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I’m deploying the openui5-sample-app to a Linux Container running Debian Buster. First update the packages and install Node.js.

apt update && apt upgrade -y
apt install curl -y
curl -sL https://deb.nodesource.com/setup_12.x | bash -
apt install nodejs -y
nodejs --version

Install PM2 (process manager to manage Node.js applications) and the UI5 Tooling

npm install pm2 -g
npm install --global @ui5/cli

Now clone the openui5-sample-app and build it

apt install git
git clone https://github.com/SAP/openui5-sample-app.git
cd openui5-sample-app/
ui5 build -a
cd ..

Run your project on port 8000. With “startup” it will automatically create a systemd script.

pm2 serve openui5-sample-app/dist/ 8000
pm2 startup
pm2 save
systemctl start pm2-root
systemctl status pm2-root

Fiori / SAPUI5

[SAPUI5] local ui5 development

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1. Install node.js

2. Install UI5 Tooling

npm install --global @ui5/cli

3. Install Easy UI5 Generator, create a project and run it on your localhost

npm install -g yo generator-easy-ui5
yo easy-ui5
cd <your project name> 
npm start

4. Set up a Github project and do your initial push

git add .
git commit -m "Initial commit"
git remote add origin https://github.com/user/myUI5App.git 
git push origin master

5. Install your favorite Editor, e.g. Visual Studio Code or Atom, and open your project to edit it

Uncategorized

RSS-Feeds abonnieren

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Hat eine Website keine direkte bzw. sichtbare Verlinkung zu ihrem RSS/Atom Feed (meist dieses Icon, wie hier direkt in der Überschrift), kann man trotzdem versuchen die Website zu abonnieren, da die meisten CMS die RSS Funktionalität von Haus aus mitbringen. Meist muss lediglich /rss, /feed, /atom oder /index.xml an der entsprechenden URL angehängt werden, z.B.: 

https://jellyfin.org/posts/index.xml

oder bei WordPress Seiten häufig einfach mit rss, feed oder atom:

https://nocin.eu/rss
https://nocin.eu/feed
https://nocin.eu/atom

Alternativ hilft auch das Firefox Addon Feed Preview um auf mögliche RSS Feeds aufmerksam gemacht zu werden.

Als RSS Reader benutze ich Nextcloud News in Kombination mit der News App aus dem F-Droid Store.

Fiori / SAPUI5

[SAPUI5] Versioning

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SAPUI5 follows Semantic Versioning.

MAJOR.MINOR.PATCH (e.g. 1.71.9)

  • Patches are mostly bug fixes.
  • Minor releases bring new features.
  • Major contains incompatible API changes.

Version overviews:
https://sapui5.hana.ondemand.com/versionoverview.html
https://openui5.hana.ondemand.com/versionoverview.html

Find detailed patchinfos here:
https://sapui5.hana.ondemand.com/X.XX.X/patchinfo.html (where X.XX.X is the SAPUI5 version number)
https://openui5.hana.ondemand.com/X.XX.X/patchinfo.html (where X.XX.X is the OpenUI5 version number)

Note: “sap.ui.core and sap.m are special, because they are OpenUI5 libraries. Currently, OpenUI5 libraries are always released as a whole. This means that whenever there is a change to be released for any of the OpenUI5 libraries, the new patch includes them all.”

ABAP

[ABAP] Calculation

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* ab ABAP 7.54
DATA field TYPE p decimals 2.

field += 4.
field -= 2.
field *= 3.
field /= 2.

*obsolet: ADD, SUBSTRACT, MULTIPLY, DIVIDE
ABAP

[ABAP] Alpha conversion

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DATA(lv_matnr) = VALUE matnr( 0000000001 ).
DATA(character_string) = VALUE string( ).

character_string = |Your Material Number is { lv_matnr ALPHA = IN }|.    "Adds leading zeros
character_string = |Your Material Number is { lv_matnr ALPHA = OUT }|.   "Removes leading zeros

SAP Cloud Platform ABAP Environment

[ABAP Env] Create Data Model & OData Service

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Recently I worked through the tutorial on creating a travel bookings app in the SAP Cloud Platform ABAP Environment.

Find a good introduction and overview on this topic here: Getting Started with ABAP in the Cloud – Part I
And the travel bookings app tutorial here: Getting Started with ABAP in the Cloud – Part II

These are my notes on the steps needed to create the data model and publish it as oData service.

#LayerNomenclatureDescription
1Database TableZTABLEPlace your raw data first
2Data Definition (Interface View)ZI_Relation between different tables (e.g. currency or text table)
3Projection View (Consumption View)ZC_Configure the UI depending on your scenario.
Use different projection views for different usages of the same interface view and the same physical table.
4Service DefinitionZSD_Expose the projection view (and underlying associations like currency, country…) as service
5Service BindingZSB_How to we want to make the service available? Defines the binding type (OData V2 / OData V4)
Activate it with the “Activate” Button within the editor window.
Select the Entity and hit “Preview…” to see whtat we defined in our projection view.

If you’ve done this, you are able to view the data in a generated Fiori Elements app. But if you also want to create, edit, delete data, you’ll have to add some behavior functionality.

6Behavior Definition on Data DefinitionZI_Created on top of the Data Definition. Will get the same name es the Data Definition.
Implementation Type: Managed
Defines the operations create, delete, edit.
7Behavior Implementation on Definition ViewZBP_I_The code for the behavior… For the travel app tutorial, some logic for a generated unique key and field validation.
The class inherits from cl_abap_behavior_handler.
8Behavior Definition on Projection ViewZC_Created on top of the Projection View. Will get the same name es the Projection View.
Defines the operations create, delete, edit.
Docker

[Docker] Usefull commands

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Image Handling

docker image listlist downloaded images
docker rmi image_namedelete image

Administration

docker system dfshow docker disk usage
docker system prunefree space – remove stopped containers, images, cache
systemctl restart docker.servicerestarts the docker service (and all your container)
ss -tulpncheck if docker containers listen to any port
docker exec contaienr_id cat /etc/hosts
or
docker inspect -f ‘{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}’ contaienr_id		check container ip address

Container Handling

docker pslist running containers
docker ps -alist all the docker containers (running and stopped)
docker stop container_idstop container
docker rm container_iddelete stopped container
docker update –restart=unless-stopped container_idmake sure container re-start, unless manually stopped
docker run -l debug container_idrun container with log
docker logs -f container_iddisplay log
docker exec -it container_id /bin/shopen a shell in the running container
docker commit container_id user/test_imagethis command saves modified container state into a new image user/test_image
docker run -ti –entrypoint=sh user/test_imagerun with a different entrypoint
docker run –volume-driver=nfs container_idmount NFS share

Docker Compose

docker-compose -f ~/docker/docker-compose.yml up -d The -d option daemonizes it in the background
docker-compose -f ~/docker/docker-compose.yml down completely stop and remove containers, images, volumes, and networks (go back to how it was before running docker compose file)
docker-compose -f ~/docker/docker-compose.yml pullPull latest images
docker-compose logs container_id check real-time logs
docker-compose stop container_id stops a running container
docker-compose configtest your.env file which is used for variable substitution in the docker-compose.yaml
Terminal

[Shell] User and Group management & File permissions

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  • User and Group management
    • id
    • useradd
      • -c – Full name
      • -e – Expiration date
      • -s – Default shell
      • -d – Home directory
    • passwd
    • usermod
      • -l – rename
      • -L – Lock
      • -U – unlock
    • userdel
      • -r – remove user data
    • groupadd
    • groupmod
    • gpasswd [-a -d -A] [user1, user2] [group]
    • newgrp [group]
  • su vs. su – vs. sudo
    • visudo
  • File permissions
    • UGO – User, Group, Other
    • RWX – Read, Write, Execute
    • chmod -R g+x (grant recursive execute permission to group)
      • r = 4
      • w = 2
      • x = 1
      • – = 0
      • rwxrwxrwx = 777
      • rw-rw-rw- = 666
      • rwxrwxr–- = 774
      • rw-rw—- = 660
      • rw-r—–- = 640
    • chown
    • chgrp
    • umask

https://www.sluug.org/resources/presentations/2020/2020-02-12_permissions.pdf