Kogito Serverless Workflow - Python Hello World Example

Description

This example contains a simple workflow definition that executes a python standard function library

Installing and Running

Prerequisites

You will need:

  • Java 17+ installed
  • Environment variable JAVA_HOME set accordingly
  • Maven 3.8.6+ installed
  • Python3 installed

When using native image compilation, you will also need:

  • GraalVm 19.3.1+ installed
  • Environment variable GRAALVM_HOME set accordingly
  • LD_LIBRARY_PATH should include GRAALVM_HOME/lib/server
  • Note that GraalVM native image compilation typically requires other packages (glibc-devel, zlib-devel and gcc) to be installed too. You also need ‘native-image’ installed in GraalVM (using ‘gu install native-image’). Please refer to GraalVM installation documentation for more details.

Compile and Run in Local Dev Mode

mvn clean package quarkus:dev

Compile and Run in JVM mode

mvn clean package 
java -jar target/quarkus-app/quarkus-run.jar

or on windows

mvn clean package
java -jar target\quarkus-app\quarkus-run.jar

Compile and Run using Local Native Image

Note that this requires GRAALVM_HOME to point to a valid GraalVM installation Also LD_LIBRARY_PATH should include GRAALVM_HOME/lib/server

mvn clean package -Pnative

To run the generated native executable, generated in target/, execute

./target/serverless-workflow-python-quarkus-{version}-runner

Submit a request

The service based on the JSON workflow definition can be access by sending an empty request to http://localhost:8080/python_helloworld

curl -X POST -H 'Content-Type:application/json' -H 'Accept:application/json' -d '{}' http://localhost:8080/python_helloworld

It will return as result the current year