neermitt/zeebe-script-worker repository overview

⁠zeebe-script-worker

A Zeebe worker to evaluate scripts (i.e. script tasks). Scripts are useful for prototyping, to do (simple) calculations, or creating/modifying variables.

⁠Usage

Example BPMN with service task:

<bpmn:serviceTask id="scripting" name="Evaluate the Script">
  <bpmn:extensionElements>
    <zeebe:taskDefinition type="script" />
    <zeebe:taskHeaders>
      <zeebe:header key="language" value="javascript" />
      <zeebe:header key="script" value="a + b" />
    </zeebe:taskHeaders>
  </bpmn:extensionElements>
</bpmn:serviceTask>

• the worker is registered for the type script
• required custom headers:
  • language - the name of the script language
  • script - the script to evaluate
• available context/variables in script:
  • job (ActivatedJob) - the current job
  • zeebeClient (ZeebeClient) - the client of the worker
• the result of the evaluation is passed as result variable

Available script languages:

• javascript (Oracle Nashorn)
• groovy⁠
• feel⁠
• python 2 (jython)

⁠Install

1. Download the JAR file⁠

2. Execute the JAR via

   java -jar target/zeebe-script-worker-{VERSION}.jar

⁠Configuration

The connection can be changed by setting the environment variables:

• zeebe.client.broker.contactPoint (default: 127.0.0.1:26500).

⁠Build from Source

Build with Maven:

mvn clean install

⁠Code of Conduct

This project adheres to the Contributor Covenant Code of Conduct⁠. By participating, you are expected to uphold this code. Please report unacceptable behavior to [email protected]⁠.