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Bring your own language into SAP Data Intelligence – julia

This blog explains how to run code in SAP Data Intelligence with the programing language of your choice.

There are many programming languages that are directly supported ( Python, Go, JavaScript) via the use of the respective out of the box Operators. The current blog explains how to address the case of a language which is not directly supported. The only requirement for achieving this in ensuring you have a docker image available to run your language.

As an example, I am demonstrating how to run julia inside SAP Data Intelligence.

 

Create your Docker file

Log on to SAP Data Intelligence and access the Modeler app.

Click the Repository tab, right click the dockerfiles folder and choose the Create Docker File option.

Create%20Dockerfile

Name the Dockerfile and press ok.

Name%20Dockerfile

You now need to write the script that defines the Dockerfile.

For this, you can take a look at the Dockerfile shown in org.opensuse.

opensuse%20Dockerfile

In the end, your file should look something like this (notice the FROM julia.latest row):

FROM julia:latest
RUN groupadd -g 1972 vflow && useradd -g 1972 -u 1972 -m vflow
USER 1972:1972
WORKDIR /home/vflow
ENV HOME=/home/vflow

You then need to add a tag to the Dockerfile so it can be used with an Operator.

Add%20Tag

Finally, save your Dockerfile and press build button. After the build is done, the respective status should show as completed.

julia%20dockerfile

 

Create your Operator

Now you need to create an Operator that is able to receive and run julia code.

For this, copy the Command Executor Operator as follows.

Go into the Repository tab and access the com.sap.system.commandExecutor folder. Right click the operator.json file and select the Export File option.

Export%20File

Now create a new folder under the Operators folder where you can store your custom Operators.

Create%20folder

Create%20folder

Inside this new folder, create a folder for your julia Operator and import the commandExecutor operator.json file you had exported.

Import%20json

Double click the json file to edit your new operator.

Go to the Show JSON option and change the description.

Edit%20Operator

Switch to the Show Form option, choose the Tags tab and add julia as a tag. This will ensure that the Operator runs with the Dockerfile you created.

Add%20Tag%20Operator

Go to the Configuration tab and set the cmdLine argument to julia:

Set%20command%20argument%20to%20julia

Optional – add your own icon to the Operator

You can upload a .svg file to use as your Operator’s icon.

 

Add%20icon%202

Save the operator.

 

Test you Operator in a Graph

I will show how to create a simple graph that uses the following Operators:

  • One instance of the Terminal Operator that will be used to type julia code
  • One instance of our julia Operator
  • One instance of the Terminal Operator that will show the output of julia’s execution

Create the Graph

Go to the Graphs tab and create a new Graph as shown:

Save the Graph.

Save%20graph

Run the Graph

Once the Graph is saved, you can run it.

Run%20Graph

After the Graph is running, click the Show Status Details link, right-click on the first instance of the Terminal operator and select Open UI.

Show%20Status%20Details

Run%20details

 

You are now ready to try out some julia code!

Type the following example instructions in your terminal window:

Type%20commands%20in%20terminal

Now go back to the run details and open the UI for the second Terminal.

You will see the output your Operator produced after running your instructions:

Check%20julia%20result

 

Summary

It is possible to execute code in SAP Data Intelligence for a programming language that is not directly supported by the tool. For that you need to:

  • Deploy a Dockerfile that allows you to run that language
  • Create a customer Operator (e.g., via an extension of the Command Executor Operator ) that runs with that Dockerfile
5 Comments
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  • Hi Guilherme,

     

    Thanks for this informative article. Is there are reason why you declare three base images in the dockerfile? Shouldn't be "FROM julia:latest" enough?

     

    Thanks

    Yann

  • Hi Guilherme,

    Thanks for the informative post! Is there also a way to add the script tab in the operator editor(akin to python3 operator) so that the ability to directly code inside the operator becomes available?

    Thanks- Ujwal